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分离过程是化学工业的关键步骤,也是能耗和物耗最为集中的过程,占全部工业能耗的近50%[1]。特别是乙烯、乙炔和丙烯等大宗基础化学品的生产过程,当前仍主要依赖于深冷精馏等高耗能分离技术,亟待发展高效分离技术。吸附和膜分离等相关技术的进步有望显著降低分离过程能耗[1,2]。在结构相似化合物的分离过程中,吸附剂和膜等分离材料通常存在选择性和容量(渗透率)难以兼具的问题。例如在乙烯和乙炔的吸附分离
The separation process is a key step in the chemical industry, as well as the most energy-intensive and material-intensive process, accounting for nearly 50% of the total industrial energy consumption [1]. In particular, the production of bulk basic chemicals such as ethylene, acetylene and propylene still rely mainly on high-energy separation technologies such as cryogenic rectification, and the development of efficient separation technologies is urgently needed. Adsorption and membrane separation and other related technologies are expected to significantly reduce the energy consumption of the separation process [1,2]. In the separation of structurally similar compounds, separation materials such as adsorbents and membranes generally have the problem that it is difficult to combine both selectivity and capacity (permeability). For example, ethylene and acetylene adsorption separation