(127d) Process Intensification for Electrochemical Utilization of CO2
AIChE Annual Meeting
2019 AIChE Annual Meeting
Topical Conference: Advances in Fossil Energy R&D
CO2 Use and Reuse
Monday, November 11, 2019 - 1:33pm to 1:54pm
Conversely, an electrochemical approach reduces the number of chemical input for FA production, but conventional electrochemical processes for CO2 reduction to FA continue to suffer from selectivity issues where the electrocatalyst produces a wide range of products. These competing products include FA, hydrogen, carbon monoxide, methanol, and methane that reduce faradaic efficiency by up to 50% . The CAER-Andora process features an enzymatic catalyst with high selectivity for FA production with turn-over-frequency >85 s-1. The CAER-Andora process combines an electrochemical cell that features graphite electrodes and an electrochemically facile charge mediator, combined with an immobilized proprietary catalyst inside a FA production cell. These processes work together to 1) reduce faradaic inefficiencies by producing only FA, 2) protect the valuable catalyst from deactivation by overpotentials, and 3) provide a modular system configuration that facilitates independent optimization of the electrochemical and production cells. Operating at <3 V, the CAER-Andora process currently produces ~1 mM FA/hour with >90% CO2 to FA conversion in the production cell, and progress towards the intensification of the CO2 utilization process will be discussed.
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