A Kinetic Study of the Vapour-phase Oxidation of Toluene Over a Vanadium Oxide Catalyst PDF Download
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Author: John Downie
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Languages : en
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Author: John Downie
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Category :
Languages : en
Pages :
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Author: Raymond Douglas Steele
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Category :
Languages : en
Pages : 154
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Category :
Languages : en
Pages : 458
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Author: Ford Raphael Lowdermilk
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Category : Alcohols
Languages : en
Pages : 20
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Author: Chunli Zhao
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ISBN: 9780549279174
Category :
Languages : en
Pages : 213
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The selective oxidation of propylene to acrolein was found to exhibit the following reaction kinetics r = k[C3H6]1 [O2]1/2[*]02, in which [*]0 represents the total number of catalytic surface VO4 active sites/g of catalyst and k is an apparent rate constant that is a function of krds and Kads. The second order dependence on [*]0 suggests that two surface VO4 sites are involved in the rds of propylene oxidation. Although the reaction rate increases as [*]02 with surface vanadia coverage, the most pronounced effect on the reaction kinetics was observed by changing the specific oxide support (ZrO2 & sim; TiO2> Nb2O 5> Al2O3> SiO2). This almost 10 2 variation in Turnover Frequency (TOF) is related to the electron density on the bridging V-O-Support bond that is controlled by the electronegativity of the support cation. Consequently, the lower the support cation electronegativity, the greater the residual electron density on the bridging V-O-support bond for accelerating the redox kinetics.
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Category : Chemical engineering
Languages : en
Pages : 626
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Author: Michelle Katherine Lynch
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Category : Acetic acid
Languages : en
Pages :
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Author: Leroy Frank Marek
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Category : Science
Languages : en
Pages : 512
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Category :
Languages : en
Pages : 886
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Author: Edward F. Smith
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Category : Oxidation
Languages : en
Pages : 322
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