没食子酸
乙烯
化学
金属
吸附
选择性
金属有机骨架
之字形的
化学工程
材料科学
有机化学
物理化学
核化学
催化作用
工程类
数学
几何学
作者
Zongbi Bao,Jiawei Wang,Zhiguo Zhang,Huabin Xing,Qiwei Yang,Yiwen Yang,Hui Wu,Rajamani Krishna,Wei Zhou,Banglin Chen,Qilong Ren
标识
DOI:10.1002/anie.201808716
摘要
Abstract Purification of C 2 H 4 from an C 2 H 4 /C 2 H 6 mixture, one of the most important while challenging industrial separation processes, is mainly through energy‐intensive cryogenic distillation. Now a family of gallate‐based metal–organic framework (MOF) materials is presented, M‐gallate (M=Ni, Mg, Co), featuring 3D interconnected zigzag channels, the aperture sizes of which (3.47–3.69 Å) are ideally suitable for molecular sieving of ethylene (3.28×4.18×4.84 Å 3 ) and ethane (3.81×4.08×4.82 Å 3 ) through molecular cross‐section size differentiation. Co‐gallate shows an unprecedented IAST selectivity of 52 for C 2 H 4 over C 2 H 6 with a C 2 H 4 uptake of 3.37 mmol g −1 at 298 K and 1 bar, outperforming the state‐of‐the‐art MOF material NOTT‐300. Direct breakthrough experiments with equimolar C 2 H 4 /C 2 H 6 mixtures confirmed that M‐gallate is highly selective for ethylene. The adsorption structure and mechanism of ethylene in the M‐gallate was further studied through neutron diffraction experiments.
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