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One-of-a-kind: a microporous metal–organic framework capable of adsorptive separation of linear, mono- and di-branched alkane isomers via temperature- and adsorbate-dependent molecular sieving†
Energy & Environmental Science ( IF 32.5 ) Pub Date : 2018-03-29 00:00:00 , DOI: 10.1039/c8ee00459e
Hao Wang 1, 2, 3, 4 , Xinglong Dong 5, 6, 7, 8, 9 , Ever Velasco 1, 2, 3, 4 , David H. Olson 1, 2, 3, 4 , Yu Han 5, 6, 7, 8, 9 , Jing Li 1, 2, 3, 4
Affiliation  

Separation of alkane isomers represents a crucial process in the petrochemical industry in order to achieve a high octane rating of gasoline. Herein, we report the first example of complete separation of linear, monobranched and dibranched alkane isomers using a single adsorbent. A calcium-based robust microporous metal–organic framework, Ca(H2tcpb) (tcpb = 1,2,4,5-tetrakis(4-carboxyphenyl)-benzene), exhibits unique molecular exclusion behavior which enables full separation of binary or ternary mixtures of alkane isomers into the pure form of each isomerate. The successful separation of monobranched and dibranched alkane isomers will not only lead to the production of higher quality gasoline with maximum possible octane numbers but also fill the gap in the current separation technology. Exploration of the separation mechanism indicates that the structural flexibility and adsorbate-dependent structural change of the porous framework play a vital role in the observed temperature-dependent molecular sieving property of the adsorbent.

中文翻译:

一种:一种微孔金属有机骨架,能够通过依赖于温度和吸附物的分子筛来吸附分离线性,单支和双支链烷烃异构体

为了实现汽油的高辛烷值,烷烃异构体的分离代表了石化行业的关键过程。本文中,我们报告了使用单一吸附剂完全分离线性,单支链和二支链烷烃异构体的第一个实例。钙基坚固的微孔金属-有机骨架,Ca(H 2tcpb)(tcpb = 1,2,4,5-四(4-羧基苯基)-苯),表现出独特的分子排斥行为,能够将烷烃异构体的二元或三元混合物完全分离成每种异构体的纯净形式。单支链和二支链烷烃异构体的成功分离不仅将导致生产具有最大可能辛烷值的高质量汽油,而且将填补当前分离技术中的空白。对分离机理的探索表明,多孔骨架的结构柔韧性和与吸附物有关的结构变化在所观察到的吸附剂与温度有关的分子筛特性中起着至关重要的作用。
更新日期:2018-03-29
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