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The role of paraffin wax in the formation of minor products in the catalytic cracking of petroleum distillates over La‐Y
Author(s) -
John Thomas M.,
Wojciechowski Bohdan W.
Publication year - 1976
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.5450540618
Subject(s) - wax , fluid catalytic cracking , distillation , cracking , coke , gasoline , catalysis , yield (engineering) , paraffin wax , chemistry , olefin fiber , chemical engineering , organic chemistry , refining (metallurgy) , vacuum distillation , mixing (physics) , reactivity (psychology) , materials science , metallurgy , medicine , physics , alternative medicine , pathology , quantum mechanics , engineering
An investigation of the role of paraffin wax in the catalytic cracking of wax‐bearing petroleum distillates has been carried out in a fixed‐bed reactor containing La‐Y catalyst over a temperature range from 482° to 524°C. By using the concept of initial product selectivity derived from the time‐on‐stream theory of catalyst decay, it was found that increasing the wax content of the feedstocks resulted in an increase in the yield of C 5 + gasoline and a decrease in the yields of most of the gaseous products and of coke. Ethane and propylene and the olefin content of the gasoline increased in yield with the addition of wax. The mixing of cracking feedstocks has only a linear effect on the reactivity and no synergistic effects in any of the observed properties of the reaction are in fact observed.