Type 3 Porous Liquids for the Separation of Ethane and Ethene
Type 3 Porous Liquids for the Separation of Ethane and Ethene
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DOI：
10.1021/acsami.0c19044
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发表时间：
2021-01-13
影响因子：
9.5
通讯作者：
James, Stuart L.
中科院分区：
文献类型：
--
作者：
Lai, Beibei;Cahir, John;James, Stuart L.
我们评估的潜力，制定一个多孔液体，可用作选择性溶剂的乙烷和乙烯的分离。乙烷-乙烯的分离是通过低温蒸馏进行的，但这需要大量的能量。对乙烷或乙烯具有选择性的溶剂可以潜在地使得能够开发更有效的基于液体的分离方法，但是迄今为止，这样的溶剂一直是难以捉摸的。在这里，3型多孔液体，其中包括微孔固体分散在尺寸排除的液相，是专门为乙烷和乙烯的分离。对于分散在含银离子液体中的沸石阿加，实现了乙烯对乙烷的高选择性（在0.8巴下为25.6）和高容量。对于液相来说，不寻常的是，乙烷相对于乙烯的选择性（在0.8巴下为2.55）也可以使用分散在芝麻油中的金属有机骨架（MOF）Cu（Qc）（2）（Qc =喹啉-5-羧酸酯）或芝麻油中的ZIF-7来实现，后者显示门控摄取。通过开发机械化学方法提高了Cu（Qc）（2）的合成效率。还证明了Cu（Qc）（2）在芝麻油中和ZIF-7在芝麻油中的再生，表明这些或类似的多孔液体可以潜在地应用于循环分离过程。
We assess the potential for formulating a porous liquid that could be used as a selective solvent for the separation of ethane and ethene. Ethane-ethene separation is performed on very large scales by cryogenic distillation, but this uses large amounts of energy. Solvents that are selective to ethane or ethene could potentially enable more efficient liquid-based separation processes to be developed, but to date such solvents have been elusive. Here, Type 3 porous liquids, which consist of microporous solids dispersed in size-excluded liquid phases, were tailored toward the separation of ethane and ethene. A high selectivity for ethene over ethane (25.6 at 0.8 bar) and a high capacity was achieved for zeolite AgA dispersed in an Ag-containing ionic liquid. Unusually for liquid phases, the selectivity for ethane over ethene (2.55 at 0.8 bar) could also be achieved using either the metal-organic framework (MOF) Cu(Qc)(2) (Qc = quinoline-5-carboxylate) dispersed in sesame oil or ZIF-7 in sesame oil, the latter showing gated uptake. The efficiency of the Cu(Qc)(2) synthesis was increased by developing a mechanochemical method. The regeneration of Cu(Qc)(2) in sesame oil and ZIF-7 in sesame oil was also demonstrated, suggesting that these or similar porous liquids could potentially be applied in cyclic separation processes.