Poisoning Effect of Sulfur Compounds in Pulse Jet-Rechargeable Direct Carbon Fuel Cells

摘要

Pulse Jet-Rechargeable Direct Carbon Fuel Cells (PJ-RDCFCs) in which liquid hydrocarbon is supplied at regular intervals is one application of SOFCs. Most commercial liquid hydrocarbon fuel contains sulfur-based impurities, and thus their poisoning effect on power generation must be considered. In this study, power generation characteristics of PJ-RDCFCs were investigated using supplied fuel containing sulfur over a wide range of fuel-supply interval times (T_(int)): time between fuel pulses). Under both flow-like conditions where T_(int) was short (≤ 5 sec) and pulse-supply condition where T_(int) was long (≥ 10 sec), the power density (P) decreased when fuel with sulfur was supplied. The P of a PJ-RDCFC and the degradation rate evaluated by using hydrogen fuel before and after the power generation had the dependence on T_(int).