Volume 133, Issue 9 pp. 4620-4624
Zuschrift

Adsorption Site Selective Occupation Strategy within a Metal–Organic Framework for Highly Efficient Sieving Acetylene from Carbon Dioxide

Lingzhi Yang

Lingzhi Yang

State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580 P. R. China

Search for more papers by this author
Dr. Liting Yan

Dr. Liting Yan

Key Laboratory of Processing and Testing Technology of Glass & Functional Ceramics of Shandong Province, School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353 P. R. China

Search for more papers by this author
Dr. Ying Wang

Dr. Ying Wang

Key Laboratory of Macromolecular Science of Shaanxi Province, Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi'an, Shaanxi, 710062 P. R. China

Search for more papers by this author
Zhi Liu

Zhi Liu

State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580 P. R. China

Search for more papers by this author
Jiangxiu He

Jiangxiu He

State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580 P. R. China

Search for more papers by this author
Qiuju Fu

Qiuju Fu

State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580 P. R. China

Search for more papers by this author
Dr. Dandan Liu

Dr. Dandan Liu

Institute of New Energy, China University of Petroleum (East China), Qingdao, 266580 P. R. China

Search for more papers by this author
Dr. Xin Gu

Dr. Xin Gu

Institute of New Energy, China University of Petroleum (East China), Qingdao, 266580 P. R. China

Search for more papers by this author
Dr. Pengcheng Dai

Dr. Pengcheng Dai

Institute of New Energy, China University of Petroleum (East China), Qingdao, 266580 P. R. China

Search for more papers by this author
Dr. Liangjun Li

Dr. Liangjun Li

Institute of New Energy, China University of Petroleum (East China), Qingdao, 266580 P. R. China

Search for more papers by this author
Prof. Xuebo Zhao

Corresponding Author

Prof. Xuebo Zhao

State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580 P. R. China

Key Laboratory of Processing and Testing Technology of Glass & Functional Ceramics of Shandong Province, School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353 P. R. China

Search for more papers by this author
First published: 27 October 2020
Citations: 36

Abstract

The separation of acetylene and carbon dioxide is an essential but challenging process owing to the similar molecular sizes and physical properties of the two gas molecules. Notably, these molecules usually exhibit different orientations in the pore channel. We report an adsorption site selective occupation strategy by taking advantage of differences in orientation to sieve the C2H2 from CO2 in a judiciously designed amine-functionalized metal–organic framework, termed CPL-1-NH2. In this material, the incorporation of amino groups not only occupies the adsorption sites of CO2 molecules and shields the interaction of uncoordinated oxygen atom and CO2 molecules resulting in a negligible adsorption amount and a decrease in enthalpy of adsorption but also strengthened the binding affinity toward C2H2 molecules. This material thus shows an extremely high amount of C2H2 at low pressure and a remarkably high C2H2/CO2 IAST selectivity (119) at 1 bar and 298 K.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.