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Greentown's leadership shake-up, Houston named a top city for pollution, and more trending news

Houston ranks among the most polluted cities in the country — and more top energy transition news. Photo via Getty Images

Editor's note: From a new milestone for a clean tech company to Greentown's CEO stepping down, these are the top headlines that resonated with EnergyCapital readers on social media and daily newsletter this week.

Houston company tests ​all-electric CO2-to-fuel production technology

Syzygy Plasmonics has tested its all-electric CO2-to-fuel production technology. Photo courtesy of Syzygy

Houston-based clean energy company Syzygy Plasmonics has successfully tested all-electric CO2-to-fuel production technology at RTI International’s facility at North Carolina’s Research Triangle Park.

Syzygy says the technology can significantly decarbonize transportation by converting two potent greenhouse gases, carbon dioxide and methane, into low-carbon jet fuel, diesel, and gasoline.

Equinor Ventures and Sumitomo Corp. of Americas sponsored the pilot project. Continue reading.

Houston lands on the wrong end of national pollution report

Houston ranks as the 15th most polluted city in the U.S. No other Texas city appears in the ranking. Photo via Getty Images

Houston just made a list that no one wants it to be on.

Data compiled by the National Public Utilities Council ranks Houston as the 15th most polluted city in the U.S. No other Texas city appears in the ranking. Three California cities — Bakersfield, Visalia, and Fresno — took the top three spots.

The ranking considers a city’s average volume of fine particulate matter in the air per year. Fine particulate matter (formally known as PM2.5) includes soot, soil dust, and sulphates. Continue reading.

Houston company secures $100M to fund solar projects across New York

Catalyze’s proprietary suite of technology will bring solar development practices to Lancaster and Amherst areas. Photo courtesy of Catalyze

Houston’s Catalyze announced that it secured $100 million in financing from NY Green Bank to support a 79 megawatt portfolio of community distributed generation solar projects across the state of New York.

The loan is part of Catalyze’s increased presence in New York State with operational projects coming to Lancaster and Amherst. Catalyze’s proprietary suite of technology will bring solar development practices to the area.

Catalyze is a Houston-headquartered clean energy transition company that builds, owns, finances, and operates solar and battery storage systems. Continue reading.

Greentown Labs to launch another executive search, CEO to step down after less than a year in the position

Kevin Knobloch is stepping down as Greentown Labs CEO, effective on July 31. Photos courtesy

Greentown Labs, which is co-located in the Boston and Houston areas, has announced its current CEO is stepping down after less than a year in the position.

The nonprofit's CEO and President Kevin Knobloch announced that he will be stepping down at the end of July 2024. Knobloch assumed his role last September, previously serving as chief of staff of the United States Department of Energy in President Barack Obama’s second term.

“It has been an honor to lead this incredible team and organization, and a true privilege to get to know many of our brilliant startup founders," Knobloch says in the news release. “Greentown is a proven leader in supporting early-stage climatetech companies and I can’t wait to see all that it will accomplish in the coming years.” Continue reading.

Houston expert: How to make the EV switch while factoring in impact, cost

Very often, EVs drive like new even if they’ve clocked up the miles, writes this Houston expert. Photo via Unsplash

Americans are in the midst of getting to know electric cars up close and personal. The finer points of charging and battery technology are now becoming mainstream news.

However, there’s a secret about electric vehicles (EVs) that very few people know, because very few people have driven an electric car with 50,000 or 100,000 miles on it. Very often, EVs drive like new even if they’ve clocked up the miles. No rattles and no shakes, and importantly there is no loss of efficiency, unlike gas cars which tend to lose fuel efficiency as they age. Most strikingly, battery degradation and loss of range is often minimal — even after the odometer hits 6 digits.

What does this mean? At a time when car payments, repair costs and gas prices are all weighing on consumer wallets, we are about to enter an era when it will get easier than ever before for Americans to find a great driving, longer lasting car that saves on fuel costs and needs less maintenance. Continue reading.

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A View From HETI

Quaise Energy is developing Project Obsidian, a superhot geothermal plant in central Oregon. Rendering via quaise.com.

Houston-based Quaise Energy is looking to raise $200 million to support the development of a 50-megawatt superhot geothermal plant in Oregon.

The company is seeking $100 million in Series B funding, plus an additional $100 million from grants, debt and project-level finance, a representative from the company tells Energy Capital. Axios first reported the news late last month.

Quaise specializes in terawatt-scale geothermal power. It is known for its millimeter-wave drilling technology, which was developed at MIT.

The company's Project Obsidian development in central Oregon will combine conventional drilling with its millimeter-wave technology. Quaise says the project, targeted to come online in 2030, could be the first commercial plant to operate in superhot rock, a more efficient and abundant resource, but one that requires more advanced and durable drilling technology.

Quaise says Obsidian would initially generate 50 megawatts of "always-on" power and would be designed to add 200 megawatts as additional wells are developed. A power-purchase deal has already been signed for the initial 50 megawatts with an undisclosed customer.

A representative from the company says Quaise would also use the funding to continue advancing its millimeter-wave technology and prepare it for commercialization.

Last year, the company drilled to a depth of about 330 feet using its millimeter-wave technology at its field site in Central Texas.

“Our progress this year has exceeded all expectations,” Carlos Araque, CEO and president of Quaise Energy, said at the time. “We’re drilling faster and deeper at this point than anyone believed possible, proving that millimeter-wave technology is the only tool capable of reaching the superhot rock needed for next-generation geothermal power. We are opening up a path to a new energy frontier.”

Canary Media reports that Quaise plans to drill to nearly 3,300 feet later this year and to deploy its millimeter-wave technology at its power plant in 2027.

Quaise raised $21 million in a Series A1 financing round in 2024 and a $52 million Series A in 2022. Major investors include Prelude Ventures, Safar Partners, Mitsubishi Corporation, Nabors Industries, TechEnergy and others.

Quaise was one of eight Houston-area companies to appear on Time magazine and Statista’s list of America’s Top GreenTech Companies of 2025.

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