Phenol and Tetralin Co-Conversion Regularities under Catalytic Cracking Conditions

Abstract

The effect of an oxygen-containing compound on the cracking of an aromatic hydrocarbon is studied using the example of a model phenol–tetralin mixture. An analysis of the temperature dependences of the cracking rate constant of tetralin and tetralin in a mixture with phenol indicates that tetralin cracking is ihhibited during its co-conversion with an oxygen-containing compound due to the greater adsorption capacity of phenol on the catalyst’s surface. It is found that phenol in the model mixture changes the composition of liquid products, especially at low cracking temperatures. The effect of water on the conversion of a phenol-tetralin mixture is studied. It is established that water in the model feedstock reduces the inhibition of the cracking reaction of an aromatic hydrocarbon by an oxygen-containing compound. Based on the results of catalytic reactions, it is determined that when water is added, the level of the overall conversion of the mixture and the conversion of tetralin increase regardless of temperature. No appreciable qualitative differences between the distributions of cracking products in model mixtures with and without water have been revealed.