Aspen HYSYS Simulation of CO2 Removal by Amine Absorption from a Gas Based Power Plant
Aspen HYSYS Simulation of CO2 Removal by Amine Absorption from a Gas Based Power Plant
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发表时间：
2007-12
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通讯作者：
L. Øi
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作者：
L. Øi
利用流程模拟软件Aspen HYsys对一个简化的联合循环燃气发电厂和一个基于单乙醇胺的二氧化碳脱除过程进行了模拟。热力学性质用Aspen HYsys中提供的Peng Robinson和Amins属性包模型计算。压缩机、燃气轮机和汽轮机的绝热效率已经被安装，在不去除二氧化碳的情况下，天然气发电厂的总热效率达到58%。脱除CO2后，效率降低到50%左右。计算了脱碳装置的脱碳率和能耗与氨循环率、吸收塔高度、吸收温度和水蒸气温度的关系。当脱碳率为85%时，热耗为3.7MJ/kgCO2，接近文献值4.0MJ/kgCO2。
A simplified combined cycle gas power plant and a MEA (monoethanol amine) based CO2 removal process have been simulated with the process simulation tool Aspen HYSYS. The thermodynamic properties are calculated with the Peng Robinson and Amines Property Package models which are available in Aspen HYSYS. The adiabatic efficiencies in compressors, gas turbines and steam turbines have been fitted to achieve a total thermal efficiency of 58 % in the natural gas based power plant without CO2 removal. The efficiency is reduced to about 50 % with CO2 removal. The CO2 removal in % and the energy consumption in the CO2 removal plant are calculated as a function of amine circulation rate, absorption column height, absorption temperature and steam temperature. With CO2 removal of 85 %, heat consumption is calculated to 3.7 MJ/kg CO2 removed, close to a literature value of 4.0 MJ/kg CO2.