膜吸收CO_(2)过程中操作条件的影响特性研究  

Study on the effect of the operating conditions on the membrane absorption of CO_(2)

作　　者：臧吴琪 孙莹[1] 杨林军[1] ZANG Wu-qi;SUN Ying;YANG Lin-jun(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,江苏南京210096

出　　处：《应用化工》2022年第6期1633-1636,1641,共5页Applied Chemical Industry

基　　金：江苏省煤基CO 2捕集与地质储存重点实验室(2016年)开放基金(2016A05)。

摘　　要：分别以3种醇胺溶液:MEA、DEA和MDEA为吸收液,PP中空纤维吸收膜作为膜组件搭建膜法吸收捕集CO_(2)装置,考察不同操作条件对CO_(2)吸收性能的影响。结果表明,当吸收液浓度由0.25 mol/L增至1.5 mol/L、流速150 mL/min增至400 mL/min过程中,CO_(2)脱除效率逐渐增加,增速渐缓;而气相流速及CO_(2)浓度的升高大幅度抑制CO_(2)的脱除,CO_(2)脱除效率减少20%以上。传质速率与吸收液浓度、气液相流速及CO_(2)体积分数均成正相关。各种工况下CO_(2)脱除效率和传质速率由高到低均为MEA>DEA>MDEA;CO_(2)脱除效率和传质效率主要受CO_(2)浓度的影响。The research constructed membrane absorption CO_(2)device with PP hollow fiber membrane as membrane contactor,and three alkolamine solutions:monoethanolamine(MEA),diethanolamine(DEA)and methyldiethanolamine(MDEA)as absorption liquid,respectively.The effects of operating conditions on CO_(2)removal were investigated.The results revealed that when the absorption fluid concentration increased from 0.25 mol/L to 1.5 mol/L,flow rate 150 mL/min to 400 mL/min,the CO_(2)removal efficiency gradually increased and the rate of increase slowed down;while the increase of gas flow rate,fluid flow rate and CO_(2)volume fraction inhibited the removal efficiency of CO_(2),which was reduced by more than 20%.The mass transfer rate was positively correlated with the concentration of absorption solution,gas phase flow rate,fluid flow rate and CO_(2)volume fraction.Under the same operating conditions,the removal efficiency and mass transfer rate was:MEA>DEA>MDEA;CO_(2)removal efficiency and mass transfer efficiency were mainly affected by CO_(2)concentration.

关 键 词：膜吸收法 二氧化碳 操作条件 脱除效率 传质速率 

分 类 号：TQ028.2[化学工程]