文献类型：期刊文献

英文题名：Process integration and energy optimization of an MDEA/PZ-based CO? capture system for coal-fired power plants

作者：Shao, Qi[1]; Chen, Qingchuan[2]; Zhang, Guangyao[1]; Zou, Yang[2]; Han, Zhijiang[2]; Yang, Qiang[1]

机构：[1] School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Shanghai Boiler Works Co., Ltd., Shanghai, 200245, China

年份：2026

卷号：228

起止页码：199

外文期刊名：Chemical Engineering Research and Design

收录：EI(收录号：20261020216980)

语种：英文

外文关键词：Carbon capture - Carbon capture and storage - Carbon capture and utilization - Carbon dioxide - Carbon dioxide process - Coal - Coal fired power plant - Energy efficiency - Energy utilization - Optimization - Process control - Solvents - Steam condensate

摘要：Coal-fired power plants are major contributors to CO? emissions, making efficient post-combustion capture essential. In this work, a fully integrated process model of a 1000 MW ultra-supercritical coal-fired power plant was developed in Aspen Plus, incorporating an MDEA/PZ blended amine absorption system, a CO? compression unit, and the plant thermal cycle. The impacts of lean solvent loading, solvent composition, and stripper operating pressure on capture performance and energy consumption were evaluated. Based on the parametric analysis, absorber intercooling and rich-split regeneration were introduced to enhance energy efficiency. Under optimal conditions, the regeneration energy requirement was reduced to 2.08 GJ/tCO?. Optimization of regeneration steam utilization, including condensate return and cascaded steam use, increased the net plant efficiency from 38.94% to 41.23%. These results show that integrated solvent and process optimization reduces the energy penalty of post-combustion CO? capture in large-scale coal-fired power plants. ? 2026