SEPARATION OF VOCS FROM N2 SING POLY(ETHER BLOCK AMIDE) MEMBRANES

被引:29
作者
Liu, Li [1 ]
Chakma, Amit [1 ]
Feng, Xianshe [1 ]
Lawless, Darren [2 ]
机构
[1] Univ Waterloo, Dept Chem Engn, Waterloo, ON N2L 3G1, Canada
[2] Monteco R&D Ctr, Mississauga, ON L5T 1Z2, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
poly(ether block amide); membrane; separation; VOC; gasoline; emission control; COMPOSITE MEMBRANES; BOUNDARY-LAYER; GAS PERMEATION; VAPOR; MIXTURES; TRANSPORT; NITROGEN; SERIES; WATER;
D O I
10.1002/cjce.20181
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
This work deals with the separation of volatile organic compounds (VOCs) from nitrogen streams for organic vapour emission control by poly(ether block amide) membranes. As representative air pollutant VOCs, n-pentane, n-hexane, cyclohexane, n-heptane, methanol, ethanol, n-propanol, n-butanol, acetone, dimethyl carbonate, and methyl tert-butyl ether were used in this study. The separation of both binary VOC/N-2 and multicomponent VOCs/N-2 gas mixtures was carried out, and the membranes exhibited good separation performance. A VOC concentration of more than 90 mol% was achieved at a feed VOC concentration of 5 mol%. It was found that the permeances of the VOCS were mainly dominated by their solubilities in the membrane, whereas the permeance of N-2 was affected by the presence of the VOCs. The permeance of N-2 in the VOC/N-2 mixtures was shown to be higher than pure N-2 permeance due to membrane swelling induced by the VOCs dissolved in the membrane. Nevertheless, theVOC/N-2 selectivity increased with an increase in the feed VOC concentration. Among the VOCS studied, the membrane showed a higher permeance to alcohol VOCs than paraffin VOCs. The effects of feed VOC concentration, temperature, stage cut, and permeate pressure on the separation performance were investigated.
引用
收藏
页码:456 / 465
页数:10
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