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Kinetics of the catalytic oxidation of benzene
Author(s) -
Hayashi R.,
Hudgins R. R.,
Graydon W. F.
Publication year - 1963
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450410507
Subject(s) - benzene , naphthalene , chemistry , catalysis , toluene , maleic anhydride , kinetics , vanadium , photochemistry , catalytic oxidation , benzoquinone , inorganic chemistry , organic chemistry , physics , quantum mechanics , copolymer , polymer
The kinetics of the vapor‐phase oxidation of benzene over a sulphate‐promoted vanadium oxide catalyst were studied in a differential flow‐reactor. Rates of oxidation of benzene were measured at temperatures in the range 324° to 400°C., for benzene concentrations from 1 × 10 −3 to 6 × 10 −3 moles/l., by analysing the products: p‐benzoquinone and maleic anhydride. Reaction‐rate data were summarized by the following equation based upon a mechanism suggested by Hinshelwood:\documentclass{article}\pagestyle{empty}\begin{document}$$ r = \frac{{k_a k_r C_h C_o }}{{k_a C_o + nk_r C_h }} $$\end{document}Catalyst deactivation was observed during the oxidation of benzene. Benzene, naphthalene, and toluene oxidations over a common vanadium oxide catalyst were compared. Deactivation was observed with benzene and toluene, but not with naphthalene. The rate equation provides a useful empirical description of oxidation rates of individual compounds. However, the deactivation behavior of the systems and the rates observed indicate that the mechanism used in its derivation is not pertinent.