基于金属有机框架材料的C2烃类吸附分离研究进展

乙烷、乙烯、乙炔这3种C2烃类在石油化工领域应用广泛，其分离纯化过程是进行化工生产的一个重要步骤．因C2烃类物理性质与分子尺寸都比较接近，对其进行分离提纯是分离领域的难题，目前工业上采用的主要是低温蒸馏法，但其能耗大，对设备要求高；吸附分离法被认为是一种能够降低能耗的有效手段，作为吸附剂的金属有机框架（MOFs）材料因其结构多样，比表面积高，孔道易于设计和功能化而备受关注，同时被认为在C2烃类节能分离领域具有很好的应用前景．本文对近年来基于MOFs材料的C2烃类吸附分离的研究作了归纳总结，主要从MOFs材料结构与分离性能间的关系出发，以不同的分离机制对C2烃类的分离作了介绍说明，探讨了其所存在的问题，并进行了展望． 

Adsorption and separation of C2 hydrocarbons based on metal organic frameworks: research progress

C2 hydrocarbons including ethane, ethylene and acetylene are widely used in petrochemical industry, their separation and purification is an important process in chemical production．Due to rather similar physical properties and molecular sizes, separation and purification of C2 hydrocarbons are extremely difficult．Cryogenic distillation is the main method used in current industry, which is extensively energy-consuming and require special equipment．Separation based on physical adsorption is regarded as economical with low energy demand．Porous adsorbents of metal organic-frameworks (MOFs), with diverse structure, high surface area, designable and functionable aperture, are considered most promising in C2 separation．In this review, researches on adsorption and separation of C2 hydrocarbons based on MOF in recent years are summarized, with a focus on relationship between structure and separation capacity．The mechanisms of these C2 separation process are discussed．