In order to determine the effective surface self-diffusion coefficients of CO2 in type-13X zeolite particles, at 25 to 70C, inverse analyses of observed CO2-uptake curves were performed. The resultant effective surface self-diffusioncoefficients increased with both the amount adsorbed and temperature (table 4) and ranged from 7.8 x 10−10 to 1.95 x 10−9m2/s.

Inverse Analyses of Diffusion Processes in Type 13X Zeolite Particles. A.Goubaru, S.Abe, Ermalina, K.Kamiuto: Applied Energy, 2005, 81[3], 277–90