Optimisation of pre-combustion capture for IGCC with a focus on the water balance

Abstract

Multi-objective optimisation is applied to the simulation of an IGCC power station with solvent based CCS technology. An Aspen Plus® model of the IGCC power station including CCS is interfaced with an Excel based genetic algorithm to optimise the process. The process is optimised with respect to capital cost and energy efficiency for a range of operating conditions of the solvent plant. This work is based on an air-blown gasification process consuming pre-dried lignite, it uses pinch analysis to design a HRSG for the IGCC power station with CCS to determine the power produced by the power station as well as estimating the additional capital costs due to the CCS equipment. The genetic algorit..