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Title: Catalytic activity of vanadium oxides in the oxidation of benzene

Abstract

The catalytic oxidation of benzene over V{sub 2}O{sub 5}, V{sub 6}O{sub 13}, V{sub 2}O{sub 4}, V{sub 7}O{sub 13}, V{sub 6}O{sub 11}, V{sub 5}O{sub 9}, V{sub 4}O{sub 7}, V{sub 3}O{sub 5}, and V{sub 2}O{sub 3} was investigated at 300-400{degree}C. Stoichiometric V{sub 2}O{sub 5} was catalytically inactive. However, after reduction with C{sub 6}H{sub 6} vapor it became active and selective for formation of maleic anhydride. The catalyst was then an intimate mixture of V{sub 2}O{sub 4}, V{sub 6}O{sub 13} with smaller amounts of V{sub 6}O{sub 13} and V{sub 4}O{sub 9}. All the oxides lower than V{sub 2}O{sub 5} were active without any pretreatment. The curve showing the initial catalytic activity versus averaged oxidation number of vanadium in particular oxides exhibited two distinct stronger and weaker maxima corresponding to V{sub 2}O{sub 4} and V{sub 4}O{sub 7} phases, respectively. In the course of the catalytic reaction the oxides lower than V{sub 2}O{sub 4} were slowly oxidized and partially transformed into other phases. The most stable under the conditions of the catalytic reaction wee V{sub 2}O{sub 4} and V{sub 6}O{sub 13} in which vanadium practically did not change its oxidation state. The selectivity with respect to maleic anhydride in the case of the pure oxidesmore » was generally low and total degradation of benzene to carbon oxides and water predominated. However, the selectivity could be markedly improved by introducing MoO{sub 3} into solid solution in V{sub 6}O{sub 13} or V{sub 2}O{sub 4}.« less

Authors:
; ;  [1]
  1. Jagiellonian Univ., Karasia (Poland)
Publication Date:
OSTI Identifier:
6571666
Resource Type:
Journal Article
Journal Name:
Journal of Catalysis; (USA)
Additional Journal Information:
Journal Volume: 112:2; Journal ID: ISSN 0021-9517
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BENZENE; OXIDATION; VANADIUM OXIDES; CATALYTIC EFFECTS; ADDITIVES; ANHYDRIDES; CARBON OXIDES; CHEMICAL REACTION YIELD; MALEIC ACID; MEDIUM TEMPERATURE; MOLYBDENUM OXIDES; PHASE TRANSFORMATIONS; REDUCTION; WATER; AROMATICS; CARBON COMPOUNDS; CARBOXYLIC ACIDS; CHALCOGENIDES; CHEMICAL REACTIONS; DICARBOXYLIC ACIDS; HYDROCARBONS; HYDROGEN COMPOUNDS; MOLYBDENUM COMPOUNDS; ORGANIC ACIDS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; REFRACTORY METAL COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; VANADIUM COMPOUNDS; YIELDS; 020400* - Petroleum- Processing; 400201 - Chemical & Physicochemical Properties

Citation Formats

Bielanski, A, Piwowarczyk, J, and Pozniczek, J. Catalytic activity of vanadium oxides in the oxidation of benzene. United States: N. p., 1988. Web. doi:10.1016/0021-9517(88)90262-X.
Bielanski, A, Piwowarczyk, J, & Pozniczek, J. Catalytic activity of vanadium oxides in the oxidation of benzene. United States. https://doi.org/10.1016/0021-9517(88)90262-X
Bielanski, A, Piwowarczyk, J, and Pozniczek, J. Sat . "Catalytic activity of vanadium oxides in the oxidation of benzene". United States. https://doi.org/10.1016/0021-9517(88)90262-X.
@article{osti_6571666,
title = {Catalytic activity of vanadium oxides in the oxidation of benzene},
author = {Bielanski, A and Piwowarczyk, J and Pozniczek, J},
abstractNote = {The catalytic oxidation of benzene over V{sub 2}O{sub 5}, V{sub 6}O{sub 13}, V{sub 2}O{sub 4}, V{sub 7}O{sub 13}, V{sub 6}O{sub 11}, V{sub 5}O{sub 9}, V{sub 4}O{sub 7}, V{sub 3}O{sub 5}, and V{sub 2}O{sub 3} was investigated at 300-400{degree}C. Stoichiometric V{sub 2}O{sub 5} was catalytically inactive. However, after reduction with C{sub 6}H{sub 6} vapor it became active and selective for formation of maleic anhydride. The catalyst was then an intimate mixture of V{sub 2}O{sub 4}, V{sub 6}O{sub 13} with smaller amounts of V{sub 6}O{sub 13} and V{sub 4}O{sub 9}. All the oxides lower than V{sub 2}O{sub 5} were active without any pretreatment. The curve showing the initial catalytic activity versus averaged oxidation number of vanadium in particular oxides exhibited two distinct stronger and weaker maxima corresponding to V{sub 2}O{sub 4} and V{sub 4}O{sub 7} phases, respectively. In the course of the catalytic reaction the oxides lower than V{sub 2}O{sub 4} were slowly oxidized and partially transformed into other phases. The most stable under the conditions of the catalytic reaction wee V{sub 2}O{sub 4} and V{sub 6}O{sub 13} in which vanadium practically did not change its oxidation state. The selectivity with respect to maleic anhydride in the case of the pure oxides was generally low and total degradation of benzene to carbon oxides and water predominated. However, the selectivity could be markedly improved by introducing MoO{sub 3} into solid solution in V{sub 6}O{sub 13} or V{sub 2}O{sub 4}.},
doi = {10.1016/0021-9517(88)90262-X},
url = {https://www.osti.gov/biblio/6571666}, journal = {Journal of Catalysis; (USA)},
issn = {0021-9517},
number = ,
volume = 112:2,
place = {United States},
year = {1988},
month = {10}
}