摘要
采用包埋法合成ZSM-5/SAPO-5核壳结构复合分子筛,研究了凝胶组成对该材料性能的影响,并利用X射线衍射和扫描电镜等手段对其进行了表征。结果表明,合成的分子筛是以ZSM-5为核,SAPO-5为壳的双结构复合分子筛。通过向凝胶中加入晶种或者调节溶剂性质可以明显改变复合材料的结晶度和颗粒形貌。引入晶种合成材料的颗粒形貌以椭圆型为主,分子筛的结晶度增加;以醇和水混合物为溶剂合成分子筛的颗粒仍以球形为主,分子筛的结晶速率降低,结晶度的最高值降低。
ZSM-5/SAPO-5 composite molecular sieves of core/shell structure were synthesized by embedding method and characterized by XRD and SEM;the effect of gel composition on their structure and morphology was investigated.The composite molecular sieves synthesized exhibit a binary structure with ZSM-5 as core and SAPO-5 as shell.The crystallinity and particle morphology of the composite molecular sieves are influenced by seed crystal and solvent used during synthesis.Through adding seed crystal,the crystallinity of the composite molecular sieves increases and the particles are mainly in elliptic morphology;by using a mixture of water and alcohols as solvent during synthesis,the particle morphology is mainly of sphericity,while the crystallization rate as well as the maximum crystallinity of the composite molecular sieves decreases.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2011年第10期787-791,共5页
Journal of Fuel Chemistry and Technology
基金
山东省自然科学基金(ZR2009BQ018)
作者简介
联系作者：李春义，博士，教授，E—mail：chyli@upc．edu．cn。
