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

Abstract

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 before and after the power generation had the dependence on T int.

Novel Electrode Evaluation Method for Pulse Jet Solid Oxide Fuel Cells using Liquid Hydrocarbon Fuels

“…Against this background, we previously proposed a new SOFC that directly utilizes hydrocarbons. [40][41][42] In this cell, called a pulse jet SOFC (PJ-SOFC), a liquid-fuel injector used in gasoline engines is placed below the fuel electrode, which is directly supplied with liquid hydrocarbon fuel (see Fig. 1).…”