真空变压吸附过程捕获烟道气中CO_2的数值模拟  

Numerical Simulation of Vacuum Pressure Swing Adsorption Process for CO_2 Capture from Flue Gas

作　　者：沈春枝[1] 孙玉柱[1] 李平[1] 于建国[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《华东理工大学学报（自然科学版）》2011年第5期524-531,共8页Journal of East China University of Science and Technology

基　　金：国家863重点项目(2008AA062302);上海市浦江人才项目(08PJ14034);上海市国际合作项目(08160704000)

摘　　要：真空变压吸附(VPSA)过程的影响因素很多,且为一组复杂的非线性关系。通过计算来了解各变量对过程分离性能的影响有着实验无法替代的作用。采用沥青基活性碳小球为吸附剂,建立了VPSA过程及其能耗计算的模型,模拟研究了P/F、真空压力和CO2进料浓度对VPSA过程分离性能及其总能耗的影响。研究结果表明:P/F存在一个最佳值,使得VPSA过程的总能耗最小;随着真空压力的减小,产品气的纯度和回收率均增大,风机能耗减小,真空泵能耗增大,总能耗增大;随着CO2进料浓度的增加,产品气的纯度和回收率均增大,相反地,风机、真空泵及过程总能耗均减小。Simulation study of effects of operating parameters on vacuum pressure swing adsorption（VPSA） process is very important since there are many influential parameters on VPSA which are of non-linear.Mathematical models were derived to describe VPSA process for CO2 capture from flue gas using pitch-based spherical activated carbon beads.Effects of P/F,evacuation pressure and CO2 feed concentration on the performance of VPSA were studied.The simulation results show that there is an optimum P/F resulting in minimum total energy consumption（Wt）.Product purity,recovery and Wt of VPSA process increase with the decrease of vacuum pressure.With the increase of CO2 feed concentration,both product purity and recovery increase while the energy consumption of vacuum pump,blower and Wt decrease.

关 键 词：真空变压吸附过程 CO2捕获 数值模拟 能耗 产品纯度 回收率 

分 类 号：TQ028[化学工程]