A Novel Method for Preparation of Silicalite-1 Zeolite Membrane in Vapor Phase

Abstract

Abstract: Asilicalite 1 zeolite membrane was in situ crystallized from a layer of silica species prepared by a novel method of low temperature chemical vapor deposition (LTCVD) on a porous cordierite substrate. XRDpatterns show that the membrane consists of MFItype zeolite crystals. The investigation with SEMindicats that the membrane is about 50 μm thick, and covered with well intergrowth MFIzeolite crystals of about 10 μm in size. The EDXanalysis confirms that the membrane is composed of silica in the absence of Al, indicating high silica MFI(Silicalite-1) zeolite grown on the support. The ratio of pure gas permeation is 296 for H₂/ iso butane and 13.7 for n / iso butane at room temperature respectively, confirming that the membrane synthesized on the support of cordierite is high quality without pinhole.

Key words: Zeolite membrane, LTCVD, Silicalite-1, Cordierite, Gas permeation

CLC Number:

O612

TrendMD:

LI Jun, LONG Ying Cai . A Novel Method for Preparation of Silicalite-1 Zeolite Membrane in Vapor Phase[J]. Chem. J. Chinese Universities, 2001, 22(2): 179.

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A Novel Method for Preparation of Silicalite-1 Zeolite Membrane in Vapor Phase

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