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Banagrass vs eucalyptus wood as feedstocks for metallurgical biocarbon production / Takuya Yoshida ; Scott Q. Turn ; Russell S. Yost in Industrial & engineering chemistry research, Vol. 47 n°24 (Décembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°24 (Décembre 2008) . - p. 9882–9888 Titre : Banagrass vs eucalyptus wood as feedstocks for metallurgical biocarbon production Type de document : texte imprimé Auteurs : Takuya Yoshida, Auteur ; Scott Q. Turn, Auteur ; Russell S. Yost, Auteur Année de publication : 2009 Article en page(s) : p. 9882–9888 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Charcoal--production Résumé : Excessive emissions of fossil CO2 are known to be a primary cause of global climate change. Emissions from the iron and steel-making industries account for 5−6% of global fossil CO2 emissions. Biocarbon (i.e., charcoal) could be used to replace the coal currently employed to smelt iron ore and thereby reduce fossil CO2 emissions. In Brazil, Eucalyptus wood charcoal is used to smelt iron ore, but there is interest in the use of charcoal produced from other biomass feedstocks. Banagrass, a variety of elephantgrass (Pennisetum purpureum, Schum.), which produces near-record amounts of biomass, is a promising biomass candidate for charcoal production in Brazil and elsewhere. In this paper we describe results of charcoal production from banagrass of different ages and states of demineralization. Mature banagrass provides the highest yields of biocarbon. In addition to its maturity, the structure of the feedstock strongly influences the fixed-carbon yield. Our results indicate that banagrass may be preferred to Eucalyptus wood as a promising feedstock for metallurgical biocarbon production. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801123a [article] Banagrass vs eucalyptus wood as feedstocks for metallurgical biocarbon production [texte imprimé] / Takuya Yoshida, Auteur ; Scott Q. Turn, Auteur ; Russell S. Yost, Auteur . - 2009 . - p. 9882–9888. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°24 (Décembre 2008) . - p. 9882–9888 Mots-clés : Charcoal--production Résumé : Excessive emissions of fossil CO2 are known to be a primary cause of global climate change. Emissions from the iron and steel-making industries account for 5−6% of global fossil CO2 emissions. Biocarbon (i.e., charcoal) could be used to replace the coal currently employed to smelt iron ore and thereby reduce fossil CO2 emissions. In Brazil, Eucalyptus wood charcoal is used to smelt iron ore, but there is interest in the use of charcoal produced from other biomass feedstocks. Banagrass, a variety of elephantgrass (Pennisetum purpureum, Schum.), which produces near-record amounts of biomass, is a promising biomass candidate for charcoal production in Brazil and elsewhere. In this paper we describe results of charcoal production from banagrass of different ages and states of demineralization. Mature banagrass provides the highest yields of biocarbon. In addition to its maturity, the structure of the feedstock strongly influences the fixed-carbon yield. Our results indicate that banagrass may be preferred to Eucalyptus wood as a promising feedstock for metallurgical biocarbon production. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801123a

Hydrothermal pretreatment of rubber wood for the saccharification process / Phacharakamol Petchpradab in Industrial & engineering chemistry research, Vol. 48 N° 9 (Mai 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 9 (Mai 2009) . - pp. 4587–4591 Titre : Hydrothermal pretreatment of rubber wood for the saccharification process Type de document : texte imprimé Auteurs : Phacharakamol Petchpradab, Auteur ; Takuya Yoshida, Auteur ; Tawatchai Charinpanitkul, Auteur Année de publication : 2009 Article en page(s) : pp. 4587–4591 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Rubber  wood  Hydrothermal  pretreatmentEnzymatic  hydrolysis Résumé : Rubber wood (Hevea brasiliensis) was employed as a biomass raw material for the hydrothermal pretreatment process for the enzymatic hydrolysis. Pulverized rubber wood was treated at 130−280 °C using an autoclave with inner volume of 96 cm3. The glucose content of the treated liquid product was measured. The solid product was analyzed for cellulose content and further treated with cellulase. The product glucose yield indicated the effectiveness of the hydrothermal pretreatment. A reaction network model for the hydrothermal pretreatment was proposed and applied successfully. The reaction parameters were determined. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801314h [article] Hydrothermal pretreatment of rubber wood for the saccharification process [texte imprimé] / Phacharakamol Petchpradab, Auteur ; Takuya Yoshida, Auteur ; Tawatchai Charinpanitkul, Auteur . - 2009 . - pp. 4587–4591. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 9 (Mai 2009) . - pp. 4587–4591 Mots-clés : Rubber  wood  Hydrothermal  pretreatmentEnzymatic  hydrolysis Résumé : Rubber wood (Hevea brasiliensis) was employed as a biomass raw material for the hydrothermal pretreatment process for the enzymatic hydrolysis. Pulverized rubber wood was treated at 130−280 °C using an autoclave with inner volume of 96 cm3. The glucose content of the treated liquid product was measured. The solid product was analyzed for cellulose content and further treated with cellulase. The product glucose yield indicated the effectiveness of the hydrothermal pretreatment. A reaction network model for the hydrothermal pretreatment was proposed and applied successfully. The reaction parameters were determined. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801314h

Reactor development for supercritical water gasification of 4.9 wt% glucose solution at 673 K by using computational fluid dynamics / Takuya Yoshida in Industrial & engineering chemistry research, Vol. 48 N° 18 (Septembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8381–8386 Titre : Reactor development for supercritical water gasification of 4.9 wt% glucose solution at 673 K by using computational fluid dynamics Type de document : texte imprimé Auteurs : Takuya Yoshida, Auteur ; Yukihiko Matsumura, Auteur Année de publication : 2010 Article en page(s) : pp. 8381–8386 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Supercritical  water  gasification  Computational  fluid  dynamics Résumé : Supercritical water gasification is suitable for gasifying biomass with high moisture content. Although biomass material can be easily decomposed in supercritical water, it can polymerize to form char products, which may result in serious problems such as plugging of the reactor. To depress char formation during gasification of biomass material in supercritical water, a combination of reactors was proposed in our previous study. In this study, we have improved the system by means of computational fluid dynamics (CFD) and verified it through experiments. With the improved reactor, 4.9 wt% glucose solution was successfully gasified at 673 K and 25.4 MPa; the carbon gasification efficiency was greater than 0.94. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9002188 [article] Reactor development for supercritical water gasification of 4.9 wt% glucose solution at 673 K by using computational fluid dynamics [texte imprimé] / Takuya Yoshida, Auteur ; Yukihiko Matsumura, Auteur . - 2010 . - pp. 8381–8386. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8381–8386 Mots-clés : Supercritical  water  gasification  Computational  fluid  dynamics Résumé : Supercritical water gasification is suitable for gasifying biomass with high moisture content. Although biomass material can be easily decomposed in supercritical water, it can polymerize to form char products, which may result in serious problems such as plugging of the reactor. To depress char formation during gasification of biomass material in supercritical water, a combination of reactors was proposed in our previous study. In this study, we have improved the system by means of computational fluid dynamics (CFD) and verified it through experiments. With the improved reactor, 4.9 wt% glucose solution was successfully gasified at 673 K and 25.4 MPa; the carbon gasification efficiency was greater than 0.94. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9002188