Preparation method for carbon-based zeolite molecular sieve composite separation membrane

Abstract

The invention discloses a preparation method for a carbon-based zeolite molecular sieve composite separation membrane. The preparation method comprises the following concrete steps: with phenolic resin as a raw material, preparing a binder, a pore-forming agent and the like, uniformly mixing the phenolic resin, the binder, the pore-forming agent and the like, carrying out extrusion on a molding machine so as to form a tubular original membrane, and carrying out natural drying and carbonization treatment so as to prepare a tubular carbon supporting membrane; synthesizing a zeolite molecular sieve sol from Al2O3, SiO2, Na2O, H2O and EtOH in a certain molar ratio according to a certain addition order under the condition of stirring through a feeding method; placing the tubular carbon supporting membrane into a crystallization vessel filled with the zeolite molecular sieve sol, placing the crystallization vessel into an oven, carrying out crystallization, taking a crystallized membrane outof the oven, carrying out quenching, cleaning and drying, and removing a template agent so as to prepare the carbon-based zeolite molecular sieve composite separation membrane. The invention relatesto the technical field of zeolite molecular sieve composite membranes. The preparation method provided by the invention has the following advantages: a layer of a zeolite molecular sieve material is compounded onto the surface of a carbon supporting body, so the pore structure of the surface of a carbon membrane can be controlled; the gas permeability of the carbon membrane is improved; and a separation membrane with good oxidation resistance can be prepared.

Description

technical field [0001] The invention relates to the technical field of zeolite molecular sieve composite membranes, in particular to a method for preparing a carbon-based zeolite molecular sieve composite separation membrane. Background technique [0002] Zeolite molecular sieve membrane is a new type of microporous inorganic membrane material developed in recent years. Because of its good chemical and mechanical stability, it can meet the requirements of high flux, high selectivity, heat resistance and solvent resistance. People pay attention to it, and it has quickly become the most promising research hotspot in the field of membrane separation. Zeolite molecular sieve has unique physical and chemical properties, high temperature resistance, corrosion resistance, especially its excellent gas separation performance and great application prospects in membrane reactors. [0003] Because inorganic membranes have many excellent properties, they have become a non-negligible and...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a method for preparing a carbon-based zeolite molecular sieve composite separation membrane, which solves the problem that most of the actually used carbon membranes have relatively large pore diameters, resulting in a low separation rate of the membrane and failing to achieve the ideal separation effect , In addition, although the carbon membrane has good acid and alkali resistance, uniform pore size, adjustable outer surface, but its poor oxidation resistance