new hire

New York law firm expands energy practice with new partner appointment

Sarah McLean brings over 20 years of energy industry experience to her new role at Willkie Farr & Gallagher. Photo via Wilkie.com

Willkie Farr & Gallagher has announced that Sarah McLean has joined the firm’s Houston office as a partner. It's the sixth energy industry group hire in the past year.

McLean’s practice will focus on private equity transactions. Mostly the transactions will be acting for sponsors in making portfolio investments, exiting their investments, and growing their platform companies.

“Willkie has leading private equity and transactional capabilities, a fast-growing energy platform and a collaborative culture across the Firm," McLean says in a news release. "I’m excited to join the exceptional team here and further strengthen Willkie’s dynamic work across the energy sector to support the growing needs of our clients.”

McLean was a joint head of the US Energy industry group at Shearman & Sterling prior to Willkie Farr & Gallagher, and her experience in the energy sector includes 20 years.

“Sarah is a standout private equity and energy lawyer and we are pleased to welcome her to Willkie,” Chairman Thomas Cerabino says in the release. ”She brings significant dealmaking experience to our global energy team in Texas and across the U.S. and Europe and will be an invaluable resource to our clients navigating the changing energy market.”

Willkie provides legal solutions to businesses that address critical issues that affect multiple industries and markets with 13 offices worldwide.

“Sarah has a stellar reputation as a market-leading lawyer and dealmaker, with deep private equity and M&A experience in the oil and gas and energy transition sectors that will further the growth of our expanding Texas platform,” Archie Fallon, managing partner of the Houston office, says in a news release. “As clients look for new opportunities in the evolving energy sector, Sarah’s substantial track record and experience will complement our capabilities in Texas and across the firm, and we are thrilled to welcome her to Willkie.”

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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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