期刊
AICHE JOURNAL
卷 54, 期 7, 页码 1850-1859出版社
JOHN WILEY & SONS INC
DOI: 10.1002/aic.11512
关键词
bimodal micro-mesoporous aluminosilicates; zeolite nanoclusters; pore structure tuning; heavy oil catalytic cracking
Through a two-step synthesis procedure, bimodal micro-mesoporous aluminosilicates, denoted as B-MASs, were synthesized by assembling preformed zeolite Y nanoclusters using a triblock polymer as template. By controlling the aging conditions of preformed zeolite nanoclusters the porosity of the B-MASs was suitably tuned. The characterization results showed that the pore walls of the mesoporous phase in the B-MASs consist of zeolite Y nanoclusters and the microporosity of the B-MASs is inherited from the incorporated nanoclusters. It was suggested that more incorporation of the well-developed zeolite nanoclusters accounts for the increasing microporosity of the B-MASs with the increasing aging temperature of the preformed zeolite nanoclusters. The incorporated nanoclusters have much shorter pore channels and mainly contribute weak Lewis acid sites to the B-MASs. The resulting bimodal micro-mesoporous materials B-MASs with mutually connected mesopores and shorter micropores showed superior catalytic properties when used for cracking heavy crude oil. (C) 2008 American Institute of Chemical Engineers.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据