K-2102 熱化学再生褐炭ガス化発電システム(S27-1 次世代エネルギー源に対応した発電技術(1))(S27 次世代エネルギー源に対応した発電技術)

概要

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An integrated power generation cycle with a thermochemical recuperative coal gasification process for the coproduction of hydrogen and power has been proposed based on the thermochemical recuperative energy conversion (TREC) of brown coal. Thermochemical recuperation can be considered to be energy recycling as a chemical heat pump which upgrades heat at low temperature (such as gas turbine exhaust) by supplying heat and reactants for endothermic reactions, where subsequently the accumulated energy is released at a higher temperature level during combustion of the combustible gas. The proposed cycle uses an oxygen-blown fluidised bed for gasification and a shift-reactor to maximise the production of hydrogen and carbon dioxide. Part of the gas turbine exhaust gas, is used to heat oxygen and produce steam, both of which are used as reactant in the gasifier, and steam only in the shift-reactor. Thermal energy held by the exhaust gas is utilised to produce chemical energy of the reformed products, largely H_2 and CO_2, and to a minor extent CO and CH_4. The cycle is expected to be suitable for use with low-rank coals, which have significant proportion of catalytic metallic species, Ca, Na, Mg, and Fe that enhance gasification.
一般社団法人日本機械学会の論文
2001-08-22