新型优先吸附乙烷的柱撑式双配体MOFs材料及增强乙烷乙烯吸附分离机制

针对石油化工高压低温精馏法分离乙烯乙烷存在高能耗问题，研发常温高效分离乙烯/乙烷技术是一个极具挑战和应用价值的课题。本项目主要研究具有优先吸附乙烷特性、高选择性和高吸附容量的新型柱撑式双配体MOFs材料及乙烯/乙烷吸附分离机制，这是项目特色和重要创新之处。主要涉及：理论上研究柱撑式双配体MOFs多孔材料拓扑孔道结构和表面化学对乙烯/乙烷吸附相平衡、动力学和选择性的关系，尤其是其拓扑空间孔道和表面氢键吸附作用力强化乙烯/乙烷选择性作用机制；技术层面上，研究配体组成对柱撑式双配体MOFs孔道结构和表面化学的影响规律，研制出高乙烯/乙烷选择性和吸附容量的分离材料；在分离过程层面，建立以新型柱撑式双配体MOFs为核心的乙烯乙烷吸附分离过程。项目成果有助于发展和形成新的常温高效分离乙烯乙烷技术，从应用层面上为高效吸附分离乙烯乙烷，提供新理论和新技术基础。

In petrochemical industries, ethylene-ethane separation is typically carried out by cryogenic distillation, which is an energy-intensive and capital-intensive process. Developing an effective ethylene–ethane separation technology under ambient conditions is a challenging and valuable research subject. The proposal aims at the development of ethane-trapping pillared-layer MOFs with high ethylene-ethane uptake and selectivity. In this proposed research, we will focus on (I) Fundamental understanding of the effects of the topology structure, surface.properties of pillared-layer MOFs on its adsorption capacity, kinetics, and selectivity for ethylene-ethane mixture. Specially, tuning the topology structure of pillared-layer MOFs and hydrogen bonding forces to enhance their separation performance on the ethylene-ethane mixture. (II) Investigating the effects of ligand components on the topology structure and surface properties of pillared-layer MOFs, and developing novel pillared-layer MOFs with high ethylene-ethane adsorption capacity and selectivity; (III) Investigating the dynamic separation performance of pillared-layer MOFs for ethylene-ethane adsorption separation, modeling and optimizing the adsorption separation process of ethylene-ethane. The proposed work will develop a highly efficient ethylene-ethane separation technology based on novel pillared-layer MOFs. In the aspect of industrial application, it will provide new theories and technologies for efficient separation of ethylene-ethane.