Kinetics and mechanisms of the reaction of CH with H2O

  • Bergeat A
  • Moisan S
  • Méreau R
 et al. 
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Abstract

The rate constant for the CH + H2O reaction has been measured in a fast-flow reactor to be (0.9 ± 0.4) × 10-11cm3molecule-1s-1at 330 K. The product branching ratio of H atoms probed by resonance fluorescence is determined to be 100%. Quantum chemistry and statistical calculations show that the rate limiting process is the isomerisation of the HCOH2adduct to H2COH and allow us to propose k = (2.8 ± 1.4) × 10-11(T/300)-1.22 ± 0.07exp(-(12 ± 12)/T) cm3molecule-1s-1in the range 100-700 K for the rate constant of CH + H2O → H + H2CO and H2+ H + CO. © 2009 Elsevier B.V. All rights reserved.

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Authors

  • Astrid Bergeat

  • Sandy Moisan

  • Raphaël Méreau

  • Jean Christophe Loison

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