(551f) A Novel Integrated Exergy Recuperative Coal Gasification and SOFC System (S-IGFC) for Hydrogen and Power Coproduction Using Triple-Bed Combined Circulating Fluidized Bed

Recently, we have advanced a novel principle of efficient energy utilization that is exergy recuperation to minimize the exergy loss in energy conversion processes.  The exergy recuperation causes a paradigm shift in energy science and technology which leads to revolutionary energy saving.  Applying the exergy recuperation principle for integrated coal gasification and SOFC power generation system, the exergy recuperative energy conversion in which the waste heat from SOFC is recuperated and recycled as reaction heat of endothermic coal gasification can drastically improve the conversion efficiency because of no exergy loss due to the combustion.  In the present study, the conceptual design of a super integrated exergy recuperative coal gasification and SOFC (S-IGFC) system for hydrogen and power coproduction by using a triple-bed combined circulated fluidized bed (TBCFB) as a gsifier is described.  In addition, the self-heat recuperation technology in which process heat is circulated by providing compression work without any heat addition can be applied to several process modules of IGCC/IGFC such as coal drying, CO2 gas separation, cryogenic air separation, etc. The detail of energy saving in S-IGFC by self-heat recuperation technology will be also discussed.