Revue de l'Institut Français du Pétrole
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1989, Volume 44, n° 06, p. 813 - 823 |
Thermal Decomposition of Methane Bibliographic Study and Proposal of a Mechanism
| Article in |
English
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| Authors |
FREUND, E. (Institut Français du Pétrole(1))
BUSSON, C. (Institut Français du Pétrole (Vernaison)(2))
WEILL, J. (Institut Français du Pétrole (Vernaison)(2))
BILLAUD, F. (Institut National Polytechnique de Lorraine-ENSIC (3))
BARONNET, F; (Institut National Polytechnique de Lorraine-ENSIC (3))
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| Abstract |
This review article gives the state-of-the-art of the upgrading of methane by the purely thermal route. It sums up the principal research since 1960 by giving, for each project, the operating conditions, type of reactor and the main results (order, inhibition of the reaction). It also comments on the reactions and the elementary processes written as well as the contribution of new kinetic constants.
It emphasizes the effects of temperature, of dilution by inert gases, by hydrogen, by ethane and by water as well as the wall effects.
After analyzing a great many publications dealing with the thermal decomposition of methane, this article attempts to give a mechanism and the major stages for which there seems to be a consensus among different authors and that account for the formation of hydrogen, ethane, ethylene, propene and acetylene. This mechanism can be broken down as follows :
(a) Primary formation of ethane and hydrogen.
(b) Secondary reactions of ethane.
(c) Secondary reactions of ethylene.
(d) Secondary reactions of acetylene.
(e) Secondary reactions of propene.
This mechanism has also made possible the excellent simulation of the formation of all the above-mentioned products. However, concerning the formation of liquid hydrocarbons and coke, there is no coherent mechanism capable of simulating their formation.
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(1) 1 et 4, avenue de Bois-Préau,
92852 Rueil-Malmaison Cedex - France
(2) Centre d'Etudes et de Développement Industriels, BP 3,
69390 Vernaison - France
(3) Département de Chimie Physique des Réactions, URA 328 CNRS,
1 rue Granville, BP 451,
54001 Nancy Cedex, France
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