Impact of Zeolite Structure on Entropic-Enthalpic Contributions to Alkane Monomolecular Cracking: An IR Operando Study.
作者： Shashikant A. Kadam , Haoguang Li , Richard F. Wormsbecher , Arnaud Travert
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摘要: The monomolecular cracking rates of propane and n-butane over MFI, CHA, FER TON zeolites were determined simultaneously with the coverage active sites at reaction condition using IR operando spectroscopy. This allowed direct determination adsorption thermodynamics intrinsic rate parameters. results show that zeolite confinement mediates enthalpy-entropy trade-offs only adsorbed state, leaving true activation energy insensitive to or alkane structure while entropy was found increase confinement. Hence, relative alkanes within pores are mostly governed by entropy.
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