摘要
以四乙基氢氧化铵(TEAOH)为模板剂,采用二次生长法在α-Al2O3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5μm,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0.1MPa时,CO2/CH4的理想选择性和混合气体分离选择性分别为7和40。
SAPO-34 zeolite membranes were synthesized on porous α-Al2O3 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-Al2O3 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.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2009年第5期887-892,共6页
Bulletin of the Chinese Ceramic Society
