TY - JOUR
T1 - New approximate model for nonlinear adsorption and concentration dependent surface diffusion in a single particle
AU - Botte, Gerardine G.
AU - Zhang, Ruyu
AU - Ritter, James A.
N1 - Funding Information:
The authors gratefully acknowledge financial support from the National Science Foundation under Grant CTS-9410630, the Westvaco Charleston Research Center, and the Separations Research Program at the University of Texas at Austin.
PY - 1999
Y1 - 1999
N2 - A new approximate model for nonlinear adsorption (Langmuir model) and concentration dependent surface diffusion (HIO model) in a single particle was derived, based on a parabolic concentration profile assumption for the summation of the gas and adsorbed phases. The surface diffusivity was approximated with the adsorbed phase concentration evaluated at the surface of the particle, as the average of the adsorbed phase concentration, and as the average of the first two approximations. Overall, the approximate model based on the average of the first two approximations compared the best with the exact solution for a wide variety of systems and conditions.
AB - A new approximate model for nonlinear adsorption (Langmuir model) and concentration dependent surface diffusion (HIO model) in a single particle was derived, based on a parabolic concentration profile assumption for the summation of the gas and adsorbed phases. The surface diffusivity was approximated with the adsorbed phase concentration evaluated at the surface of the particle, as the average of the adsorbed phase concentration, and as the average of the first two approximations. Overall, the approximate model based on the average of the first two approximations compared the best with the exact solution for a wide variety of systems and conditions.
UR - http://www.scopus.com/inward/record.url?scp=0033334811&partnerID=8YFLogxK
U2 - 10.1023/A:1008960716126
DO - 10.1023/A:1008960716126
M3 - Article
AN - SCOPUS:0033334811
SN - 0929-5607
VL - 5
SP - 373
EP - 380
JO - Adsorption
JF - Adsorption
IS - 4
ER -