离子液体-MEA混合工质平板降膜吸收CO_2

Carbon Dioxide Absorption Characteristic Into Ionic Liquid-MEA Mixed Solutions in a Plate Falling Film Reactor

设计了CO_2降膜吸收反应器,对比了四种工质20%MEA、20%IL、5%IL+15%MEA、10%IL+10%MEA吸收CO_2性能。结果表明:工质5%[N_(1111)][Gly]+15%MEA每摩尔胺吸收的CO_2量最大,且其CO_2吸收能力被完全利用程度高达89.0%。选取5%[N_(1111)][Gly]+15%MEA为吸收剂,考察了液体流量,液体温度,气体流量,气体进口CO_2浓度对5%[N1111][Gly]+15%MEA吸收剂降膜吸收性能的影响.结果表明:吸收速率随液体流量先增加之后下降,随液体温度、气体流量及气体进口CO_2浓度的增加而增加.

Carbon dioxide absorption in mixture aqueous solutions of 20%MEA, 20%IL, 5%IL＋15%MEA, 10%IL＋10%MEA was performed in a plate falling film reactor. The results showed that, the solution of 5%[N1111][Gly]＋15%MEA absorbed largest amount of CO2 per mole amine and the CO2 absorption capacity was fully utilized as high as 89.0%. 5%[N1111][Gly]＋15%MEA was choosed as absorbent. The impact of liquid flow rate, liquid temperature, gas flow rate and inlet carbon dioxide concentration were studied on the carbon dioxide absorption rate. The results showed that, the absorption rate increased with increasing liquid flow rate and then decreased. The absorption rate increased with the increasing liquid temperature, gas flow rate and inlet carbon dioxide concentration.