Thermal decomposition of hydrogen cyanide in shock waves.
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概要
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The thermal decomposition of hydrogen cyanide diluted to 0.2, 0.5, and 1.0 mol% in argon was studied behind incident shock waves over the temperature range 2600–3600 K. The decomposition process was followed by monitoring the CN X<SUP>2</SUP>Σ<SUP>+</SUP>-B<SUP>2</SUP>Σ<SUP>+</SUP> (0-0) absorption centered at 3883 Å. The bimolecular rate constants for the reaction HCN+Ar→H+CN+Ar were obtained from the initial slopes of absorption; <I>k</I><SUB>1</SUB>=(1.26±0.28)×10<SUP>16</SUP>exp[–(99.69±1.39)kcal mol<SUP>−1</SUP>/<I>RT</I>] cm<SUP>3</SUP> mol<SUP>−1</SUP> s<SUP>−1</SUP>. The kinetic results are well fitted by the classical collision-theory expression, <I>k</I><SUB>1</SUB>=λ(<I>Z</I>⁄<I>n</I>!)(<I>E</I>⁄<I>RT</I>)<I><SUP>n</SUP></I>exp(–<I>E</I>⁄<I>RT</I>), with λ=0.22, <I>n</I>=3.5, and <I>E</I>=<I>D</I><SUB>0</SUB>(H–CN)= 118.7 kcal/mol. The overall absorption profiles were found to be explicable on the basis of the reaction scheme involving the homorecombinations of H and CN as well as the chain reaction with H and CN as carrier species.
- 公益社団法人 日本化学会の論文
著者
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Kajimoto Okitsugu
Department Of Chemistry Graduate School Of Science Kyoto University
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Okada Kazuo
Department Of Anesthesiology School Of Medicine Teikyo University
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Tabayashi Kiyohiko
Department Of Chemistry Graduate School Of Science Hiroshima University
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Fueno Takayuki
Department of Chemistry, Faculty of Engineering Science, Osaka University
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Tabayashi Kiyohiko
Department of Chemistry, Faculty of Engineering Science, Osaka University
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Takasa Kenji
Department of Chemistry, Faculty of Engineering Science, Osaka University
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