Abstract: According to the multicomponent diffusion model for effectiveness factors of porous catalysts and its numerical computing method proposed by the authors in the first part of this paper, the effectiveness factors of high-temperature shift reaction catalyst B109 have been calculated in the second part, and they are compared with the experimentally observed values. The porosity, pore-size distribution, tortuosity factor and intrinsic kinetics at atmospheric pressure of shift catalyst B109 have been measured, and the global reaction rates only taking account of the intraparticle diffusion in 9.8×8.3mm cylindrical pellets of catalyst B109 under various conditions of gaseous compositions and temperature at atmospheric pressure have been investigated in an internal recycle gradientless reactor. The experimentally observed values of effectiveness factors obtained therefrom under sixteen conditions are from 0.142 to 0.455, and the relative errors of model prediction values with respect to experimentally observed values under the same reaction conditions are in the range of -0.25 to 0.06. The results of comparison are satisfactory.