Durable and Impurity Resilient CO 2 Electrolysis for Practical Implementation

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🔬研究者:Insights on catalyst design and operational parameters for durable CO2 electrolysis under real-world conditions.

🏢実務担当者:Potential to reduce CCU project costs by eliminating upstream capture and purification steps.

🏛政策担当者:Supports industrial decarbonization by enabling cost-effective utilization of waste CO2 streams.

CO 2 electrolysis is an attractive approach for converting waste carbon emissions into low impact, value added chemical products. However, capital and operating costs have been a prohibitive hurdle toward practically implementing electrolysis in industrial projects. One contributing reason is the poor stability of current electrolyzer designs, which require ultra-high purity CO 2 inputs to preserve electrode stability. This limitation restricts the contexts through which electrolysis-based utilization projects can be economically deployed as preliminary capture and purification processes further drive up the cost and complexity of industrial projects. Durability issues experienced by current electrolyzer designs result in additional build and maintenance costs that further prohibit reliable, practical and economic implementation of CO 2 electrolysis at scale. To reduce these barriers to deployment, we have developed a unique catalyst architecture that enables degradation resistant operation of electrolyzer assemblies in the presence of common emission impurities. Implementing these architectures within full electrolyzer assemblies enables the direct utilization of the impure and dilute CO 2 streams that constitute process emissions as the feedstock for our electrolyzer without prior separations or gas conditioning. Herein, we evaluate CO 2 electrolyzer performance using dilute CO 2 at concentrations as low as 10% as well as common trace impurities found in industrial emissions, such as SO 2 , NO, and O 2 , and discuss their impact on electrolyzer performance. Critical parameters that affect durability, including water management, catalyst degradation, carbonate precipitation, and anolyte effects are characterized within zero-gap electrolyzers using both standard and modified Ag cathodes. Resilient operation of the modified electrolyzer was achieved using dilute and impure feeds over 100 to 1,000 hour experimental intervals using a combination of cathode and operational modifications. Operational stability was further qualified using sampled process emissions generated by an industrial ethylene oxidation process as the sole feedstock for the electrolyzer. The insights gained from these lab-scale testing results have informed desired operational windows for upstream emissions quality from our target partners for future on-site demonstrations. Current efforts are now focused on scaling toward multi-cell electrolyzer stacks capable of direct downstream integration of live industrial processes for upcoming on-site demonstrations.

• semanticscholar https://doi.org/10.1149/ma2026-01291456mtgabsfirst seen 2026-07-20 05:30:34