Documents disponibles écrits par cet auteur

Coal coke gasification in a windowed solar chemical reactor for beam-down optics / Tatsuya Kodama in Transactions of the ASME. Journal of solar energy engineering, Vol. 132 N° 4 (Novembre 2010) 

Public ISBD [article]  in Transactions of the ASME. Journal of solar energy engineering > Vol. 132 N° 4 (Novembre 2010) . - pp. [041004/1-6] Titre : Coal coke gasification in a windowed solar chemical reactor for beam-down optics Type de document : texte imprimé Auteurs : Tatsuya Kodama, Auteur ; Nobuyuki Gokon, Auteur ; Shu-ich Enomoto, Auteur Année de publication : 2011 Article en page(s) : pp. [041004/1-6] Note générale : Energie Solaire Langues : Anglais (eng) Mots-clés : High-temperature  solar  heat  Solar  reactor  Fluidized  bed  Coal  Gasification  Solar  fuel Index. décimale : 621.47 Résumé : Solar thermochemical processes, such as solar gasification of coal, require the development of a high temperature solar reactor operating at temperatures above 1000°C. Direct solar energy absorption by reacting coal particles provides efficient heat transfer directly to the reaction site. In this work, a windowed reactor prototype designed for the beam-down optics was constructed at a laboratory scale and demonstrated for CO2 gasification of coal coke using concentrated visible light from a sun-simulator as the source of energy. Peak conversion of light energy to chemical fuel (CO) of 14% was obtained by irradiating a fluidized bed of 500–710 µm coal coke size fraction with a power input of about 1 kW and a CO2 flow-rate of 6.5 dm3 min−1 at normal conditions. DEWEY : 621.47 ISSN : 0199-6231 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO00013 [...] [article] Coal coke gasification in a windowed solar chemical reactor for beam-down optics [texte imprimé] / Tatsuya Kodama, Auteur ; Nobuyuki Gokon, Auteur ; Shu-ich Enomoto, Auteur . - 2011 . - pp. [041004/1-6]. Energie Solaire Langues : Anglais (eng) in Transactions of the ASME. Journal of solar energy engineering > Vol. 132 N° 4 (Novembre 2010) . - pp. [041004/1-6] Mots-clés : High-temperature  solar  heat  Solar  reactor  Fluidized  bed  Coal  Gasification  Solar  fuel Index. décimale : 621.47 Résumé : Solar thermochemical processes, such as solar gasification of coal, require the development of a high temperature solar reactor operating at temperatures above 1000°C. Direct solar energy absorption by reacting coal particles provides efficient heat transfer directly to the reaction site. In this work, a windowed reactor prototype designed for the beam-down optics was constructed at a laboratory scale and demonstrated for CO2 gasification of coal coke using concentrated visible light from a sun-simulator as the source of energy. Peak conversion of light energy to chemical fuel (CO) of 14% was obtained by irradiating a fluidized bed of 500–710 µm coal coke size fraction with a power input of about 1 kW and a CO2 flow-rate of 6.5 dm3 min−1 at normal conditions. DEWEY : 621.47 ISSN : 0199-6231 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO00013 [...]

Internally circulating fluidized bed reactor using m-ZrO2 supported NiFe2O4 particles for thermochemical two-step water splitting / Nobuyuki Gokon in Transactions of the ASME. Journal of solar energy engineering, Vol. 132 N° 2 (Mai 2010) 

Public ISBD [article]  in Transactions of the ASME. Journal of solar energy engineering > Vol. 132 N° 2 (Mai 2010) . - pp. [021102/1-10] Titre : Internally circulating fluidized bed reactor using m-ZrO2 supported NiFe2O4 particles for thermochemical two-step water splitting Type de document : texte imprimé Auteurs : Nobuyuki Gokon, Auteur ; Hiroki Yamamoto, Auteur ; Nobuyuki Kondo, Auteur Année de publication : 2011 Article en page(s) : pp. [021102/1-10] Note générale : Energie Solaire Langues : Anglais (eng) Mots-clés : Chemical  energy  conversion  Fluidised  beds  Quartz  Solar  energy  conversion Index. décimale : 621.47 Résumé : A windowed internally circulating fluidized bed reactor was tested using m-ZrO2-supported NiFe2O4 (NiFe2O4/m-ZrO2) particles as redox material for thermochemical two-step water splitting to produce hydrogen from water. The internally circulating fluidized bed of NiFe2O4/m-ZrO2 particles is directly heated by solar-simulated Xe light irradiation through a transparent quartz window mounted on top of the reactor. A sun simulator with three Xe lamps at laboratory scale has been newly installed in our laboratory for testing the fluidized bed reactor. The input power of incident Xe light can be scaled up to 2.6 kWth. Temperature distributions within the fluidized bed are measured under concentrated Xe light irradiation with an input power of 2.6 kWth. Hydrogen productivity and reactivity for the fluidized bed of NiFe2O4/m-ZrO2 particles are examined using two different reactors under the N2 flow rate and flow ratio, which yield a higher bed temperature. The feasibility of successive two-step water splitting using the fluidized bed reactor is examined by switching from N2 gas flow in the thermal reduction step to a steam/N2 gas mixture in the water decomposition step. It is confirmed that hydrogen production takes place in the single fluidized bed reactor by successive two-step water splitting. DEWEY : 621.47 ISSN : 0199-6231 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO00013200 [...] [article] Internally circulating fluidized bed reactor using m-ZrO2 supported NiFe2O4 particles for thermochemical two-step water splitting [texte imprimé] / Nobuyuki Gokon, Auteur ; Hiroki Yamamoto, Auteur ; Nobuyuki Kondo, Auteur . - 2011 . - pp. [021102/1-10]. Energie Solaire Langues : Anglais (eng) in Transactions of the ASME. Journal of solar energy engineering > Vol. 132 N° 2 (Mai 2010) . - pp. [021102/1-10] Mots-clés : Chemical  energy  conversion  Fluidised  beds  Quartz  Solar  energy  conversion Index. décimale : 621.47 Résumé : A windowed internally circulating fluidized bed reactor was tested using m-ZrO2-supported NiFe2O4 (NiFe2O4/m-ZrO2) particles as redox material for thermochemical two-step water splitting to produce hydrogen from water. The internally circulating fluidized bed of NiFe2O4/m-ZrO2 particles is directly heated by solar-simulated Xe light irradiation through a transparent quartz window mounted on top of the reactor. A sun simulator with three Xe lamps at laboratory scale has been newly installed in our laboratory for testing the fluidized bed reactor. The input power of incident Xe light can be scaled up to 2.6 kWth. Temperature distributions within the fluidized bed are measured under concentrated Xe light irradiation with an input power of 2.6 kWth. Hydrogen productivity and reactivity for the fluidized bed of NiFe2O4/m-ZrO2 particles are examined using two different reactors under the N2 flow rate and flow ratio, which yield a higher bed temperature. The feasibility of successive two-step water splitting using the fluidized bed reactor is examined by switching from N2 gas flow in the thermal reduction step to a steam/N2 gas mixture in the water decomposition step. It is confirmed that hydrogen production takes place in the single fluidized bed reactor by successive two-step water splitting. DEWEY : 621.47 ISSN : 0199-6231 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JSEEDO00013200 [...]