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Diffusion effects in catalytic gas oil cracking
Author(s) -
Best D. A.,
Pachovsky R. A.,
Wojciechowski B. W.
Publication year - 1971
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450490617
Subject(s) - cracking , catalysis , diffusion , fluid catalytic cracking , homogeneous , materials science , thermodynamics , chemistry , chemical engineering , composite material , organic chemistry , physics , engineering
Wojciechowski's four parameter model of catalyst decay is applied to conversion data for gas oil cracking over a diffusion limited catalyst. The parameters thus obtained are compared with those obtained previously for a diffusion free form of the same catalyst, cracking the same feed stock under identical experimental conditions. The comparison shows that the presence of diffusion affects not only the rate of catalytic cracking but also the rate of aging. It is also shown that the introduction of diffusion phenomena has no effect on the mechanism of aging. The presence of diffusion limitations however has the effect of making the feed stock appear more homogeneous in reactivity