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Internal Heterogeneity in Catalysts – Methods of Preparation and their Influence on Final Activity and Selectivity
Author(s) -
Cervelló José,
de la Banda Juan F. Garcia,
Hermana Enrique,
Jiménez Juan Francisco
Publication year - 1976
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.330480605
Subject(s) - selectivity , catalysis , diffusion , chemistry , distribution (mathematics) , thermodynamics , chemical engineering , biological system , organic chemistry , mathematics , physics , mathematical analysis , biology , engineering
Solid catalysts often have a non‐uniform internal composition as a result of their method of preparation and working conditions. Such products sometimes command interest because of their better performance. Variables influencing internal distribution during their preparation are considered on the basis of experimental and theoretical studies. Activity and selectivity of these catalysts depend upon the internal distribution of the active species. Activation energies, reaction orders, and apparent diffusion coefficients are masked in relation to their real values, due to the mutual interdependence between mass transport phenomena and chemical reaction.