scholarly journals The kinetics of the hydrogen chloride oxidation

2013 ◽  
Vol 78 (12) ◽  
pp. 2115-2130 ◽  
Author(s):  
Martinez Gonzalez ◽  
Tanja Vidakovic-Koch ◽  
Rafael Kuwertz ◽  
Ulrich Kunz ◽  
Thomas Turek ◽  
...  
Keyword(s):  
Kinetic Parameters ◽  
Gas Phase ◽  
Hydrogen Chloride ◽  
Reaction Order ◽  
Membrane Electrode ◽  
Polarization Data ◽  
Rate Determining Step ◽  
Electrode Assemblies ◽  
Apparent Kinetic Parameters ◽  
Kinetics Of

Hydrogen chloride (HCl) oxidation has been investigated on technical membrane electrode assemblies in a cyclone flow cell. Influence of Nafion loading, temperature and hydrogen chloride mole fraction in the gas phase has been studied. The apparent kinetic parameters like reaction order with respect to HCl, Tafel slope and activation energy have been determined from polarization data. The apparent kinetic parameters suggest that the recombination of adsorbed Cl intermediate is the rate determining step.

Gas-phase elimination kinetics of selected aliphatic α,β-unsaturated aldehydes catalyzed by hydrogen chloride

2015 ◽  
Vol 28 (4) ◽  
pp. 261-265 ◽  
Author(s):  
Libia L. Julio ◽  
José R. Mora ◽  
Alexis Maldonado ◽  
Gabriel Chuchani
Keyword(s):  
Gas Phase ◽  
Hydrogen Chloride ◽  
Elimination Kinetics ◽  
Unsaturated Aldehydes ◽  
Kinetics Of ◽  
Phase Elimination

The kinetics of the pyrolysis of Cyclohexyl chloride.

1958 ◽  
Vol 11 (3) ◽  
pp. 314 ◽  
Author(s):  
ES Swinbourne
Keyword(s):  
Gas Phase ◽  
Hydrogen Chloride ◽  
Rate Coefficient ◽  
Initial Pressure ◽  
Order Reaction ◽  
Rate Coefficients ◽  
Homogeneous Reaction ◽  
First Order ◽  
Induction Periods ◽  
Kinetics Of

cycloHexy1 chloride has been shown to decompose in the gas phase at 318-385 �C almost exclusively to cyclohexene and hydrogen chloride. With clean glass-walled reactors the reaction was largely heterogeneous, but after the walls were coated with a carbonaceous film a homogeneous first-order reaction was found to predominate. For initial pressures within the range 4-40 cm mercury the rate coefficients for the homogeneous reaction were expressible as������� k = 5.88 x 1013exp(-50,000 cal/RT) sec-1. There was some evidence for the rate coefficient becoming pressure-dependent below 5-10 mm initial pressure of reactant. The reaction exhibited no induction periods and the velocity was virtually unaffected by the addition of large amounts of propene or cyclohexene and traces of chlorine or bromine. The results were consistent with a unimolecular elimination of hydrogen chloride.

DFT studies of homogeneous catalysis in the gas phase: Dehydration kinetics of several tertiary alcohols with hydrogen chloride

2011 ◽  
Vol 112 (1) ◽  
pp. 78-88 ◽  
Author(s):  
Jose R. Mora ◽  
David J. Marquez ◽  
Edgar Marquez ◽  
Marcos Loroño ◽  
Tania Cordova ◽  
...  
Keyword(s):  
Gas Phase ◽  
Hydrogen Chloride ◽  
Homogeneous Catalysis ◽  
Dehydration Kinetics ◽  
Dft Studies ◽  
Tertiary Alcohols ◽  
Kinetics Of

Kinetics of thermal decomposition of aseptic packages

2013 ◽  
Vol 67 (12) ◽  
Author(s):  
Juma Haydary ◽  
Dalibor Susa
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Parameters ◽  
Flow Reactor ◽  
Independent Set ◽  
Kinetics Of Thermal Decomposition ◽  
Thermogravimetric Data ◽  
Type Flow ◽  
Apparent Kinetic Parameters ◽  
Kinetics Of

AbstractKinetics of thermal decomposition of aseptic packages (e.g. Tetrapak cartons) and pyrolysis of this waste in a laboratory flow reactor was studied. Three different models for the calculation of the reaction rate and the determination of apparent kinetic parameters of thermal decomposition were used. The first method assumes a two stage thermal decomposition and the kinetic parameters were determined by fitting a derivative thermogravimetric (DTG) curve to experimentally determined thermogravimetric data of whole aseptic cartons. The second method uses kinetic parameters determined by fitting DTG curves to thermogravimetric data of individual components of aseptic packages. The last method was a multi-curve isoconversion method assuming a change of kinetic parameters with the increasing conversion. All types of the determined kinetic parameters were used in a mathematical model for thermal decomposition of mini briquettes made from aseptic packages at the temperature of 650°C. The model calculated also the heat conduction in the particles and it was verified by an independent set of experiments conducted in a laboratory screw type flow reactor.

Understanding photoelectrochemical kinetics in a model CO2 fixation reaction

2019 ◽  
Vol 21 (32) ◽  
pp. 17517-17520 ◽  
Author(s):  
Bingju Zhong ◽  
Da He ◽  
Ruonan Chen ◽  
Tianyue Gao ◽  
Yuanxing Wang ◽  
...  
Keyword(s):  
Co2 Fixation ◽  
Reaction Order ◽  
Rate Determining Step ◽  
Fixation Reaction ◽  
Kinetics Of

The kinetics of photoelectro-catalytic fixation of CO2 has been studied in a model process, which reveals the rate-determining step and reaction order.

Thallic Ion Oxidation of Styrene: Kinetics of Decomposition of the Oxythallation Adduct C6H5—CH(OCH3)—CH2Tl(OAc)2

1974 ◽  
Vol 52 (15) ◽  
pp. 2667-2672 ◽  
Author(s):  
Louise Nadon ◽  
Miklos Zador
Keyword(s):  
Kinetic Parameters ◽  
Reactive Species ◽  
Rate Law ◽  
First Order ◽  
Order Rate ◽  
Rate Determining Step ◽  
Kinetics Of Decomposition ◽  
Low Concentrations ◽  
Kinetics Of

The kinetics of decomposition of the organo-thallic adduct formed in methanol between styrene and Tl(OAc)3, (C6H5—CH(OCH3)—CH2—Tl(OAc)2) has been studied in a water–methanol solvent. The reaction follows a first order rate law. The organo-thallic compound, RTl(OAc)2, is shown to be dissociated at low concentrations yielding two reactive species, RTlOH+ and RTl2+. The influence of acidity on the rate of decomposition shows that RTl2+ is much more reactive than RTiOH+. The kinetic parameters have been determined. The implication of the results on the rate-determining step of Tl(III) oxidation of styrene is discussed.

The kinetics and mechanisms of the gas phase pyrolyses of exo-2-norbornyl chloride and cyclopentyl chloride

1979 ◽  
Vol 57 (19) ◽  
pp. 2621-2625 ◽  
Author(s):  
J. L. Holmes ◽  
D. L. McGillivray ◽  
D. Yuan
Keyword(s):  
Gas Phase ◽  
Hydrogen Chloride ◽  
Isotope Effect ◽  
Deuterium Isotope Effect ◽  
Temperature Range ◽  
Elimination Reactions ◽  
Chloride Elimination ◽  
Kinetics Of

The gas phase pyrolyses of exo-2-norbornyl chloride and cyclopentyl chloride were studied in the temperature range 570–670 K. The results obtained show that these compounds behave as typical secondary halides insofar as the kinetics of their hydrogen chloride elimination reactions are concerned. Labelling experiments showed that in the formation of both norbornene and cyclopentene, a cis-1,2 elimination with a deuterium isotope effect of ∼3 was involved. Nortricyclene also was produced from exo-2-norbornyl chloride, via a trans 1,3 elimination; this process is analogous to a fragmentation of the ionized molecule. No gas phase Wagner–Meerwein rearrangement was involved in the formation of either norbornene or nortricyclene.

Catalysis by hydrogen chloride in the gas-phase elimination kinetics of 2-phenyl-2-propanol and 3-methyl-1-buten-3-ol

2007 ◽  
Vol 20 (1) ◽  
pp. 44-48 ◽  
Author(s):  
Rafael J. Rasse ◽  
Rosa M. Domínguez ◽  
Armando Herize ◽  
Maria Tosta ◽  
Doris Brusco ◽  
...  
Keyword(s):  
Gas Phase ◽  
Hydrogen Chloride ◽  
Elimination Kinetics ◽  
Kinetics Of ◽  
Phase Elimination

The thermally induced rearrangements of 2-vinyloxirane

1976 ◽  
Vol 54 (21) ◽  
pp. 3364-3376 ◽  
Author(s):  
Robert J. Crawford ◽  
Stuart B. Lutener ◽  
Robert D. Cockcroft
Keyword(s):  
Carbon Monoxide ◽  
Gas Phase ◽  
Isotope Effects ◽  
Kinetic Isotope Effects ◽  
Thermally Induced ◽  
Rate Determining Step ◽  
Kinetic Isotope ◽  
Carbonyl Ylide ◽  
Structural Isomerization ◽  
Kinetics Of

The kinetics of the gas phase thermolysis of 2-vinyloxirane (4) have been studied over the temperature range 270–310 °C. The racemization of chiral 4 occurs six times faster than the structural isomerization to 2,3-dihydrofuran, (E)- and (Z)-2-butenal, and 3-butenal. The butenals undergo a slow thermolysis to propene and carbon monoxide. cis-Deuterio- and trans-3-deuterio-vinyloxirane have been synthesized and their interconversion is slow. Deuterium kinetic isotope effects on mono- and dideuterio-4 suggest that for the formation of the butenals the rate determining step involves rupture of the oxirane C—O bond. The dihydrofuran is produced by thermolysis of the oxirane C—C bond. The preferred mechanistic interpretation is that a carbon–oxygen diradical serves as an intermediate for butenal formation, and that a carbonyl-ylide is involved in the formation of the dihydrofuran.The relative rates, at 307.4 °C, of cis–trans-5-isomerization:dihydrofuran formation:racemization: butenal formation for 3-deuterio-2-vinyloxirane are 1.0:0.88:40.2:5.94, respectively.

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