The mitigation of CO2 emissions is a major challenge for modern society. While the mitigation of energy‐related emissions can be achieved comparatively easy by switching to renewable energy sources, reduction of process‐related industrial emissions is considerably more challenging. To reduce industrial CO2 emissions, two basic routes are available: carbon direct avoidance (CDA) and carbon capture and utilization (CCU). It is shown that in terms of efficiency, CDA is to be favored when applicable. However, for applications where emissions cannot be avoided, CCU can be a viable approach allowing for emission mitigation.
The successful operation of CFY-stack with electrolyte supported cells with Ni/GDC electrode has been demonstrated in electrolysis and co-electrolysis mode at 75-85% gas conversion to provide reliable data for performance and degradation estimation. The difference of stack performance between electrolysis and co-electrolysis modes was <2%. The power consumption in steam and co-electrolysis operation was very similar and depends mainly on Nernst voltage of H2O/H2/CO2/CO containing gas composition. Gas conversion has only minor effect on power consumption over a wide operation window. SOE stack integration into carbon capture and utilization (CCU) unit for production of waxes using Fischer-Tropsch synthesis has been considered on system design level applying realistic efficiencies for internal heat utilization (heat losses). Non-converted syngas and short-chained by-products are recycled to the stack inlet and used for recovery. It has been shown that at T≥800°C a methane content of 7.5 mol-% in the feed gas is fully converted in the stack under co-electrolysis operating conditions.
High‐temperature electrolysis is known to offer a huge potential for efficient generation of hydrogen and syngas. However, experimental data on technically relevant electrolyzer systems are scarce. Herein, experimental data on a coelectrolyzer with a nominal electric input power of Pel,stack,nom,DC = 12 kW will be presented. The electrolyzer is operated for over 500 h in H2O and coelectrolysis mode under full‐ and part‐load operation. The results not only prove the viability of the chosen system approach and the high efficiency that can be reached with this electrolysis technology, but they are also applied to validate a 0D solid oxide electrolysis model.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.