Characteristics of CO2 absorption by N,N-dimethylethanolamine (DMEA) in hollow fiber membrane contactor

被引：0

作者：

Wu J. ^{[1
]}

Pan Z. ^{[1
]}

Shang L. ^{[2
]}

Sun X. ^{[2
]}

Sun C. ^{[3
]}

Sun X. ^{[2
]}

机构：

[1] College of Petroleum Engineering, Liaoning Petrochemical University, Fushun

[2] School of Environmental & Safety Engineering, Liaoning Petrochemical University, Fushun

[3] China Petroleum Pipeline Engineering Co., Ltd., Langfang

[4] Fushun Special Equipment Supervision and Inspection Institute, Fushun

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2022年 / 41卷 / 04期

关键词：

CO[!sub]2[!/sub] capture; DMEA; Mass transfer; Membrane contactor; Numerical simulation;

D O I：

10.16085/j.issn.1000-6613.2021-0757

中图分类号：

学科分类号：

摘要：

N,N-dimethylethanolamine (DMEA) is a promising absorbent because of its fast reaction rate and high CO2 trapping ability. In this study, DMEA, as a new type of absorbent, was used in hollow fiber membrane contactors to separate CO2 from CO2/CH4 gas mixtures. A two-dimensional steady-state mathematical model was established to simulate the effects of MEA (monoethanolamine), DEA (diethanolamine), MDEA (N-methyldiethanolamine) and DMEA on the absorption properties of CO2 under different operating conditions. The results showed that the decarbonization performance was MEA>DMEA>DEA>MDEA, the effect of gas phase parameters on decarbonization rate was more significant than liquid phase parameters, the decarbonization rate decreased with the increase of gas flow rate and CO2 concentration, the decarbonization rate increased with the increase of liquid velocity and absorbent concentration, and the removal efficiency of CO2 can be improved by properly increasing absorbent flow rate and absorbent concentration. In addition, the CO2 absorption flux will increase with the increase of gas velocity and decrease with the increase of CO2 load in the liquid phase. Finally, through the joint action of two influencing factors, the best operating conditions of membrane contactor for acid gas separation were determined. Therefore, membrane absorption had good potential in natural gas decarbonization. © 2022, Chemical Industry Press Co., Ltd. All right reserved.

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页码：2132 / 2139

页数：7

共 33 条

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