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A stable metal–organic framework with well‐matched pore cavity for efficient acetylene separation
AIChE Journal ( IF 3.5 ) Pub Date : 2021-01-05 , DOI: 10.1002/aic.17152
Yang Chen 1 , Yadan Du 1 , Yong Wang 1 , Rajamani Krishna 2 , Libo Li 1, 3 , Jiangfeng Yang 1, 3 , Jinping Li 1, 3 , Bin Mu 4
Affiliation  

Acetylene, an important petrochemical feedstock, is the starting chemical to produce many polymer products. Separating C2H2 from its by‐product mixtures is still an energy‐consuming process and remains challenging. Here, we present a metal–organic framework[Zn2(bpy)(btec)], with a desirable pore geometry and stable framework, which demonstrated a high separation performance of C2H2 from simulated mixtures. With the desirable pore dimension and hydrogen bonding sites, Zn2(bpy)(btec) shows by far the both highest C2H2/C2H4 and C2H2/CO2 uptake ratios, very high adsorption selectivities and moderately C2H2 uptake of 93.5 cm3/cm3 under 298 K and 1 atm. Not only straightforwardly produced high purity of C2H4, but also recovered high purity of C2H2 (>98%) in the regeneration process (>92% recovery). More notably, Zn2(bpy)(btec) can be straightforwardly synthesized at a large scale under environmentally friendly conditions, and its good water/chemical stability, thermostability, and cyclic stability highlight the promise of this molecular sieving material for industrial C2H2 separation.

中文翻译:

具有良好匹配的孔腔的稳定的金属-有机骨架,可有效分离乙炔

乙炔是一种重要的石油化工原料,是生产许多聚合物产品的起始化学品。从副产物混合物中分离出C 2 H 2仍然是一个耗能的过程,并且仍然具有挑战性。在这里,我们介绍了一种金属-有机骨架[Zn 2(bpy)(btec)],具有理想的孔几何形状和稳定的骨架,证明了C 2 H 2从模拟混合物中的高分离性能。Zn 2(bpy)(btec)具有理想的孔尺寸和氢键结合位点,迄今为止显示出最高的C 2 H 2 / C 2 H 4和C 2 H 2/ CO 2吸收比,极高的吸附选择性和在298 K和1个大气压下适度的C 2 H 2吸收93.5 cm 3 / cm 3。不仅直接产生了高纯度的C 2 H 4,而且还在再生过程中回收了高纯度的C 2 H 2(> 98%)(回收率> 92%)。更值得注意的是,Zn 2(bpy)(btec)可以在环境友好的条件下直接大规模地合成,并且其良好的水/化学稳定性,热稳定性和循环稳定性突出了这种分子筛材料用于工业C 2 H的前景。2个 分离。
更新日期:2021-01-05
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