Catalytic Enhancement of Solid Carbon Oxidation in HDCFCs

Abstract

Hybrid direct carbon fuel cells consisting of a solid carbon (carbon black)-molten carbonate ((62-38 wt% Li-K) 2 CO 3 ) mixtures in the anode chamber of an anode-supported solid oxide fuel cell type full-cell are tested for their electrochemical performance between 700 and 800°C. Performance was investigated using current-potential-power density curves. In the anode chamber, catalysts are mixed with the carbon-carbonate mixture. These catalysts include various manganese oxides (MnO 2 , Mn 2 O 3 , and Mn 3 O 4 ) and doped-ceria (CeO 2 , Ce 1-x Gd x O 2-x/2 , Ce 1-x RE x O 2-δ (RE = Pr, Sm)), the effectiveness of these families of catalysts are discussed with respect to electrochemical, chemical and post-mortem analysis.