Atmospheric environment

Reduction of VOC emissions by a membrane-based gas absorption process

LI Rui , XU Jun , WANG Lianjun , LI Jiansheng , SUN Xiuyun


Received September 16, 2008,Revised January 07, 2009, Accepted , Available online

Volume 21,2009,Pages 1096-1101

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A membrane-based gas absorption (MGA) process was evaluated for the removal of volatile organic compounds (VOCs) based on C6H6/N2 mixture. The absorption of C6H6 from a C6H6/N2 mixture was investigated using a hydrophobic polypropylene hollow fiber membrane contactor and the aqueous solution of N-formyl morpholine (NFM) as absorbent. The e ects of various factors on the overall mass transfer coe cient was investigated. The experimental results showed that the removal e ciency of C6H6 could reach 99.5% in present studied system. A mathematical model based on resistance-in-series concept was presented to predict the value of overall mass transfer coe cient. The average error between the predicted and experimental values is 7.9%. In addition, conventional packed columns for VOCs removal was also evaluated for comparison.

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