一乙醇胺喷雾吸收烟气中CO_2的实验研究  

Experimental Study on Absorption of Carbon Dioxide in Flue Gas by Monoethanolamine Fine Spray

作　　者：牛振祺[1] 郭印诚[1] 林文漪[1] 

机构地区：[1]清华大学工程力学系,北京市海淀区100084

出　　处：《中国电机工程学报》2010年第32期41-45,共5页Proceedings of the CSEE

基　　金：北京市科委科技计划课题(Z08040902950803)~~

摘　　要：为验证喷雾捕集CO2技术的可行性,应用微细喷雾法将一乙醇胺（monoethanolamine,MEA）溶液雾化,在喷雾塔中与模拟烟气逆向接触,可实现很高的CO2脱除率（95%以上）。研究不同的MEA浓度、MEA流量、烟气流量、烟气温度和CO2浓度对CO2脱除率的影响。实验结果表明,MEA溶液浓度和烟气流量对CO2脱除率影响较大：低浓度时,溶液流量增大CO2脱除率增大;在28~32℃范围内温度升高CO2脱除率上升;随CO2浓度的升高,CO2脱除率呈下降趋势。以上变化规律可归纳为反应物摩尔比、液气比和温度的影响,其中MEA与CO2的摩尔比是影响CO2脱除率的主要因素。In order to investigate the feasibility of capturing CO2 by fine spray method,experimental studies on CO2 capture in a spray scrubber were carried out.Fine spray of monoethanolamine（MEA） solutions contacted reversely with the artificial flue gas in the reactor,which can achieve high CO2 removal efficiency（above 95%）.Effects of different operating parameters on CO2 removal efficiency were investigated,including concentration of MEA solution,liquid flow rate,gas flow rate,temperature and concentration of CO2.Experimental results show that the MEA concentration and gas flow rate has important effect on CO2 removal efficiency.At the low MEA concentration,CO2 removal efficiency increases with the liquid flow rate increasing.At the temperature of 28～32℃,the higher temperature and lower CO2 inlet concentration are beneficial to promote CO2 removal efficiency.The influencing regularity can be summarized as the effects of mole ratio of reactants,liquid-to-gas ratio and temperature.The main influencing factor for the absorption of CO2 is mole ratio of reactants.

关 键 词：二氧化碳 喷雾 吸收 一乙醇胺 

分 类 号：X701[环境科学与工程—环境工程]