Accession Number : AD0689477

Title :   STUDY OF THE MECHANISM OF THE ELECTROCHEMICAL OXIDATION OF HYDROCARBONS BY EXPERIMENTAL SEPARATION OF REACTION STEPS.

Descriptive Note : Final technical rept. Jan-Dec 68,

Corporate Author : CONSERVATOIRE NATIONAL DES ARTS ET METIERS PARIS (FRANCE) ELECTROCHEMISTRY LAB

Personal Author(s) : Bonnemay,M. ; Bronoel,G. ; Doniat,D. ; Levart,E.

Report Date : JAN 1969

Pagination or Media Count : 39

Abstract : A selective analysis of adsorption applied to a hydrocarbon - platinum system was used to obtain quantitative data concerning the initial activation energy of adsorption, the value of the adsorption interaction coefficient, and the number of sites occupied as the result of the adsorption of a molecule. These data were determined at temperatures of 80 and 90C in normal sulphuric acid. It was also possible to establish a comparison with diluted phosphoric acid in the case of certain reactants. The values obtained for the initial activation energy of adsorption and the number of sites show that, under these conditions, it is the end groups of the chain which are attacked, each group losing one hydrogen atom. In the case of a hydrocarbon having a branching chain, such as iso-butane, it is the three methyl groups which lose one hydrogen atom each. The initial activation energy of adsorption is higher as the chain is longer for the same number of groups affected in a molecule. On the other hand, the longer the chain the lower is the coefficient of interaction. Lastly, the higher the temperature the more pronounced is the dehydrogenation. (Author)

Descriptors :   (*HYDROCARBONS, OXIDATION), (*FUEL CELLS, HYDROCARBONS), (*ELECTROCHEMISTRY, HYDROCARBONS), CATALYSTS, PLATINUM, ADSORPTION, DEHYDROGENATION, SURFACE PROPERTIES, FRANCE, CAPACITANCE, ELECTRIC DOUBLE LAYER

Subject Categories : Physical Chemistry
      Electric Power Production and Distribution

Distribution Statement : APPROVED FOR PUBLIC RELEASE