ripple effect

UH team develops method to use electricity to remove harmful carbon from ocean waters

UH assistant professor Mim Rahimi published a paper on the development of his lab's emerging negative emissions technology known as electrochemical direct ocean capture. Photo via UH.edu

Researchers at the University of Houston are developing a new, cost-effective way to help rid oceans of harmful carbon dioxide and fight the effects of climate change.

UH assistant professor Mim Rahimi published a paper on the development of his lab's emerging negative emissions technology known as electrochemical direct ocean capture (eDOC) in the journal Energy & Environmental Science this month.

The paper details how Rahimi's team is working to create electrochemical tubes to remove dissolved inorganic carbon from synthetic seawater, according to a release from UH. The process aims to amplify the ocean’s ability to absorb carbon and can easily be integrated into existing on-shore and off-shore infrastructure, including desalination plants and oil rigs.

Unlike other methods that involve complex processes, expensive materials and specialized membranes, the eDOC method focuses on adjusting the ocean water's acidity using affordable electrodes.

“While eDOC won’t single-handedly turn the tide on climate change, it enriches our mitigation toolkit,” Rahimi said in a statement. “In this global challenge, every innovative approach becomes invaluable.”

Rahimi's research is funded by a $250,000 grant from the U.S. Department of Energy and preliminary research was sponsored by UH Energy’s Center for Carbon Management in Energy.

“The promise of eDOC is undeniable, but scaling it, optimizing costs and achieving peak efficiency remain challenges we’re actively addressing,” he added in a statement.

Late last month, UH shared details on another carbon removal project it is involved with–this time focused on direct air capture (DAC). Known as the Pelican Gulf Coast Carbon Removal study–led by Louisiana State University and including UH and Shell—the project looks at the feasibility of a DAC hub that would pull carbon dioxide from the air and either store it in deep geological formations or use it to manufacture various products, such as concrete.

In August, UH announced that the project received nearly $4.9 million in grants, including almost $3 million from the U.S. Department of Energy. Click here to read more.

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A View From HETI

The USDA has announced a $1.4 billion investment to transition San Miguel Electric Cooperative in rural South Texas to a 600-megawatt solar and battery energy system, aiming to reduce climate pollution and create jobs by 2027.

The United States Department of Agriculture recently announced that San Miguel Electric Cooperative Inc., located in Christine, Texas, in Atascosa County, just outside of San Antonio, will transition its operations to produce 600 megawatts of energy using solar panels and a battery energy storage system (BESS).

The project is expected to reduce climate pollution by 1.8 tons annually, equivalent to removing 446,000 cars from the road each year, says USDA.

The project with the San Miguel Electric Cooperative plans to use more than $1.4 billion investment to procure 600 megawatts of renewable energy through solar voltaic panels and a battery energy storage system to power 47 counties across rural South Texas. The clean project also hopes to support as many as 600 jobs.

This is part of the over $4.37 billion in clean energy investments through the United States Department of Agriculture’s (USDA) Empowering Rural America (New ERA) Program, which has rural electric cooperatives supporting the economy via job creation, lowering electricity costs for businesses and families and reducing climate pollution. The New ERA was made possible by President Joe Biden’s Inflation Reduction Act, which was the largest investment in rural electrification since President Franklin Delano Roosevelt signed the Rural Electrification Act into law in 1936.

San Miguel plans to convert its operations to a 400-megawatt solar generation facility and 200-megawatt battery storage facility, and the transition should be complete by 2027. Currently, San Miguel produces 391 megawatts of electricity through a contract with South Texas Electric Cooperative (STEC).

“USDA is committed to enhancing the quality of life and improving air and water in our rural communities,” Secretary Tom Vilsack says in a news release. “The Inflation Reduction Act’s historic investments enable USDA to partner with rural electric cooperatives to strengthen America’s energy security and lower electricity bills for hardworking families, farmers and small business owners.”

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