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Water Catalysis of the Reaction between Methanol and OH at 294 K and the Atmospheric Implications.
Jara-Toro, Rafael A; Hernández, Federico J; Taccone, Raúl A; Lane, Silvia I; Pino, Gustavo A.
Afiliação
  • Jara-Toro RA; INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-, Facultad de Ciencias Químicas-, Centro Láser de Ciencias Moleculares-, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA, Córdoba, Argentina.
  • Hernández FJ; INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-, Facultad de Ciencias Químicas-, Centro Láser de Ciencias Moleculares-, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA, Córdoba, Argentina.
  • Taccone RA; INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-, Facultad de Ciencias Químicas-, Centro Láser de Ciencias Moleculares-, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA, Córdoba, Argentina.
  • Lane SI; INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-, Facultad de Ciencias Químicas-, Centro Láser de Ciencias Moleculares-, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA, Córdoba, Argentina.
  • Pino GA; INFIQC (CONICET-UNC). Dpto. de Fisicoquímica-, Facultad de Ciencias Químicas-, Centro Láser de Ciencias Moleculares-, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA, Córdoba, Argentina.
Angew Chem Int Ed Engl ; 56(8): 2166-2170, 2017 02 13.
Article em En | MEDLINE | ID: mdl-28079951
The rate coefficient for the reaction CH3 OH+OH was determined by means of a relative method in a simulation chamber under quasi-real atmospheric conditions (294 K, 1 atm of air) and variable humidity or water concentration. Under these conditions, a quadratic dependence of the rate coefficient for the reaction CH3 OH+OH on the water concentration was found. Thus the catalytic effect of water is not only important at low temperatures, but also at room temperature. The detailed mechanism responsible of the reaction acceleration is still unknown. However, this dependence should be included in the atmospheric global models since it is expected to be important in humid regions as in the tropics. Additionally, it could explain several differences regarding the global and local atmospheric concentration of methanol in tropical areas, for which many speculations about the sinks and sources of methanol have been reported.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: Angew Chem Int Ed Engl Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Argentina País de publicação: Alemanha
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: Angew Chem Int Ed Engl Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Argentina País de publicação: Alemanha