固态胺材料的CO_2真空解吸动力学研究  

Study on Vacuum Desorption Kinetics of CO_2 in Solid Amine Material

作　　者：余青霓[1,2] 朱京科[2] 卞强[1] 李中坚[2] 杨润泽[1] 魏巍[1] 雷乐成[2] 

机构地区：[1]中国航天员科研训练中心,北京100094 [2]浙江大学工业生态与环境研究所,浙江杭州310027

出　　处：《航天医学与医学工程》2013年第3期199-201,共3页Space Medicine & Medical Engineering

基　　金：国家自然科学基金资助项目(21076188);中国航天员科研训练中心资助项目(20120071)

摘　　要：目的研究固态胺材料的CO2真空解吸反应动力学。方法研究并比较了不同温度下固态胺材料的CO2真空解吸和氮气吹扫解吸反应。结果不同温度下的CO2真空解吸和氮气吹扫解吸反应均具有一级反应特征,反应速率常数随温度的提高而增大。本征反应活化能为54.29 kJ/mol,表观活化能为60.60 kJ/mol。结论较低的活化能有利于固态胺吸附剂在接近室温条件下解吸CO2。表观活化能略高于本征反应活化能显示系统中外扩散对解吸速率的影响不能完全忽略。Objective To study the vacuum desorption kinetics of CO2 in the solid amine material. Methods At different temperatures, CO2 desorpiton reactions under vacuum and nitrogen-flow conditions were studied and compared. Results It was found that CO2 desorpiton reactions, both under vacuum and nitrogen-flow conditions, were first-order reaction at ambient temperature. The desorption rate constant increased as the temperature increased. The intrinsic and apparent activation energies of the desorption reaction were 54.29 kJ/mol and 60.60 kJ/mol, respectively. Conclusion The relatively low intrinsic activation energy proves that the de- sorption of CO2 in the solid amine material can happen at room temperature. The apparent activation energy of the desorption reaction is larger than the intrinsic reaction diffusion effect can not be neglected completely. activation energy, which indicates that the external

关 键 词：固态胺 CO2真空解吸 变压吸附 反应动力学 

分 类 号：R852.8[医药卫生—航空、航天与航海医学]