Reversed ethane/ethylene adsorption in a metal–organic framework via introduction of oxygen  

作　　者：Ling Yang Wei Zhou Hao Li Ali Alsalme Litao Jia Jiangfeng Yang Jinping Li Libo Li Banglin Chen 

机构地区：[1]College of Chemistry and Chemical Engineering,Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan University of Technology,Taiyuan 030024,China [2]NIST Center for Neutron Research,National Institute of Standards and Technology,Gaithersburg,MD 20899-6102,United States [3]Department of Chemistry,University of Texas at San Antonio,One UTSA Circle,San Antonio,TX 78249-0698,United States [4]Chemistry Department,College of Science,King Saud University,P O Box 2455,Riyadh 11451,Saudi Arabia [5]State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030024,China [6]Key Laboratory of Coal Science and Technology,Taiyuan University of Technology,Taiyuan 030024,China [7]Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan 030024,China

出　　处：《Chinese Journal of Chemical Engineering》2020年第2期593-597,共5页中国化学工程学报（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(Nos.21606163 and 21878205);Coal Bed Methane Joint Foundation of Shanxi(2016012006);Foundation of State Key Laboratory of Coal Conversion(J18-19-610);Welch Foundation(grant AX-1730);the Distinguished Scientist Fellowship Program(DSFP)at KSU.

摘　　要：Separation of ethane from ethylene is a very important but challenging process in the petrochemical industry.Finding an alternative method would reduce the energy needed to make 170 million tons of ethylene manufactured worldwide each year.Adsorptive separation using C2H6-selective porous materials to directly produce high-purity C2H4 is more energy-efficient.We herein report the"reversed C2H6/C2H4 adsorption"in a metal–organic framework Cr-BTC via the introduction of oxygen on its open metal sites.The oxidized Cr-BTC(O2)can bind C2H6 over C2H4 through the active Cr-superoxo sites,which was elucidated by the gas sorption isotherms and density functional theory calculations.This material thus exhibits a good performance for the separation of 50/50 C2H6/C2H4 mixtures to produce 99.99%pure C2H4 in a single separation operation.

关 键 词：Metal–organic frameworks ADSORPTIVE separation Open METAL sites Reversed ethane/ethylene ADSORPTION Density-functional theory calculation BREAKTHROUGH curves 

分 类 号：TQ221.211[化学工程—有机化工]