The catalytic oxidation of 1-butene over bismuth molybdate V. The kinetics of the oxidation: B. Experiments with continuous flow and recirculation; reduction and reoxidation of Bi$z.sbnd;Mo

Kinetics of Carbon Tetrachloride biodegradation are evaluated in a continuous-flow fixed-biofilm reactor with controlled initial redox potential. The column was seeded with a mixed culture of indigenous microorganisms Pseudomonas cepacia and Providencia stuartii. The fixed biofilm reactor exhibited 98%–99.9% biodegradation of CT introduced into the reactor at an initial concentration of about 200 μg/l for retention times of 1 to 4 days respectively. Four models were employed to evaluate the kinetics of CT biodegradation. These included: Eckenfelder (1989), Arvin (1991), Bouwer and McCarty (1985) and a biphasic model. Comparison of calculated results with observed results between these models agreed very closely to each other (0.968 < R2 < 0.999). Predicted performance was best described by the model of Bouwer and McCarty (1985). However, the biphasic and Eckenfelder models provided excellent correlations and were much simpler to apply. The biphasic model yielded very good correlations of the data for all detention times evaluated; whereas, the Eckenfelder model effected comparable results only at the longer retention times studied.

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Mechanism and kinetics of catalytic oxidation of CO to CO2 over Ptn+and MPtn-1+, (M=Sn, Rh &Ru; n=3, 4) clusters

Molecular Catalysis ◽

10.1016/j.mcat.2021.111638 ◽

2021 ◽

Vol 509 ◽

pp. 111638

Author(s):

Satyajit Dey Baruah ◽

Subrata Paul ◽

Nand Kishor Gour ◽

Nishant Biswakarma ◽

Ramesh Chandra Deka

Keyword(s):

Catalytic Oxidation ◽

Oxidation Of Co ◽

Catalytic Oxidation Of Co ◽

Mechanism And Kinetics ◽

Kinetics Of

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Gas phase interaction with catalytic oxidation reactions

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1972.0006 ◽

1972 ◽

Vol 326 (1565) ◽

pp. 215-227 ◽

Cited By ~ 7

Keyword(s):

Carbon Dioxide ◽

Maleic Anhydride ◽

Catalytic Oxidation ◽

Gas Phase ◽

Major Part ◽

Oxidation Reactions ◽

Mixed Gas ◽

Kinetics Of ◽

Oxidation Of Benzene ◽

Homogeneous Decomposition

Studies of the catalytic oxidation of benzene to maleic anhydride and carbon dioxide over vanadia/molybdena catalysts show that the major part of the reaction involves interacting gas and gas-solid processes. The results are consistent with a mechanism in which a benzeneoxygen adduct is formed catalytically, desorbs and then reacts to give maleic anhydride entirely in the gas phase. On the basis of this proposed mechanism, the kinetics of individual reactions have been investigated in some depth. The over-oxidation of maleic anhydride has been found to be not significant under the conditions of reaction. The kinetic relationships governing the homogeneous decomposition of the adduct and the oxidation of the adduct to maleic anhydride and to carbon dioxide have been established. The results show that essentially all of the anhydride originates from mixed gas-solid/gas reaction while substantial amounts of carbon dioxide are produced entirely catalytically.

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Kinetic modelling of NO heterogeneous radiation-catalytic oxidation on the TiO2 surface in humid air under the electron beam irradiation

Nukleonika ◽

10.1515/nuka-2017-0034 ◽

2017 ◽

Vol 62 (3) ◽

pp. 235-240 ◽

Cited By ~ 2

Author(s):

Henrietta Nichipor ◽

Yongxia Sun ◽

Andrzej G. Chmielewski

Keyword(s):

Electron Beam ◽

Catalytic Oxidation ◽

Removal Efficiency ◽

Electron Beam Irradiation ◽

Kinetic Modelling ◽

Water Concentration ◽

Beam Irradiation ◽

Humid Air ◽

Kinetics Of ◽

Influential Parameters

Abstract Theoretical study of NOx removal from humid air by a hybrid system (catalyst combined with electron beam) was carried out. The purpose of this work is to study the possibility to decrease energy consumption for NOx removal. The kinetics of radiation catalytic oxidation of NO on the catalyst TiO2 surface under electron beam irradiation was elaborated. Program Scilab 5.3.0 was used for numerical simulations. Influential parameters such as inlet NO concentration, dose, gas fl ow rate, water concentration and catalyst contents that can affect NOx removal efficiency were studied. The results of calculation show that the removal efficiency of NOx might be increased by 8-16% with the presence of a catalyst in the gas irradiated field.

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Automated Fluoride Ion Determination

Annals of Clinical Biochemistry International Journal of Laboratory Medicine ◽

10.1177/000456327701400174 ◽

1977 ◽

Vol 14 (1-6) ◽

pp. 269-274 ◽

Cited By ~ 8

Author(s):

David C. Cowell

Keyword(s):

Continuous Flow ◽

Ion Concentration ◽

Fluoride Ion ◽

Selective Electrode ◽

Automated Method ◽

Electrode Response ◽

Kinetics Of ◽

Fluoride Ion Selective Electrode ◽

Flow Techniques

An automated method is described, using standard continuous flow techniques, for the determination of urine fluoride ion concentration using a fluoride ion selective electrode. It is shown that the kinetics of the electrode response to changes in fluoride ion can be used for the accurate measurement of fluoride ion concentration in urine, and that equilibration of the electrode response is not a prerequisite for the measurement of fluoride ion. Recovery experiments are in the range 83 to 90%; in-batch precision is between 0·9 and 1·6% and carryover 2·5% or less.

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