Calculation of reaction order for the homogeneous pyrolysis of organic vapors

1969 ◽  
Vol 47 (14) ◽  
pp. 2707-2712 ◽  
Author(s):  
John Torok ◽  
Samuel Sandler
Keyword(s):  
Free Radical ◽  
Reaction Order ◽  
Chain Termination ◽  
Recombination Reaction ◽  
Mathematical Equation ◽  
Methyl Radical ◽  
Radical Chain ◽  
Organic Vapors ◽  
Chain Reactions ◽  
Chain Termination Reaction

A method is proposed for the derivation of a mathematical equation that relates the kinetic parameters of the propagation reactions of homogeneous free-radical chain reactions to the overall order of the reaction. The equation may be used in evaluating the predominant chain-termination reaction, provided that the mechanism of propagation of the chain is well understood. Application of the technique is demonstrated for the pyrolysis of n-butane. It predicts the predominance of the methyl–methyl radical recombination reaction.

scholarly journals The detection and inhibition of free radical chain reactions

1942 ◽  
Vol 180 (982) ◽  
pp. 237-256 ◽  
Keyword(s):  
Nitric Oxide ◽  
Free Radical ◽  
Chemical Analysis ◽  
Diethyl Ether ◽  
Pressure Increase ◽  
Stationary States ◽  
Decomposition Rates ◽  
Radical Chain ◽  
Chain Reactions ◽  
Limiting Values

Part I. Comparison of nitric oxide and propylene as inhibitors The reduction by propylene of the rate of pressure increase in the decomposition of propaldehyde at 550° has been shown by chemical analysis to represent a true inhibition of the reaction, and not to be due n an important degree to an induced polymerization of the propylene. With propaldehyde and with diethyl ether the limiting values to which the decomposition rates are reduced by nitric oxide and by propylene respectively are the same, although much more propylene is required to produce a given degree of inhibition. From this it is concluded that the limiting rates are more probably those of independent non-chain processes, than those characteristic of stationary states where the inhibitor starts and stops chains with equal efficiency.

scholarly journals Evidence that Criegee intermediates drive autoxidation in unsaturated lipids

2020 ◽  
Vol 117 (9) ◽  
pp. 4486-4490 ◽  
Author(s):  
Meirong Zeng ◽  
Nadja Heine ◽  
Kevin R. Wilson
Keyword(s):  
Free Radical ◽  
Radical Chain ◽  
Chain Reactions ◽  
Unsaturated Lipids ◽  
Criegee Intermediates ◽  
Age Related ◽  
Lipid Autoxidation ◽  
Free Radical Chain Reaction ◽  
Cyclic Network ◽  
Radical Chain Reaction

Autoxidation is an autocatalytic free-radical chain reaction responsible for the oxidative destruction of organic molecules in biological cells, foods, plastics, petrochemicals, fuels, and the environment. In cellular membranes, lipid autoxidation (peroxidation) is linked with oxidative stress, age-related diseases, and cancers. The established mechanism of autoxidation proceeds via H-atom abstraction through a cyclic network of peroxy–hydroperoxide-mediated free-radical chain reactions. For a series of model unsaturated lipids, we present evidence for an autoxidation mechanism, initiated by hydroxyl radical (OH) addition to C=C bonds and propagated by chain reactions involving Criegee intermediates (CIs). This mechanism leads to unexpectedly rapid autoxidation even in the presence of water, implying that as reactive intermediates, CI could play a much more prominent role in chemistries beyond the atmosphere.

Free radical chain reactions involving alkyl- and alkenylmercurials

1989 ◽  
Vol 22 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Glen A. Russell
Keyword(s):  
Free Radical ◽  
Radical Chain ◽  
Chain Reactions

Combustion of Hydrocarbons - Free Radical Chain Reactions

1949 ◽  
Vol 41 (5) ◽  
pp. 893-897 ◽  
Author(s):  
P. L. Cramer ◽  
J. M. Campbell
Keyword(s):  
Free Radical ◽  
Radical Chain ◽  
Chain Reactions

Free radical chain reactions of 3-fluoro-3-iodo-β-lactams

1993 ◽  
Vol 34 (19) ◽  
pp. 3087-3090 ◽  
Author(s):  
Robert Kawecki ◽  
John T. Welch
Keyword(s):  
Free Radical ◽  
Radical Chain ◽  
Chain Reactions

Kinetics of Ionic and Free Radical Chain Reactions in Radiation Chemistry

1969 ◽  
Vol 6 (5) ◽  
pp. 466-473
Author(s):  
Donald H. Martin ◽  
Robert B. Taylor ◽  
Ffrancon Williams
Keyword(s):  
Free Radical ◽  
Radiation Chemistry ◽  
Radical Chain ◽  
Chain Reactions ◽  
Kinetics Of

Free-Radical Chain Reactions Involving Hydrogen and Bromine Atom Transfer Induced by TiO2-Mediated Photocatalysis

Langmuir ◽  
1999 ◽  
Vol 15 (4) ◽  
pp. 1141-1146 ◽  
Author(s):  
Shlomo Gershuni ◽  
Norbert Itzhak ◽  
Joseph Rabani
Keyword(s):  
Free Radical ◽  
Bromine Atom ◽  
Atom Transfer ◽  
Radical Chain ◽  
Chain Reactions

ChemInform Abstract: Free Radical Chain Reactions Involving Saturated and Unsaturated Alkylmercurials

ChemInform ◽  
2010 ◽  
Vol 22 (22) ◽  
pp. no-no
Author(s):  
G. A. RUSSELL
Keyword(s):  
Free Radical ◽  
Radical Chain ◽  
Chain Reactions
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