Metal confined in metal-organic framework-based mixed matrix membranes for efficient butadiene recognition separation  

作　　者：Xixi Cen Yuxiu Sun Caijiao Yu Zhihua Qiao Chongli Zhong 

机构地区：[1]State Key Laboratory of Separation Membranes and Membrane Processes,Tiangong University,Tianjin,China [2]School of Textile Science and Engineering,Tiangong University,Tianjin,China [3]School of Chemical Engineering and Technology,Tiangong University,Tianjin,China

出　　处：《Aggregate》2023年第5期174-181,共8页聚集体（英文）

基　　金：the National Key R&D Program of China(grant number:2021YFB3802200);the Natural Science Foundation of China(grant number:22038010).

摘　　要：The efficient separation of butadiene(1,3-C_(4)H_(6))from C_(4)hydrocarbons is a critical step in petrochemical processes.However,the traditional cryogenic distillation suffers from energy-intensity and serious environmental stress,necessitating the development of alternative technologies for efficient 1,3-C_(4)H_(6)separation.Herein,a 1,3-C_(4)H_(6)recognition mixed matrix membrane is reported via incorporating metal copper encapsulated a metal-organic framework(CuBTC@Cu)into elastic poly(dimethylsiloxane)(PDMS).The resulting CuBTC@Cu/PDMS membrane can efficient separate 1,3-C_(4)H_(6)from various C_(4)hydrocarbons including 1,3-C_(4)H_(6)/n-C_(4)H_(8),1,3-C_(4)H_(6)/iso-C_(4)H_(8),1,3-C_(4)H_(6)/n-C_(4)H_(10)and 1,3-C_(4)H_(6)/iso-C_(4)H_(10),yielding superior selectivity of 5.11,6.35,4.78,and 10.30,respectively,with 1,3-C_(4)H_(6)permeability of 53240 Barrer.Notably,the appropriateπ-complexation interaction between butadiene molecules and CuBTC@Cu as well as suitable transmission channel size enable the membrane only permeable to 1,3-C_(4)H_(6)and block the permeation of other C_(4)hydrocarbons,showing a unique 1,3-C_(4)H_(6)recognition behavior in membrane separation.The concept of affinity-relying separation combining molecular sieving would open a new direction for designing gas membranes for efficient light hydrocarbon separations.

关 键 词：BUTADIENE C4 hydrocarbons metal copper metal-organic framework mixed matrix membrane 

分 类 号：O62[理学—有机化学]