Environmental Design of IGCC through Pinch Analysis, Process Integration and Parameters Analysis

Abstract Environmental consciousness and energy prices are both leading to revolutionary calls for energy alternatives, and cleaner power production technologies, and further to the efficient use of sources (e.g. coal, natural gas). Integrated gasification combined cycles (IGCC) are such technologies that can meet today's power generation needs, through the combination of high environmental performance, competitive cost-of-electricity and broad fuel flexibility. In this work, systems of IGCC are modeled to provide a robust basis for studies on energy efficiency and environmental improvement. Sensitivity analyses are performed to screen a number of process parameters and operation conditions, which lead to efficient processes. Pinch analysis principles are applied to base cases such that design is better understood and improvement modifications to design are generated for best energy and environment performances. The overall performance of the system is evaluated and improved through constructing composite curves for better heat integration and energy efficiency. From both studies of sensitivity analyses and pinch analysis, emissions levels of CO 2 , SO 2 and NO x are reduced and environmental performance is improved. Economic evaluations of modifications and improvement solutions are keys for a final decision of the optimal solutions. Moreover, further steps of detailed design of heat integration opportunities are essential to adopt a practical and feasible configuration.