Effects of olefins on the thermal decomposition of propane part V. Effect of butene‐2‐Cis

A. Dombi, P. Huhn

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The thermal decomposition of butene‐2‐cis at low conversion and its effect on the pyrolysis of propane have been studied in the temperature range 779‐812 K. It was established that 2‐butene decomposes in a long‐chain process, with the chain cycle (Formula Presented.) (Formula Presented.) (Formula Presented.) (Formula Presented.) (Formula Presented.) (Formula Presented.) (Formula Presented.) (Besides the radical path, the molecular reaction (Formula Presented.) can also play a role in the formation of the products.) The thermal decomposition of propane is considerably inhibited by 2‐butene, which can be explained by the fact that the less reactive radicals formed in the reactions between the olefin and the chain‐carrying radicals regenerate the chain cycle more slowly than the original radicals in the above chain cycle or in the reactions (Formula Presented.) (Formula Presented.) The reactions of the 2‐propyl radical (Formula Presented.) (Formula Presented.) are further initiation steps. The ratios of the rate coefficients of the elementary steps of the decomposition (Table III) have been determined via the ratios of the products. Estimation of the radical concentrations indicated that only the methyl, 2‐propyl and methylallyl radicals are of importance in the chain termination. On the basis of the inhibition‐influenced curves, the role of the bimolecular initiation steps. (Formula Presented.) (Formula Presented.) could be clarified in the presence of 2‐butene.

Original languageEnglish
Pages (from-to)313-328
Number of pages16
JournalInternational Journal of Chemical Kinetics
Volume18
Issue number3
DOIs
Publication statusPublished - 1986

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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