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Category: sustainability – Page 64

AI model improves 4D STEM imaging for delicate materials

Researchers at Monash University have developed an artificial intelligence (AI) model that significantly improves the accuracy of four-dimensional scanning transmission electron microscopy (4D STEM) images.

Called unsupervised deep denoising, this model could be a game-changer for studying materials that are easily damaged during imaging, like those used in batteries and .

The research from Monash University’s School of Physics and Astronomy, and the Monash Center of Electron Microscopy, presents a novel machine learning method for denoising large electron microscopy datasets. The study was published in npj Computational Materials.

New Assessment Reveals Plants Absorb 31% More CO2 Than Previously Estimated

How much carbon dioxide (CO2) do plants absorb from the atmosphere? This is what a recent study published in Nature hopes to address as a team of researchers investigated what’s known as the Terrestrial Gross Primary Product (GPP), which measures the amount of CO2 that photosynthesis removes from the atmosphere. This study holds the potential to help researchers, climate scientists, legislators, and the public better understand the role that plants play in reducing carbon emissions, along with mitigating the effects of climate change worldwide.

“Figuring out how much CO2 plants fix each year is a conundrum that scientists have been working on for a while,” said Dr. Lianhong Gu, who is a distinguished research scientist at the Oak Ridge National Laboratory (ORNL) and a co-author on the study. “The original estimate of 120 petagrams per year was established in the 1980s, and it stuck as we tried to figure out a new approach. It’s important that we get a good handle on global GPP since that initial land carbon uptake affects the rest of our representations of Earth’s carbon cycle.”

Petagrams are the standard measurement used for GPP, with one petagram equaling 1 billion metric tons, and the latter being the amount of CO2 discharged from the total number of gas-powered passenger vehicles in the world, which is approximately 1.4 billion.

Alight, 3Flash to build 120 MW solar park in Finland

Sweden’s Alight and Finland’s 3Flash have entered into a joint development agreement to build a 120 MW solar park in Loviisa, a town in southeastern Finland.

Construction is expected to begin early next year, with commissioning currently scheduled for 2027. Once completed, it is expected to generate 155 GWh, equivalent to the annual electricity needs of 31,000 households.

Data centers could be used as residual power generators as researchers generate 500MWh in a year from a single DC by recycling wasted wind

HVAC systems common in data centers expel warm air outdoors, creating a consistent, untapped wind resource that can be converted into electricity. In a case study of a Colombian data center, the researchers used vertical axis Tesup V7 wind turbines to capture this man-made waste wind. The turbines, installed atop chillers, were chosen because they minimized size and weight while maximizing electricity generation.

The amount of gross electricity produced annually by six wind turbines was 513.82MWh from artificial airflow, exceeding the energy consumption of the facility’s fans, and providing a surplus of 131.2MWh. The authors suggest this recycled energy can be used for other electrical needs within the data center or be injected into the electrical grid.

The study, published in the journal Scientific Reports, also highlighted the economic and environmental benefits. A positive cash flow is achieved by the third year, with an impressive internal rate of return of 50.69%. Environmentally, the system reduces CO2 emissions by approximately 300 metric tons annually.

Finding Could Help Turn Trees Into Affordable, Greener Industrial Chemicals

Lignin, a…

Trees are the most abundant natural resource living on Earth’s land masses, and North Carolina State University scientists and engineers are making headway in finding ways to use them as sustainable, environmentally benign alternatives to producing industrial chemicals from petroleum.

Lignin, a polymer that makes trees rigid and resistant to degradation, has proven problematic. Now those NC State researchers know why: They’ve identified the specific molecular property of lignin — its methoxy content — that determines just how hard, or easy, it would be to use microbial fermentation to turn trees and other plants into industrial chemicals.

The findings put us a step closer to making industrial chemicals from trees as an economically and environmentally sustainable alternative to chemicals derived from petroleum, said Robert Kelly, the corresponding author of a paper in the journal Science Advances detailing the discovery.

All electric without batteries: Are flow batteries the future of EVs?

A flow battery, also known as a reduction-oxidation (Redox) flow battery, is an electrochemical cell that uses two moving liquid electrolytes to generate electricity.

Ion transfer occurs across the cell membrane, accompanied by current flow through an external circuit, while the liquids circulate in their respective spaces. The liquids required are stored in separate tanks until required.

Flow batteries have existed for some time, but earlier versions had low energy density, making them impractical for cars. However, recent advancements in the technology have improved energy density, making it increasingly viable for long-duration energy storage and potentially for electric vehicles.

Various types of flow batteries, including inorganic and organic forms, have been demonstrated. Flow battery design can be classified into full flow, semi-flow, and membranesless variants.

Engineers develop scalable process to decarbonize cement production

Researchers from UCLA’s Institute for Carbon Management have developed a method that could eliminate nearly all of of the carbon dioxide emitted during the process of cement production, which accounts for about 8% of global atmospheric CO2 emissions.

In a new study published in ACS Sustainable Chemistry & Engineering, the researchers describe how the new approach could be easily incorporated into existing cement-production processes, providing a more affordable alternative to existing solutions to decarbonize the industry.

Space Force funds $35M institute for versatile propulsion at U-M

This sounds very promising! The researchers are investigating the use of nuclear microreactors to power faster and more efficient electric propulsion systems.☢️🚀

To develop spacecraft that can “maneuver without regret,” the U.S. Space Force is providing $35 million to a national research team led by the University of Michigan. It will be the first to bring fast chemical rockets together with efficient electric propulsion powered by a nuclear microreactor.

The newly formed Space Power and Propulsion for Agility, Responsiveness and Resilience Institute involves eight universities, and 14 industry partners and advisers in one of the nation’s largest efforts to advance space power and propulsion, a critical need for national defense and space exploration.

Right now, most spacecraft propulsion comes in one of two flavors: chemical rockets, which provide a lot of thrust but burn through fuel quickly, or electric propulsion powered by solar panels, which is slow and cumbersome but fuel efficient. Chemical propulsion comes with the highest risk of regret, as fuel is limited. But in some situations, such as when a collision is imminent, speed may be necessary.