Photolysis of carbon dioxide and methane mixtures at 873 and 293 K with 163.3 nm light

Autor: John W. Falconer, Derrick E. Hoare, Ralph Overend
Rok vydání: 1973
Předmět:
Zdroj: Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases. 69:1541
ISSN: 0300-9599
Popis: Nearly all work with O(1D) atoms has been conducted at room temperature. A system is described whereby photolysis of carbon dioxide at 163.3 nm may be used as a source of O(1D) atoms at a range of temperatures extending above 873 K.At 873 K the reaction of O(1D) atoms with methane gave much the same products as O(3P) atoms, thus little or no methanol was found by stabilisation of the complex formed by an insertion reaction of O(1D) atoms. The low quantum yields of oxygen which have often been reported in the photolysis of carbon dioxide can be caused by a carbon-containing surface layer.The results favour an intermediate value for the rate constant of O(3P) with methane (k2= 400 mol–1 l. s–1 at 293 K) and agree with relative rate constants for the deactivation of O(1D) atoms at room temperature, obtained by Scott and Cvetanovic.
Databáze: OpenAIRE