An analytical model has been derived for chemisorption of cyanogen chloride
in ASC carbon. This model, derived from the mass balance differential equa
tion, uses simplified rate expressions for both the external diffusion and
the reaction each with a decay function. Agreements between the calculated
and experimental breakthroughs of cyanogen chloride are reasonably good. Ho
wever, the selected values for transfer coefficients and rate constants req
uire additional data for further verifications of the rate controlling step
s assumed in the model. (C) 1999 Elsevier Science S.A. All rights reserved.