Effect of hydrogen chloride on the pyrolysis of acetylene as studied with a single-pulse shock tube.

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概要

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• The pyrolysis of acetylene in the presence of hydrogen chloride was investigated with a single-pulse shock tube in the temperature range 1100–1680 K. The hydrocarbons produced in the C<SUB>2</SUB>H<SUB>2</SUB>–HCl system were quite the same as those obtained in the C<SUB>2</SUB>H<SUB>2</SUB>–Ar system. The formation rate of the main pyrolysis product, 1-buten-3-yne, was reduced remarkably by the addition of hydrogen chloride, being of third-order and of inverse first-order with respect to the concentrations of acetylene and hydrogen chloride, respectively. The overall second-order rate constant obtained was<BR>k(cm^3 mol^-1 s^-1)=2.9×10^12exp (-45800/RT). <BR>As the chlorine atom containing product, only chloroacetylene was found in small amounts, its formation rate being of second-order with respect to acetylene. The inhibitory effect of hydrogen chloride on the 1-buten-3-yne formation rate was interpreted in terms of the change in the termination from the recombination reaction of 2-ethynylvinyl radical to the reaction of 2-ethynylvinyl radical with hydrogen chloride.

• 公益社団法人 日本化学会の論文

著者

• Ogura Hiroo

  Institute of Space and Aeronautical Science, The University of Tokyo

関連論文

• Shock tube study on the mechanism of hydrogenation and pyrolysis of acetylene.
• Effect of hydrogen chloride on the pyrolysis of acetylene as studied with a single-pulse shock tube.
• Shock tube study of the H-D exchange reaction between acetylene and deuterium.

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