膜分离材料分子设计及其在石化工业的应用进展

Molecular Design of Membrane Separation Materials and Their Application in Petrochemical Industry

面向石油化工领域广阔的应用市场和众多的分离对象,从致密膜分离过程的溶解-扩散机理出发,阐述了有机溶剂在高分子膜内与渗透过程相关的溶解性、扩散性推算模型,提出膜分离材料的设计方法。在此基础上,以芳烃/烷烃混合物为分离对象,介绍了离子液体支撑液膜在该领域的研究开发现状和发展前景;以清洁燃料油品加工为对象,分析了膜法汽油脱硫技术与工艺。与传统分离技术相比,膜分离过程具有操作简便、分离效率高、能耗低、环境友好等特点。随着膜内传质理论发展与新型膜分离材料制备技术的进步,利用膜分离技术简化石化工业流程,实现节能降耗与绿色工艺改造,存在巨大的市场空间和发展前景。

In order to apply membrane separation in petrochemical industry for the huge market space and the varieties of organic mixtures,the research and development status of membrane design technology based on the solution-diffusion mechanism was reviewed,including the mathematical models for estimations of solubilities and diffusion coefficients of organic solvents in polymer systems.The development of supported ionic liquid membranes for the separation of aromatic/paraffin mixture and the application of the membrane separation in gasoline desulfurization processes were also introduced.Compared with the conventional purification processes,membrane separation characterizes easy operation,high efficiency,low energy consumption and environmental friendship.With the advances of mass transfer theory for dense membrane and the successes in manufacture of novel specific membranes,a huge application market for membrane separation is coming to simplify refining processes and save energy in the future.