CO_2 Conversion and O_2 Generation using ODF-Based SOEC

摘要

Oxygen-Deficient Ferrite (ODF) particles are mixed with YSZ powders via Mechano-Chemical Bonding (MCB) process. The Solid Oxide Electrolyer Cell (SOEC) withODF/YSZ electrodes and YSZ electrolyte is utilized to decompose carbon dioxide (CO_2)into solid carbon (C) or carbon monoxide (CO) and generate oxygen (O_2) in a continuousprocess. The cells are tested in a NexTech ProbostateTM apparatus combined withEIS/potentiostate and gas chromatography (GC). In our preliminary tests, we detectedhigh percentages of CO and O_2, at the cathode and anode sides flue gases respectively,when CO_2 was fed to the cathode side and a small potential bias applied across theelectrode. Depending on the applied potential, the system is capable of decomposing CO_2into CO, even C. Through the in-situ EIS and exhaust gas analyses, and post-test studysuch as SEM, XRD, XPS of the ODF, the capability and efficiency of CO_2 decompositionare currently being evaluated.