seeing green

Houston researchers launch 2 nature-based carbon credit projects

Both projects will seek to develop “tracking and evaluation systems for the emerging nature-based carbon credit market.” Photo via Getty Images

A team at Rice University has announced plans for two research projects that will focus on nature-based carbon credits.

The George R. Brown School of Engineering and the Severe Storm Prediction, Education and Evacuation from Disasters (SSPEED) Center reported that the projects will be funded through a gift from Emissions Reduction Corp. with the goal of advancing global decarbonization through a series of carbon sequestration, avoidance and reduction projects.

Both projects will seek to develop “tracking and evaluation systems for the emerging nature-based carbon credit market” according to a news release.

“The Rice School of Engineering is very interested in research into nature-based engineering solutions,” Luay Nakhleh, the William and Stephanie Sick Dean of Engineering and a professor of computer science and biosciences at Rice, says in the release. “For too long, we have used nature as a platform but not as a partner. This research will hopefully open the door on a new era of nature-based engineering. Moreover, this is a very timely initiative as bringing science to bear on the emergent carbon credit economy is of critical importance to meeting the challenges of a changing climate.”

For the first project, which is expected to take six months, the SSPEED Center will be commissioning the design of a digital monitoring, reporting and verification (dMRV) system for tracking nature-based carbon credits using satellite and drone imagery to monitor coastal blue carbon projects, soil, and forest projects.

The direct input of this data into blockchain and other record-keeping technologies will be the main part of the system. .A Houston-based local nonprofit carbon registry BC Carbon, and blockchain provider Change Code will also take part in the research.

The second project will see the SSPEED Center undertake hydrologic computer modeling, and take 12 to 18 months to complete. This will help determine the effectiveness of restoring native prairie grasslands as a flood control technique where a portion of the Brazos River will be modeled relative to predict increases in the frequency of “100-year floods” via climate change. Overall, it will evaluate whether prairie restoration funded via soil carbon credits could mitigate flooding risk, which could eliminate the need to raise the 30 miles of levees in Fort Bend County downstream of the carbon project. The George Foundation,BCarbon, and Fort Bend County Flood Control District will work together on this project.

“Using nature to solve flooding problems has been discussed but seldom executed at the level of a major river system,” Herman Brown Professor of Engineering and SSPEED Center director at Rice Phillip Bedient adds. “We are excited that carbon credits and prairie restoration might break open this nature-based flood engineering area.”

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A View From HETI

Simon M. King, a Rice University sophomore, served as the first author on a recent study of a new process for recycling lithium-ion batteries. Photo courtesy Rice

Rice University researchers have uncovered a more energy-efficient and faster way to recycle critical minerals from used lithium-ion batteries.

Traditional methods rely on high heat, long processing times and harsh chemicals to recover a small fraction of critical materials from batteries used in everything from smartphones to electric vehicles. However, the team from Rice's Department of Materials Science and Nanoengineering developed a process that uses a water-based solution containing amino chlorides to extract more metals in less time

The team published the findings in a recent edition of the scientific journal Small.

Simon King, a sophomore studying chemical and biomolecular engineering who completed this work as a summer research fellow at the Rice Advanced Materials Institute, served as first author of the study. He worked with corresponding authors Pulickel Ajayan, the Benjamin M. and Mary Greenwood Anderson Professor of Engineering, and Sohini Bhattacharyya, a research scientist in Ajayan’s lab.

By using a hydroxylammonium chloride (HACI) solution, the team achieved roughly 65 percent extraction of key battery metals in just one minute at room temperature, according to the study. The efficiencies grew to roughly 75 percent for several metals under longer processing times.

“We were surprised by just how fast the reaction occurs, especially without the involvement of high temperatures,” King said in a news release. “Within the first minute, we’re already seeing the majority of the metal extraction take place.”

By not requiring high temperatures or long reaction times, Rice predicts the process could have a major impact on cost and the environmental impact of lithium battery recycling. Additionally, the water-based HACI solution makes waste handling easier and lowers certain environmental risks.

In addition to extracting the materials, the team went on to demonstrate that the recovered metals could be recycled and reprocessed into new battery materials.

“A big advantage of this system is that it works under relatively mild conditions,” Ajayan added in the release. “That opens the door to more sustainable and scalable recycling technologies.”

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