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Houston plastics circularity center reaches new milestone — and more things to know this week

The Houston area's Cyclyx Circularity Center is one step closer to reality — and more to know this week. Photo courtesy of Cyclyx

Editor's note: It's a new week — start it strong with three quick things to catch up on in Houston's energy transition: an event not to miss, a Q&A to check out, and more.

Circular plastics project in Houston takes one more step toward becoming a reality

Cyclyx International, a joint venture that Houston-based ExxonMobil recently bought into with Agilyx and LyondellBasell, announced that it has made a final investment decision to build the first Cyclyx Circularity Center.

"This milestone is evidence of the real progress we are making to increase the circularity of plastic waste as a resource," Joe Vaillancourt, CEO of Cyclyx, says in a news release. "The first-of-its-kind CCC in Houston will serve as a blueprint, which we can replicate across the U.S. to progress our long-term goal of increasing the recycling options for plastic waste. Cyclyx is proud to be an innovator and enabler for unlocking plastic's potential."

Houston organizations ExxonMobil and LyondellBasell have committed $135 million into Cyclyx to fund operating activities and construction costs, which is expected to begin in mid-2025.

Event not to miss

There's one last energy-related event for the year. On December 19, the UH Tech Bridge's Innov8Hub Pitch Day is your last chance of the year to network with industry experts, and discover the next big thing. Register.

Why Cindy Taff is betting on geothermal

There's no silver bullet to the energy transition, but Cindy Taff of Sage Geosystems is pretty positive geothermal energy is going to be a power player in the mix of technologies sure to make a difference. In a Q&A with EnergyCapital, she explains why she's so optimistic about geothermal and her company's technology — and why the traditional oil and gas industries should take note.

"My extensive experience in both geothermal and the O&G sector is a testament to the synergistic relationship between these industries. The skills honed in O&G are not only transferable—they are essential to advancing geothermal technologies," she tells EnergyCapital. She adds that "the O&G industry can make a huge impact to geothermal by systematically driving down costs while scaling up, which is exactly what we did for unconventional shales." Read the full interview.

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A View From HETI

Fervo Energy claimed a top 10 spot on Time magazine and Statista’s new list of America’s Top GreenTech Companies of 2025. Photo via Getty Images.

The accolades keep rolling in for Houston-based Fervo Energy, a producer of geothermal power.

Fervo lands at No. 6 on Time magazine and Statista’s new list of America’s Top GreenTech Companies of 2025. The ranking recognizes sustainability-focused companies based on factors such as impact, financial strength, and innovation.

Time notes that Fervo broke ground in 2023 in Utah on what the company claims will be the world’s largest geothermal plant. The plant is scheduled to start supplying carbon-free electricity to the grid next year and to reach its 400-megawatt capacity in three years.

“Technologies like this only make a difference if we deploy them at large-scale in a way that can reduce carbon emissions and increase the reliability of the grid,” Fervo CEO Tim Latimer told Time in 2023.

The startup was named North American Company of the Year by research and consulting firm Cleantech Group for 2025. Fervo topped the Global Cleantech 100, Cleantech Group’s annual list of the world’s most innovative and promising cleantech companies.

Last year, Fervo also made Time’s list of the 200 Best Inventions of 2024. Fervo was recognized in the green energy category for its FervoFlex geothermal power system.

Founded in 2017, Fervo is now a unicorn, meaning its valuation as a private company exceeds $1 billion. The startup’s valuation is estimated at $1.4 billion. According to PitchBook data, the company raised $634 million in the fourth quarter of 2024.

In all, eight Houston-area companies appear among the top 250 greentech companies ranked by Time and Statista. Other than Fervo, they are:

  • No. 43 Lancium Technologies, an energy storage and distribution company
  • No. 50 Solugen, a producer of sustainable chemicals.
  • No. 56 Quaise Energy, which specializes in terawatt-scale geothermal power.
  • No. 129 Plus Power, a developer, owner and operator of battery storage projects.
  • No. 218 Dream Harvest, which promotes sustainable vertical farming.
  • No. 225 Cemvita, which uses synthetic biology to convert carbon emissions into bio-based chemicals.
  • No. 226 Syzygy Plasmonics, which decarbonizes chemical production.
Vermont-based BETA Technologies claimed the No. 1 spot. The company manufactures electric aircraft.

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