二次生长法合成SAPO-34沸石膜及其气体渗透性能

硅酸盐通报 ›› 2009, Vol. 28 ›› Issue (5): 887-892.

二次生长法合成SAPO-34沸石膜及其气体渗透性能

李刚;王金渠;杨建华;初乃波;鲁金明

大连理工大学精细化工国家重点实验室吸附与无机膜研究所,大连,116012

出版日期:2009-10-15 发布日期:2021-01-15

Gas Permeation Properties and Synthesis of SAPO-34 Zeolite Membranes by Secondary Growth Method

LI Gang;WANG Jin-qu;YANG Jian-hua;CHU Nai-bo;LU Jin-ming

Online:2009-10-15 Published:2021-01-15

摘要/Abstract

摘要： 以四乙基氢氧化铵(TEAOH)为模板剂,采用二次生长法在α-Al_2O_3多孔陶瓷管上合成了SAPO-34沸石膜.利用X射线衍射(XRD)、扫描电镜(SEM)以及气体渗透对合成的膜进行了表征.XRD结果表明合成的膜具有典型的CHA型沸石特征峰,无其它杂相存在.SEM显示膜厚大约为5 μm,膜表面晶粒交织共生完好,且连续、致密,没有发现明显的针孔和裂纹.室温下, 当膜两侧压降为0.1 MPa时,CO_2/CH_4的理想选择性和混合气体分离选择性分别为7和40.

关键词: SAPO-34;沸石膜;二次生长;CO_2/CH_4分离

Abstract: SAPO-34 zeolite membranes were synthesized on porous α-Al_2O_3 tubular support by secondary growth method using TEAOH as template. The membranes were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and gas permeation tests. XRD patterns showed that the as-synthesized membranes had typical CHA-type zeolite XRD patterns, and no other phase presented. SEM analysis revealed that a thin and compact SAPO-34 layer was formed on α-Al_2O_3 tubular support, the crystals showed well intergrowth, and no pinholes and cracks were observed. At room temperature, with a pressure drop of 0.1 MPa, the ideal and separation selectivity of a SAPO-34 zeolite membrane were 7 and 40, respectively.

Key words: SAPO-34%zeolite membranes%secondary growth%CO_2/CH_4 separation

中图分类号:

O614.3

李刚;王金渠;杨建华;初乃波;鲁金明. 二次生长法合成SAPO-34沸石膜及其气体渗透性能[J]. 硅酸盐通报, 2009, 28(5): 887-892.

LI Gang;WANG Jin-qu;YANG Jian-hua;CHU Nai-bo;LU Jin-ming. Gas Permeation Properties and Synthesis of SAPO-34 Zeolite Membranes by Secondary Growth Method[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2009, 28(5): 887-892.

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