A Molecular Compound for Highly Selective Purification of Ethylene
A Molecular Compound for Highly Selective Purification of Ethylene
复制标题
一种用于高选择性纯化乙烯的分子化合物
DOI：
10.1002/anie.202109338
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Dias, H. V. Rasika
中科院分区：
文献类型：
--
作者：
Noonikara‐Poyil, Anurag;Cui, Hui;Yakovenko, Andrey A.;Stephens, Peter W.;Lin, Rui‐Biao;Wang, Bin;Chen, Banglin;Dias, H. V. Rasika
从C2H4/C2H6混合物中提纯C2H4是最具挑战性的分离过程之一，工业上主要通过高耗能的低温蒸馏来实现。可持续的、非蒸馏的方法是非常理想的替代方法。我们发现含氟双(吡唑基)硼配体负载的铜(I)配合物[[(CF3)2BP]Cu}3在烯烃-石蜡分离材料中具有非常理想的性质。它只在乙烷生成[(CF3)2BP]铜(C2H4)的情况下与乙烯结合。这种分子化合物表现出极高的理想吸附溶液理论C2H4/C2H6气体分离选择性，提供了高纯度(>；99.5 %)乙烯，可以很容易地从分离柱上解吸出来。原位X射线衍射仪提供了[(CF3)2BP]Cu(C2H4)与无乙烯的固体吸附剂在C2H4存在或去除的驱动下发生可逆转化的现场照片。还给出了三核[(CF3)2BP]铜}3和单核[(CF3)2BP]铜(C2H4)的分子结构。
Purification of C2H4from an C2H4/C2H6mixture is one of the most challenging separation processes, which is achieved mainly through energy‐intensive, cryogenic distillation in industry. Sustainable, non‐distillation methods are highly desired as alternatives. We discovered that the fluorinated bis(pyrazolyl)borate ligand supported copper(I) complex {[(CF3)2Bp]Cu}3has features very desirable in an olefin–paraffin separation material. It binds ethylene exclusively over ethane generating [(CF3)2Bp]Cu(C2H4). This molecular compound exhibits extremely high and record ideal adsorbed solution theory (IAST) C2H4/C2H6gas separation selectivity, affording high purity (>99.5 %) ethylene that can be readily desorbed from separation columns. In‐situ PXRD provides a “live” picture of the reversible conversion between [(CF3)2Bp]Cu(C2H4) and the ethylene‐free sorbent in the solid‐state, driven by the presence or removal of C2H4. Molecular structures of trinuclear {[(CF3)2Bp]Cu}3and mononuclear [(CF3)2Bp]Cu(C2H4) are also presented.