Pure-phase zeolite beta synthesized from natural aluminosilicate minerals and its catalytic application for esterification
Pure-phase zeolite beta synthesized from natural aluminosilicate minerals and its catalytic application for esterification
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天然铝硅酸盐矿物合成纯相β沸石及其酯化催化应用
DOI：
10.1016/j.clay.2016.02.024
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发表时间：
2016-06-01
影响因子：
5.6
通讯作者：
Bao, Xiaojun
中科院分区：
文献类型：
--
作者：
Yue, Yuanyuan;Liu, Haiyan;Bao, Xiaojun
利用天然硅酸铝矿物作为合成沸石的低成本原料是当前的研究热点。然而，这些矿物中存在的杂质极大地影响了最终产品的纯度。本文介绍了一种廉价、绿色的合成纯相β沸石的方法，该方法是通过改进的纳米级解聚-重组法从天然铝硅酸盐矿物中合成β沸石。对合成的β沸石的物理化学性质和催化性能进行了系统的表征和评价。结果表明，合成的β沸石具有更多的中等Bronsted酸中心，对乙酸与乙醇的酯化反应具有更高的催化活性。这种方法展示了低成本和环境友好的β沸石合成的巨大前景，避免了使用含铝和含硅的无机化学品，消除了杂质的干扰，并减少了有机模板剂的使用。(C)2016爱思唯尔B. V.保留所有权利。
The use of natural aluminosilicate minerals as the low-cost starting materials for zeolite synthesis is a field of current interest. However, impurities existing in these minerals greatly affect the purity of final products. Herein, we describe a cheap and green route for synthesizing pure-phase zeolite beta from natural aluminosilicate minerals via a modified nanoscale depolymerization-reorganization approach. The physicochemical and catalytic properties of the synthesized zeolite beta were systematically characterized and assessed, respectively. The results indicate that the resulting zeolite beta possesses more moderate Bronsted acid sites compared with the reference one, and thus exhibits higher catalytic activity in the esterification of acetic acid with ethanol. This methodology demonstrates great perspective for the low-cost and environmentally-benign synthesis of zeolite beta that avoids the use of aluminum- and silicon-containing inorganic chemicals, eliminates the interference of impurities, and reduces the usage of the organic template. (C) 2016 Elsevier B.V. All rights reserved.