Kinetic study of the absolute rate constant for the reaction between K + N2O by time-resolved atomic resonance absorption spectroscopy

D. Husain, Yook Heng Lee

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7 Citations (Scopus)

Abstract

We present a kinetic study of the reaction K+N2O→KO+N2 (kR) across the temperature range 701-903K by direct monitoring of atomic potassium in the time-resolved mode. K(42S 1 2) was generated by the pulsed irradiation of KI vapor at elevated temperatures and studied by time-resolved atomic resonance absorption spectroscopy in the "single-shot mode" using the Rydberg doublet at λ = 404 nm (K(52PJ) ← K(42S 1 2)). Measurements of the rate constant, kR, at different temperatures yielded the following Arrhenius form: kr=(1.4±0.10)×10-10exp -8.6±1.2kJ mol-1 RTcm3 molecule-1S-1, a result similar to that for the analogous reaction between Na + N2O, and permitting reaction (1) to be employed as a titration technique for the quantitative preparation of KO and the subsequent kinetic study of this diatomic species. Reaction (1) also provides a kinetic standard for atomic potassium at elevated temperatures.

Original languageEnglish
Pages (from-to)177-183
Number of pages7
JournalCombustion and Flame
Volume68
Issue number2
DOIs
Publication statusPublished - 1987
Externally publishedYes

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Absorption spectroscopy
Rate constants
absorption spectroscopy
Kinetics
kinetics
Potassium
potassium
Temperature
temperature
Titration
titration
shot
Vapors
Irradiation
vapors
preparation
Molecules
irradiation
Monitoring
molecules

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Mechanical Engineering

Cite this

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title = "Kinetic study of the absolute rate constant for the reaction between K + N2O by time-resolved atomic resonance absorption spectroscopy",
abstract = "We present a kinetic study of the reaction K+N2O→KO+N2 (kR) across the temperature range 701-903K by direct monitoring of atomic potassium in the time-resolved mode. K(42S 1 2) was generated by the pulsed irradiation of KI vapor at elevated temperatures and studied by time-resolved atomic resonance absorption spectroscopy in the {"}single-shot mode{"} using the Rydberg doublet at λ = 404 nm (K(52PJ) ← K(42S 1 2)). Measurements of the rate constant, kR, at different temperatures yielded the following Arrhenius form: kr=(1.4±0.10)×10-10exp -8.6±1.2kJ mol-1 RTcm3 molecule-1S-1, a result similar to that for the analogous reaction between Na + N2O, and permitting reaction (1) to be employed as a titration technique for the quantitative preparation of KO and the subsequent kinetic study of this diatomic species. Reaction (1) also provides a kinetic standard for atomic potassium at elevated temperatures.",
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AU - Husain, D.

AU - Lee, Yook Heng

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N2 - We present a kinetic study of the reaction K+N2O→KO+N2 (kR) across the temperature range 701-903K by direct monitoring of atomic potassium in the time-resolved mode. K(42S 1 2) was generated by the pulsed irradiation of KI vapor at elevated temperatures and studied by time-resolved atomic resonance absorption spectroscopy in the "single-shot mode" using the Rydberg doublet at λ = 404 nm (K(52PJ) ← K(42S 1 2)). Measurements of the rate constant, kR, at different temperatures yielded the following Arrhenius form: kr=(1.4±0.10)×10-10exp -8.6±1.2kJ mol-1 RTcm3 molecule-1S-1, a result similar to that for the analogous reaction between Na + N2O, and permitting reaction (1) to be employed as a titration technique for the quantitative preparation of KO and the subsequent kinetic study of this diatomic species. Reaction (1) also provides a kinetic standard for atomic potassium at elevated temperatures.

AB - We present a kinetic study of the reaction K+N2O→KO+N2 (kR) across the temperature range 701-903K by direct monitoring of atomic potassium in the time-resolved mode. K(42S 1 2) was generated by the pulsed irradiation of KI vapor at elevated temperatures and studied by time-resolved atomic resonance absorption spectroscopy in the "single-shot mode" using the Rydberg doublet at λ = 404 nm (K(52PJ) ← K(42S 1 2)). Measurements of the rate constant, kR, at different temperatures yielded the following Arrhenius form: kr=(1.4±0.10)×10-10exp -8.6±1.2kJ mol-1 RTcm3 molecule-1S-1, a result similar to that for the analogous reaction between Na + N2O, and permitting reaction (1) to be employed as a titration technique for the quantitative preparation of KO and the subsequent kinetic study of this diatomic species. Reaction (1) also provides a kinetic standard for atomic potassium at elevated temperatures.

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