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Effects of Lewis acid catalysts on the hydrogenation and cracking of three-ring aromatic and hydroaromatic structures related to coal

✍ Scribed by Sadie S. Salim; Alexis T. Bell

Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 845 KB
Volume: 63
Category: Article
ISSN: 0016-2361
DOI: 10.1016/0016-2361(84)90281-3

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✦ Synopsis

Little is known about the hydrogenation and cracking of fused aromatic nuclei during the liquefaction of coal under the influence of Lewis acid catalysts. This study was conducted to establish the effects of catalyst acidity on the activity and selectivity of Lewis acid catalysts, the sources of hydrogen involved in hydrogenation and cracking, and the relationships between reactant structure and reactivity. Three-ring aromatic and hydroaromatic compounds were used to simulate some of the structural units present in coal. The catalysts examined were ZnCI, and AICI,. It has been established that the rates of both

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Effects of Lewis acid catalysts on the cleavage of aliphatic and aryl-aryl linkages in coal-related structures

✍ Newell D. Taylor; Alexis T. Bell 📂 Article 📅 1980 🏛 Elsevier Science 🌐 English ⚖ 917 KB

ZnClq and AICl3 catalyse the cleavage of aliphatic linkages between aromatic nuclei but not the cleavage of direct aryl-aryl bonds between such nuclei. The rate of alkyl-aryl bond breakage depends on the Bronsted acidity of the active catalyst (e.g. H+(ZnCl2X)-or H+(AlCl3X)-) and the Bronsted basici