1-1-4　ゲル骨格補強シリカとZSM-5の同時発生による階層構造触媒の低温での調製と反応性の解析

抄録

In this study, a zeolite-containing hierarchical catalyst having micropores on the inside and mesopores on the outside was prepared in one step under low temperature conditions using the gel skeletal reinforcement method at the preparation of zeolite simultaneously. The influence of the preparation temperature and aging time on the development of zeolite and mesopores in the catalyst was examined by characterization of catalysts and the reactivity for catalytic cracking of n-dodecane. At 100°C and higher than 100°C and 48 h aging time and longer than 48h, zeolite crystals and silica with large mesopores developed simultaneously. A catalysts prepared at 100°C of crystallization temperature and 48h of aging time (CR100 (48h)) showed the highest conversion in n-dodecane cracking. Although the crystallinity of ZSM-5 was higher in CR100(72h), the conversion of CR100(48h) was higher than that of CR100(72h) probably because of the presence of large mesopores.