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Pilot plant scale study of the influence of the operating conditions in the production of carbon nanofibers / Vicente Jiménez 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. 8407–8417 Titre : Pilot plant scale study of the influence of the operating conditions in the production of carbon nanofibers Type de document : texte imprimé Auteurs : Vicente Jiménez, Auteur ; Antonio Nieto-Márquez, Auteur ; José Antonio Díaz, Auteur Année de publication : 2010 Article en page(s) : pp. 8407–8417 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Carbon  nanofibers  Pilot  scale  Fixed-bed  reactor Résumé : In this paper, the optimization of typical reaction variables for a pilot scale synthesis of carbon nanofibers (CNFs) using a fixed-bed reactor has been carried out to provide a more economically viable large scale production of these materials. Using a Ni/SiO2 catalyst (10 wt % Ni) and ethylene as the carbon source, the optimum value of temperature, space velocity, and H2/C2H4 ratio (v/v) in terms of carbon yield was 600 °C, 10000 h−1, and 1:4, respectively. The modification of these variables caused a significant change in the type and amount of solid carbon recovered. Carbon product characterization demonstrated that CNFs with mesoporous character, large external surface, and good thermal stability and crystallinity were obtained. Finally, results demonstrated a successful scale-up by a factor of 45 in the pilot plant scale; a CNFs yield of 106 gCNFs/gcatalytic metal could be obtained at optimal conditions during a reaction time of 60 min at optimal conditions in the pilot plant scale. For the same reaction conditions, only 80 gCNFs/gcatalytic metal were obtained in the laboratory reactor. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9005386 [article] Pilot plant scale study of the influence of the operating conditions in the production of carbon nanofibers [texte imprimé] / Vicente Jiménez, Auteur ; Antonio Nieto-Márquez, Auteur ; José Antonio Díaz, Auteur . - 2010 . - pp. 8407–8417. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 18 (Septembre 2009) . - pp. 8407–8417 Mots-clés : Carbon  nanofibers  Pilot  scale  Fixed-bed  reactor Résumé : In this paper, the optimization of typical reaction variables for a pilot scale synthesis of carbon nanofibers (CNFs) using a fixed-bed reactor has been carried out to provide a more economically viable large scale production of these materials. Using a Ni/SiO2 catalyst (10 wt % Ni) and ethylene as the carbon source, the optimum value of temperature, space velocity, and H2/C2H4 ratio (v/v) in terms of carbon yield was 600 °C, 10000 h−1, and 1:4, respectively. The modification of these variables caused a significant change in the type and amount of solid carbon recovered. Carbon product characterization demonstrated that CNFs with mesoporous character, large external surface, and good thermal stability and crystallinity were obtained. Finally, results demonstrated a successful scale-up by a factor of 45 in the pilot plant scale; a CNFs yield of 106 gCNFs/gcatalytic metal could be obtained at optimal conditions during a reaction time of 60 min at optimal conditions in the pilot plant scale. For the same reaction conditions, only 80 gCNFs/gcatalytic metal were obtained in the laboratory reactor. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9005386