Autoignition of hydrogen/air mixtures by a thin catalytic wire

Treviño, César; Liñán Martínez, Amable y Kurdyumov, V. (2000). Autoignition of hydrogen/air mixtures by a thin catalytic wire. En: "28 Symposium (International) on Combustion", 30 July 2000 through 4 August 2000, Colorado at Boulder, Boulder, Colorado.

Descripción

Título: Autoignition of hydrogen/air mixtures by a thin catalytic wire
Autor/es:
  • Treviño, César
  • Liñán Martínez, Amable
  • Kurdyumov, V.
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 28 Symposium (International) on Combustion
Fechas del Evento: 30 July 2000 through 4 August 2000
Lugar del Evento: Colorado at Boulder, Boulder, Colorado
Título del Libro: 28 Symposium (International) on Combustion
Fecha: 2000
Volumen: 28
Materias:
Palabras Clave Informales: Adsorption; Approximation theory; Catalysis; Computer simulation; Desorption; Heat convection; Heat losses; Hydrogen; Ignition; Palladium; Rate constants; Reynolds number; Surface reactions; Thermal effects; Catalytic ignition; Thin catalytic wires; Mixed gas fuels
Escuela: E.T.S.I. Aeronáuticos (UPM) [antigua denominación]
Departamento: Motopropulsión y Termofluidodinámica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The autoignition of the catalytic reaction of hydrogen/air mixtures on thin palladium wires is analyzed in this paper. The reduced heterogeneous kinetics is modeled with a mechanism that includes the dissociative adsorption of both reactants, together with three surface reactions of the Langmuir-Hinshelwood type, and the desorption reaction of the adsorbed product, H2O(s). We show that for the description of the ignition conditions, this mechanism can be simplified to a single overall surface reaction involving the temperature and gas concentrations of the reactants at the surface of the wire. The resulting overall rate for the surface reaction has been tested with existing experimental results, after describing the transport of heat and reactants, by natural convection, in the gas phase for a wide range of Rayleigh numbers. The critical conditions for the catalytic ignition have been deduced using high activation energy asymptotics for the desorption kinetics of the most efficiently adsorbed reactant, H(s).

Más información

ID de Registro: 918
Identificador DC: http://oa.upm.es/918/
Identificador OAI: oai:oa.upm.es:918
Depositado por: Archivo Digital UPM
Depositado el: 22 Abr 2009
Ultima Modificación: 20 Abr 2016 06:35
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