✦ LIBER ✦

Cracking and oxidation of methane under electrical discharge in the presence of carbon dioxide, water vapor and oxygen

✍ Scribed by Pio Capezzuto; Francesco Cramarossa; Riccardo D'Agostino; Ettore Molinari

Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 694 KB
Volume: 33
Category: Article
ISSN: 0010-2180
DOI: 10.1016/0010-2180(78)90064-0

No coin nor oath required. For personal study only.

✦ Synopsis

The oxidation of CH 4 with CO2, H20(v ) and 0 2 has been studied under radiofrequency plasmas at a pressure of 20 Torr, by feeding the reactor with mixtures of methane and oxidizing agents, at variable gas flow rates (6-30 liters (STP) rain -1) and power densities (2-8 cal cm -3 sec--1). The oxidation rates, which are several orders of magnitude higher than those observed in thermal oxidation at comparable gas temperatures, have been compared with the results obtained for the decomposition of CH 4 in mixture with H2, under similar plasma conditions. Evidence is presented that for the system CH4/CO 2 and CH4/H20(v ) the primary step of the oxidation process very likely involves the rupture of a C-H bond and that the main route for the conversion of CH 4 into CO is via C2-hydrocarbons , while for the CH4/O 2 system a direct conversion of CH 4 into CO can occur through self-accelerated radical chain reactions.

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