Thermodynamic Performance Assessment of IGCC Power Plants with Various Syngas Cleanup Processes  

作　　者：Yunhan Xiao  Zhen Li Bo Wang Lifeng Zhao Jinling Chi 

机构地区：[1]Key Laboratory of Advanced Energy and Power, Chinese Academy of Sciences(Institute of Engineering Thermo-physics), P. O. Box 2706, Beijing 100190, China [2]Research Center for Cleaned Energy and Power, Chinese Academy of Sciences [3]University of the Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Journal of Thermal Science》2012年第5期391-403,共13页热科学学报（英文版）

基　　金：support for this work by the International Science & Technology Cooperation Program of China (2010DFB70560) and(2010GH0902)

摘　　要：The present work explores how much IGCC can benefit from warm gas clean-up（WGCU）in comparison with conventional cold gas clean-up（CGCU） and what are the respective contributions of dry particulates removal and warm gas desulfurization （WGD） in a plant-wide point of view. Influences of key parameters of WGD on ther- modynamic performance of IGCC plant including desulfurization temperature, oxygen concentration in the re- generation stream, and H2S removal efficiency are discussed. It is obtained that the net efficiency of IGCC with full WGCU experiences an improvement of 1.77 percentage points compared with IGCC with full CGCU. Of which, dry particulates removal without water scrubber contributes about 1 percentage point. The influence of desulfurization temperature on thermodynamic performance of IGCC with WGD is weak especially when it is higher than about 350~C, which indicates that more focus should be put on investment cost, technical feasibility and sorbent stability for the selection of optimal operation temperature. Generally, 2%-3% of oxygen concentra- tion in the regeneration stream might be reasonable in a thermodynamic performance point of view. In addition, the improvement of 0.31 percentage points can be obtained by removal of H2S in the syngas from 27 ppm to 3 ppm.

关 键 词：IGCC Syngas clean-up DESULFURIZATION ZnO sorbent Thermodynamic performance assessment 

分 类 号：X701.3[环境科学与工程—环境工程] TG139.7[一般工业技术—材料科学与工程]