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The effect of membrane pores wettability on CO_2 removal from CO_2/CH_4 gaseous mixture using NaOH, MEA and TEA liquid absorbents in hollow fiber membrane contactor

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Chinese Journal of Chemical Engineering 2018年第9期26卷 1845-1861页

作者： ali taghvaie nakhjiri Amir Heydarinasab Omid Bakhtiari Toraj Mohammadi Department of Chemical Engineering Science and Research Branch Islamic Azad University Membrane Research Center Faculty of Chemical and Petroleum Engineering Razi University Research Center for Membrane Separation Processes Faculty of Chemical Engineering Iran University of Science and Technology (IUST)

The present paper renders a modeling and a 2D numerical simulation for the removal of CO_2from CO_2/CH_4gaseous stream utilizing sodium hydroxide(NaOH),monoethanolamine(MEA)and triethanolamine(TEA)liquid absorbents inside the hollow fiber membrane ***-current arrangement of absorbing agents and CO_2/CH_4gaseous mixture flows are implemented in the modeling and numerical ***-wetting and partial wetting modes of operation are considered where in the partial wetting mode,CO_2/CH_4gaseous mixture and liquid absorbents fill the membrane *** deteriorated removal of CO_2in the partial wetting mode of operation is mainly due to the mass transfer resistance imposed by the liquid in the pores of *** validation of numerical simulation is done based on the comparison of simulation results of CO_2removal using Na OH and experimental data under non-wetting mode of *** comparison illustrates a desirable agreement with an average deviation of less than 5%.According to the results,MEA provides higher efficiency for CO_2removal in comparison with the other liquid *** order for CO_2removal performance is MEAN Na OHN *** influence of non-wetting and partial wetting modes of operation on CO_2removal are evaluated in this article as one of the ***,the percentage of CO_2sequestration as a function of gas velocity for various percentages of membrane pores wetting ranging from 0(non-wetting mode of operation)to 100%(complete wetting mode of operation)is studied in this research paper,which can be proposed as the other *** results indicate that increase in some operational parameters such as module length,membrane porosity and absorbents concentration encourage the removal percentage of CO_2from CO_2/CH_4gaseous mixture while increasing in membrane tortuosity,gas velocity and initial CO_2concentration has unfavorable influence on the separation efficiency of CO_2.

关键词： CO2 removal Membrane wettability Numerical simulation CO2/CH4 gaseous mixture NaOH MEA and TEA liquid absorbents

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