Clarification of acid site location in MSE-type zeolites by spectroscopic approaches combined with catalytic activity: comparison between UZM-35 and MCM-68
Clarification of acid site location in MSE-type zeolites by spectroscopic approaches combined with catalytic activity: comparison between UZM-35 and MCM-68
复制标题
通过光谱方法结合催化活性澄清 MSE 型沸石中的酸性位点位置：UZM-35 和 MCM-68 之间的比较
DOI：
10.1039/d2cp00215a
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发表时间：
2022
影响因子：
3.3
通讯作者：
Yokoi Toshiyuki
中科院分区：
文献类型：
--
作者：
Toyoda Hiroto;Osuga Ryota;Wang Yong;Park Sungsik;Yazawa Koji;Gies Hermann;Gilbert Christopher J.;Yilmaz Bilge;Kelkar C. P.;Yokoi Toshiyuki
以不同的有机结构导向剂（OSDAs） UZM-35和MCM-68合成了mse型沸石。基于27Al MQMAS NMR和原位IR技术，结合催化活性评价，研究了框架Al原子衍生的Brønsted酸位的位置和酸性性质。我们成功地发现在mse型框架中Brønsted酸位点的位置存在显著差异；MCM-68和UZM-35分别有61%和33%的酸性位点位于12环通道。酸位位置的差异产生了它们对烃类裂解反应的独特催化活性，表明精心选择的osda类型的合成是控制mse型框架中框架Al原子分布的可能性之一。
MSE-type zeolites synthesized by different organic structure-directing agents (OSDAs), UZM-35 and MCM-68, were prepared. The location of Brønsted acid sites derived from the framework Al atoms and acidic properties were investigated based on 27Al MQMAS NMR and in situ IR techniques combined with the evaluation of the catalytic activity. We have successfully found a significant difference in the location of Brønsted acid sites in the MSE-type framework; 61 and 33% of acid sites were located at the 12-ring channel for MCM-68 and UZM-35, respectively. The differences in the location of the acid sites yielded their unique catalytic activities for the hydrocarbon cracking reactions, indicating that a well-chosen type of OSDAs for the synthesis is one of the possibilities for controlling the distribution of the framework Al atoms in the MSE-type framework.