A MOF built on 8-connected Y_(3) nodes demonstrates simultaneous reverse adsorptive separation: ethane over ethylene and propane over propylene  

作　　者：Lu-Lu Ma Jiaqi Liu Kang Zhou Zixuan Cao Jiafeng Miao Guo-Ping Yang Yao-Yu Wang Jing Li Hao Wang 

机构地区：[1]Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education,Shaanxi Key Laboratory of Physico-Inorganic Chemistry,College of Chemistry&Materials Science,Northwest University,Xi’an 710127,China [2]Hoffmann Institute of Advanced Materials,Shenzhen Polytechnic University,Shenzhen 518055,China [3]Shenzhen Senior High School,Shenzhen 518040,China [4]Department of Chemistry and Chemical Biology,Rutgers University,Piscataway,NJ 08854,USA

出　　处：《Science China Chemistry》2024年第11期3657-3661,共5页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (22071194, 22371225, 21971207);Shenzhen Science and Technology Program (KCXFZ20211020163818026);supported by the U.S. Department of Energy, Basic Energy Sciences, Division of Materials Sciences and Engineering (DE-SC0019902)。

摘　　要：Selective adsorption of paraffins over olefins(mostly C2 and C3) by porous solids could offer tremendous advantages for the purification of olefins, which is, however, challenging as it has stringent requirements on the pore dimensions and pore surface chemistry of the adsorbent. We report here a metal-organic framework(MOF) with novel topology, Y_(3)(μ_(3)-OH)(TCMPB)2(denoted as HIAM-316, TCMPB^(4-)= 1,2,4,5-tetra(4-carboxy-3-methylphenyl)benzene), which shows reversed separation of C_(2)H_(6)/C_(2)H_(4) and C_(3)H_(8)/C_(3)H_(6) simultaneously. The ideal adsorbed solution theory(IAST) selectivities for equimolar binary mixtures of C_(2)H_(6)/C_(2)H_(4) and C_(3)H_(8)/C_(3)H_(6) were calculated to be 1.67 and 1.23 at 1 bar and 298 K for HIAM-316. Its capability of removing paraffines from paraffin/olefin mixtures is validated by breakthrough measurements. Molecular simulations reveal that the preferential adsorption of paraffins over olefins by HIAM-316 may be attributed to the abundant carboxylate oxygen atoms along its channel.

关 键 词：metal-organic framework adsorption separation 

分 类 号：O623.1[理学—有机化学] O647.3[理学—化学]