Tuesday, March 21, 2023

Novel catalyst for highly selective photoelectroreduction of carbon dioxide to ethanol

Novel catalyst for highly selective photoelectroreduction of carbon dioxide to ethanol
Schematic diagram for highly selective photoelectroreduction of carbon dioxide over
 graphene/silicon carbide composites. Credit: SARI

Artificial photosynthesis (AP), using sunlight to produce valuable chemicals and fuels from carbon dioxide (CO2), is a promising strategy to achieve solar energy storage as well as negative carbon cycle.

However,  is quite complex and involves multiple sequential and parallel steps. What's more, thermodynamically favorable C1 products can be produced from multiple AP intermediates, making it challenging to selectively produce target chemicals containing C-C bonds.

Recently, a research team led by Profs. Chen Wei and Wei Wei from the Shanghai Advanced Research Institute (SARI) of the Chinese Academy of Sciences has developed novel graphene/ (SiC) catalysts for efficient CO2 photoelectroreduction to ethanol (C2H5OH).

The results were published in Angewandte Chemie International Edition.

The proposed composite catalyst, which comprises SiC substrate, interfacial layer (IL), and few-layer graphene overlayer, can help to achieve the precise control of active intermediates for C-C coupling.

An optimal IL structure allows photogenerated electrons from the SiC substrate to be facilely transferred to the  on the graphene overlayer. Reaction intermediates can then be efficiently formed and stabilized owing to their strong adsorption at the active sites and the high electron density of the graphene surface.

The researchers found that CH3OH formation was largely suppressed in favor of C-C coupling. C2H5OH was therefore exclusively generated with a selectivity of >99% and a CO2 conversion rate of 17.1mmol gcat-1h-1 under simulated solar irradiation with a small bias (-50 mV bias vs. Ag/AgCl) and ambient conditions.

Thus, the photoelectrocatalytic performance of the optimal catalyst in producing C2 products from CO2 was at least two orders of magnitude higher than those of the state-of-the-art AP catalysts.

More information: Guanghui Feng et al, Highly Selective Photoelectroreduction of Carbon Dioxide to Ethanol over Graphene/Silicon Carbide Composites, Angewandte Chemie International Edition (2023). DOI: 10.1002/anie.202218664


Journal information: Angewandte Chemie International Edition 


Provided by Chinese Academy of Sciences Synergistic interplay mechanism of dual active sites on bimetallic oxide for syngas conversion

ONTARIO

Algoma U Faculty Call Out Sheehan and Romano On Steel Plant Emission

By
 Content Team
 - SAULT ST. MARIE 




A letter issued by the faculty members of Algoma University have joined to call out the Sault Ste. Marie MP and MPP concerning high levels of pollutants from Algoma Steel.  Here is the full context of the letter issued to media.

Open Letter, Urgent Action: Revoke Pollution Regulation Exemptions for
Algoma Steel Inc.

Dear Mr. Sheehan and Mr. Romano,

We, the undersigned full-time faculty members at Algoma University, write to urgently request your intervention regarding the hazardous high levels of specific carcinogenic emissions by Algoma Steel Inc. in Sault Ste. Marie, Ontario. According to the recent report by the National Observer published March 15, 2023, the steel mill has been releasing excessive amounts of benzene and particulate matter, leading to serious health and environmental concerns for the residents of the surrounding communities.

The report states that the emissions of benzene, a known carcinogen, have exceeded the acceptable limits set by the provincial government. The levels of sulfur dioxide, which is harmful to the respiratory system and can cause asthma and other respiratory diseases, have also been found to be dangerously high.

In addition, the emissions of particulate matter, which can cause lung cancer and heart disease, have been consistently above the legal limit for several years. These pollutants are not only harmful to the health of the people living in the vicinity of the steel mill but also to the ecosystem and the environment.

It is deeply concerning to see that despite the existence of regulations, the Algoma Steel mill has been allowed to operate in a manner that is harmful to the health and well-being of the people living in the local area. This has been going on for far too long, and it is time for the government to take immediate action to enforce the regulations that are in place.

It is crucial to acknowledge that health care resources in the Algoma District may not be as accessible as desired. Vital equipment and services for early cancer detection and treatment are more readily available in larger urban centers, such as Sudbury or cities in southern Ontario.

This inequality in health care resources, combined with emissions from the Algoma Steel mill and the pressing need for more stringent regulatory enforcement, presents a significant economic challenge for the city of Sault Ste. Marie. Moreover, these factors contribute to growing concerns about the well-being and health of the local population.
As a responsible government, it is your duty to protect the health and safety of the citizens of Ontario and Canada and to ensure that nature is preserved for future generations. The chronically high emissions of carcinogens and harmful pollutants released by the Algoma Steel into the environment mill are unacceptable, and urgent action must be taken to address this issue.

We urge you to take the necessary steps to enforce regulations and hold Algoma Steel Inc. accountable for its actions. The people of Ontario and of Canada have the right to breathe clean air and drink clean water (e.g., Canadian Environmental Protection Act (CEPA) (1999), The Clean Water Act (2006) in Ontario, Ontario Water Resources Act (OWRA), The Ontario Environmental Protection Act (EPA)), and it is your responsibility to ensure that this is the case.

Thank you for your prompt attention to this critical matter. We look forward to your response and the actions you will take to address this issue.


Sincerely,
Dr. Arthur Perlini, Department of Psychology
Dr. Edward Turgeon, Department of Visual Art and Music
Dr. Anne Turgeon, Department of Visual Art and Music
Dr. Pedro M. Antunes, Department of Biology
Dr. Nicola Shaw, Department of Biology
Dr. David Brodbeck, Department of Psychology
Dr. Paulette Steeves, Department of Geography, Geology and Land Stewardship
Dr. Rose Ann Torres, School of Social Work
Dr. Dionisio Nyaga, School of Social Work
Dr. Isabel Molina, Department of Biology
Dr. Walter Wai Tak Chan, School of Social Work
Dr. Nusrate Aziz, Faculty of Business and Economics
Dr. Jody-Lynn Rebek, Faculty of Business and Economics
Dr. Aaron Gordon, Faculty of Business and Economics
Dr. Sean Meades, Department of Community Economic and Social Development
Dr. Andrea Pinheiro, Department of Visual Arts and Music
Dr. Nairne Cameron, Department of Geography, Geology, and Land Stewardship
Dr. Tony Robinson-Smith, Department of English & History
Dr. Ushnish Sengupta, Department of Community Economic and Social Development
Dr. Suleyman M. Demi, School of School Work
Dr. Nirosha Murugan, Department of Biology
Dr. Jennifer Foote, Department of Biology
Dr. Laura Wyper, Department of Community Economic and Social Development
Dr. Christine Madliger, Department of Biology

Dr. Teryn Bruni, Department of Psychology
Dr. Simon Xu, School of Computer Science and Technology
Dr. Andrew Judge, Anishinaabe Studies
Dr. Chunhua Zhang, Department of Biology
Dr. Bill Dew, Department of Biology
Dr. Trevor Tchir, Department of Law and Politics
Dr. Vivian Jiménez-Estrada, Department of Sociology-Anthropology
Dr. Dwayne Keough, Department of Psychology
Dr. Mahbubul Alam, Faculty of Business and Economics
Dr. Paul Dupuis, Department of Psychology
Dr. Linda Burnett, Department of English & History
Dr. Sheila Gruner, Department of Community Economic and Social Development (CESD)
Dr. Chantal Lemieux, Department of Psychology
Dr. Alice Ridout, Department of English and Histor

 SASKATCHEWAN

Library workers seeing rise in violent incidents according to survey

Prince Albert Library. (File photo/paNOW Staff)
SAFE LIBRARIES
Mar 20, 2023 | 2:00 PM

Are libraries in Saskatchewan safe places for employees and patrons? A new survey is turning the page on that question with alarming data.

The results of the survey, conducted last year, were released by CUPE Saskatchewan on Thursday and show a majority of respondents have experienced or witnessed violence in the workplace.

Of those who responded to the survey, 78 per cent reported verbal abuse, 71 per cent reported witnessing violence, and 44 per cent experienced sexual harassment.

While the data was largely taken from libraries in Saskatoon and Regina, President of CUPE Saskatchewan Judy Henley said it is happening everywhere.

“It’s actually happening right across Canada; it’s not unique to Saskatchewan,” she said.

Henley noted with mental health, addictions, and homelessness becoming a growing concern in many parts of the province, staff have seen more aggressive behaviour in recent years.

“Mental health is on the rise, homelessness is on the rise, everything is on the rise and libraries are sometimes a place where people go to because it’s a warm place and a safe place,” she said. “What used to be a quiet place is no longer a quiet place.”

The survey looked at various levels of violence and harassment and exactly who is committing these acts. The results showed that a large number of cases involved a library patron or member of the public.

(CUPE Saskatchewan)

Many of the incidents involved threats of physical harm to an employee or being struck with an object.

However, about 36 per cent of those employees polled said they have not experienced a violent act over the past year.

(CUPE Saskatchewan)

paNOW reached out to several library networks including the Prince Albert Library Board, Wapiti, and Lakeland. The Lakeland Regional Library network responded by saying while it is aware of incidents in other libraries in the province, they have not seen an increase in such incidents in the past year.

“While those stories were very troubling, Lakeland Library Region has not experienced anything comparable at any of our library branches,” Executive Director Jake Marion said in a statement.

Henley though, believes many libraries are experiencing this level of harassment, and it not only puts workers in danger but patrons.

“If workers are not safe, this could adversely affect the public that are coming in to use the service. It’s not just about workers, it’s about keeping libraries safe for everybody,” she said.

As part of the report, CUPE also unveiled a number of recommendations for preventing these incidents in the future including violence prevention training, expanded union education, onsite social workers and Elders and bargaining for new provisions in collective agreements.

derek.craddock@pattisonmedia.com

Twitter: @PA_Craddock


 British Columbia

Student innovation helps Fraser Valley farmers tackle weighty plastic problem

Canada produces 62,000 tonnes of agricultural plastic

 yearly, with B.C. contributing nearly 4,200 tonnes

Eight men wearing rubber boots and other farmers' clothing stand in front of a large pile of bundled plastic
Gerald Struys says farmers in Agassiz are working to reach a net zero carbon emission goal by 2050. (Provided by Gerald Struys)

Farmers in Agassiz, B.C. finally have a solution to their thousand-tonne problem. 

Agassiz farmer Gerald Struys says farms in the area accumulate about 1,200 to 1,400 tonnes of agricultural plastic every year — about the equivalent of 350 Asian elephants.

"It's important to find a way to recycle [the plastic] because just dumping in a landfill isn't doing any good," said Struys, who is also the chair of the Kent Ag Plastics society. 

Agricultural plastic includes bale wrap and bunker covers used to preserve feed for farm animals. According to non-profit organization Cleanfarms, Canada produces nearly 62,000 tonnes each year, including 4,200 tonnes in B.C. 

After multiple hurdles, Struys says local farmers are now able to easily handle and recycle their plastic, thanks to innovations from some University of the Fraser Valley (UFV) students and Cleanfarms. 

"They've really been the go-getters for getting [the solution] going and keeping it going," he said.

Struys and other B.C. farmers now hope other communities will be inspired to tackle their plastic problem through community and youth engagement. 

"If we can do this instead of just dumping it or burning it, that would help get to our net zero [goal]," Struys said. 

Dairy Farmers of Canada has a goal to reach net zero carbon emissions by 2050. 

An open doorway to a barn shows stacks of green and white plastic sheets compressed into cubes and wrapped together with strings.
Farmers in Agassiz B.C. say they produce 1,200 to 1,400 tonnes of agricultural plastic per year. (Gerald Struys)

Creating a solution

In the spring of 2022, Cleanfarms, an organization focused on helping Canadian farmers reduce waste, provided Agassiz's farmers with a single compactor. Compactors help farmers compress large plastics for easier transport and recycling. 

But soon, one compactor wasn't enough and a team of UFV students was brought on to create a new one from scratch. 

Pierce Stoeckly, a UFV technician who initiated the project, explained that agricultural plastic is often big, light and very fluffy, making it difficult to transport to recycling depots. 

"The biggest problem is how to increase the weight," he said.

"Our students did a bit of research … and came up with a design in-house … that will compact the plastic to about a 500-kilogram bale."

Stoeckly said the students were able to test their compactor a few weeks ago at the community's biannual plastic collection day. 

They compressed nearly 70 bales of plastic in 10 hours, and then Cleanfarms helped transport it to a recycling depot. 

Once there, the plastic is turned into pellets to make fence posts and patio planks, according to Struys. 

"We really put [the machine] through its paces and based on the information we learned there, [students] are going to make a few slight modifications," Stoeckly said.

Two young people work in a large, industrial shop. The students are loading a large metal compactor with plastic.
University of Fraser Valley students helped create a recycling compactor from scratch and did a test run in Agassiz, B.C. (Pierce Stoeckly)

'Icing on the cake'

Struys says the community was happy to see youth interested in resolving the farmers' problem. He hopes this will encourage other farmers in the area to consider recycling their plastics. 

"We're going to be contacting the rest of the farms to see if they would be willing to get on board … because in the long run it's keeping [the plastic] out of the landfill," Struys said, adding the community has recycled nearly 700 tonnes of plastic in the past year. 

For the folks at Cleanfarms, this type of community engagement is what they hope to see happen across the country with other farming communities. 

"It's really unique how the farmers engaged a university," said Kim Timmer, director of stakeholder relations and policy at Cleanfarms. 

"Getting students involved, it's really icing on the cake, because now the next generation is learning about different aspects of farming."

Cleanfarms is working to send at least one compactor to each farming community in Canada, with Agassiz in line to receive 10 more to reduce potential biohazard issues and any transfer of disease from farm to farm. 

Where do your old clothes go? Nelson thrift store struggling to keep donations out of landfill

Positive Apparel Thrift Store employees load a semi-trailer with bags of old clothes, which every three weeks makes deliveries from Nelson to a recycling facility in Vancouver. There is nowhere in the Kootenays to recycle textiles. Photo: Tyler Harper

Positive Apparel Thrift Store employees load a semi-trailer with bags of old clothes, which every three weeks makes deliveries from Nelson to a recycling facility in Vancouver. There is nowhere in the Kootenays to recycle textiles. Photo: Tyler Harper


Positive Apparel sends a semi-trailer packed with clothing every month to be recycled on the coast


Every three weeks, a crew of nine people gather outside a Nelson thrift store. They form a chain, and over several hours fill a semi-trailer to capacity with bags of clothes.

Stained shirts, pants with worn-out knees, jackets with broken zippers, the bags are packed with clothes that are either ruined in some way or have simply gone out of fashion.

Once the trailer is loaded, the clothes are sent to a recycling centre in Vancouver where they are cleaned, sorted, shipped overseas or repurposed.


Better there than a landfill according to Positive Apparel owners Simone Varey and Aviva Keely, who for over a decade have tried and failed to find a local recycling solution to the thousands of pounds of old clothing Kootenay residents no longer want.

“Look at this,” Varey says as she points at a storage room that’s overflowing with bags. “Imagine this in our dump, in our landfills.”

Over the last 13 years, Keely says Positive Apparel has diverted nearly 300,000 pounds of waste textiles from the Grohman Narrows Transfer Station located just outside Nelson.

The material is sent to the Lower Mainland, where B.C.’s only dedicated textile recycling facilities are located. The clothes are washed and sorted, then either resold, made into rags or sent overseas.

It’s a costly endeavour for Positive Apparel. The store spends approximately $5,700 monthly to rent extra storage space, pick up clothes from other thrift stores and charities throughout the West Kootenay, rent the semi-trailer and make its delivery to Vancouver. Typically they do the trip once every three weeks, or sometimes twice monthly in the summer.

The effort gives Positive Apparel first pick of clothing for its store, but the majority of material isn’t anything customers would buy. The store is only paid between 10 and 15 cents per pound sent to Vancouver, and they need to make 10 trips annually to break even. The company they work with is also willing to take items such as shoes, belts and purses, but it doesn’t pay for them.

“The profit margin in this industry is tiny,” says Varey. “People think, ‘oh you get everything for free, you must make gobs of money.’”

Keely wants to see that material stay in the West Kootenay.


A decade ago, Positive Apparel briefly set up a non-profit organization and local facility that would have repurposed textiles into stuffing for pillows and couches. Anything with natural fibres could have been used to grow mushrooms. But just three months into the endeavour a trailer carrying their stock flipped on the highway, and the ensuing costs ended their plan before it could begin

Ideally, Keely says, a textile recycling facility would be operated by local governments. She says it could be set up for shredding, with materials used as rags, blankets, landscape cloth or for futons and upholstery.

“This is obviously a resource. We’re not using this resource at all, we’re sending this resource away.”

Positive Apparel owners Aviva Keely (left) and Simone Varey gesture toward a pile of clothing waiting to be recycled. The amount is a fraction of what the thrift store collects from donations in the West Kootenay. Photo: Tyler Harper

Positive Apparel owners Aviva Keely (left) and Simone Varey gesture toward a pile of clothing waiting to be recycled. The amount is a fraction of what the thrift store collects from donations in the West Kootenay. Photo: Tyler Harper

Keely said the store had previously approached the RDCK about expanding into textile recycling, but felt there was no interest.

That could change in the near future.

Amy Wilson, the RDCK’s resource recovery manager, was surprised to hear how much material Positive Apparel is diverting from the transfer station. She said the district’s sustainability department staff had already planned to attend a workshop later this month on circular economies, in which resources are reused locally, with textiles as a focus.

The workshop is being run by the B.C. organization Textile Lab For Circularity (TLC), which advocates for the elimination of textiles from landfills.

TLC managing director Tracy Lydiatt says clothing sent to textile recycling facilities doesn’t necessarily keep it out of landfills. Some of it is shipped overseas to secondary markets, where if it is soiled or damaged it is burned or buried in landfills.

“What happens to those materials when they’re actually processed? Some of them are ragged. Some of them are sold to foreign markets and the rest, unfortunately, I think goes to energy recovery.”

There are three obstacles to growing textile recycling in B.C., according to Lydiatt.

The first is a lack of a provincial ban on textiles in landfills. Do that, she says, and it will spark innovative solutions to textile recycling.

There’s also a lack of political funding and will to take on textile recycling. Lydiatt said she’s been told by provincial officials that the public’s focus right now is on plastics.

“We feel like textiles is hopefully simmering underneath the surface. Some optimistic folks say it’ll be two to three years and some say like [five to 10 years] before the province puts that legislation in place.”

Finally, textile recycling is a logistics problem. Shipping material to facilities is one hurdle, but right now most of the sorting work isn’t automated and is labour intensive. That’s complicated by the fact not every material is easy to recycle. A cotton shirt is easier to shred than stretchy yoga pants.

Lydiatt says she believes the public has good intentions for their clothing, which is why so much of it is donated instead of being tossed away. But that’s also part of what she calls wishcycling. People give away clothing hoping it goes to a place it will be used, without a thought for what happens next.

“The problem is they like holding on to jeans and old Gore-Tex jackets and literally have half a closet full of stuff because they know enough that they don’t want it to go to landfill. There’s also no viable solution for them yet to have it fully recycled.”

So the shirt that didn’t match what it looked like online, the jacket a child outgrew or the pants that became a little too tight end up with thrift stores like Positive Apparel.

Keely says her store will keep taking donations, but the public’s reliance on thrift stores to keep clothing out of landfills isn’t sustainable.

“Fundamentally the issue is out of sight, out of mind, which is why people donate.”

READ MORE:

• Tiny B.C. island community’s answer to climate change? Feed everyone

• Rise and fall of Canada’s domestic PPE market blamed on government policy

• Groups want plastic waste reduced at the source as B.C. expands recycling list

@tyler_harper | tyler.harper@nelsonstar.com

USA, Indonesia announce partnership on SMRs

20 March 2023


The USA and Indonesia have announced a strategic partnership to help Indonesia develop its nuclear energy programme, supporting Indonesia's interest in deploying small modular reactor (SMR) technology to meet its energy security and climate goals.

The signing of the agreement (Image: US Embassy in Jakarta)

A Memorandum of Agreement, as well as affiliated grants and contracts, was signed during the Indo-Pacific Business Dialogue in Bali, Indonesia. The agreement advances the goals of the Just Energy Transition Partnership (JETP) and will strengthen Indonesia's leadership in the ASEAN region on the deployment of advanced, safe and secure nuclear energy technologies, working toward the goal of net-zero emissions in Indonesia by 2060.

Under the agreement, the US Trade and Development Agency (USTDA) has awarded a grant to PLN Indonesia Power to provide assistance to assess the technical and economic viability of a proposed nuclear power plant, to be located in West Kalimantan. It will include a site selection plan, power plant and interconnection system design, preliminary environmental and social impact assessment, risk assessment, cost estimate and regulatory review.

Indonesia Power selected NuScale Power to carry out the assistance in partnership with a subsidiary of Fluor Corporation and Japan's JGC Corporation. The proposed 462 MWe facility would utilise NuScale's SMR technology.

In addition, cooperation will include USD1 million in new funding for capacity-building for Indonesia, building on its existing partnership under the US Department of State Foundational Infrastructure for the Responsible Use of SMR Technology (FIRST) Program. This includes support in areas such as workforce development, stakeholder engagement, regulations and licensing.

"This project will advance climate action and clean energy access throughout a critical part of the world and has the potential - as part of follow-on projects - to create thousands of jobs, pave the way for additional SMR projects in Indonesia and the Indo-Pacific region, and uphold the highest standards for nuclear safety, security, and non-proliferation," the US Embassy in Jakarta said.

"Indonesia has demonstrated a strong interest in partnering with the United States on its energy transition and identifying innovative and groundbreaking US technology to advance its goals," said USTDA's Director Enoh Ebong "USTDA has a unique, catalytic role in advancing the development of some of the most ambitious and noteworthy infrastructure projects in Indonesia and emerging economies around the globe."

NuScale President and CEO John Hopkins said: "In addition to providing our innovative small modular reactor technology to countries like Indonesia that are seeking reliable, zero-carbon baseload power, NuScale continues to support the US government in strengthening relationships abroad through clean energy. NuScale VOYGR SMR power plants are poised for the energy transition and will reinforce energy security for years to come."

The VOYGR plant is based on the NuScale Power Module, a pressurised water reactor with all the components for steam generation and heat exchange incorporated into a single unit, generating 77 MWe, which is the first SMR design to receive approval from the US Nuclear Regulatory Commission. NuScale offers VOYGR plants in 12, four and six-module configurations.

"After 78 years of waiting, now is the time to achieve self-sufficiency in emission-free green energy," said Indonesia Power President Edwin Nugraha Putra. "Through cooperation on technical assistance for the development of a small modular reactor, Indonesia Power, the National Research and Innovation Agency of Indonesia, and NuScale, with support from USTDA, the Coordinating Ministry for Economic Affairs of the Republic of Indonesia and PT PLN (Persero), have opened the gates to a new era of nuclear energy for electricity to light up Indonesia."

In August 2019, Indonesia's National Atomic Energy Agency (Batan) signed a Memorandum of Understanding with utility Indonesia Power to cooperate in the use of nuclear technology in the energy sector. One area of cooperation will be a feasibility study on the use of nuclear power plants.

Researched and written by World Nuclear News