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Investigation of the oxidation of o ‐Xylene over a Vanadia/Titania catalyst by means of the TAP reactor
Author(s) -
Creten Glenn,
Froment Gilbert F.,
Kopink FrankDieter
Publication year - 1997
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.5450750508
Subject(s) - catalysis , anatase , chemistry , kinetics , desorption , reaction mechanism , degradation (telecommunications) , o xylene , chemical engineering , photochemistry , photocatalysis , organic chemistry , adsorption , computer science , engineering , telecommunications , physics , quantum mechanics
The oxidation of o ‐xylene over a commercial V 2 O 5 /TiO 2 (anatase) catalyst was studied in the TAP (Temporal Analysis of Products) reactor system. The transient method with high time resolution has led to new insights into the reaction mechanism. The selective oxidation is shown to consist of a sequence of steps, involving intermediates which desorb as o ‐toluolaldehyde and phtalide. The key reaction step in the non‐selective oxidation is shown to be a decar‐bonylation of a surface species, leading to a surface benzoate. The kinetics of the elementary steps in the reaction were derived from a quantitative analysis of the transient responses on o ‐xylene pulses.