MA Guoguang,WANG Jinyang,ZHANG Tao.Design and optimization of CO2 capture coupled process[J].Low-carbon Chemistry and Chemical Engineering,2024,49(07):76-83.
MA Guoguang,WANG Jinyang,ZHANG Tao.Design and optimization of CO2 capture coupled process[J].Low-carbon Chemistry and Chemical Engineering,2024,49(07):76-83. DOI: 10.12434/j.issn.2097-2547.20230428.
Design and optimization of CO2 capture coupled process
)捕集耦合工艺流程(简称“耦合工艺”)。采用Aspen Hysys软件对影响耦合工艺节能效果的关键参数(级间物流冷却温度、贫液节流后压力、酸气再压缩压力和再生塔底重沸器温度)进行了分析,并通过响应面分析与遗传算法结合的方式对关键参数进行了优化。结果表明,优化后耦合工艺的级间物流冷却温度为58 ℃,贫液节流后压力为0.084 MPa,酸气再压缩压力为0.195 MPa,再生塔底重沸器温度为92 ℃。与联合工艺(膜分离+醇胺法)相比,耦合工艺的能耗明显降低,脱碳单位能耗(脱除1 t CO
The energy consumption of high carbon natural gas increases with the increase of carbon content when it is decarburized by the alcohol amine process. In order to reduce the energy consumption of high carbon natural gas
a carbon dioxide (CO
2
) capture coupled process (referred to as “coupled process”) was proposed
which coupled the alcohol amine process (N-methyldiethanolamine as the absorbent) with inter-stage cooling
liquid rich shingle desorption
acid gas recompression heat pump and steam-mechanical recompression technology (MVR) heat pump processes. The key parameters
such as inter-stage flow cooling temperature
lean liquid throttling pressure
acid
gas recompression pressure and regenerator bottom reboiler temperature
were analyzed by Aspen Hysys software
and the key parameters were optimized by response surface analysis and genetic algorithm. The results show that the inter-stage flow cooling temperature
the lean liquid throttling pressure
the acid gas compression pressure and the regenerator bottom reboiler temperature is 58 ℃
0.0844 MPa
0.195 MPa and 92 ℃
respectively. Compared with the combined process (membrane separation + alcohol amine method)
the energy consumption of the coupled process is significantly reduced
and the unit energy consumption of decarbonization (the energy required to remove 1 t CO
2
) decreases from 1.338 GJ/t to 1.110 GJ/t. Compared with before optimization
the CO
2
content (volume fraction) in the purified gas of coupled process after optimization decreases from 2.533% to 2.326%
and unit energy consumption decreases from 1.110 GJ/t to 1.074 GJ/t.
关键词
CO2捕集耦合工艺参数优化响应面法遗传算法
Keywords
CO2 capturecoupled processparameters optimizationresponse surface methodgenetic algorithm
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Research progress of CO2 chemical absorption from flue gas and hydroconversion catalysts
Intensification of CO2 capture by active sites in functional ionic liquids
Experiment of CO2 capture by organic amine method under lime rotary kiln real flue gas condition
Research progress in preparation of fly ash based aluminosilicate materials and their CO2 capture
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