Variable kinetic parameters for catalytic reactions of isobutane over zeolites

Author(s)
Alanazi, Abdullah Khalaf
Brown, Trevor
Smith, Erica
Miron, David
Publication Date
2017
Abstract
Novel methodologies including wavelet shrinkage denoising techniques and time-varying linear flexible least squares (TVFLS) are used to determine kinetic rate parameters from the raw data of Le Minh (2005) and Le Minh and Brown (2006) obtained from low-pressure, steady-state, temperature programmed catalysis. These methodologies are applied to the raw mass spectral abundances from temperature-programmed isobutane conversion into isobutene and propene over the four pure zeolites: ZSM-5 (30), ZSM-5 (80), mordenite and ferrierite, and over modified ZSM-5 (30) with iron and antimony. Variations in rates are a consequence of isobutane cracking and dehydrogenation, isobutene and propene dimerization and desorption reaction pathways. Multiple ranges of accurate activation energies and pre-exponential factors validate the effectiveness of denoising the data by using the weighted averages of Daubechies Least Asymmetric wavelet families and then applying TVFLS.
Link
Title
Variable kinetic parameters for catalytic reactions of isobutane over zeolites
Type of document
Thesis Doctoral
Entity Type
Publication

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