A stable metal-organic framework with well-matched pore cavity for efficient acetylene separation
A stable metal-organic framework with well-matched pore cavity for efficient acetylene separation
复制标题
稳定的金属有机骨架，具有匹配的孔腔，可实现高效乙炔分离
DOI：
10.1002/aic.17152
复制
发表时间：
2021-03-02
期刊：
影响因子：
3.7
通讯作者：
Mu, Bin
中科院分区：
文献类型：
--
作者：
Chen, Yang;Du, Yadan;Mu, Bin
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。从其副产物混合物中分离C2 H2仍然是一个耗能的过程，并且仍然具有挑战性。在这里，我们提出了一种金属-有机框架[Zn-2（bpy）（btec）]，具有理想的孔几何形状和稳定的框架，这表明C2 H2从模拟混合物中的高分离性能。Zn-2（bpy）（btec）在298 K和1 atm下具有最高的C_2H_2/C_2H_4和C_2H_2/CO_2吸收比、非常高的吸附选择性和适度的C_2H_2吸收（93.5 cm ~ 3/cm ~ 3）。不仅直接生产高纯度的C_2H_4，而且在再生过程中回收高纯度的C_2H_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以大规模直接合成，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C2 H2分离的前景。
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[Zn-2(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, Zn-2(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 cm(3)/cm(3) 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, Zn-2(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.