An amino-coordination metal–organic framework for highly selective C2H2/CH4 and C2H2/C2H4 separations through the appropriate control of window sizes. Issue 34 (11th April 2017)

• Record Type: Journal Article
• Authors: Zhang, Ling; Cui, Xili; Xing, Huabin; Yang, Yu; Cui, Yuanjing; Chen, Banglin; Qian, Guodong
• Is Part Of: RSC advances. Volume 7:Issue 34(2017)
• Page Start: 20795
• Page End: 20800
• Publication Date: 2017-04-11
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c7ra02741a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : An amino-coordination microporous metal-organic frameworkZJU-198a was demonstrated as a valuable adsorbent for highly selective C2 H2 /CH4 and C2 H2 /C2 H4 separations under ambient conditions. Abstract : The efficient separation of C2 H2 versus C2 H4 and CH4 to obtain high-purity C2 H2 and C2 H4 is of significance for making full, economic use of these raw chemicals. Herein, an amino-coordination microporous metal–organic frameworkZJU-198, ZnL·DMF (ZJU = Zhejiang University, L = (2 E, 2 E ′)-3, 3′-(5-amino-1, 3-phenylene)diacrylic acid, DMF = N, N ′-dimethylformamide), has been demonstrated as a valuable adsorbent for C2 H2 /C2 H4 and C2 H2 /CH4 separations. The activatedZJU-198a exhibits moderate C2 H2 uptakes (99.4 cm 3 cm −3 for 273 K and 98.4 cm 3 cm −3 for 298 K under 1.0 bar) and moderately high C2 H2 /C2 H4 selectivity (5.8 to 7.7 at 273 K and 4.8 to 7.2 at 298 K). Specifically, the C2 H2 /CH4 selectivity ofZJU-198a reaches up to 497.9 and 391.1 at 273 K and 298 K, respectively. To the best of our knowledge, the C2 H2 /CH4 selectivity coefficients ofZJU-198a at both 298 K and 273 K are the highest values among the reported metal–organic frameworks, meaning that there is bright potential forZJU-198a in hydrocarbon storage and separation.