Pyrolysis of hydrocarbon mixtures characteristic of coal: Application to dibenzyl mixture

✍ Scribed by Dominique Depeyre; Magdalena Urhan; Chantal Flicoteaux

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 758 KB
• Volume: 64
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(85)90389-8

✦ Synopsis

Thermal cracking ofdibenzyl dissolved in two solvents, tetralin and decalin, has been studied in a flow reactor, in the presence of steam, under atmospheric pressure and at temperatures between 600 and 750°C. The nature of the products obtained depends upon the structure of the hydrogen-donor agent, but is independent of the structure of dibenzyl. Valuable products such as ethylene and a benzene, toluene and xylene @TX) mixture, obtained by a fi-scission reaction with a monomolecular mechanism, are predominant when decalin is used as solvent. The dehydrogenation of tetralin to naphthalene precedes cracking reactions of the bimolecular type, which lead to significant production of hydroaromatics such as indene. Cracking of dibenzyl, followed by hydrogen transfer from the solvent to the radicals formed, leads to toluene irrespective of the chemical nature of the hydrogen donor.