锶长石微晶玻璃转晶制备SSZ-13分子筛膜

doi:10.19964/j.issn.1006-4990.2024-0240

Abstract

Abstract:

SSZ-13 zeolite membrane is widely used in the separation of light gases，such as CO₂/CH₄，CO₂/N₂，due to its special pore structure，CO₂ adsorption and good thermal stability.Strontium feldspar，as an aluminosilicate feldspar，is an ideal material for the rapid and efficient preparation of SSZ-13 zeolite membranes because of its double six-membered ring structure necessary for the synthesis of SSZ-13 zeolite in its crystal structure.SSZ-13 zeolite seeds were prepared by crystal transformation using strontium feldspar as raw material，and then SSZ-13 zeolite membranes for gas separation were successfully prepared on α-Al₂O₃ and strontium feldspar supports by secondary growth method.The structure and properties of the samples were characterized by XRD，SEM，N₂ adsorption and desorption.The single-component gas permeation flux and gas selectivity of CO₂and CH₄ were carried out on the SSZ-13 zeolite membrane prepared by strontium feldspar crystal transformation.The results showed that the permeation flux of CO₂ by SSZ-13 zeolite membrane in this study was 1.827×10^-6~2.539×10^-6 mol/（m²·s·Pa），while the permeation flux of CH₄ was below 1×10^-7 mol/（m²·s·Pa）.The zeolite membrane with excellent gas separation performance was prepared.Compared with the traditional synthesis method，the strontium feldspar raw material and the secondary growth method used in this study significantly increased the crystallization rate and reduced the production cost and energy consumption.Therefore，it had broad development prospects in the field of preparing zeolite membrane for gas separation.

Key words: strontium feldspar, SSZ-13 zeolites membrane, crystal transformation method, gas separation

CLC Number:

TQ115

GUO Yingjun, WU Songsong, DING Chunyan, ZHAO Shikai, SONG Tao, WEN Guangwu. Preparation of SSZ-13 zeolite membrane from glass-ceramics-strontium feldspar by crystal transformation method[J]. Inorganic Chemicals Industry, 2025, 57(2): 76-82.

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Preparation of SSZ-13 zeolite membrane from glass-ceramics-strontium feldspar by crystal transformation method

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