Pore Chemistry and Size Control in Hybrid Porous Materials for Acetylene Capture from Ethylene

Published

May 20, 2016

Author(s)

Xili Cui, Kaijie Chen, Huabin Xing, Qiwei Yang, Rajamani Krishna, Zongbi Bao, Hui Wu, Wei Zhou, Xinglong Dong, Yu Han, Bin Li, Qilong Ren, Michael J. Zaworotko, Banglin Chen

Abstract

The trade-off between physical adsorption capacity and selectivity of porous materials is a major barrier for efficient gas separation and purification through physisorption. We report control over pore chemistry and size in copper coordination networks with SiF₆^2- and organic linkers for the preferential binding and orderly assembly of acetylene molecules through cooperative host-guest and/or guest-guest interactions. The specific binding sites for acetylene are validated by modeling and neutron powder diffraction studies. The energies associated with these binding interactions afford high adsorption capacity (2.1 mmol/g at 0.025 bar) and selectivity (39.7 to 44.8) for acetylene at ambient conditions. Their efficiency for the separation of acetylene/ethylene mixtures is demonstrated by experimental breakthrough curves (0.73 mmol/g form 1/99 mixture).

Citation

Science

Volume

353

Issue

6295

Pub Type

Journals

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Keywords

metal-organic framework, gas separation

Citation

Cui, X. , Chen, K. , Xing, H. , Yang, Q. , Krishna, R. , Bao, Z. , Wu, H. , Zhou, W. , Dong, X. , Han, Y. , Li, B. , Ren, Q. , Zaworotko, M. and Chen, B. (2016), Pore Chemistry and Size Control in Hybrid Porous Materials for Acetylene Capture from Ethylene, Science, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=920794 (Accessed April 26, 2024)