STUDY ON CATALYTIC CRACKING BEHAVIOR AND COKE FORMATION OF TETRALIN

Abstract

Abstract: Using a small fixed fluidized bed (ACE) test device, the catalytic cracking behavior and coke formation of tetralin as a model compound were studied over REY-C and USY-C catalysts at 460-540 ℃ and 4-16 h^-1 space velocity. The results showed that the cracking products of tetralin on REY-C and USY-C catalysts were similar, and the strong acidity of molecular sieves was beneficial to the catalytic cracking reaction, C3-C5 hydrocarbons, C6-C10 monocyclic aromatics and bis-cyclic aromatics such as indane, methylindane and naphthalene were mainly produced on REY-C, USY-C. The yield order of the products from large to small was bis-cyclic aromatic hydrocarbons, monocyclic aromatic hydrocarbons, non aromatic hydrocarbons. The yield of coke increased with the increase of reaction temperature, conversion and acid content of molecular sieve, and decreased with the increase of space velocity.

Key words: tetralin, catalytic cracking, molecular sieve, catalyst, coking, reaction mechanism

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