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Title: A shock tube study of the CO + OH {yields} CO{sub 2} + H reaction

Abstract

The rate coefficient for the title reaction has been determined using mixtures of nitric acid (HNO{sub 3}), carbon monoxide (CO), and argon in incident shock wave experiments. Upon shock heating, the nitric acid rapidly decomposes into OH and NO{sub 2}. The OH subsequently reacts predominantly via the title reaction. Quantitative OH time histories were obtained by continuous-wave (cw) narrow-linewidth UV laser absorption of the R{sub 1}(5) line of the A{sup 2}{Sigma}{sup +} {l_arrow} X{sup 2}{Pi}{sub i} (0,0) transition at 32,606.56 cm{sup {minus}1} (vacuum). In some experiments, helium was added to the reactant mixture to examine CO vibrational excitation effects on the rate coefficient determination. It was found that the rate of excited CO (v = 1) with OH is less than the rate of ground-state CO (v = 0) with OH, which is in agreement with previous state-dependent work. The experiments were conducted over the temperature range 1,090--2,370 K and the pressure range 0.19--0.82 atm. The second-order rate coefficient was determined to be k{sub 1}(T) = 2.12 {times} 10{sup 12} exp[{minus}2630/T (K)] (cm{sup 3}/mol s) with overall uncertainties of + 16, {minus}12 % at high temperatures and + 19, {minus} 22 % at low temperatures. These results are in goodmore » agreement with recent studies of the reaction and are well fit by a chemically activated intermediate model. The current work also provides a link to previous low-temperature data.« less

Authors:
; ;  [1]
  1. Stanford Univ., CA (United States)
Publication Date:
OSTI Identifier:
93222
Report Number(s):
CONF-940711-
TRN: IM9537%%265
Resource Type:
Book
Resource Relation:
Conference: 25. international symposium on combustion, Irvine, CA (United States), 31 Jul - 5 Aug 1994; Other Information: PBD: 1994; Related Information: Is Part Of Twenty-fifth symposium (international) on combustion; PB: 1838 p.
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; CARBON MONOXIDE; CHEMICAL REACTIONS; HYDROXYL RADICALS; HYDROCARBONS; COMBUSTION KINETICS; NITRIC ACID; CARBON DIOXIDE; ABSORPTION SPECTRA; ACTIVATION ENERGY; MATHEMATICAL MODELS; AIR POLLUTION; EXPERIMENTAL DATA

Citation Formats

Wooldridge, M.S., Hanson, R.K., and Bowman, C.T. A shock tube study of the CO + OH {yields} CO{sub 2} + H reaction. United States: N. p., 1994. Web.
Wooldridge, M.S., Hanson, R.K., & Bowman, C.T. A shock tube study of the CO + OH {yields} CO{sub 2} + H reaction. United States.
Wooldridge, M.S., Hanson, R.K., and Bowman, C.T. Sat . "A shock tube study of the CO + OH {yields} CO{sub 2} + H reaction". United States. doi:.
@article{osti_93222,
title = {A shock tube study of the CO + OH {yields} CO{sub 2} + H reaction},
author = {Wooldridge, M.S. and Hanson, R.K. and Bowman, C.T.},
abstractNote = {The rate coefficient for the title reaction has been determined using mixtures of nitric acid (HNO{sub 3}), carbon monoxide (CO), and argon in incident shock wave experiments. Upon shock heating, the nitric acid rapidly decomposes into OH and NO{sub 2}. The OH subsequently reacts predominantly via the title reaction. Quantitative OH time histories were obtained by continuous-wave (cw) narrow-linewidth UV laser absorption of the R{sub 1}(5) line of the A{sup 2}{Sigma}{sup +} {l_arrow} X{sup 2}{Pi}{sub i} (0,0) transition at 32,606.56 cm{sup {minus}1} (vacuum). In some experiments, helium was added to the reactant mixture to examine CO vibrational excitation effects on the rate coefficient determination. It was found that the rate of excited CO (v = 1) with OH is less than the rate of ground-state CO (v = 0) with OH, which is in agreement with previous state-dependent work. The experiments were conducted over the temperature range 1,090--2,370 K and the pressure range 0.19--0.82 atm. The second-order rate coefficient was determined to be k{sub 1}(T) = 2.12 {times} 10{sup 12} exp[{minus}2630/T (K)] (cm{sup 3}/mol s) with overall uncertainties of + 16, {minus}12 % at high temperatures and + 19, {minus} 22 % at low temperatures. These results are in good agreement with recent studies of the reaction and are well fit by a chemically activated intermediate model. The current work also provides a link to previous low-temperature data.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Dec 31 00:00:00 EST 1994},
month = {Sat Dec 31 00:00:00 EST 1994}
}

Book:
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