Computational fluid dynamic modeling of a chemical vapor synthesis process for aluminum nanopowder as a hydrogen storage precursor / H. Y. Sohn in Chemical engineering journal, Vol. 156 N° 1 (Janvier 2010)  

Public ISBD [article]  inChemical engineering journal > Vol. 156 N° 1 (Janvier 2010) . - pp. 215-225 Titre : Computational fluid dynamic modeling of a chemical vapor synthesis process for aluminum nanopowder as a hydrogen storage precursor Type de document : texte imprimé Auteurs : H. Y. Sohn, Auteur ; Silvia Perez-Fontesa, Auteur ; Jin Won Choi, Auteur Année de publication : 2010 Article en page(s) : pp. 215-225 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Computational fluid dynamics modeling Chemical vapor synthesis Nucleation and growth Aluminum Nanopowder Hydrogen storage Index. décimale : 660 Résumé : A chemical vapor synthesis (CVS) process for synthesizing nano-sized aluminum powder as a precursor for various hydrogen storage materials was simulated by the use of computational fluid dynamic modeling. The fluid flow, heat transfer and chemical reaction phenomena taking place inside the reactor were analyzed together with particle formation and growth in the CVS process. The temperature, velocity and particle size distribution fields inside the reactor were computed. Chemical reaction rate and population balance model were used to calculate the particle formation and growth. The particle size computed by the program was compared with the experimental data, and the calculated average size of the final product particles was consistent with those obtained in the experimental work. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4XHVH7T-5&_user=6 [...] [article] Computational fluid dynamic modeling of a chemical vapor synthesis process for aluminum nanopowder as a hydrogen storage precursor [texte imprimé] / H. Y. Sohn, Auteur ; Silvia Perez-Fontesa, Auteur ; Jin Won Choi, Auteur . - 2010 . - pp. 215-225. Génie Chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 156 N° 1 (Janvier 2010) . - pp. 215-225 Mots-clés : Computational fluid dynamics modeling Chemical vapor synthesis Nucleation and growth Aluminum Nanopowder Hydrogen storage Index. décimale : 660 Résumé : A chemical vapor synthesis (CVS) process for synthesizing nano-sized aluminum powder as a precursor for various hydrogen storage materials was simulated by the use of computational fluid dynamic modeling. The fluid flow, heat transfer and chemical reaction phenomena taking place inside the reactor were analyzed together with particle formation and growth in the CVS process. The temperature, velocity and particle size distribution fields inside the reactor were computed. Chemical reaction rate and population balance model were used to calculate the particle formation and growth. The particle size computed by the program was compared with the experimental data, and the calculated average size of the final product particles was consistent with those obtained in the experimental work. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4XHVH7T-5&_user=6 [...]

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Phosphorus distribution between liquid iron and magnesia - saturated slag in H2 / H2O atmosphere relevant to a novel ironmaking technology / M. Y. Mohassab-Ahmed in Industrial & engineering chemistry research, Vol. 51 N° 20 (Mai 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 20 (Mai 2012) . - pp. 7028-7034 Titre : Phosphorus distribution between liquid iron and magnesia - saturated slag in H2 / H2O atmosphere relevant to a novel ironmaking technology Type de document : texte imprimé Auteurs : M. Y. Mohassab-Ahmed, Auteur ; H. Y. Sohn, Auteur ; Hang Goo Kim, Auteur Année de publication : 2012 Article en page(s) : pp. 7028-7034 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Slag Résumé : As a part of a research project that aims to develop a novel ironmaking process using hydrogen flash reduction of iron ore concentrate, experimental determination of the phosphorus distribution ratio (Lp) between CaO―MgO(saturated)―SiO2― Al2O3―FeO slag and molten iron was determined in the temperature range 1550―1650 °C. Oxygen partial pressure was controlled by H2/H2O equilibrium in the range of 10―10―10―8 atm. Under these conditions applicable to the proposed process, Lp was 9—21. The proposed process is expected to produce iron with phosphorus content 7—14 times lower than in the iron produced by the blast furnace, considering the relative amounts of phosphorus inputs in the two processes and the low P content in the slag under the blast furnace conditions. This will decrease the need for dephosphorization in the steelmaking stage. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25925045 [article] Phosphorus distribution between liquid iron and magnesia - saturated slag in H2 / H2O atmosphere relevant to a novel ironmaking technology [texte imprimé] / M. Y. Mohassab-Ahmed, Auteur ; H. Y. Sohn, Auteur ; Hang Goo Kim, Auteur . - 2012 . - pp. 7028-7034. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 20 (Mai 2012) . - pp. 7028-7034 Mots-clés : Slag Résumé : As a part of a research project that aims to develop a novel ironmaking process using hydrogen flash reduction of iron ore concentrate, experimental determination of the phosphorus distribution ratio (Lp) between CaO―MgO(saturated)―SiO2― Al2O3―FeO slag and molten iron was determined in the temperature range 1550―1650 °C. Oxygen partial pressure was controlled by H2/H2O equilibrium in the range of 10―10―10―8 atm. Under these conditions applicable to the proposed process, Lp was 9—21. The proposed process is expected to produce iron with phosphorus content 7—14 times lower than in the iron produced by the blast furnace, considering the relative amounts of phosphorus inputs in the two processes and the low P content in the slag under the blast furnace conditions. This will decrease the need for dephosphorization in the steelmaking stage. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25925045

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Sulfur distribution between liquid iron and magnesia - saturated slag in H2 / H2O atmosphere relevant to a novel green ironmaking technolog / M. Y. Mohassab-Ahmed in Industrial & engineering chemistry research, Vol. 51 N° 9 (Mars 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3639–3645 Titre : Sulfur distribution between liquid iron and magnesia - saturated slag in H2 / H2O atmosphere relevant to a novel green ironmaking technolog Type de document : texte imprimé Auteurs : M. Y. Mohassab-Ahmed, Auteur ; H. Y. Sohn, Auteur ; Hang Goo Kim, Auteur Année de publication : 2012 Article en page(s) : pp. 3639–3645 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Slag Résumé : As an integral part of a research project which aimed to develop a novel green ironmaking process, an experimental determination of the sulfur distribution ratios, LS, between molten iron and CaO–MgO(saturated)–SiO2–Al2O3–FeO slag was carried out in the temperature range of 1550–1650 °C. Oxygen partial pressure was controlled by H2/H2O equilibrium in the range of 10–10–10–8 atm. Under these conditions applicable to the proposed process, LS was 34 times smaller than that under the conditions of the blast furnace. Considering the relative amounts of sulfur inputs in the two processes as well as other factors, however, the proposed process is expected to produce iron with a lower sulfur content, which will decrease the need for desulfurization in the steelmaking stage. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25595791 [article] Sulfur distribution between liquid iron and magnesia - saturated slag in H2 / H2O atmosphere relevant to a novel green ironmaking technolog [texte imprimé] / M. Y. Mohassab-Ahmed, Auteur ; H. Y. Sohn, Auteur ; Hang Goo Kim, Auteur . - 2012 . - pp. 3639–3645. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3639–3645 Mots-clés : Slag Résumé : As an integral part of a research project which aimed to develop a novel green ironmaking process, an experimental determination of the sulfur distribution ratios, LS, between molten iron and CaO–MgO(saturated)–SiO2–Al2O3–FeO slag was carried out in the temperature range of 1550–1650 °C. Oxygen partial pressure was controlled by H2/H2O equilibrium in the range of 10–10–10–8 atm. Under these conditions applicable to the proposed process, LS was 34 times smaller than that under the conditions of the blast furnace. Considering the relative amounts of sulfur inputs in the two processes as well as other factors, however, the proposed process is expected to produce iron with a lower sulfur content, which will decrease the need for desulfurization in the steelmaking stage. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25595791

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