Considering steady state and equilibrium condition , gasification process is simulated. For gasification process, it PF-04217903 is assumed that all sulphur goes to H2S  and tars are assumed to be negligible in the syngas  and . In this study, 2% carbon loss in ash  is also assumed. Mass flow rate of air is determined by the assumed equivalence ratio for the gasification process. The gasified products are then cleaned for dust particles (ash, chars and other removable impurities) and subsequently cooled in superheater-tube banks of the steam power cycle. For this sequence of heat exchange, temperature profiles of the two heat exchanging fluids are thermodynamically efficient. The produced syngas is then divided in two streams by a splitter, one for ethanol production and the other for power generation as well as for refrigeration.
2.2. Power generation
Depending upon the composition of the syngas for different inputs, its heat value is different. Syngas is then utilized for power generation in a combined cycle. For the gas power of the combined cycle, cleaned and cooled syngas is compressed by syngas compressor and then it is fed to the combustion chamber. Air is also fed to the combustion chamber in a different stream from the air compressor. Hot and pressurized combustion products then expand in a gas turbine to generate gas cycle power.