摘要
通过极浓体系合成法,采用固体硅源和有机复合表面活性剂,原位合成具有特殊形貌的纳米级和微米级晶粒共生的ZSM-5分子筛。SEM结果表明,晶粒尺寸最小200nm、最大2μm,兼顾小品粒活性高和大晶粒稳定性高的特性;BET结果表明,产品具有从0.4～6.5nm梯级分布的孔径结构。并对其晶化机理进行了探讨。微反评价结果表明,合成的ZSM-5分子筛具有良好的异构化性能。
ZSM-5 zeolite with special morphology and having coexistence of nano-micro crystal particles was synthesized in an extra concentrated system using solid silicon sources and organic composite surfactant. The SEM and BET analysis results showed that the minimum and maximum crystal size of the synthesized ZSM-5 zeolite was 200 nm and 2 μm, respectively; the pore structure of this zeolite exhibited gradient pore size distributions in the range of 0.4-6.5 nm. Said ZSM-5 zeolite possessed both high catalytic activity and high stability from the advantages of small crystal size zeolite and large crystal size zeolite. The test results of micro-activity evaluation showed that catalyst containing said ZSM-5 zeolite exhibited excellent isomerization performance. The crystallization mechanism of this novel ZSM-5 zeolite was discussed as well.
出处
《石油炼制与化工》
CAS
CSCD
北大核心
2010年第10期40-46,共7页
Petroleum Processing and Petrochemicals
基金
国家自然科学基金(20473039)
关键词
极浓体系
形貌
ZSM-5
梯级分布
extra concentrated system
morphology
ZSM-5
gradient distribution
