new deal

Oxy's sustainability subsidiary announces DAC agreement with commodities group

Here's 1PoinFive's newest customer on its Texas CCUS project. Photo via 1pointfive.com

Oxy's carbon capture, utilization and sequestration company announced it's latest carbon dioxide removal credits purchasing agreement with a global commodities group.

Trafigura has agreed to purchase carbon dioxide removal credits to be produced from 1PointFive’s first industrial-scale Direct Air Capture facility, Stratos, that is being built in Texas.

Stratos, which is expected to be the largest facility of its kind in the world, will be configured to be able to capture up to 500,000 metric tons of CO2 annually when fully operational. The captured CO2 underlying Trafigura’s removal credits plan to be stored through durable subsurface saline sequestration.

The advance purchase of DAC credits from 1PointFive will support early-stage technologies to enable high-quality carbon removal credits. The deal can lead to broader adoption of 1PointFive’s CDR credits to help hard-to-abate industries address their emissions.

“We are delighted to collaborate with 1PointFive as we expand our global customer offering for hard-to-abate sectors,” Hannah Hauman, global head of Carbon Trading for Trafigura, says in a news release. “Supporting the development of large-scale removals projects demonstrates our commitment to advancing carbon sequestration technologies, underpinning demand today to enable the scaling of production for tomorrow.”

1PointFive is working to help curb global temperature rise to 1.5°C by 2050 through the deployment of decarbonization solutions, which includes Carbon Engineering's Direct Air Capture and AIR TO FUELS solutions alongside geologic sequestration hubs.

Last November, Canada’s TD Securities investment bank agreed to buy 27,500 metric tons of carbon removal credits from 1PointFive's Stratos, news that followed Amazon's commitment to purchase 250,000 metric tons of carbon removal credits. BlackRock has agreed to pump $550 million into the project, the company reported last fall.

Trafigura continues to invest in renewable energy projects and technologies to facilitate the transition to a low-carbon economy. The company works through joint ventures including H2Energy Europe and Nala Renewables. The deal is Trafigura’s first transaction towards meeting its 2023 goal, as is its commitment as a Founding Member of the First Movers Coalition to purchase at least 50,000 tons of durable and scalable net carbon dioxide removal credits generated through advanced CDR technologies.

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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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