EFFICIENCY ANALYSES OF A COAL GASIFICATION MOLTEN CARBONATE FUEL CELL WITH A GAS TURBINE COMBINED CYCLE INCLUDING CO{sub}2 RECOVERY

摘要

The efficiency of an integrated coal gasification system equipped with a molten carbonate fuel cell, a gas turbine and a steam turbine (IG/MCFC) is calculated. Coal is conveyed to a gasifier furnace by CO{sub}2 and changed to coal gas by adding oxygen; a methyldiethanolamine (MDEA) method is applied to initiate a cleanup procedure of the coal gas. A water-gas shift converter is employed to heat up the coal gas. The cathode gas of the MCFC is composed of CO{sub}2 and O{sub}2 with a composition of 66.7/33.3 (noble cathode gas composition). The magnitude of the system's electrical power output is assumed to be that of a 300 MW class.