Biomass catalytic steam gasification thermodynamics analysis and reaction experiments in a CREC riser simulator / Enrique Salaices in Industrial & engineering chemistry research, Vol. 49 N° 15 (Août 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 15 (Août 2010) . - pp 6834–6844 Titre : Biomass catalytic steam gasification thermodynamics analysis and reaction experiments in a CREC riser simulator Type de document : texte imprimé Auteurs : Enrique Salaices, Auteur ; Benito Serrano, Auteur ; Hugo De Lasa, Auteur Année de publication : 2010 Article en page(s) : pp 6834–6844 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Catalytic Thermodynamics Gasification. Résumé : A thermodynamic equilibrium model based on evaluations involving C, H, and O element balances and various product species up to C6 hydrocarbons is reported in this study. This model establishes the effects of biomass composition, temperature, and steam on the various gas product molar fractions. On this basis, most significant parameters determining the chemical interconversions and distribution of chemical species are identified. On the basis of the proposed equilibrium model and using glucose as a model biomass species [C6H12O6], an optimum gasification temperature close to 800 °C and a steam/biomass ratio between 0.5 and 0.7 g/g is established. This study has the special value of comparing thermodynamic equilibrium predictions with experimental data obtained in a CREC riser simulator using a fluidizable Ni−Al2O3 catalyst. Results are relevant for scaled-up gasifiers. They show that for reaction times longer than 30 s chemical species are essentially equilibrated and that the proposed model does provide adequate description of various product fractions. Data obtained also demonstrate the shortcomings of equilibrium models for gasifiers with reaction times shorter than 10 s and the need for nonequilibrium models to describe gasifier performance at such conditions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901710n [article] Biomass catalytic steam gasification thermodynamics analysis and reaction experiments in a CREC riser simulator [texte imprimé] / Enrique Salaices, Auteur ; Benito Serrano, Auteur ; Hugo De Lasa, Auteur . - 2010 . - pp 6834–6844. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 15 (Août 2010) . - pp 6834–6844 Mots-clés : Catalytic Thermodynamics Gasification. Résumé : A thermodynamic equilibrium model based on evaluations involving C, H, and O element balances and various product species up to C6 hydrocarbons is reported in this study. This model establishes the effects of biomass composition, temperature, and steam on the various gas product molar fractions. On this basis, most significant parameters determining the chemical interconversions and distribution of chemical species are identified. On the basis of the proposed equilibrium model and using glucose as a model biomass species [C6H12O6], an optimum gasification temperature close to 800 °C and a steam/biomass ratio between 0.5 and 0.7 g/g is established. This study has the special value of comparing thermodynamic equilibrium predictions with experimental data obtained in a CREC riser simulator using a fluidizable Ni−Al2O3 catalyst. Results are relevant for scaled-up gasifiers. They show that for reaction times longer than 30 s chemical species are essentially equilibrated and that the proposed model does provide adequate description of various product fractions. Data obtained also demonstrate the shortcomings of equilibrium models for gasifiers with reaction times shorter than 10 s and the need for nonequilibrium models to describe gasifier performance at such conditions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901710n

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