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Titolo:
Numerical studies of the heterogeneous combustion of char using detailed chemistry
Autore:
Miessen, G; Behrendt, F; Deutschmann, O; Warnatz, J;
Indirizzi:
Univ Heidelberg, Interdisziplinares Zentrum Wissensch Rechnen, D-69120 Heidelberg, Germany Univ Heidelberg Heidelberg Germany D-69120 , D-69120 Heidelberg, Germany
Titolo Testata:
CHEMOSPHERE
fascicolo: 5-7, volume: 42, anno: 2001,
pagine: 609 - 613
SICI:
0045-6535(200102/03)42:5-7<609:NSOTHC>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
GASIFICATION REACTIONS; UNIFIED MECHANISM; SURFACE; CARBON; OXIDATION; CO2; O-2;
Keywords:
computer simulations; graphite; nitrous oxide; modelling of surface kinetics;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Behrendt, F Univ Heidelberg, Interdisziplinares Zentrum Wissensch Rechnen,NeuenheimerFeld 368, D-69120 Heidelberg, Germany Univ Heidelberg Neuenheimer Feld 368 Heidelberg Germany D-69120
Citazione:
G. Miessen et al., "Numerical studies of the heterogeneous combustion of char using detailed chemistry", CHEMOSPHERE, 42(5-7), 2001, pp. 609-613

Abstract

The oxidation of graphite is used as a model system for the combustion of char. In order to understand this oxidation process a stagnation-point flowof an oxygen stream on a graphite surface is investigated numerically. Thechemical reactions in the gas phase as well as on the surface are modelledby a series of elementary steps. The surface reactions take into consideration the different surface complexes formed, the influence of the geometry of the graphite surface and the interaction of gas-phase molecules with surface complexes. The rate coefficients used are estimated by applying methods of the microkinetic analysis of heterogeneous catalytic reactions. The: mechanism is used to simulate the combustion rate of a graphite surface and the ratio of CO to CO2 formed un the surface. The simulation results are compared with experimental data and a good agreement is achieved. Furthermore, the fraction of char-bound nitrogen converted to N-2 and N2O is calculated. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 08:37:40