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Author: search.filters.author.Limtrakul, JumrasSubject: search.filters.subject.Zeolite catalysis

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    The catalytic conversion of acetonitrile to acrylonitrile in zeolitic systems: Rationalization of experimental observations using theoretical simulations
    (2007-12-15)
    Gleeson, Duangkamol
    ;
    Limtrakul, Jumras
    Quantum mechanical calculations have been performed on faujasite and silicalite models to investigate reported experimental differences in yields of two key catalytic products (propionitrile and acrylonitrile) formed from the reaction of acetonitrile with either methanol or formaldehyde, respectively. The calculations were performed using 12T and 10T cluster representations of faujasite and silicalite, respectively, and the results are in good overall agreement with experimental observations. Both reactions are predicted to proceed in a concerted manner, with the transfer of a proton to the basic zeolite oxygen atom in conjunction with the methyl group migration to form a reaction intermediate. The stationary points found on the reaction surface in both zeolites have been systematically assessed using principal components analysis to give us an insight into the correlated nature of the structural/electronic changes that occur on the reaction surfaces. © 2007 Elsevier B.V. All rights reserved.