Simulation and analysis of regulation strategies for near isothermal phase change capture process under different CO2 content of flue gas
The CO2 phase change capture process has low regeneration energy consumption,but in actual production,the CO2 content(mole fraction,the same below)in flue gas generated by the upstream process is unstable,which can lead to changes in the overall energy consumption of the process.Therefore,it is necessary to study the adjustment strategies of the process parameters under different CO2 content of flue gas.Using Python to invoke Aspen Plus to simulate the near isothermal CO2 capture technology,and the effects of adsorption tower temperature(ta),desorption tower temperature(td),liquid/gas ratio(v),amine concentration(c)and desorption liquid circulation ratio(s)on the regeneration energy consumption and CO2 capture rate and the corresponding regulation strategies were analyzed.The results show that td has the most significant effect on CO2 capture rate,and the correlation coefficient is the highest(74.78%)when the CO2 content is 5.00%.ta has the most significant impact on regeneration energy consumption,and when CO2 content is 20.00%,its correlation coefficient is the highest(-55.26%).With the CO2 content increases from 5.00%to 20.00%,the regeneration energy consumption decreases from 2.35 GJ/t to 2.13 GJ/t under the condition that the CO2 capture rate is greater than 90.00%.In addition,ta,td,c and v should be adjusted accordingly according to CO2 content to ensure that CO2 capture rate is greater than 90.00%and the regeneration energy consumption is lowest.
CO2 capture processprocess simulationCO2 contentheat pump systemparameters adjustment
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