TY - JOUR
T1 - Clarification of acid site location in MSE-type zeolites by spectroscopic approaches combined with catalytic activity
T2 - Comparison between UZM-35 and MCM-68
AU - Toyoda, Hiroto
AU - Osuga, Ryota
AU - Wang, Yong
AU - Park, Sungsik
AU - Yazawa, Koji
AU - Gies, Hermann
AU - Gilbert, Christopher J.
AU - Yilmaz, Bilge
AU - Kelkar, C. P.
AU - Yokoi, Toshiyuki
N1 - Funding Information:
This work was financially supported by a Grant-in-Aid for Scientific Research (S) (KAKENHI, 21H05011) and a Grant-in-Aid for Scientific Research (B) (KAKENHI 21H01714) from the Japan Society for the Promotion of Science (JSPS).
Publisher Copyright:
© the Owner Societies.
PY - 2022/2
Y1 - 2022/2
N2 - 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.
AB - 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.
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U2 - 10.1039/d2cp00215a
DO - 10.1039/d2cp00215a
M3 - Article
C2 - 35112119
AN - SCOPUS:85124803239
SN - 1463-9076
VL - 24
SP - 4358
EP - 4365
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
IS - 7
ER -