MEA-AMP混合醇胺捕集烟气二氧化碳过程分析  

Process analysis of CO_2 capture from flue gas with MEA-AMP mixed amines

作　　者：陈晏杰[1,2] 姚月华[1,2] 江振西[1] 张香平[2] 任保增[1] 董海峰[2] 黄莺[2] 张锁江[2] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001 [2]中国科学院过程工程研究所,离子液体清洁过程北京市重点实验室,多相复杂系统国家重点实验室,北京100190

出　　处：《计算机与应用化学》2012年第1期113-116,共4页Computers and Applied Chemistry

基　　金：国家重点基础研究发展规划基金资助项目(2009CB219907)

摘　　要：本文根据焦化烟道气实际数据,应用流程模拟软件Aspen Plus模拟分析了MEA吸收剂以及MEA和空间位阻胺AMP混合吸收剂捕集烟道气中CO_2的吸收解吸效果。结果表明,混合胺浓度30 wt%(摩尔比MEA:AMP=1:1)吸收剂的吸收效果较好,为了进一步考察该种配比混合胺吸收剂的吸收、解吸特性,对其进行了灵敏度分析,并选取了25 wt%MEA为基准吸收剂,对比分析了进料温度、解吸塔再沸器热负荷和解吸塔压力对吸收解吸效果的影响,当吸收剂进料温度40℃时,单一MEA吸收剂吸收CO_2效率86.8%,混合胺的吸收率89.6%:2种吸收剂达到55%的解吸率,单一MEA吸收剂工艺再沸器热负荷为4500 kW,混合胺吸收剂工艺再沸器热负荷为3000 kW;当解吸塔压力1.5 bar时,单一MEA吸收剂对CO_2解吸率52.4%,混合胺吸收剂的解吸率55.8%,由对比结果得出混合胺(摩尔比MEA:AMP=1:1)的吸收、解吸效果均优于单一25 wt%MEA吸收剂。Based on the actual flue gas data of coking corporation, process simulation software was used to simulate and analyze the absorption effect and desorption effect of MEA absorbent and mixed amines of MEA and sterically hindered amines AMP on the CO2 from flue gas. The results show that the mixed amine （molar ratio of MEA： AMP = 1：1） have better absorption efficiency, in order to further examine absorption and desorption effect of mixed amines, sensitivity analysis was used to investigate the influence of some key process operating variables on capture performance, 25 wt% MEA was selected as base case, Comparative analysis of the temperature of the absorbent, heat duty of the reboiler, pressure of the stripper of the 25 wt% MEA and MEA-AMP blends was performed, when the temperature of the absorbent is 40 ~C, CO2 absorption efficiency of single MEA is 86.8%, CO2 absorption efficiency of mixed amines is 89.6%; when the desorption efficiency is 55%, heat duty of the reboiler of the single MEA is 4500 kW, heat duty of the reboiler of the mixed amines is 3000 kW; when the stripper operating pressure is 1.5 bar, COs desorption efficiency of single MEA is 52.4%, COs desorption efficiency of mixed amines is 55.8%, the comparative results show that the absorption effect and desorption effect of the mixed amines is better than single 25 wt% MEA.

关 键 词：混合胺 吸收率 解吸率 CO2 

分 类 号：TQ028.2[化学工程]