From natural aluminosilicate minerals to hierarchical ZSM-5 zeolites: A nanoscale depolymerization-reorganization approach
From natural aluminosilicate minerals to hierarchical ZSM-5 zeolites: A nanoscale depolymerization-reorganization approach
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DOI：
10.1016/j.jcat.2014.08.009
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发表时间：
2014-11-01
影响因子：
7.3
通讯作者：
Bao, Xiaojun
中科院分区：
文献类型：
--
作者：
Yue, Yuanyuan;Liu, Haiyan;Bao, Xiaojun
在这篇文章中，我们描述了一种新的策略，通过纳米级解聚-重组天然铝硅酸盐矿物合成分级ZSM-5沸石。该策略包括两个重要步骤：第一步是通过新型亚熔盐体系将一种富铝铝硅酸盐矿物和一种富硅铝硅酸盐矿物通过常规热处理自上而下解聚成纳米级结构单元，第二步是合成体系中纳米级结构单元自下而上重排和重组成分级ZSM-5沸石。作为流化催化裂化催化剂添加剂，所得到的具有分级微孔-介孔结构的ZSM-5沸石在初步的炼油试验中表现出高的活性和对有价值产品的选择性。该方法的显著特点是既不使用无机铝盐和硅盐作为前驱体，也不使用二次介孔模板剂和后处理来制备介孔，是一条合成多级沸石的绿色途径。(C)2014爱思唯尔公司All rights reserved.
In this article, we describe a novel strategy for synthesizing hierarchical ZSM-5 zeolites via the nanoscale depolymerization-reorganization of natural aluminosilicate minerals. This strategy involves two important steps: the first is the top-down depolymerization of one aluminum-rich aluminosilicate mineral via a novel submolten salt system and one silicon-rich aluminosilicate mineral via conventional thermal treatment into nanoscale building blocks, and the second is the bottom-up rearrangement and reorganization of nanoscale building blocks in the synthesis system into hierarchical ZSM-5 zeolites. When used as a fluid catalytic cracking catalyst additive, the resulting ZSM-5 zeolite with hierarchical micro-mesoporous structure exhibited high activity and selectivity for valuable products in preliminary oil refining tests. The salient features of the strategy lie in that it neither involves any inorganic aluminum and silicon salts as precursors nor uses any secondary mesoscale template and post-treatment to create mesopores, thus demonstrating itself to be a green route to synthesizing hierarchical zeolites. (C) 2014 Elsevier Inc. All rights reserved.