论文信息 - Storage and formation of pure hydrogen mediated by the redox of modified iron oxides

Storage and formation of pure hydrogen mediated by the redox of modified iron oxides

Abstract Methods for the storage and formation of pure hydrogen were demonstrated based on the reduction of magnetite with hydrogen (Fe3O4 + 4H2 → 3Fe + 4H2O), followed by oxidation of iron metal with water vapor (3Fe + 4H2O → Fe3O4 + 4H2). Iron oxides containing Cr cations produced hydrogen repeatedly through the redox reactions, whereas pure iron oxide was deactivated quickly for the redox due to sintering. Addition of Cu, Ni or Rh to iron oxides containing Cr cations enhanced the formation rate of hydrogen through the oxidation with water vapor at 573 K. These iron oxides can store and form hydrogen repeatedly through the redox. In addition, formation of hydrogen from synthesis gas or methane was demonstrated based on the reduction of iron oxides with synthesis gas or methane, followed by oxidation of iron metal with water vapor. The iron oxides containing both Cr and Ni species can produce hydrogen repeatedly through the redox reactions.

[1] S. Herreyre,et al. Effect of hydrogen on the morphology of carbon deposited from the catalytic disproportionation of CO , 1995 .

[2] E. Ruckenstein,et al. BINARY MgO-BASED SOLID SOLUTION CATALYSTS FOR METHANE CONVERSION TO SYNGAS , 2002 .

[3] R. Baker,et al. Catalytic growth of carbon filaments , 1989 .

[4] Peng Wang,et al. Autothermal reforming of CH4 over supported Ni catalysts prepared from Mg–Al hydrotalcite-like anionic clay , 2004 .

[5] S. Takenaka,et al. Formation of filamentous carbons over supported Fe catalysts through methane decomposition , 2004 .

[6] V. Blank,et al. Electron microscopy and electron energy loss spectroscopy studies of carbon fiber formation at Fe catalysts , 2002 .

[7] Kiyoshi Otsuka,et al. Chemical storage of hydrogen by modified iron oxides , 2003 .

[8] D. Lynch,et al. Catalytic disproportionation of CO in the absence of hydrogen: Encapsulating shell carbon formation , 1994 .

[9] S. Takenaka,et al. Storage and Supply of Pure Hydrogen from Methane Mediated by Modified Iron Oxides , 2004 .

[10] S. Takenaka,et al. Decomposition of methane over supported-Ni catalysts: effects of the supports on the catalytic lifetime , 2001 .

[11] Kiyoshi Otsuka,et al. Hydrogen storage and production by redox of iron oxide for polymer electrolyte fuel cell vehicles , 2003 .

[12] Kiyoshi Otsuka,et al. Production of hydrogen from methane without CO2-emission mediated by indium oxide and iron oxide , 2001 .