中国石油大学学报（自然科学版）2016，Vol.40Issue(2)：155-162,8.DOI:10.3969/j.issn.1673-5005.2016.02.020
一纳米棒插接多级孔ZSM-11分子筛形貌影响因素研究
Factors affecting the intergrowth morphology of hierarchical ZSM-11 microspheres
摘要
Abstract
The hierarchical ZSM-11 microspheres with intergrowth morphology have been synthesized by using tetrabutylam-monium bromide ( TBABr) as the single template via a two-stage temperature-varying crystallization route. The effects of sili-ca source, aluminum source, SiO2/Al2 O3 ratio, alkali cations and the organic templates on the formation of intergrowth mor-phology were investigated. It is found that the silica sources, aluminum sources and the alkali cations mainly influence the rate of nucleation and the crystal growth via the depolymerization-polymerization rate, which affects the crystallization kinetics and the grain size of the final product. And there is no significant influence on the intergrowth morphology. Compared with silica source ( silica gel microsphere) , using liquid silica source ( water glass and silica sol) , can obtain smaller sized zeolite microspheres. It is favorable to get smaller crystals in a short period when using aluminiumisopropoxide as aluminum source compared with inorganic aluminum source. Besides, it is found the existence of K+could suppress the fast formation of small crystals relative to the Li+ and Na+. The formation of the intergrowth morphology of the crystal product is affected directly by the template types, in which the existence of tetrabutylammonium cation is a key factor. It is also found that the intergrowth morphology becomes less evident with the decline of the Al amount in the system. And the presence of Al is one of the neces-sary factors for this intergrowth morphology.关键词
插接形貌/ZSM-11分子筛/多级孔/影响因素Key words
intergrowth morphology/ZSM-11/hierarchical/factors分类
能源科技引用本文复制引用
于庆君,李春义,山红红,唐晓龙,易红宏..一纳米棒插接多级孔ZSM-11分子筛形貌影响因素研究[J].中国石油大学学报（自然科学版）,2016,40(2):155-162,8.基金项目
国家自然科学基金项目(21507004) （21507004）
中央高校基本科研业务费专项( FRF-TP-15-046A1) （ FRF-TP-15-046A1）
中国博士后基金项目(2015M580996) （2015M580996）
