摘要
Y型分子筛在催化裂化领域有着极其重要的应用,对其的介孔改性研究也引起了国内外研究者的广泛关注。本文综述了近年来Y型分子筛介孔改性的方法,指出了各种方法的优缺点,重点评述了高温水蒸气脱铝过程以及使用孔导向剂脱硅过程中介孔的形成机理,分析了通过脱铝和脱硅向Y型分子筛引入介孔时对其酸性和水热稳定性产生的影响。对介孔改性后的Y型分子筛的应用进行了总结,认为介孔改性的Y型分子筛将广泛应用于煤、生物质及其他含碳原料催化转化等领域。
Y zeolites are widely used in catalytic cracking,and the modification of them have attracted extensive attentions from all over the world. In this review,different methods of mesopore modification of Y zeolites in recent years are summarized,and their advantages and disadvantages are pointed out. The mesopore formation mechanisms during dealumination（steaming）and desilication（with the presence of pore-directing agents）are discussed,and the influences of dealumination and desilication on the acidity and hydrothermal stability of Y zeolites are analysed. The applications of mesopore-modified Y zeolites are also presented. At last,it concludes that the mesopore-modified Y zeolites are promising catalysts which will be used in catalytic conversion of coal,biomass and other carbonaceous materials.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2018年第2期569-575,共7页
Chemical Industry and Engineering Progress
基金
国家自然科学基金项目(21706173
21376160)
关键词
催化
分子筛
介孔改性
扩散
catalysis
zeolites
mesopore-modification
diffusion
