Petroleum Science (Nov 2019)

Effect of WC/Ni–Cr additive on changes in the composition of an atmospheric residue in the course of cracking

  • Galina S. Pevneva,
  • Natalya G. Voronetskaya,
  • Nikita N. Sviridenko,
  • Anatoly K. Golovko

DOI
https://doi.org/10.1007/s12182-019-00402-3
Journal volume & issue
Vol. 17, no. 2
pp. 499 – 508

Abstract

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Abstract The paper presents the results of investigation of changes in the composition of hydrocarbons and sulfur-containing compounds of an atmospheric residue in the course of cracking in the presence of a tungsten carbide–nickel–chromium (WC/Ni–Cr) catalytic additive and without it. The cracking is carried out in an autoclave at 500 °C for 30 min. The addition of the WC/Ni–Cr additive promotes the deepening of reactions of destruction not only of resins and asphaltenes, but also high molecular weight naphthene-aromatic compounds of the atmospheric residue. It is shown that the content of low molecular weight C9–C17 n-alkanes and C9–C10 alkylbenzenes rose sharply in the products of cracking with addition of WC/Ni–Cr in comparison with those produced without the additive. Alkyl- and naphthene-substituted aromatic hydrocarbons of benzene, naphthalene, phenanthrene series, polyarenes, benzo- and dibenzothiophenes are identified.

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