Kinetics and mechanism of the electrochemical oxidation of graphite in bisulphate melts

The kinetics of the electrochemical oxidation of graphite to volatile compounds by electrolysing molten bisulphates in the temperature range from 180 to 320°C has been studied by conventional steady-state and non-steady-state measurements. CO<sub>2</sub>, CO and traces of SO<sub>2&...

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Autores principales: Arvia, Alejandro Jorge, Triaca, Walter Enrique, Videla, Héctor A.
Formato: Articulo
Lenguaje:Inglés
Publicado: 1970
Materias:
Ciencias Exactas
Química
Electrochemical oxidation
Kinetics
Graphite
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/121692
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-121692
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Electrochemical oxidation
Kinetics
Graphite
spellingShingle Ciencias Exactas
Química
Electrochemical oxidation
Kinetics
Graphite
Arvia, Alejandro Jorge
Triaca, Walter Enrique
Videla, Héctor A.
Kinetics and mechanism of the electrochemical oxidation of graphite in bisulphate melts
topic_facet Ciencias Exactas
Química
Electrochemical oxidation
Kinetics
Graphite
description The kinetics of the electrochemical oxidation of graphite to volatile compounds by electrolysing molten bisulphates in the temperature range from 180 to 320°C has been studied by conventional steady-state and non-steady-state measurements. CO<sub>2</sub>, CO and traces of SO<sub>2</sub> are formed during the electrochemical reaction. Assuming 4 Faraday/mol of CO<sub>2</sub>, the anodic efficiency is about 90%. The CO<sub>2</sub>/CO ratio is about 2 and is independent of the cd in the range considered. The electrochemical reaction is compared to the thermal oxidation of graphite. The reaction is interpreted through a scheme involving consecutive reactions, where the rate-determining step, under Temkin conditions, is a thermal process involving a desorption of intermediates following either a first-order or second-order process depending on the type of adsorption obeyed. The activation energy derived from the rate constant at the rest potential is about 42·5 Kcal/mol.
format Articulo
Articulo
author Arvia, Alejandro Jorge
Triaca, Walter Enrique
Videla, Héctor A.
author_facet Arvia, Alejandro Jorge
Triaca, Walter Enrique
Videla, Héctor A.
author_sort Arvia, Alejandro Jorge
title Kinetics and mechanism of the electrochemical oxidation of graphite in bisulphate melts
title_short Kinetics and mechanism of the electrochemical oxidation of graphite in bisulphate melts
title_full Kinetics and mechanism of the electrochemical oxidation of graphite in bisulphate melts
title_fullStr Kinetics and mechanism of the electrochemical oxidation of graphite in bisulphate melts
title_full_unstemmed Kinetics and mechanism of the electrochemical oxidation of graphite in bisulphate melts
title_sort kinetics and mechanism of the electrochemical oxidation of graphite in bisulphate melts
publishDate 1970
url http://sedici.unlp.edu.ar/handle/10915/121692
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AT triacawalterenrique kineticsandmechanismoftheelectrochemicaloxidationofgraphiteinbisulphatemelts
AT videlahectora kineticsandmechanismoftheelectrochemicaloxidationofgraphiteinbisulphatemelts
bdutipo_str Repositorios
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