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Houston researchers reach 'surprising' revelation in materials recycling efforts

keep it clean

A team led by Matteo Pasquali, director of Rice’s Carbon Hub, has unveiled how carbon nanotube fibers can be a sustainable alternative to materials like steel, copper and aluminum. Photo by Jeff Fitlow/ Courtesy Rice University

Researchers at Rice University have published a study in the journal Carbon that demonstrates how carbon nanotube (CNT) fibers can be fully recycled without any loss in their structure or properties.

The discovery shows that CNT fibers could be used as a sustainable alternative to traditional materials like metals, polymers and the larger, harder-to-recycle carbon fibers, which the team hopes can pave the way for more sustainable and efficient recycling efforts.

“Recycling has long been a challenge in the materials industry — metals recycling is often inefficient and energy intensive, polymers tend to lose their properties after reprocessing and carbon fibers cannot be recycled at all, only downcycled by chopping them up into short pieces,” corresponding author Matteo Pasquali, director of Rice’s Carbon Hub and the A.J. Hartsook Professor of Chemical and Biomolecular Engineering, Materials Science and NanoEngineering and Chemistry, explained in a news release. “As CNT fibers are being scaled up, we asked whether and how these new materials could be recycled in the future .... We expected that recycling would be difficult and would lead to significant loss of properties. Surprisingly, we found that carbon nanotube fibers far exceed the recyclability potential of existing engineered materials, offering a solution to a major environmental issue.”

Rice researchers used a solution-spun CNT fiber that was created by dissolving fiber-grade commercial CNTs in chlorosulfonic acid, according to Rice. Mixing the two fibers led to complete redissolution and no sign of separation of the two source materials into different liquid phases. This redissolved material was spun into a mixed-source recycled fiber that retained the same structure and alignment, which was unprecedented.

Pasquali explained in a video release that the new material has properties that overlap with and could be a replacement for carbon fibers, kevlar, steel, copper and aluminum.

“This preservation of quality means CNT fibers can be used and reused in demanding applications without compromising performance, thus extending their lifecycle and reducing the need for new raw materials,” co-first author Ivan R. Siqueira, a recent doctoral graduate in Rice’s Department of Chemical and Biomolecular Engineering, said in a news release.

Other co-authors of the paper are Rice graduate alumni Oliver Dewey, now of DexMat; Steven Williams; Cedric Ginestra, now of LyondellBasell; Yingru Song, now a postdoctoral fellow at Purdue University; Rice undergraduate alumnus Juan De La Garza, now of Axiom Space; and Geoff Wehmeyer, assistant professor of mechanical engineering.

The research is part of the broader program of the Rice-led Carbon Hub, an initiative to develop a zero-emissions future. The work was also supported by the Department of Energy’s Advanced Research Project Agency, the Air Force Office of Scientific Research and a number of other organizations.

Pasquali recently led another team of Rice researchers to land a $4.1 million grant to optimize CNT synthesis. The funds came from Rice’s Carbon Hub and The Kavli Foundation. Read more here.

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Solar power and storage help save Texans millions on electric bills, CEO tells Senate

price stability

Solar power and battery storage are saving Texans hundreds of millions of dollars on their electric bills, the president and CEO of the Solar Energy Industries Association recently told a congressional committee.

Abigail Ross Hopper, the association’s president and CEO, said in testimony given to the U.S. Senate Environment and Public Works Committee that states like Texas that are adding significant capacity for solar power and battery storage are enjoying lower, more stable prices for electricity.

“Unsubsidized solar is now the cheapest source of electricity in history in much of the country,” Hopper said. “With no fuel costs, solar provides a hedge against natural gas price volatility that continues to cause electricity price spikes.”

“The only way to put downward pressure on prices is by bringing more power online, not less,” she added.

To illustrate the value of solar power and battery storage, Hopper compared two hot summer days in Texas—one in July 2022 and the other in July 2025.

Hopper explained that the Electric Reliability Council of Texas (ERCOT) had begun installing solar on its grid in 2022 but had very little battery storage. ERCOT manages 90 percent of the state’s electrical load.

When ERCOT grid conditions buckled under high demand on the highlighted day in 2022, the price of electricity spiked to nearly $1,500 per megawatt-hour, Hopper said.

“Three years later, the amount of solar had increased substantially and was complemented by energy storage,” she said.

On the specified day in 2025, under even greater demand than three years earlier, sizable amounts of solar power, battery storage and wind power kept ERCOT’s midday price of electricity low and stable—around $50 per megawatt-hour. That dollar amount represented a nearly 100 percent decrease compared with the highlighted day in 2022.

Solar and wind supplied nearly 40 percent of Texas’ power during the first nine months of 2025, according to the U.S. Energy Information Administration (EIA).

Despite the state’s expansion of solar power and battery storage capacity, residential electricity prices in ERCOT’s territory rose 30 percent from 2020 to 2025 and are expected to climb another 29 percent from 2025 to 2030, according to a forecast from the Texas Energy Poverty Research Institute.

The increase in electric bills is tied to factors such as:

  • Higher natural gas prices
  • Greater demand from AI data centers and cryptomining facilities
  • Extreme weather
  • Population growth
  • Development of new transmission and distribution lines

The strain on ERCOT’s grid is only getting worse. An EIA forecast predicts demand for ERCOT electricity will jump 9.6 percent in 2026, and ERCOT expects a 50 percent jump in demand by 2029.

Spring-based private equity firm acquires West Texas wind farm

power deal

Spring-based private equity firm Arroyo Investors has teamed up with ONCEnergy, a Portland, Oregon-based developer of clean energy projects, to buy a 60-megawatt wind farm southeast of Amarillo.

Skyline Renewables, which acquired the site, known as the Whirlwind Energy Center, in 2018, was the seller. The purchase price wasn’t disclosed.

Whirlwind Energy Center, located in Floyd County, West Texas, comprises 26 utility-scale wind turbines. The wind farm, built in 2007, supplies power to Austin Energy.

“The acquisition reflects our focus on value-driven investments with strong counterparties, a solid operating track record, and clear relevance to markets with growing capacity needs,” Brandon Wax, a partner at Arroyo, said in a press release. “Partnering with ONCEnergy allows us to leverage deep operational expertise while expanding our investment footprint in the market.”

Arroyo focuses on energy infrastructure investments in the Americas. Its portfolio includes Spring-based Seaside LNG, which produces liquefied natural gas and LNG transportation services.

Last year, Arroyo closed an investment fund with more than $1 billion in total equity commitments.

Since its launch in 2003, Arroyo has “remained committed to investing in high-quality assets, creating value and positioning assets for exit within our expected hold period,” founding partner Chuck Jordan said in 2022.

$524M Texas Hill Country solar project powered by Hyundai kicks off

powering up

Corporate partners—including Hyundai Engineering & Construction, which maintains a Houston office—kicked off a $524 million solar power project in the Texas Hill Country on Jan. 27.

The 350-megawatt, utility-scale Lucy Solar Project is scheduled to go online in mid-2027 and represents one of the largest South Korean-led investments in U.S. renewable energy.

The solar farm, located on nearly 2,900 acres of ranchland in Concho County, will generate 926 gigawatt-hours of solar power each year. That’s enough solar power to supply electricity to roughly 65,000 homes in Texas.

Power to be produced by the hundreds of thousands of the project’s solar panels has already been sold through long-term deals to buyers such as Starbucks, Workday and Plano-based Toyota Motor North America.

The project is Hyundai Engineering & Construction’s largest solar power initiative outside Asia.

“The project is significant because it’s the first time Hyundai E&C has moved beyond its traditional focus on overseas government contracts to solidify its position in the global project financing market,” the company, which is supplying solar modules for the project, says on its website.

Aside from Hyundai Engineering & Construction, a subsidiary of automaker Hyundai, Korean and U.S. partners in the solar project include Korea Midland Power, the Korea Overseas Infrastructure & Urban Development Corp., solar panel manufacturer Topsun, investment firm EIP Asset Management, Primoris Renewable Energy and High Road Energy Marketing.

Primoris Renewable Energy is an Aurora, Colorado-based subsidiary of Dallas-based Primoris Services Corp. Another subsidiary, Primoris Energy Services, is based in Houston.

High Road is based in the Austin suburb of West Lake Hills.

“The Lucy Solar Project shows how international collaboration can deliver local economic development and clean power for Texas communities and businesses,” says a press release from the project’s partners.

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