UH tech bridge bound

Houston energy transition company announces move into new facility

At the UH Tech Bridge, Zenith aims to accelerate its research and development of novel gas and liquid filters, according to UH, to help reduce the cost of clean hydrogen. Photo by Natalie Harms

A Houston-area startup that is purifying water and chemicals with a innovative technology has announced its new office on the University of Houston's campus.

Missouri city-based Zenith Purification develops sorbents and polymeric membranes that can be used for carbon dioxide removal, hydrogen and natural gas purification, and water purification. According to the company, its processes are cost effective and offer a more efficient way to remove contaminants from water.

At the UH Tech Bridge, Zenith also aims to accelerate its research and development of novel gas and liquid filters, according to UH, to help reduce the cost of clean hydrogen.

“We are excited to embark on a new journey with the latest addition to our vibrant community, Zenith Purification LLC,” Darayle Canada, program director, startup development operations at UH Technology Bridge, said in a statement. “With their visionary team and cutting-edge technologies, they are poised to make a significant impact in the market. Their membership at the UH Technology Bridge will provide them with a supportive ecosystem, mentorship, resources, and networking opportunities to accelerate their growth.”

Zenith was founded in 2021 by Jian J. Zou in 2021. Zou has been granted three patents for his work in polymeric membrane synthesis and process development, which are the bases of the company. In July, Zenith was awarded its first research grant from the Department of Energy.

The UH Tech Bridge focuses on providing research and development space to UH-affiliated startups and entrepreneurs. The 15-building complex and its 31,000 square feet of incubator space houses more than 20 small companies and startups that provide internship and learning opportunities for UH students, along with several federally funded research centers and institutes.

In August the Tech Bridge announced that it would be partnering up with the UH Texas Gulf Coast Small Business Development Center to launch a new, collaborative program that will help innovators and entrepreneurs develop a pitch or commercialization plan. And in March it received a $2.875 million grant from the U.S. Department of Housing and Urban Development. to establish The Deck Innovation & Coworking Center.

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A View From HETI

Ahmad Elgazzar, Haotian Wang and Shaoyun Hao were members of a Rice University team that recently published findings on how acid bubbling can improve CO2 reduction systems. Photo courtesy Rice.

In a new study published in the journal Science, a team of Rice University researchers shared findings on how acid bubbles can improve the stability of electrochemical devices that convert carbon dioxide into useful fuels and chemicals.

The team led by Rice associate professor Hoatian Wang addressed an issue in the performance and stability of CO2 reduction systems. The gas flow channels in the systems often clog due to salt buildup, reducing efficiency and causing the devices to fail prematurely after about 80 hours of operation.

“Salt precipitation blocks CO2 transport and floods the gas diffusion electrode, which leads to performance failure,” Wang said in a news release. “This typically happens within a few hundred hours, which is far from commercial viability.”

By using an acid-humidified CO2 technique, the team was able to extend the operational life of a CO2 reduction system more than 50-fold, demonstrating more than 4,500 hours of stable operation in a scaled-up reactor.

The Rice team made a simple swap with a significant impact. Instead of using water to humidify the CO2 gas input into the reactor, the team bubbled the gas through an acid solution such as hydrochloric, formic or acetic acid. This process made more soluble salt formations that did not crystallize or block the channels.

The process has major implications for an emerging green technology known as electrochemical CO2 reduction, or CO2RR, that transforms climate-warming CO2 into products like carbon monoxide, ethylene, or alcohols. The products can be further refined into fuels or feedstocks.

“Using the traditional method of water-humidified CO2 could lead to salt formation in the cathode gas flow channels,” Shaoyun Hao, postdoctoral research associate in chemical and biomolecular engineering at Rice and co-first author, explained in the news release. “We hypothesized — and confirmed — that acid vapor could dissolve the salt and convert the low solubility KHCO3 into salt with higher solubility, thus shifting the solubility balance just enough to avoid clogging without affecting catalyst performance.”

The Rice team believes the work can lead to more scalable CO2 electrolyzers, which is vital if the technology is to be deployed at industrial scales as part of carbon capture and utilization strategies. Since the approach itself is relatively simple, it could lead to a more cost-effective and efficient solution. It also worked well with multiple catalyst types, including zinc oxide, copper oxide and bismuth oxide, which are allo used to target different CO2RR products.

“Our method addresses a long-standing obstacle with a low-cost, easily implementable solution,” Ahmad Elgazzar, co-first author and graduate student in chemical and biomolecular engineering at Rice, added in the release. “It’s a step toward making carbon utilization technologies more commercially viable and more sustainable.”

A team led by Wang and in collaboration with researchers from the University of Houston also shared findings on salt precipitation buildup and CO2RR in a recent edition of the journal Nature Energy. Read more here.

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