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7752212 
Journal Article 
COKE FORMATION IN THE THERMAL-CRACKING OF HYDROCARBONS 
Froment, GF 
1990 
1 
Reviews in Chemical Engineering
ISSN: 0167-8299 
6 
4 
293-328 
English 
WOS:A1990FU69100002 
After a brief review of various chemical pathways leading to coke a description is given of a unit specifically built for coking studies. Results are presented for ethane, hexane and naphtha cracking. Various factors affecting coke formation are investigated: the dilution ratio, temperature, conversion, the coil material, the addition of organic sulphur derivatives or other chemical compounds. On the basis of this work and of the examination of commercial coke samples, mechanisms for coke formation are derived: gas phase coking, coke formation catalyzed by the wall, growth from existing coke layers onwards. Finally, a computer simulation of an ethane propane cracker, accounting for the coke formation, is presented.