Study of consecutive mechanism of desorption with diffusion step under non-isothermal conditions

Abstract

A mechanism of desorption consecutive with diffusion into the micropores of a solid phase is postulated. In the development of the consecutive model complex integrals were obtained; these are solved using the Gauss-Kronrod method of numerical integration. Theoretical temperature programmed desorption spectra (TDS) are calculated. The influence of diffusion parameters on the position and shape of the calculated TDS were investigated. Kinetic parameters calculated using methods based on the change of temperature of the peak maximum and those assumed in the calculation of theoretical spectra are compared. © 1992.