Gas-phase hydroxyl radical emission in the thermal decomposition of lithium hydroxide

Suguru Noda; Masateru Nishioka; Masayoshi Sadakata

doi:10.1021/jp984238+

Gas-phase hydroxyl radical emission in the thermal decomposition of lithium hydroxide

Suguru Noda^*, Masateru Nishioka, Masayoshi Sadakata

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The gas-phase hydroxyl (OH) radical emission was observed in the thermal decomposition of lithium hydroxide (LiOH). This phenomenon was investigated in a vacuum flow tube reactor at around 2 Torr by the temperature programmed reaction (TPR) experiments at 500-1300 K. The production of OH and other gaseous products was quantitatively investigated by the laser induced fluorescence method and quadrupole mass spectrometry, respectively. The TPR spectra of OH had a peak at 1100-1200 K, which largely exceeded the gas-phase thermodynamic equilibrium. The origin of OH was supposed to be either the surface OH groups on Li₂O or the residual LiOH in the LiOH/Li₂O solid solution. OH production exceeding the thermodynamic equilibrium was explained by means of the partial equilibrium in the reaction: LiOH + 1/4O₂ ⇔ 1/2Li₂O + OH. This phenomenon can be a new route for the OH production from H₂O and O₂ in cyclic reactions of lithium compounds.

Original language	English
Pages (from-to)	1954-1959
Number of pages	6
Journal	Journal of Physical Chemistry B
Volume	103
Issue number	11
DOIs	https://doi.org/10.1021/jp984238+
Publication status	Published - 1999 Mar 18
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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title = "Gas-phase hydroxyl radical emission in the thermal decomposition of lithium hydroxide",

abstract = "The gas-phase hydroxyl (OH) radical emission was observed in the thermal decomposition of lithium hydroxide (LiOH). This phenomenon was investigated in a vacuum flow tube reactor at around 2 Torr by the temperature programmed reaction (TPR) experiments at 500-1300 K. The production of OH and other gaseous products was quantitatively investigated by the laser induced fluorescence method and quadrupole mass spectrometry, respectively. The TPR spectra of OH had a peak at 1100-1200 K, which largely exceeded the gas-phase thermodynamic equilibrium. The origin of OH was supposed to be either the surface OH groups on Li2O or the residual LiOH in the LiOH/Li2O solid solution. OH production exceeding the thermodynamic equilibrium was explained by means of the partial equilibrium in the reaction: LiOH + 1/4O2 ⇔ 1/2Li2O + OH. This phenomenon can be a new route for the OH production from H2O and O2 in cyclic reactions of lithium compounds.",

author = "Suguru Noda and Masateru Nishioka and Masayoshi Sadakata",

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TY - JOUR

T1 - Gas-phase hydroxyl radical emission in the thermal decomposition of lithium hydroxide

AU - Noda, Suguru

AU - Nishioka, Masateru

AU - Sadakata, Masayoshi

PY - 1999/3/18

Y1 - 1999/3/18

N2 - The gas-phase hydroxyl (OH) radical emission was observed in the thermal decomposition of lithium hydroxide (LiOH). This phenomenon was investigated in a vacuum flow tube reactor at around 2 Torr by the temperature programmed reaction (TPR) experiments at 500-1300 K. The production of OH and other gaseous products was quantitatively investigated by the laser induced fluorescence method and quadrupole mass spectrometry, respectively. The TPR spectra of OH had a peak at 1100-1200 K, which largely exceeded the gas-phase thermodynamic equilibrium. The origin of OH was supposed to be either the surface OH groups on Li2O or the residual LiOH in the LiOH/Li2O solid solution. OH production exceeding the thermodynamic equilibrium was explained by means of the partial equilibrium in the reaction: LiOH + 1/4O2 ⇔ 1/2Li2O + OH. This phenomenon can be a new route for the OH production from H2O and O2 in cyclic reactions of lithium compounds.

AB - The gas-phase hydroxyl (OH) radical emission was observed in the thermal decomposition of lithium hydroxide (LiOH). This phenomenon was investigated in a vacuum flow tube reactor at around 2 Torr by the temperature programmed reaction (TPR) experiments at 500-1300 K. The production of OH and other gaseous products was quantitatively investigated by the laser induced fluorescence method and quadrupole mass spectrometry, respectively. The TPR spectra of OH had a peak at 1100-1200 K, which largely exceeded the gas-phase thermodynamic equilibrium. The origin of OH was supposed to be either the surface OH groups on Li2O or the residual LiOH in the LiOH/Li2O solid solution. OH production exceeding the thermodynamic equilibrium was explained by means of the partial equilibrium in the reaction: LiOH + 1/4O2 ⇔ 1/2Li2O + OH. This phenomenon can be a new route for the OH production from H2O and O2 in cyclic reactions of lithium compounds.

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JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 11

ER -

Gas-phase hydroxyl radical emission in the thermal decomposition of lithium hydroxide

Abstract

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