About this Chemistry article
Les Réactions En Chai'nes et Les Propriétés Des Mélanges Inflammables de Méthane et D'air by A. Van Tiggelen is a Chemistry article available to read on EtoBox.
Les r&actions en chaines et les propriht6s des mdanges inflammables de m6thane et d'air par A. VAN TIGGELEN (Louvoin) ( I ) SLMMARY. -1. A chain reaction mechanism is proposed for the inflammation of CH,, the individual branching reaction requiring an activation energy of about 40 kcalories. This value is deduced from the experimental data on the lag on ignition according to the chain reaction theory of Semenoff. 2. Assuming that for a slow propagating flame (as in CH, -air mixtures) the speed depends on the reaction rate rather than on physical factors as conductivity and heat capacity, a very simple expression for the '' fundamental speed " of flames can be found. It allows to predict the fundamental speed changes in function of the initial temperature and in function of the addition of inert gases. 3. Factors which modify the ignition temperature are considered; their action is explained qualitatively in terms of the same theory. 4. Conditions for no propagation of the flame are considered in relation with the protections devices against firedamp explosions. Plate protection devices and wire gauzes are effective because the desappearance of the active centres on the walls prior
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- Author
- A. Van Tiggelen
- Publisher
- Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 0037-9646)
- Published
- 2010
- Language
- EN
- Field
- Chemistry (Physical Sciences)