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A Numerical Study on Removal of CO2 by 2-(tert-Butylamino) Ethanol in a Hollow Fiber Membrane Contactor
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-03-04 , DOI: 10.1021/acs.iecr.1c04641 Di Ao 1 , Guiyang Ma 1 , Chunyang Zang 1 , Yue Qin 1 , Yu Qi 2 , Wenfei Wan 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-03-04 , DOI: 10.1021/acs.iecr.1c04641 Di Ao 1 , Guiyang Ma 1 , Chunyang Zang 1 , Yue Qin 1 , Yu Qi 2 , Wenfei Wan 1
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Using a hollow fiber membrane contactor to absorb carbon dioxide from natural gas has been a widely studied decarbonization technology in recent years. In this study, 2-(tert-butylamino) ethanol (TBAE), as a new absorbent, was used in hollow fiber membrane contactors to separate CO2 from CO2/CH4 gas mixtures. A two-dimensional hollow fiber membrane contactor model was established using COMSOL Multiphysics. The changes of membrane specifications and operating conditions during the absorption of CO2 by TBAE, ethanolamine (MEA), ethyl-ethanolamine (EEA), and ethylenediamine (EDA) were calculated and studied using parallel countercurrent flow, absorbent tube side, and gas shell side. The research results show that the decarbonization performance from large to small is MEA > TBAE > EDA > EEA. The removal rate increased with the increase of the inner diameter of the membrane, the flow rate of the absorbent, and the concentration of the absorbent. Increasing the gas flow rate and the volume fraction of CO2 in the feed gas resulted in the decrease of the decarbonization rate, and the mass transfer rate increased with the increase of the absorbent flow rate and the volume fraction of CO2 in the feed gas. The decarbonization effect similar to that of MEA can be achieved using the TBAE absorbent by changing the specification of the membrane, such as increasing the inner diameter of the membrane wire or increasing the concentration of the absorbent.
中文翻译：
中空纤维膜接触器中2-(叔丁基氨基)乙醇去除CO2的数值研究
利用中空纤维膜接触器吸收天然气中的二氧化碳是近年来被广泛研究的脱碳技术。在这项研究中，2-（叔丁基氨基）乙醇（TBAE）作为一种新型吸收剂，被用于中空纤维膜接触器中，以从CO 2 /CH 4气体混合物中分离CO 2 。使用 COMSOL Multiphysics 建立了二维中空纤维膜接触器模型。吸收CO 2过程中膜规格和操作条件的变化通过 TBAE，乙醇胺 (MEA)、乙基乙醇胺 (EEA) 和乙二胺 (EDA) 使用平行逆流、吸收管侧和气体壳侧进行计算和研究。研究结果表明，脱碳性能从大到小依次为MEA > TBAE > EDA > EEA。去除率随着膜内径、吸收剂流量和吸收剂浓度的增加而增加。增加原料气中气体流量和CO 2体积分数导致脱碳率降低，而传质速率随着吸收剂流量和CO 2体积分数的增加而增加在原料气中。使用TBAE吸收剂，可以通过改变膜的规格，如增加膜丝的内径或提高吸收剂的浓度，达到与MEA相似的脱碳效果。
更新日期：2022-03-04
中文翻译：
中空纤维膜接触器中2-(叔丁基氨基)乙醇去除CO2的数值研究
利用中空纤维膜接触器吸收天然气中的二氧化碳是近年来被广泛研究的脱碳技术。在这项研究中，2-（叔丁基氨基）乙醇（TBAE）作为一种新型吸收剂，被用于中空纤维膜接触器中，以从CO 2 /CH 4气体混合物中分离CO 2 。使用 COMSOL Multiphysics 建立了二维中空纤维膜接触器模型。吸收CO 2过程中膜规格和操作条件的变化通过 TBAE，乙醇胺 (MEA)、乙基乙醇胺 (EEA) 和乙二胺 (EDA) 使用平行逆流、吸收管侧和气体壳侧进行计算和研究。研究结果表明，脱碳性能从大到小依次为MEA > TBAE > EDA > EEA。去除率随着膜内径、吸收剂流量和吸收剂浓度的增加而增加。增加原料气中气体流量和CO 2体积分数导致脱碳率降低，而传质速率随着吸收剂流量和CO 2体积分数的增加而增加在原料气中。使用TBAE吸收剂，可以通过改变膜的规格，如增加膜丝的内径或提高吸收剂的浓度，达到与MEA相似的脱碳效果。
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