Clarification of acid site location in MSE-type zeolites by spectroscopic approaches combined with catalytic activity: comparison between UZM-35 and MCM-68
Hiroto Toyoda, Ryota Osuga, Yong Wang, Sung-Sik Park, Koji Yazawa, Hermann Gies, Christopher J. Gilbert, Bilge Yilmaz, C. P. Kelkar, Toshiyuki Yokoi
Abstract
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.
Topics & Concepts
CatalysisChemistryBrønsted–Lowry acid–base theoryZeoliteFluid catalytic crackingRing (chemistry)HydrocarbonType (biology)Organic chemistryGeologyPaleontologyZeolite Catalysis and SynthesisMetal-Organic Frameworks: Synthesis and ApplicationsAdvanced NMR Techniques and Applications