Kinetics of the thermal decomposition of bis-pentafluorine sulfur peroxide in the presence of carbon monoxide

1978 ◽  
Vol 10 (1) ◽  
pp. 111-116 ◽  
Author(s):  
J. Czarnowski ◽  
H. J. Schumacher
Keyword(s):  
Thermal Decomposition ◽  
Carbon Monoxide ◽  
Kinetics Of

Kinetic Study of the Pyrolysis of Formaldehyde

1972 ◽  
Vol 50 (7) ◽  
pp. 992-998 ◽  
Author(s):  
C. J. Chen ◽  
D. J. McKenney
Keyword(s):  
Activation Energy ◽  
Thermal Decomposition ◽  
Carbon Monoxide ◽  
Kinetic Study ◽  
Pressure Range ◽  
Heterogeneous Reaction ◽  
Experimental Results ◽  
Arrhenius Parameters ◽  
Rate Laws ◽  
Kinetics Of

Kinetics of the thermal decomposition of pure formaldehyde were studied over a temperature range of 466–516 °C and a pressure range of ~ 50–160 Torr. Arrhenius parameters and rate laws were determined for carbon monoxide, hydrogen and methanol as follows:[Formula: see text]A mechanism is postulated which is qualitatively consistent with the experimental results but the activation energy for reaction 1[Formula: see text]is ~15 kcal/mol lower than predicted from recent thermochemical data, suggesting the possibility of a heterogeneous reaction.

Kinetics of the thermal decomposition of cyclobutanone

1969 ◽  
Vol 47 (4) ◽  
pp. 615-617 ◽  
Author(s):  
Arthur T. Blades
Keyword(s):  
Activation Energy ◽  
Thermal Decomposition ◽  
Carbon Monoxide ◽  
Rate Constant ◽  
Relative Rate ◽  
Relative Rate Constant ◽  
Pressure Sensitive ◽  
Photochemical Decomposition ◽  
Kinetics Of ◽  
Constant Expression

The thermal decomposition of cyclobutanone into cyclopropane and carbon monoxide has been shown to occur simultaneously with the major decomposition to ethylene and ketene. The relative rate constant expression is given by [Formula: see text] Both reactions are pressure sensitive below 10 Torr and this quasi-unimolecular behavior is most pronounced in the cyclopropane forming reaction, consistent with the higher activation energy. The data are also discussed in relation to the photochemical decomposition and it is shown that cyclopropane formation from the ground singlet is an important feature of the photolysis at 3130 Å.

THE THERMAL DECOMPOSITION OF PHENYLACETIC ACID

1960 ◽  
Vol 38 (8) ◽  
pp. 1261-1270 ◽  
Author(s):  
Margaret H. Back ◽  
A. H. Sehon
Keyword(s):  
Carbon Dioxide ◽  
Activation Energy ◽  
Thermal Decomposition ◽  
Carbon Monoxide ◽  
Rate Constant ◽  
Phenylacetic Acid ◽  
Order Process ◽  
First Order ◽  
Kinetics Of ◽  
Dissociation Step

The thermal decomposition of phenylacetic acid was investigated by the toluene-carrier technique over the temperature range 587 to 722 °C. The products of the pyrolysis were carbon dioxide, carbon monoxide, hydrogen, methane, dibenzyl, and phenylketene. From the kinetics of the decomposition it was concluded that the reaction[Formula: see text]was a homogeneous, first-order process and that the rate constant of this dissociation step was represented by the expression k = 8 × 1012.e−55,000/RT sec−1. The activation energy of this reaction may be identified with D(C6H5CH2—COOH). The possible reactions of carboxyl radicals are discussed.

The kinetics of the thermal decomposition of trifluoroacetaldehyde

1965 ◽  
Vol 18 (10) ◽  
pp. 1561 ◽  
Author(s):  
NL Arthur ◽  
TN Bell
Keyword(s):  
Thermal Decomposition ◽  
Carbon Monoxide ◽  
Rate Equation ◽  
Surface Effect ◽  
Inert Gases ◽  
Radical Chain ◽  
Small Surface ◽  
Experimental Rate ◽  
Products Of Reaction ◽  
Kinetics Of

The thermal decomposition of trifluoroacetaldehyde has been studied at temperatures between 471� and 519�, and at pressures up to 180 mm. The main products of reaction are trifluoromethane and carbon monoxide in equal amounts; small amounts of hexafluoroethane and hydrogen are also formed. The experimental rate equation governing the observed kinetics is of the form Rate = k?[CF3CHO]3/2, where k? = 1012.2exp(-49000/RT) l.� mole-1 sec-1 A small surface effect is apparent, an increase in surface area causing an increase in rate. Inert gases, namely carbon monoxide and dioxide, increase the rate of decomposition, the experimental rate equation assuming the form Rate = (k'[CF3CHO]3 + k"[CF3CHO]2.2[M])� A mechanism is proposed which predict,^ the experimental form of the rate equation and involves initiation through a second-order energy transfer process followed by a radical chain mechanism, the length of which is 1200 with P(CF3CHO) = 200 mm. Termination is considered to be through the third-order recombination of trifluoromethyl radicals.

Kinetics of Thermal Decomposition of Lime Stone

1967 ◽  
Vol 53 (7) ◽  
pp. 740-743 ◽  
Author(s):  
Kiyoshi SAWAMURA ◽  
Kazuichi MIZOGUCHI ◽  
Tetsuro HANADA ◽  
Kunihiko MAKINO
Keyword(s):  
Thermal Decomposition ◽  
Kinetics Of Thermal Decomposition ◽  
Kinetics Of ◽  
Lime Stone

Thermal Decomposition Kinetics of Torrefied Oil Palm Empty Fruit Bunch Briquettes

2016 ◽  
Vol 10 (3) ◽  
pp. 325-328 ◽  
Author(s):  
Bemgba Nyakuma ◽  
◽  
Arshad Ahmad ◽  
Anwar Johari ◽  
Tuan Abdullah ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Oil Palm ◽  
Decomposition Kinetics ◽  
Thermal Decomposition Kinetics ◽  
Kinetic Properties ◽  
Tg Analysis ◽  
Empty Fruit Bunches ◽  
Thermal Lag ◽  
Profile Characteristics ◽  
Kinetics Of

The study is aimed at investigating the thermal behavior and decomposition kinetics of torrefied oil palm empty fruit bunches (OPEFB) briquettes using a thermogravimetric (TG) analysis and the Coats-Redfern model. The results revealed that thermal decomposition kinetics of OPEFB and torrefied OPEFB briquettes is significantly influenced by the severity of torrefaction temperature. Furthermore, the temperature profile characteristics; Tonset, Tpeak, and Tend increased consistently due to the thermal lag observed during TG analysis. In addition, the torrefied OPEFB briquettes were observed to possess superior thermal and kinetic properties over the untorrefied OPEFB briquettes. It can be inferred that torrefaction improves the fuel properties of pelletized OPEFB for potential utilization in bioenergy conversion systems.

Thermal Decomposition Kinetics of Glyphosate (GP) and its Metabolite Aminomethylphosphonic Acid (AMPA)

2019 ◽  
Author(s):  
Milad Narimani ◽  
Gabriel da Silva
Keyword(s):  
Thermal Decomposition ◽  
Reaction Rate ◽  
Decomposition Kinetics ◽  
Rate Theory ◽  
Thermal Decomposition Mechanism ◽  
Treatment Processes ◽  
Aminomethylphosphonic Acid ◽  
Reaction Rate Theory ◽  
Decomposition Chemistry ◽  
Kinetics Of

Glyphosate (GP) is a widely used herbicide worldwide, yet accumulation of GP and its main byproduct, aminomethylphosphonic acid (AMPA), in soil and water has raised concerns about its potential effects to human health. Thermal treatment processes are one option for decontaminating material containing GP and AMPA, yet the thermal decomposition chemistry of these compounds remains poorly understood. Here, we have revealed the thermal decomposition mechanism of GP and AMPA by applying computational chemistry and reaction rate theory methods. <br>

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