کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
240721 1427929 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Kinetics and thermochemistry of the addition of atomic chlorine to acetylene
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Kinetics and thermochemistry of the addition of atomic chlorine to acetylene
چکیده انگلیسی

Atomic Cl was generated by pulsed laser photolysis at 193 nm of CCl4, and was monitored by time resolved resonance fluorescence in the course of reaction with excess C2H2, diluted in Ar bath gas at pressures from 13 to 800 mbar. At 288 K simple pseudo first order kinetics were observed. Over 365–430 K bi-exponential decays were obtained, because of equilibration between the β-chlorovinyl adduct and the reactants. The ratios of forward and reverse rate constants yield ΔfH298(CHCHCl) = 274.0 ± 1.0 kJ mol−1 via a Third-Law analysis of the carbon–chlorine bond strength. The thermochemistry compares well with that predicted by an initio theory. The effective second-order rate constant was pressure dependent and was analyzed using Troe’s unimolecular formalism. Over the whole temperature range the low-pressure limiting value for addition, with Ar bath gas, is given by k0 = 4.1 × 10−30 (T/300 K)−2.47 cm6 molecule−2 s−1.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Proceedings of the Combustion Institute - Volume 31, Issue 1, January 2007, Pages 193–200
نویسندگان
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