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Pyrolysis of 2-butyne/vinylacetylene mixtures between 350 and 450°C

✍ Scribed by Charles Harper; Julian Heicklen

Publisher
John Wiley and Sons
Year
1988
Tongue
English
Weight
523 KB
Volume
20
Category
Article
ISSN
0538-8066

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✦ Synopsis

Vinylacetylene and 2-butyne mixtures were pyrolyzed a t 350-450°C in the absence and presence of 0, and NO. The major product of the reaction is a polymer, but o-xylene is also produced and was studied as the species of interest. The C,H,,i formation rate is first-order in C,H, and C,H,. The rate coefficient is best fitted by log [kiCfiH1,), M-' s '1 = 14.33 * 0.58 -(80.1 2 7.4)/2.3RT 1.hough it is not inconsistent with log [k(CsH,,i), M s ' 1 = (7.93) -i125.9)/2.3RT where R is the ideal gas constant in kJ/mol-K. 0-xylene formation occurs by two processes: a concerted molecular mechanism (267%) and a singlet diradical mechanism (=33%).

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