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Experimental study on the separability of reaction‐deactivation kinetics: Thermal desorption of alcohols from fresh and Na‐poisoned γ–Al 2 O 3
Author(s) -
Forzatti Pio,
Borghesi Massimo,
Pasquon Italo,
Tronconi Enrico
Publication year - 1986
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690320110
Subject(s) - desorption , kinetics , chemistry , catalysis , thermal desorption spectroscopy , methanol , chemical kinetics , selectivity , kinetic energy , thermodynamics , thermal desorption , reaction rate , analytical chemistry (journal) , adsorption , chromatography , organic chemistry , physics , quantum mechanics
Temperature programmed desorption (TPD) of methanol and ethanol from fresh and Na‐poisoned γ–Al 2 O 3 has been employed to investigate experimentally the separability of reaction‐deactivation kinetics. The analysis of the TPD spectra has provided both an energetic characterization of the nonhomogeneous catalytic surface and the kinetic parameters of the desorption reaction, and has allowed quantitative discussion of the separability of the expression for the rate of desorption. The results obtained have been related to the chemical causes of nonseparability of reaction‐deactivation kinetics; they also demonstrate the influence of catalyst decay on selectivity. For the systems considered, it appears that the assumption of separable deactivation kinetics is generally not a satisfactory approximation.