期刊
AICHE JOURNAL
卷 68, 期 1, 页码 -出版社
WILEY
DOI: 10.1002/aic.17410
关键词
facilitated transport membrane; multisilver complex; propylene; propane separation; pi complexation
资金
- National Natural Science Foundation of China [22178327]
- Key Scientific Research Projects in Universities of Henan Province [21zx006]
A facilitated transport membrane was fabricated using a solution-casting method, containing zero-complex Ag(4)tz(4) and 6FDA-TMPDA, which showed excellent separation performance towards C3H6/C3H8 and great long-term stability, making it a promising candidate for gas separation applications.
Facilitated transport membrane containing a zero complex Ag(4)tz(4) and 6FDA-TMPDA was fabricated via a solution-casting method and their separation performance toward C3H6/C3H8 was investigated. Ag(4)tz(4) complexes were well dispersed in the polymeric matrix owing to the weak hydrogen bond between Ag(4)tz(4) and 6FDA-TMPDA which can efficiently improve their interface compatibility. The reversible pi complexation between C3H6 and Ag+ facilitates the C3H6 transport in membranes, which is beneficial to achieve high C3H6/C3H8 permselectivity according to the density functional theory calculation. Remarkably, the best separation performance was achieved by the 10 wt% Ag(4)tz(4) membrane, for which the C3H6 permeability is 22 Barrer and the C3H6/C3H8 selectivity reaches up to 43, surpassing the Robeson upper bound. In addition, the membranes also exhibit great long-term stability (>120 h). The excellent separation performance together with the long-term stability render the membrane to be an interesting candidate for C3H6/C3H8 separation.
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