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Houston researchers: Texas to face gridlock challenges with reducing emissions in transportation

One of the biggest obstacles to Texas' net-zero goals is its transportation sector, according to Houston research. Photo via UH.edu

A new report found that one of Texas' biggest roadblocks with reducing emissions is its transportation sector.

In its white paper series, the University of Houston's energy researchers found that — unless something changes — the Lone Star State is not likely to hit its carbon neutrality goals by 2050 within the transportation sector.

“What would it take to make the Texas transportation sector net zero by 2050?” Ramanan Krishnamoorti, UH vice president for energy and innovation, says in a news release. “The answer is a miracle, policy interventions that start as soon as possible, and somewhere between 30 to 50 billion dollars of public money between now and 2050 and at least an equal match from the private sector.”

According to the Net Zero in Texas: The Role of Transportation report, over 230 million metric tons of carbon dioxide gas is released from Texas roads each year. By 2050, estimates show that the remaining gasoline and diesel vehicles on the road will still be contributing about 40 million metric tons of emissions. Krishnamoorti collaborated with UH Energy researcher Aparajita Datta on a white paper.

“The future is crucial not only for Texas, where carbon emissions hinge on transportation solutions but also for our nation. Emissions transcend state lines and considering the size of Texas, its growing population and strong industry, the impact is significant,” Krishnamoorti adds.

Some of the challenges the state faces, per the report, hinge on electric vehicle adoption, which has been slow for a variety of reasons. One is the lack of EV production materials, such as lithium, cobalt, copper, manganese and graphite, due to increased demand, which is slated to be increased by 140 to 500 percent.

The EV workforce development also poses a challenge. Right now, hourly wages in the traditional auto sector range from $26 to $60, but most jobs in the EV industry, which are not unionized, range from $17 to $21 per hour.

The call for EV infrastructure is also estimated to be high. Per a news release about the report, "the change will require an annual expenditure of $250 million to $640 million for Level-2 (L2) charging stations and between $500 million and $1.3 billion for DC Fast Charging (DCFC) stations in 2040."

The transition will include an addition of 40,000 and 180,000 jobs in Texas between now and 2050, as well as an estimated $104 billion addition in public health benefits for Texans – fewer deaths, fewer asthma attacks and fewer sick days, according to the study.

“It is evident that decarbonizing Texas’ transportation sector will be a significant challenge and relying solely on consumer behavior to change is unrealistic,” Krishnamoorti says in the release. “We need robust policies to drive the state’s transportation electrification. Let’s acknowledge the journey ahead; federal mandates alone will not guide us to net zero by 2050. Texas needs to act now.”

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A View From HETI

Rice University scientists' “recharge-to-recycle” reactor has major implications for the electric vehicle sector. Photo courtesy Jorge Vidal/Rice University.

Engineers at Rice University have developed a cleaner, innovative process to turn end-of-life lithium-ion battery waste into new lithium feedstock.

The findings, recently published in the journal Joule, demonstrate how the team’s new “recharge-to-recycle” reactor recharges the battery’s waste cathode materials to coax out lithium ions into water. The team was then able to form high-purity lithium hydroxide, which was clean enough to feed directly back into battery manufacturing.

The study has major implications for the electric vehicle sector, which significantly contributes to the waste stream from end-of-life battery packs. Additionally, lithium tends to be expensive to mine and refine, and current recycling methods are energy- and chemical-intensive.

“Directly producing high-purity lithium hydroxide shortens the path back into new batteries,” Haotian Wang, associate professor of chemical and biomolecular engineering, co-corresponding author of the study and co-founder of Solidec, said in a news release. “That means fewer processing steps, lower waste and a more resilient supply chain.”

Sibani Lisa Biswal, chair of Rice’s Department of Chemical and Biomolecular Engineering and the William M. McCardell Professor in Chemical Engineering, also served as co-corresponding author on the study.

“We asked a basic question: If charging a battery pulls lithium out of a cathode, why not use that same reaction to recycle?” Biswal added in the release. “By pairing that chemistry with a compact electrochemical reactor, we can separate lithium cleanly and produce the exact salt manufacturers want.”

The new process also showed scalability, according to Rice. The engineers scaled the device to 20 square centimeters, then ran a 1,000-hour stability test and processed 57 grams of industrial black mass supplied by industry partner Houston-based TotalEnergies. The results produced lithium hydroxide that was more than 99 percent pure. It also maintained an average lithium recovery rate of nearly 90 percent over the 1,000-hour test, showing its durability. The process also worked across multiple battery chemistries, including lithium iron phosphate, lithium manganese oxide and nickel-manganese-cobalt variants.

Looking ahead, the team plans to scale the process and consider ways it can sustain high efficiency for greater lithium hydroxide concentrations.

“We’ve made lithium extraction cleaner and simpler,” Biswal added in the release. “Now we see the next bottleneck clearly. Tackle concentration, and you unlock even better sustainability.

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