Application of a Two-State Kinetic Model to The Heterogeneous Kinetics of Reaction between Cysteine and Hydrogen Peroxide in Amorphous Lyophiles

2008 ◽  
Vol 97 (9) ◽  
pp. 3907-3926 ◽  
Author(s):  
Dayong Luo ◽  
Bradley D. Anderson
Keyword(s):  
Hydrogen Peroxide ◽  
Kinetic Model ◽  
Heterogeneous Kinetics ◽  
Kinetics Of Reaction ◽  
Kinetics Of ◽  
State Kinetic

ChemInform Abstract: KINETICS OF REACTION OF ETHYL DIXANTHOGEN WITH HYDROGEN PEROXIDE IN ALCOHOL-AQUEOUS SOLUTIONS PART 1 AND 2

1974 ◽  
Vol 5 (24) ◽  
pp. no-no
Author(s):  
TERESA MLODNICKA ◽  
MARIA PALUCH ◽  
ANDRZEJ POMIANOWSKI ◽  
EWA KRAUSS ◽  
BARBARA SIWEK
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Solutions ◽  
Kinetics Of Reaction ◽  
Kinetics Of

scholarly journals Nonlinear Modelling of Kinetic Data Obtained from Photocatalytic Mineralisation of 2,4-Dichlorophenol on a Titanium Dioxide Membrane

2009 ◽  
Vol 2009 ◽  
pp. 1-10 ◽  
Author(s):  
Ignazio Renato Bellobono ◽  
Roberto Scotti ◽  
Massimiliano D'Arienzo ◽  
Franca Morazzoni ◽  
Riccardo Bianchi ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Peroxide ◽  
Titanium Dioxide ◽  
Kinetic Model ◽  
Unit Length ◽  
Oxygen Demand ◽  
Quantum Yields ◽  
Superoxide Radical Anion ◽  
Series Of Experiments ◽  
Kinetics Of

Photomineralisation of 2,4-dichlorophenol (DCP) in aqueous solutions (10.0–100.0 mg/L of C) was systematically studied at318±3 K, in an annular laboratory-scale reactor, by photocatalytic membranes immobilizing titanium dioxide, as a function of substrate concentration, and absorbed power per unit length of membrane. Kinetics of both substrate disappearance, to yield intermediates, and total organic carbon (TOC) disappearance, to yield carbon dioxide, were followed (first series of experiments). At a fixed value of irradiance (1.50 W⋅cm−1), other series of mineralization experiments were repeated (second series of experiments) by carrying out only analyses of chemical oxygen demand (COD), in order to compare modelling results of the two sets of experiments. In both sets of experiments, stoichiometric hydrogen peroxide was used as oxygen donor. For the first series of experiments, a kinetic model was employed, already validated in previous work, from which, by a set of differential equations, four final optimised parameters,k1andK1,k2andK2, were calculated. By these parameters, the whole kinetic profile could be fitted adequately. The influence of irradiance onk1andk2could be rationalised very well by this four-parameter kinetic model. Modelling of quantum yields, as a function of irradiance, could also be carried out satisfactorily. As has been found previously for other kinds of substrates, modelling of quantum yields for DCP mineralization is consistent with kinetics of hydroxyl radicals reacting between themselves, leading to hydrogen peroxide, other than with substrate or intermediates leading finally to carbon dioxide, paralleled by a second competition kinetics involving superoxide radical anion. For the second series of experiments, on the contrary, the Langmuir-Hinshelwood model was employed. Uncertainties of COD analyses, coupled with discrepancies of this model and with its inability to reproduce kinetics up to complete mineralization, are underlined.

Kinetics of Formation of Peroxyformic Acid

1996 ◽  
Vol 61 (10) ◽  
pp. 1457-1463 ◽  
Author(s):  
Vladimír Mošovský ◽  
Zuzana Cvengrošová ◽  
Alexander Kaszonyi ◽  
Milan Králik ◽  
Milan Hronec
Keyword(s):  
Hydrogen Peroxide ◽  
Kinetic Model ◽  
Formic Acid ◽  
Oxidation Kinetics ◽  
Oxidation Process ◽  
Aqueous Hydrogen Peroxide ◽  
Kinetics Of Formation ◽  
Peroxyformic Acid ◽  
Kinetics Of

Oxidation kinetics of formic acid with aqueous hydrogen peroxide (30-70%) has been studied at 45 °C with 0-0.1 M H2SO4 as a catalyst. A kinetic model has been suggested which satisfactorily describes the oxidation process of formic acid to peroxyformic acid.

Diffusion model for deposition of epitaxial GaAs layers prepared by the MOCVD method

1991 ◽  
Vol 56 (10) ◽  
pp. 2020-2029
Author(s):  
Jindřich Leitner ◽  
Petr Voňka ◽  
Josef Stejskal ◽  
Přemysl Klíma ◽  
Rudolf Hladina
Keyword(s):  
Experimental Data ◽  
Growth Rate ◽  
Kinetic Model ◽  
Gas Phase ◽  
Substrate Surface ◽  
Deposition Process ◽  
Hydrogen Atmosphere ◽  
Epitaxial Gaas ◽  
Kinetics Of ◽  
Good Agreement

The authors proposed and treated quantitatively a kinetic model for deposition of epitaxial GaAs layers prepared by reaction of trimethylgallium with arsine in hydrogen atmosphere. The transport of gallium to the surface of the substrate is considered as the controlling process. The influence of the rate of chemical reactions in the gas phase and on the substrate surface on the kinetics of the deposition process is neglected. The calculated dependence of the growth rate of the layers on the conditions of the deposition is in a good agreement with experimental data in the temperature range from 600 to 800°C.

scholarly journals Torrefaction Thermogravimetric Analysis and Kinetics of Sorghum Distilled Residue for Sustainable Fuel Production

2021 ◽  
Vol 13 (8) ◽  
pp. 4246
Author(s):  
Shih-Wei Yen ◽  
Wei-Hsin Chen ◽  
Jo-Shu Chang ◽  
Chun-Fong Eng ◽  
Salman Raza Naqvi ◽  
...  
Keyword(s):  
Kinetic Model ◽  
Pso Algorithm ◽  
Nitrogen Atmosphere ◽  
Computational Method ◽  
Weight Changes ◽  
Design And Optimization ◽  
Thermogravimetric Analyzer ◽  
Model Free ◽  
Different Temperatures ◽  
Kinetics Of

This study investigated the kinetics of isothermal torrefaction of sorghum distilled residue (SDR), the main byproduct of the sorghum liquor-making process. The samples chosen were torrefied isothermally at five different temperatures under a nitrogen atmosphere in a thermogravimetric analyzer. Afterward, two different kinetic methods, the traditional model-free approach, and a two-step parallel reaction (TPR) kinetic model, were used to obtain the torrefaction kinetics of SDR. With the acquired 92–97% fit quality, which is the degree of similarity between calculated and real torrefaction curves, the traditional method approached using the Arrhenius equation showed a poor ability on kinetics prediction, whereas the TPR kinetic model optimized by the particle swarm optimization (PSO) algorithm showed that all the fit qualities are as high as 99%. The results suggest that PSO can simulate the actual torrefaction kinetics more accurately than the traditional kinetics approach. Moreover, the PSO method can be further employed for simulating the weight changes of reaction intermediates throughout the process. This computational method could be used as a powerful tool for industrial design and optimization in the biochar manufacturing process.

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