The temperature dependence, the influence of photo-irradiation, and the partial pressure dependence of the reactive gases for the rate of the chorination of γ-alumina by carbon monoxide and chlorine have been studied by thermogravimetry. On elevating the temperature the rate of the reaction increased monotonously. The process was found to proceed in three main kinetic regions, i.e. chemical, mixed chemical and pore diffusion, and outer diffusion regions, for which apparent activation energies E1 = 106-118, E2= 56 and E3 = 23 kJ mole-1 were determined. Photo-irradiation at 673-873 K led to an increase in the reaction rates. In the temperature range 973-1058 K the maximum reaction rates were obtained not with a 1:1 mixture of CO:Cl2, but when a small excess of chlorine was used.
ASJC Scopus subject areas
- Condensed Matter Physics
- Physical and Theoretical Chemistry