1. Mixed matrix membranes composed of sulfonated poly(ether ether ketone) and a sulfonated metal–organic framework for gas separation.
- Author
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Xin, Qingping, Liu, Tianyu, Li, Zhao, Wang, Shaofei, Li, Yifan, Li, Zhen, Ouyang, Jingyi, Jiang, Zhongyi, and Wu, Hong
- Subjects
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ARTIFICIAL membranes , *SULFONATES , *KETONES , *METAL-organic frameworks , *SEPARATION of gases , *ANHYDRIDES , *CARBON dioxide - Abstract
An octahedral metal–organic framework (MIL-101(Cr)) with a uniform size of ~550 nm was synthesized via hydrothermal reaction, and then was functionalized with sulfonic acid groups by concentrated sulfuric acid and trifluoromethanesulfonic anhydride. Mixed matrix membranes (MMMs) were fabricated by incorporating the as-prepared metal organic frameworks into sulfonated poly(ether ether ketone) (SPEEK). The gas separation performance of MMMs was investigated both in dry and humidified state. The addition of the sulfonated metal–organic framework increased the selectivity of the membranes for CO 2 /CH 4 and CO 2 /N 2 systems by increasing the CO 2 solubility, and the diffusion of gases through the porous metal organic frameworks led to the simultaneous increase in CO 2 permeability. The highest ideal selectivities for CO 2 /CH 4 and CO 2 /N 2 were 50 and 53 (at a CO 2 permeability of 2064 Barrer) in humidified state, respectively. The increased total water in MMMs led to increased CO 2 permeability and the increased bound water resulted in the improved CO 2 /gas selectivity. The effects of operating conditions on separation performance were investigated. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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