Inorganic Chemicals Industry ›› 2021, Vol. 53 ›› Issue (12): 54-60.doi: 10.19964/j.issn.1006-4990.2021-0390

• Reviews and Special Topics • Previous Articles     Next Articles

Research progress on preparation and application of b-axis oriented MFI zeolite membranes

YUAN Biao(),WU Wei,LUO Chao,SHEN Peng,CHEN Zan   

  1. CenerTech Tianjin Chemical Research and Design Institute Co.,Ltd.,Tianjin 300131,China
  • Received:2021-07-21 Online:2021-12-10 Published:2021-12-16

Abstract:

Zeolite membrane is a new type of inorganic membrane,which has the advantages of regular pore structure,good chemical and thermal stability,high mechanical strength,good pollution resistance and easy modification.b-axis oriented MFI zeolite membrane has wide application prospect in membrane separation and membrane reactor,because it can shorten the mass transfer path,reduce the mass transfer resistance and improve the diffusion efficiency,which has been widely con-cerned by scholars at home and abroad.In this paper,the preparation and application of b-axis oriented zeolite membranes were reviewed.The in-situ hydrothermal synthesis,secondary growth,microwave-assisted synthesis,gel-free method,powder conversion method and nanosheet method were introduced in detail.The secondary growth method could control the micro-structure of zeolite membrane,which was less affected by the surface properties of support.Microwave-assisted method could shorten crystallization time and reduce energy consumption,which was of great significance for industrial production.The gel-free method had the advantages of simple preparation process and environmental friendliness.On the basis of the above meth-ods,the membrane thickness could be reduced by using nanosheets as crystal seeds.Finally,the development prospect of b-axis oriented MFI zeolite membrane was prospected.There were still many challenges in the preparation of b-axis oriented continuous and defect-free MFI zeolite membranes.It included improving the mechanical strength and long-term stability of membranes and achieving the preparation of oriented membranes on the roughness or bending and large-scale support surface.

Key words: b-axis, MFI zeolite membranes, preparation, separation, catalysis

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