Showing posts sorted by relevance for query BLUE HYDROGEN. Sort by date Show all posts
Showing posts sorted by relevance for query BLUE HYDROGEN. Sort by date Show all posts

Thursday, August 19, 2021

 BLUE HYDROGEN IS A BIG OIL GIMMICK

'Expensive distraction': Chair of UK Hydrogen and Fuel Cell Association resigns citing blue hydrogen concerns


clock18 August 2021 • 

Image: 

A 3D rendering of a hydrogen storage tank | Credit: iStock

Protium CEO Chris Jackson claims blue hydrogen risks locking UK into reliance on fossil fuels as he quits the trade body

Chris Jackson has stepped down from his role as chair of the UK Hydrogen and Fuel Cell Association (UKHFCA), arguing that he is no longer able to advocate in good faith on behalf of 'blue' hydrogen made using fossil fuel gas coupled with carbon capture technology.

Jackson announced his resignation on Monday, just prior to the publication of the long-awaited UK Hydrogen Strategy, which confirmed the government's intention to take a "twin track" approach to scaling the low carbon fuel that will see support provided to both blue hydrogen as well as 'green' hydrogen, which is broadly regarded as more climate-friendly as it is produced using renewable energy.

Advocates of blue hydrogen argue that it is a critical transition energy source that would enable a raft of industries and processes - from home heating, transport, energy and heavy manufacturing - to decarbonise over the medium term while electrolyser capacity for producing green hydrogen is scaled up to meet growing demand. Several governments around the world have announced they intend to subsidise production of the low carbon fuel over the coming years as they seek to wean hard-to-abate industries off fossil fuels. In the UK, oil and gas giant BP is aiming to produce 1GW of the fuel at its H2 Teesside project by the end of this decade.

However, in a statement provided to trade publication H2 View earlier this week, Jackson expressed fears that the roll out of blue hydrogen could derail the UK's climate goals, because it risks keeping the country reliant on fossil fuel infrastructure and exploration for years to come, right when emissions need to be rapidly reduced to hit net zero targets. Blue hydrogen is produced using a process known as steam reforming, which splits methane from natural gas plants into its component parts of hydrogen and carbon, with most - but not all - of the resulting CO2 emissions mopped up using CCS.

"I believe passionately that I would be betraying future generations by remaining silent on that fact that blue hydrogen is at best an expensive distraction, and at worst a lock-in for continued fossil fuel use that guarantees we will fail to meet our decarbonisation goals," he said, echoing growing concerns raised by green groups in recent months.

Jackson, who is also the CEO and founder of green hydrogen outfit Protium, reiterated this sentiment in a statement provided to BusinessGreen on Wednesday, arguing his personal views on blue hydrogen meant that he could no longer "in good conscience" represent the interests of all players across the UK's fledgling hydrogen industry.

"Our industry is at a very important crossroad, one where the decisions we make will have long-lasting effects," he said. "I fully appreciate the energy transition cannot be achieved by one silver bullet, and green hydrogen alone cannot solve all the worlds challenges. Equally, I cannot ignore or make arguments for blue hydrogen being a viable and ‘green' energy solution (a fact also validated by external studies)."

"As chair of the UKHFCA, my role has been to represent the interests of all, even when I disagree," he added. "However, I feel I can no longer do this in good conscience. "There is a hugely important role for a trade group like the UKHFCA that can be a bridge between different interests, perspectives and companies. But it is also one that requires its leaders to hold positions of neutrality on some of the biggest questions the sector must answer. And I no longer feel that is consistent with my personal views on the role of hydrogen in the transition to a net zero world."

In a statement, UKHFCA CEO Celia Greaves thanked Jackson for his work as chair of the association and emphasised the body represented companies engaged in all types of hydrogen production. "We would like to thank Chris for his hard work on behalf of the association over the past 10 months and welcome his continued involvement on our executive committee," she said. "As the oldest and largest pan UK association, dedicated to the hydrogen sector and the fuel cell industry, our duty is to support stakeholders across the entire value chain and across all hydrogen production methods."

Jackson's resignation comes just a few days after a controversial academic study into the full lifecycle emissions of hydrogen produced by fossil fuel gas with carbon capture technology concluded its production could in some circumstances be worse for the climate than natural fossil fuelgas. The study estimated the emissions generated from the production of blue hydrogen are more than 20 per cent greater than burning natural gas or coal for heat and some 60 per cent greater than burning diesel oil for heat - although the study also drew criticism in some quarters over some of the assumptions used to draw its conclusions.



‘Blue hydrogen’ more carbon-intensive than gas and coal

By E&T editorial staff

Published Friday, August 13, 2021

A study by Cornell and Stanford University researchers has found that – despite being touted as an environmentally friendly approach to heating – blue hydrogen has a carbon footprint significantly greater than natural gas, coal and diesel.

Hydrogen is a potentially zero-carbon fuel source, producing just heat and water when burned or used in fuel cells and making it an attractive alternative to fossil fuels in transport, heating and industry. For instance, part of the UK government’s decarbonisation plan is a significant expansion in hydrogen to 5GW of capacity by 2030.

There are two approaches to producing hydrogen: blue hydrogen (produced by splitting natural gas into hydrogen and carbon dioxide) and green hydrogen (produced by splitting water via electrolysis into hydrogen and oxygen). While green hydrogen requires a large energy input, blue hydrogen cannot be described as a zero-emission fuel source, though it may be described as net-zero when used in conjunction with efficient carbon capture. Climate think tanks and campaigners have warned the UK government that blue hydrogen expansion will compromise its net-zero target.

The Cornell and Stanford researchers assessed the carbon footprint associated with blue hydrogen as defined by the US Department of Energy. The process begins by converting methane to hydrogen and carbon dioxide using heat, steam and pressure (grey hydrogen). Once some of the carbon dioxide has been captured and sequestered along with other impurities, it can be classed as blue hydrogen. This is a particularly energy-intensive process, with energy typically provided by burning more natural gas.

The researchers calculated that the carbon footprint to create blue hydrogen is more than 20 per cent greater than using either natural gas or coal directly for heat and 60 per cent greater than using diesel oil for heat.

“In the past, no effort was made to capture the carbon dioxide by-product of grey hydrogen and the greenhouse gas emissions have been huge,” said Professor Robert Howarth, a Cornell University environmental biologist. “Now the industry promotes blue hydrogen as a solution, an approach that still uses the methane from natural gas, while attempting to capture the by-product carbon dioxide. Unfortunately, emissions remain very large.”

Methane is a potent greenhouse gas: more than 100 times stronger as an atmospheric warming agent than carbon dioxide when first emitted. The UN’s recent climate change report called on governments to focus on cutting methane emissions in addition to decarbonisation efforts.

Emissions of blue hydrogen are less than for grey hydrogen by nine per cent to 12 per cent. The researchers wrote: “Blue hydrogen is hardly emissions free. Blue hydrogen as a strategy only works to the extent it is possible to store carbon dioxide long-term indefinitely into the future without leakage back to the atmosphere.”

Commenting on indiscriminate political support for hydrogen, Howarth said: “Political forces may not have caught up with the science yet. Even progressive politicians may not understand for what they’re voting. Blue hydrogen sounds good, sounds modern and sounds like a path to our energy future. It is not.”

The researchers emphasised the difference between blue hydrogen and green hydrogen, the latter of which has not yet been commercially realised.

“The best hydrogen, the green hydrogen derived from electrolysis - if used widely and efficiently - can be that path to a sustainable future,” said Howarth. “Blue hydrogen is totally different.”

UK hydrogen strategy 'needs clearer focus on renewables'

Trade body RenewableUK slams government plans for seeming to treat blue and green hydrogen as ‘interchangeable’

The UK government has launched a consultation on its new Hydrogen Strategy 

(pic credit: AsimPatel/Wikimedia Commons)


17 August 2021 by Craig Richard


The UK government aims to have 5GW of low-carbon hydrogen production capacity by 2030, but industry group Renewables UK has criticised the strategy for not focusing enough on developing a green hydrogen industry.

The government is consulting on using a business model similar to the contracts for difference (CfDs) used for renewable energy tenders in the UK in an attempt to reduce the cost gap between low-carbon hydrogen and fossil fuels.

Under the plan, the government would work with industry to assess the feasibility of mixing 20% hydrogen into the existing gas supply and determine what is needed from the UK’s network and storage infrastructure to support the hydrogen sector.

It is consulting on the design of a £240 million (€282 million) net-zero hydrogen fund to support the commercial deployment of low-carbon hydrogen production plants across the UK.

The government also plans to use a “twin track” approach to supporting multiple technologies, featuring a mix of green and blue hydrogen. Green hydrogen is made when renewable energy is fed through water, splitting oxygen from hydrogen molecules. Meanwhile, blue hydrogen is made by using methane to split natural gas to produce hydrogen and carbon dioxide, though some of the carbon dioxide is then captured.

Researchers from Cornell and Stanford Universities last week said blue hydrogen may be more harmful than gas and coal.
Not green enough

RenewableUK CEO Dan McGrail today said that the government’s strategy “doesn’t focus nearly enough on developing the UK’s world-leading green hydrogen industry”.

“The government must use the current consultation period to amend its plans and set out a clear ambition for green hydrogen,” he added. “We’re urging the government to set a target of 5GW of renewable hydrogen electrolyser capacity by 2030, as well as setting out a roadmap to get us there, to show greater leadership on tackling climate change.”

Meanwhile, director of future electricity systems at RenewableUK Barnaby Wharton said that both green and blue hydrogen would be needed to meet net zero targets, as green hydrogen is “truly zero carbon”, while blue hydrogen “can provide volume”. He said the government appeared to be treating the two as interchangeable and that he was concerned that creating a single market mechanism for both would be a “struggle”.

The government believes a UK hydrogen economy could be worth £900 million and create more than 9,000 jobs by 2020. This could then grow to being worth £13 billion and creating 100,000 jobs by 2050, by which point it could account for 20-35% of the UK’s energy consumption, it believes.

Study finds blue hydrogen worse than gas or coal

The carbon footprint of creating blue hydrogen is more than 20% greater than using either natural gas or coal directly for heat, or about 60% greater than using diesel oil for heat, according to joint research by Cornell and Stanford universities in the US.

The paper, which was published in Energy Science and Engineering, warned that blue hydrogen may be a distraction or something that may delay needed action to truly decarbonise the global energy economy.

A research team claimed blue hydrogen requires large amounts of natural gas to produce and said that even with the most advanced carbon capture and storage technology, there are a significant amount of CO2 and methane emissions that won’t be caught.

Blue hydrogen sounds good, sounds modern and sounds like a path to our energy future, it is not

Professors from the universities calculated that these fugitive emissions from producing hydrogen could eclipse those associated with extracting and burning gas when multiplied by the amount of gas required to make an equivalent amount of energy from hydrogen.

The paper comes hot on the heels of the United Nations’ Intergovernmental Panel on Climate Change report claiming methane has contributed about two-thirds as much to global warming as CO2 and as many governments are looking to invest in hydrogen production.

Robert Howarth, a Cornell University professor and co-author of the study, said: “Political forces may not have caught up with the science yet. Even progressive politicians may not understand for what they’re voting. Blue hydrogen sounds good, sounds modern and sounds like a path to our energy future. It is not.”

The UK is high up on the list of countries aiming to put blue hydrogen at the core of its energy transition agenda. UK energy consultancy Xodus recently launched a new report urging a bolder vision to enable the country to become a global leader in the adoption of hydrogen. The researchers, on the other hand, recommended a focus on green hydrogen, which is made using renewable electricity to extract hydrogen from water, leaving only oxygen as a byproduct.

“This best-case scenario for producing blue hydrogen, using renewable electricity instead of natural gas to power the processes, suggests to us that there really is no role for blue hydrogen in a carbon-free future. Greenhouse gas emissions remain high, and there would also be a substantial consumption of renewable electricity, which represents an opportunity cost. We believe renewable electricity could be better used by society in other ways, replacing the use of fossil fuels.”



Tuesday, August 17, 2021

BLUE HYDROGEN IS COVER FOR BIG OIL
Industry fires back at 'landmark' study claim that blue hydrogen is worse than natural gas

Study claims blue hydrogen could be dirtier than gas or coal, but critics say researchers used incorrect assumptions to come to incorrect conclusions


Feeling blue: a new peer-reviewed study claims blue hydrogen is worse than for the climate than just burning natural gas
Photo: AFP/SCANPIX

16 August 2021 
By Josh Lewis
UPSTREAM
in Perth

The oil and gas industry is still digesting new research that claims blue hydrogen could potentially be worse for the climate than burning natural gas, although some critics have also hit out at the landmark paper.

The study by researchers at Cornell and Stanford universities was published last week in the Energy Science & Engineering journal and is claimed to be a first-of-a-kind peer-reviewed study of blue hydrogen’s lifecycle greenhouse gases footprint.

The study claims to debunk the notion that blue hydrogen represents an emissions-free, or even low-emissions option, citing the large amounts of natural gas needed to fuel the process itself and the escape of “fugitive methane” from wells and other equipment along the supply chain.

For its default assumptions, which include a 3.5% emission rate of methane from natural gas and a 20-year global warming potential, the study found total carbon dioxide equivalent emissions for blue hydrogen are only 9% to 12% less than for grey hydrogen.

Blue hydrogen is produced from natural gas feedstocks, with the CO2 by-product from hydrogen production captured and stored.

If the UK is to succeed in reaching net zero we will need all the tools in our toolbox. We should applaud the government’s global leadership on clean hydrogen

Equinor executive vice president Al Cook

While admitting carbon dioxide emissions were lower, the study notes fugitive methane emissions for blue hydrogen were higher than grey because of an increased use of natural gas to power the carbon capture technology.

The study claims, under its default assumptions, that the greenhouse gas footprint of blue hydrogen is more than 20% greater than burning natural gas or coal for heat and some 60% greater than burning diesel oil for heat.

Even in a sensitivity analysis in which the methane emission rate from natural gas is reduced to a low value of 1.54%, the study found greenhouse gas emissions from blue hydrogen were still higher than just burning natural gas and only 18% to 25% less than for grey hydrogen.

The study authors note their analysis is a “best-case scenario” for blue hydrogen and assumes captured CO2 can be stored indefinitely, which they claim is “an optimistic and unproven assumption”.
'The results are stark'

"Politicians around the world, from the UK and Canada to Australia and Japan, are placing expensive bets on blue hydrogen as a leading solution in the energy transition,” said study co-author Robert Howarth.


'Act now, you idiots': Australian green groups call for action in wake of IPCC report
Read more

“Our research is the first in a peer-reviewed journal to lay out the significant lifecycle emissions intensity of blue hydrogen. This is a warning signal to governments that the only 'clean' hydrogen they should invest public funds in is truly net-zero, green hydrogen made from wind and solar energy."

The study also comes as the UK prepares to publish its long awaited hydrogen strategy, with blue hydrogen expected to play a role in the UK’s decarbonisation plans.

However, professor of mechanical engineering at the University of Cambridge, David Cebon, warned politicians to take note of the study’s findings before considering investment in blue hydrogen under the premise that it supports the UK’s climate goals.

“This landmark paper sheds light on the key unknown in the UK’s hydrogen debate: the greenhouse gas footprint of blue hydrogen. The calculation method is rigorous, the assumptions are all solid and the results are stark,” he said.

“Blue hydrogen cannot be considered ‘low-carbon’ or a ‘clean’ solution. In fact, this paper shows that producing blue hydrogen is significantly worse than burning fossil fuels for heat, such as gas or coal, in the first place.”
Incorrect assumptions lead to incorrect conclusions

Blue hydrogen and carbon capture and storage is forming a core part of many oil and gas companies energy transition plans as they look to continue to monetise their existing assets in a lower carbon future.

Norwegian giant Equinor is one such player that sees hydrogen playing a key role in the energy transition and is involved in several planned developments, including the proposed Net Carbon Humber development in the UK.

A spokesperson for the company told Upstream that Equinor believes the assumptions used in the study were not correct, which led to incorrect conclusions.


BP signs new agreements to underpin UK blue hydrogen scheme
Read more

The spokesperson pointed Upstream towards a letter by Equinor’s executive vice president Al Cook that was published in The Times newspaper in the UK on the weekend.

In the letter Cook states that Equinor “strongly” disagrees with the claim that blue hydrogen made from natural gas could be worse for the environment than simply burning the gas for fuel.

In particular, he highlights claims in the study that — in the US — 2.6% of gas is lost to the atmosphere during production and transportation, causing climate change.

“The figure for the UK’s largest blue hydrogen project, Zero Carbon Humber, is in fact less than one hundredth of this,” he states.

“Zero Carbon Humber will be powered by gas from Norway, produced with some of the lowest emissions in the world. If the UK is to succeed in reaching net zero we will need all the tools in our toolbox. We should applaud the government’s global leadership on clean hydrogen.”

Blue hydrogen has transitional role

Meanwhile, Upstream was told by a spokesperson for the Hydrogen Council — a chief executive-led coalition of companies around the world — that it is still reviewing the research paper and its methodology.

“Bringing together 120-plus members from across a multitude of sectors, the Hydrogen Council believes that hydrogen technologies have a key role to play in delivering on global net zero goals,” the spokesperson added.

A spokesperson for independent UK advisory the Climate Change Committee (CCC) also told Upstream it had yet to review the details of the report.

However, head of carbon budgets at the CCC, David Joffe, took to twitter last week to hit out at the study, which he claimed represented a case where blue hydrogen “is done really badly and without any sensible regulations”.


Oil and gas emissions could risk 'killing concept of blue hydrogen', warns Equinor vice president
Read more

He also highlighted that zero emission green hydrogen, made using electrolysis powered by renewable energy, would take time, with blue hydrogen able to fill in as a “transitional option” to help grow hydrogen, while reducing emissions.

“If we don’t do that, H2 will be less able to contribute to net zero in the areas where it is important as we won’t have given the demand side time to develop,” Joffe said via Twitter.

Officially, the CCC assumes a 95% CO2 capture rate on blue hydrogen production, which is consistent with what large engineering companies, such as Equinor, say is possible, using autothermal reforming technology.

The CCC’s own analysis finds that blue hydrogen could save up to 85% of emissions compared to unabated use of fossil gas, depending on the emissions footprint of fossil gas production being relatively low.

However, the CCC also only recommends hydrogen use be focused in those areas that cannot feasibly be fully decarbonised through other means, such as electrification, because the emissions reduction from blue hydrogen are still “significantly below 100%".(Copyright)




Tuesday, July 09, 2024

Researchers examine economic effects on technological advancements of blue hydrogen production




 NEWS RELEASE 
UNIVERSITY OF WYOMING



A new analysis by University of Wyoming researchers examines the impacts of current federal economic incentives on large-scale, blue hydrogen production technologies and estimates the expected outcomes in long-term expenses as those hydrogen production pathways evolve.

The research, titled “Technological Evolution of Large-Scale Blue Hydrogen Production Toward the U.S. Hydrogen Energy Earthshot,” was led by Haibo Zhai, the Roy and Caryl Cline Distinguished Chair in Engineering and a professor in the UW College of Engineering and Physical Sciences. The study appears in the journal Nature Communications, a peer-reviewed, open access scientific journal that covers the natural sciences.

Wanying Wu, Zhai’s UW Ph.D. student, was lead author.

Launched in 2021, the U.S. Department of Energy’s (DOE) Energy Earthshots Initiative aims to accelerate breakthroughs of more abundant, affordable and reliable clean energy solutions within the decade by reducing the cost of clean hydrogen production and deployment. The ambitious goal of the program is to reduce production costs of hydrogen by 80 percent to $1 per kilogram of hydrogen in a decade.

The new UW study estimates the economic benefits from learning experience by deploying large-scale blue hydrogen projects; evaluates both the 45Q tax credit for carbon sequestration and 45V tax credit for clean hydrogen production; and compares the credits’ economic role in promoting blue hydrogen production toward the Hydrogen Energy Earthshots Initiative.

“Currently, the cost of hydrogen is high, especially when produced from renewables,” Zhai says. “However, blue hydrogen -- that is, hydrogen produced using fossil fuels and paired with carbon sequestration -- has the potential to significantly reduce the costs of production, substantially lower emissions and support new economic opportunities in line with the goals of the Energy Earthshots Initiative so long as the tax incentives and infrastructure funding remain available to technology developers. This study is an important snapshot of where we are and where we could be in the future while building out clean hydrogen systems.”

The premise is that the more prevalent and advanced, or “experienced,” large-scale blue hydrogen systems become, the more efficient and affordable they will become. However, that is only one piece of the puzzle, Zhai says.

“We apply experience curves to estimate the evolving costs of blue hydrogen production and to further examine the economic effect on technological evolution of the Inflation Reduction Act’s tax credits for carbon sequestration and clean hydrogen,” he explains. “We concluded in our models that the break-even cumulative production capacity required for gas-based blue hydrogen to reach DOE’s $1/kg H2 target is highly dependent on tax credits, natural gas prices, inflation rates, carbon capture uncertainties and learning rates.”

Despite these uncertainties, the study concludes that experience from the deployment of blue hydrogen projects will be helpful in lowering future costs of hydrogen production and will remain cost competitive. Additionally, paired with extended tax incentives for carbon sequestration, costs could be significantly reduced further.

Funding for the study was made possible by the Hydrogen Energy Research Center (H2ERC) in UW’s School of Energy Resources (SER) and is the direct result of the “Hydrogen: Make, Move, Use or Store” initiative that supported UW faculty-led projects investigating topics across all levels of the hydrogen supply chain. Eugene Holubnyak, H2ERC director, also was a collaborative author on the study.

“I feel privileged to have contributed to this important discussion alongside Dr. Zhai and Ms. Wu,” Holubnyak says. “SER has been fortunate to receive support from the state of Wyoming in order to delve into the feasibility of a new hydrogen economy and conduct important research on hydrogen production methods. This study is a wonderful example of that support having a wider impact among the scientific community and will help us to evaluate the most economically competitive pathway forward.”

Thursday, August 12, 2021

WHAT KENNEY AND BIG OIL ARE PROMOTING FOR ALBERTA




Touted as clean, ‘blue’ hydrogen may be worse than gas, coal


Peer-Reviewed Publication

CORNELL UNIVERSITY

ITHACA, N.Y. – “Blue” hydrogen – an energy source that involves a process for making hydrogen by using methane in natural gas – is being lauded as a clean, green energy to help reduce global warming. But Cornell and Stanford University researchers believe it may harm the climate more than burning fossil fuel.

The carbon footprint to create blue hydrogen is more than 20% greater than using either natural gas or coal directly for heat, or about 60% greater than using diesel oil for heat, according to new research published in Energy Science & Engineering.

Robert Howarth, professor of ecology and environmental biology at Cornell, together with Mark Z. Jacobson, professor of civil and environmental engineering at Stanford, authored the report.

Blue hydrogen starts with converting methane to hydrogen and carbon dioxide by using heat, steam and pressure, or gray hydrogen, but goes further to capture some of the carbon dioxide. Once the byproduct carbon dioxide and the other impurities are sequestered, it becomes blue hydrogen, according to the U.S. Department of Energy.

The process to make blue hydrogen takes a large amount of energy, according to the researchers, which is generally provided by burning more natural gas.


“In the past, no effort was made to capture the carbon dioxide byproduct of gray hydrogen, and the greenhouse gas emissions have been huge,” Howarth said. “Now the industry promotes blue hydrogen as a solution, an approach that still uses the methane from natural gas, while attempting to capture the byproduct carbon dioxide. Unfortunately, emissions remain very large.”

Methane is a powerful greenhouse gas, Howarth said. It is more than 100 times stronger as an atmospheric warming agent than carbon dioxide when first emitted. The United Nations’ Intergovernmental Panel on Climate Change report released on Aug. 9 shows that cumulatively to date over the past century, methane has contributed about two-thirds as much to global warming as carbon dioxide has, he said.

Emissions of blue hydrogen are less than for gray hydrogen, but only by about 9% to 12%.

“Blue hydrogen is hardly emissions free,” wrote the researchers. “Blue hydrogen as a strategy only works to the extent it is possible to store carbon dioxide long-term indefinitely into the future without leakage back to the atmosphere.”


On Aug. 10, the U.S. Senate passed its version of the $1 trillion Infrastructure Investment and Jobs Act, which includes several billion dollars to develop, subsidize and strengthen hydrogen technology and its industry.

“Political forces may not have caught up with the science yet,” Howarth said. “Even progressive politicians may not understand for what they’re voting. Blue hydrogen sounds good, sounds modern and sounds like a path to our energy future. It is not.”

An ecologically friendly “green” hydrogen does exist, but it remains a small sector and it has not been commercially realized. Green hydrogen is achieved when water goes through electrolysis (with electricity supplied by solar, wind or hydroelectric power) and the water is separated into hydrogen and oxygen.

“The best hydrogen, the green hydrogen derived from electrolysis – if used wisely and efficiently – can be that path to a sustainable future,” Howarth said. “Blue hydrogen is totally different.”

This research was supported by a grant from the Park Foundation. Howarth is a fellow at the Cornell Atkinson Center for Sustainability.

-30-

Sunday, August 22, 2021

Hydrogen power

Carbon from UK’s blue hydrogen bid still to equal 1m petrol cars

Government’s plan to use ‘blue’ fossil-fuel hydrogen alongside green version raises concern, say campaigners


A hydrogen-hybrid power plant in Germany. The UK plans to use hydrogen technology to replace fossil gas use in factories, refineries and heating. 
Photograph: Bernd Settnik/EPA


Jillian Ambrose Energy correspondent
Sun 22 Aug 2021 17.27 BST

Opting for hydrogen that is made using fossil fuels rather than renewable electricity could create up to 8m tonnes of carbon emissions every year by 2050, according to an analysis of government data.

The figures show that the use of fossil-fuel hydrogen, or “blue hydrogen”, would create the same carbon emissions each year that more than a million petrol cars would produce, compared with using zero-carbon “green hydrogen”.

Ministers plan to use both blue and green hydrogen to replace fossil gas in factories, refineries and heating, but new figures show that an over-reliance on blue hydrogen would still lead to millions of tonnes of carbon emissions entering the atmosphere every year.

Blue hydrogen is extracted from fossil gas in a process that requires carbon capture technology to trap emissions – but this method still fails to capture between 5% and 15% of the CO2. Carbon emissions are also released when the fossil gas is extracted from oil and gas fields.

Using blue hydrogen exclusively to replace fossil gas would result in between 6m and 8m tonnes of carbon dioxide emissions every year from the late 2020s, or the equivalent of running an average of 1.5m more fossil-fuel cars on the road every year by 2050.

If the government used zero-carbon green hydrogen to meet a third of the UK’s forecast hydrogen demand, blue hydrogen would create the same emissions as around 1m cars running on the UK’s roads each year.

The analysis, undertaken on behalf of the Guardian by Friends of the Earth Scotland, was based on government data published last week in a long-awaited report on the future of the UK’s hydrogen economy.

The strategy sets out a “twin track” approach to supporting hydrogen production, but it failed to suggest a balance between blue and green hydrogen. This has raised concerns among climate groups that an over-reliance on blue hydrogen could lock the UK into decades of North Sea gas production, fossil-fuel imports and millions of tonnes of carbon emissions.

Richard Dixon, the director of Friends of the Earth Scotland, said the government’s support for the major oil companies behind plans for blue hydrogen projects, including BP and the Norwegian state oil giant Equinor, would allow them to “prolong fossil-fuel production indefinitely”.

A spokesperson for the Department for Business, Energy and Industrial Strategy, which reviewed the analysis, said investing in both green and blue hydrogen would “allow us to kickstart an entire industry from scratch that creates tens of thousands of jobs and unlocks billions of pounds worth of private investment”.

Quick Guide
What are the hydrogen options?


Hydrogen impact

Hydrogen is considered a crucial tool in the UK government’s plan to cut the country’s emissions to net zero' by 2050. The clean-burning gas could be used to replace fossil gas in factories and refineries, or as a fuel for heavy transport such as shipping, without emitting greenhouse gases.

Although hydrogen itself is a clean fuel, the process of producing hydrogen can be extremely polluting. Most of the world’s hydrogen is produced from fossil gas, and releases millions of tons of carbon emissions every year. There are three main types of hydrogen:

Grey hydrogen
About 98% of the hydrogen used today is known as "grey hydrogen". It is extracted from the methane found in fossil gas, using a process known as steam methane reforming, and releases carbon dioxide emissions into the atmosphere where it contributes to global heating. It is extremely damaging to the environment.

Blue hydrogen
This “low carbon” alternative to grey hydrogen uses carbon capture technology to trap between 85% to 95% of the harmful emissions created by hydrogen production, which could then be transported in pipelines to underground storage facilities such as disused subsea gas caverns under the North Sea. Blue hydrogen is not a net zero fuel because it requires fossil fuel production, which causes emissions and releases up to 15% of the emissions as grey hydrogen.

Green hydrogen
Green hydrogen is made by splitting water molecules using an electrolyser powered by renewable electricity. The only byproduct is oxygen which can be safely released into the air. Renewable energy developers believe giant offshore wind farms could be used to power green hydrogen production, particularly overnight when electricity demand is low.

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“Achieving the scale we need would be more challenging if we just used green hydrogen,” the spokesperson added.

The government’s official climate advisers at the Committee on Climate Change (CCC) have backed the idea of a “blue hydrogen bridge” through the 2030s for areas of the UK economy which would struggle to run on electricity, while the UK uses its renewable electricity to meet the growing demand for electric vehicles and heating.

But David Joffe, the head of carbon budgets at the CCC, warned that the government must begin to rein in the proportion of hydrogen produced from fossil fuels in favour of green hydrogen by the late 2030s to meet its legally binding climate targets.

“Blue hydrogen is not an amazing solution, and we don’t embrace it unreservedly,” he told the Guardian.

Wednesday, September 22, 2021

'MAYBE' TECH
SHELL'S SCOTTFORD REFINERY BLUE HYDROGEN CCS PROJECT

Shell's Quest CCS plant near Edmonton, Canada, which produces 900 tonnes of blue hydrogen per day.
Photo: Shell

Climate impact of blue hydrogen would be similar to green H2 if emissions were minimised: study


Reducing natural-gas leaks in the supply chain and increasing carbon capture rates would allow blue H2 to be a 'bridging technology', says global team of academics

Blue hydrogen — produced from natural gas with carbon capture and storage — can have a similar climate impact to renewable hydrogen, if two key requirements are met, according to a yet-to-be-peer-reviewed scientific study written by 16 researchers from around the world.


“If methane emissions from natural gas supply are low and CO2 capture rates high, blue hydrogen is comparable with green hydrogen in terms of impacts on climate change,” says the report, entitled On the climate impacts of blue hydrogen production.

The study — written by academics based in the UK, the US, Canada, Swizerland, Germany, Italy and the Netherlands — looks at what could feasibly achieved in terms of greenhouse gas (GHG) emissions from blue hydrogen production, in contrast to the recent controversial study that largely used historic data to claim that blue H2 is worse than natural gas for the climate.


“Our LCA [lifecycle assessment] of hydrogen production with CCS shows that the term 'blue hydrogen” as such can only be taken as synonym for ‘low-carbon’ hydrogen if two key requirements are met,” states the report, which has appeared on the pre-publication academic website ChemRxiv.

“First, natural gas supply must be associated with low GHG emissions, which means that natural gas leaks and methane emissions along the entire supply chain, including extraction, storage, and transport, must be minimized.

“Second, [methane] reforming technology with high CO2 capture rates must be employed.”

The report states that current carbon capture technology can “allow removal rates at the hydrogen production plant of above 90%”, pointing out that capture rates of “close to 100% are technically feasible, slightly decreasing energy efficiencies and increasing costs, but have yet to be demonstrated at scale”.

“Our main conclusion is that, if the above requirements are met, blue hydrogen can be close to green hydrogen in terms of impacts on climate change and can thus play an important and complementary role in the transformation towards net-zero economies.

Chart from the study showing how blue hydrogen can just sneak into being comparable with green H2 in terms of climate impact, given low methane emissions and high carbon capture rates. Photo: Report authors/ChemRxiv CARBON CAPTURE IS ANOTHER MAYBE TECHNOLOGY

“In order to be competitive with green hydrogen in terms of climate impacts over the long-term, blue hydrogen should exhibit a life cycle GHG footprint of not more than 2-4 kg CO2 [equivalent per] kg. This is only possible with high CO2 removal rates [of 93%, using autothermal reforming] and methane emission rates below about 1% (GWP100) or 0.3% (GWP20).” [see panel below for explanation of GWP]

Part of this assessment is based on the assumption that “no single hydrogen production technology (including electrolysis with renewables) is completely net-zero in terms of GHG emissions over its life cycle and will therefore need additional GHG removal from the atmosphere to comply with strict net-zero targets.”

Presumably, this is a reference to greenhouse gases emitted in the process of producing, transporting and installing solar panels, wind turbines and batteries — although this is not explicitly addressed in the study.

The report states that one shale gas production region in the US has achieved methane emission rates “as low as 0.3-0.4%”, while in Norway, the UK and the Netherlands, “natural gas supply chains have emission rates typically below 0.5%”.

It adds that gas exporters such as Russia, Algeria and Libya have methane emission rates “around or significantly higher than 2%”.

The authors do concede, however, that “there is a very large uncertainty on these emissions, which needs to be urgently addressed by improved measurement, reporting, and disclosure”.

While the report states that “green hydrogen should be preferred [to blue]”, it explains: “Given the short- to medium-term capacity of green hydrogen, blue hydrogen can play a role as a bridging technology supporting the uptake of hydrogen infrastructure and hydrogen end-use transformation.”(Copyright)
GWP20 V GWP100


GWP100 and GWP20 refer to the global warming potential (ie, climate impact] over a 100-year-period and over a 20-year period. Methane is 84-87 times more powerful a greenhouse gas than carbon dioxide over 20 years, but only 28-36 times stronger over the course of a century.

Therefore, dramatically different conclusions can be reached depending on which GWP scenario is used.