复合胺砜溶液吸收CO_2传质动力学研究  

Mass Transfer and Kinetics of CO_2 Absorption in Aqueous MDEA/DMSO Solutions

作　　者：罗沁澜 冯斌 强磊 李娜[1] 周屈兰[1] LUO Qin-Lan ,FANG Bin, QIANG Lei, LI Na ,ZHOU Qu-Lan(State key laboratory of multiphase flow in power engineering, Xi＇an Jiaotong University, Xi＇an 710049, Chin)

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《工程热物理学报》2018年第8期1763-1768,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.51076127);教育部新世纪优秀人才计划(No.NCET-13-0468)

摘　　要：利用湿壁塔法测量复合胺砜溶液吸收CO_2的动力学特性,实验工况包括不同的反应温度(293.15～323.15 K)和不同的溶液浓度(0.5～6.6 mol/L)。本文简化了气液传质模拟,计算了不同工况下的吸收速率常数、总反应速率常数、二级反应速率常数及增强因子等动力学参数,同时根据实验结果拟合得到了二级反应速率常数和增强因子的经验公式,并得到了复合胺砜溶液与CO_2反应的表观反应活化能为为20.38 kJ/mol。In this study, the CO2 absorption rates in aqueous MDEA/DMSO solutions at various temperatures of 293.15 K, 303.15 K, 313.15 K and 323.15 K and concentrations varied from 0.5 mol/L to 6.6 mol/K were measured by using a laboratory wetted-wall column reactor with an immobile gas-liquid interface. A simplified kinetic model of gas-liquid absorption was developed, the mass transfer and dynamic parameters, such as the absorption rate constant, the overall reaction rate constant, the second-order reaction rate constant and the enhancement factor, were evaluated. The relationship between second-order reaction rate constant and the reaction temperature was obtained, the effect of solution concentration on the enhancement factor was also assessed, and the activation energy was estimated at a value of 20.38 kJ/mol.

关 键 词：CO2脱除 MDEA 动力学 质量传递 

分 类 号：TK09[动力工程及工程热物理]