ChemInform Abstract: Coking Reaction by Anthracene on Acidic Aluminas and Silica-Aluminas.
Abstract
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ChemInform Abstract
In order to define the role of acidic sites during the coking reaction, the alumina catalysts are modified by addition of chloride. An increase of the alumina acidity leads to an increase of coke deposits at low temp., whereas the opposite effect occurs at high temperatures. Under the same conditions, the amounts of coke are greater on silica- alumina than on alumina, but the higher the coking temp., the lower the amount of coke. The different behavior is discussed in terms of the presence of Broensted acidic sites on silica-alumina.
