The computed values of the effective diffusion coefficient, De, ranging from 4.93 x 10-10 to 5.96 x 10-10m2/s were obtained from kinetic data for the adsorption of 1,2-dichloropropane from a mixture with air onto activated carbon particles at concentrations within the range of 14.94 to 31.51g/m3. Such kinetic adsorption data were obtained over a range of 24.1 of 25.8C. Using the dependence De = f(cAo), it was possible to compare the calculated values of De for 1,2-dichloropropane with experimental data for 1,2-dichloro-ethane obtained from adsorption measurements. The values of the effective diffusion coefficients for 1,2-dichloropropane as calculated from its desorption by pure air were within the range of 1.67 x 10-10 to 2.01 x 10-10m2/s at 24.0 to 24.2C. The considerable difference between the values of the effective diffusion coefficient for 1,2-dichloropropane in activated carbon particles as estimated from adsorption and desorption data was suggested to be associated with the non-linear course of the adsorption isotherm.

The Diffusion of Chlorinated Hydrocarbons in Particles of Activated Carbon. Bobok, D., Besedová, E.: Adsorption Science and Technology, 2001, 19[10], 813-20