An innovative system by integrating the gasification unit with the supercritical water unit to produce clean syngas for solid oxide fuel cell (SOFC): System performance assessment

摘要: Abstract Existence of impurities in the product gas hinders application system which combines gasification with solid oxide fuel cell (SOFC). A new method is proposed to produce qualified syngas, integrates unit supercritical water (SWU). The SWU contains mixer, separator, reactor (SWR) and expander. To analyze performance process from a systematic perspective, downstream operating units primarily including SOFC, burner, heat recovery steam generation cycle are designed. Model for whole developed by using Aspen Plus mathematical model SOFC. Sensitivity analysis regarding utilization factor (Uf) mass ratio tars (T/W) conducted terms electrical efficiency, SOFC efficiency voltage. Results show that combustible components obtained syngas mainly contain CH4, H2, CO. Tars completely decomposed only slight amount light hydrocarbons (except CH4) present. One SWR can undertake functions shift, tar reforming methane synthesis concurrently. integrated offer 78.2%, predicted be 46.3%. Uf has significant influence on while it efficiency. As T/W rises 1.6% 2%, voltage slightly increase.