Ultrafast post-synthesis treatment to prepare ZSM-5@Silicalite-1 as a core-shell structured zeolite catalyst
Ultrafast post-synthesis treatment to prepare ZSM-5@Silicalite-1 as a core-shell structured zeolite catalyst
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DOI：
10.1016/j.micromeso.2018.10.036
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发表时间：
2019-03
影响因子：
5.2
通讯作者：
Ce Peng;Zhendong Liu;Y. Yonezawa;Yutaka Yanaba;N. Katada;Ikuma Murayama;Sakura Segoshi;T. Okubo;T. Wakihara
中科院分区：
文献类型：
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作者：
Ce Peng;Zhendong Liu;Y. Yonezawa;Yutaka Yanaba;N. Katada;Ikuma Murayama;Sakura Segoshi;T. Okubo;T. Wakihara
合成后处理是改性沸石以获得所需性能的有效方法。在这里，我们提出了一种超快后合成处理来制备核壳结构沸石，该沸石由 ZSM-5 核和 Silalite-1 壳组成。我们的方法史无前例地在几分钟内形成了纯二氧化硅壳，其目的是去除与铝硅酸盐核外表面的骨架Al相关的布朗斯台德酸位点。采用 XRD、TG/DTA、SEM、TEM、ICP 和 XPS 等补充技术来验证 Silalite-1 壳成功覆盖到 ZSM-5 核上。通过调节处理时间、温度和反应物组成，可以容易地调节壳的厚度。此外，这种超快过程能够建立连续流动反应系统，从而可以大规模生产核壳结构沸石催化剂。
Post-synthesis treatment is an effective way to modify zeolites to acquire desirable properties. Here, we present an ultrafast post-synthesis treatment to prepare core-shell structured zeolite, which is composed of a ZSM-5 core and a silicalite-1 shell. The pure silica shell, which is aimed to remove the Brønsted acid sites associated with the framework Al on the external surface of aluminosilicate core, was formed unprecedentedly within several minutes by our method. Complementary techniques, such as XRD, TG/DTA, SEM, TEM, ICP, and XPS, were employed to verify the successful coverage of the silicalite-1 shell onto the ZSM-5 core. By adjusting the treating period, temperature, and reactant compositions, the thickness of the shell can be easily tuned. Further, this ultrafast process enabled the establishment of a continuous flow reaction system, which could allow the mass production of core-shell structured zeolite catalysts.