摘要
CO2是引发全球气候变暖的主要温室气体之一。随着世界各国对地球温室效应问题的关注,CO2减排日益引起全世界的重视。由于发电厂的CO2排放量约占全球总CO2排放量的40%,从电厂烟道气中捕集、分离CO2极为重要,化学吸收CO2方法是当前研究热点。为研究化学溶剂乙醇胺(Monoethanolamine,MEA)吸收CO2的动力学性质,建立了湿壁柱进行CO2吸收实验测定,建立CO2在MEA溶液中的吸收动力学模型。CO2与MEA的反应为快速拟一级反应,通过测得的实验数据,依据双膜理论和Fick定律求得反应速率常数。所得结果与文献值符合良好。
CO2 is one of the main greenhouse gases causing global warming. With the world on concern global warming,CO2 emission reduction has attracted increasing attention around the world. Since power plants account 40% of global CO2 emission,it is very important to capture and separate CO2 from flue gases. To seize the properties of a chemical absorbent,MEA,with specialized interested in its absorption kinetics,we investigate the absorption of CO2 into aqueous MEA solutions with a wetted wall column and then study a model for kinetics of carbon dioxide absorption. The reaction is expressed as a fast pseudo-first-order reaction. After the absorption data were obtained,double-film theory and Fick＇s law were used to obtain reaction rate constants. The reaction rate constants obtained in this work accord with the data in previous literatures.
基金
国家高技术研究发展计划(863计划)(2008AA062301)
