ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
To predict the effect of pore structure on the performance of heterogeneous catalysts, a realistic model of the catalyst particle is required. Lattice-based models in which the diffusion and reaction phenomena are restricted to sites and bonds within a regular or irregular lattice are widely used. However, for the realistic simulation of diffusion and reaction in amorphous catalyst supports, such as alumina or silica, a continuum model, which does not artificially restrict the domain in which the reactants are allowed to diffuse, is required.An efficient method based on a “first passage time” approach is developed for the simulation of diffusion and reaction in a supported catalyst. The model catalyst is composed of spheres representing the support and active sites. By varying the algorithm used to generate the model catalyst, a range of structures can be created. The effect of the structure, and the size and distribution of active sites on the reaction rate is studied.
Additional Material:
19 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690410415
Permalink
