Hydrogen from bioethanol: Catalytic honeycombs loaded with Co-Fe/ZnOfor small-scale energy applications

2011 ◽  
Vol 1326 ◽  
Author(s):  
Cristian Ledesma ◽  
Maria Roig ◽  
Jordi Llorca
Keyword(s):  
Steam Reforming ◽  
Molar Ratio ◽  
Small Scale ◽  
Reaction Products ◽  
Energy Applications ◽  
Steam Reforming Of Ethanol ◽  
One Step ◽  
Ethanol Steam ◽  
Urea Method

ABSTRACTCatalytic monoliths loaded with ZnO-supported Co-Fe catalysts were prepared in one step by the in situ urea method and tested in the ethanol steam reforming reaction to produce hydrogen. The most active and selective formulation was attained with a Fe/Co molar ratio between 0.05 and 0.1, which showed negligible amounts of methane among the reaction products, thus offering an active and selective material for the low-temperature steam reforming of ethanol for small-scale energy applications.

scholarly journals SOL-GEL DERIVED Co AND Ni BASED CATALYSTS: APPLICATION FOR STEAM REFORMING OF ETHANOL

2010 ◽  
Vol 8 (1) ◽  
pp. 47-53
Author(s):  
Haryo Satriya Oktaviano ◽  
Wega Trisunaryanti
Keyword(s):  
Steam Reforming ◽  
Catalyst Activity ◽  
Sol Gel ◽  
Lewis Acid Site ◽  
Morphological Properties ◽  
Molar Ratio ◽  
Gel Method ◽  
Sol Gel Method ◽  
Steam Reforming Of Ethanol ◽  
Ethanol Steam

Cobalt and nickel based catalysts for ethanol steam reforming have been prepared. Preparation of Na-Ni-Mo/C, Na-Co-Mo/C, K-Ni-Mo/C and K-Co-Mo/C have been carried out using sol-gel method by applying citric acid as complexion agent and source for support formation. Prepared catalyst via sol gel showed tailored morphological properties signed by tailored pore size distribution. The acidity of catalyst showed that all catalysts contain only Lewis acid site. The catalyst activity test was conducted by using semi flow method with molar ratio of ethanol : water = 0.33 at 400 oC   Keywords: sol-gel method, steam reforming, ethanol

Efficient and stable oxidative steam reforming of ethanol for hydrogen production: Effect of in situ dispersion of Ir over Ir/La2O3

2010 ◽  
Vol 269 (2) ◽  
pp. 281-290 ◽  
Author(s):  
Hongqing Chen ◽  
Hao Yu ◽  
Feng Peng ◽  
Hongjuan Wang ◽  
Jian Yang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Steam Reforming ◽  
Production Effect ◽  
Steam Reforming Of Ethanol

In situ magnetic characterisation of supported cobalt catalysts under steam-reforming of ethanol

2003 ◽  
Vol 243 (2) ◽  
pp. 261-269 ◽  
Author(s):  
Jordi Llorca ◽  
Jean-Alain Dalmon ◽  
Pilar Ramı́rez de la Piscina ◽  
Narcı́s Homs
Keyword(s):  
Steam Reforming ◽  
Cobalt Catalysts ◽  
Steam Reforming Of Ethanol ◽  
Supported Cobalt Catalysts

In situ IR spectroscopy study of ethanol steam reforming in the presence of Pt–Ru/DND nanocatalysts

2017 ◽  
Vol 12 (5-6) ◽  
pp. 315-325 ◽  
Author(s):  
G. N. Bondarenko ◽  
M. M. Ermilova ◽  
M. N. Efimov ◽  
L. M. Zemtsov ◽  
G. P. Karpacheva ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Steam Reforming ◽  
Ethanol Steam Reforming ◽  
Spectroscopy Study ◽  
In Situ Ir ◽  
Ethanol Steam ◽  
In Situ Ir Spectroscopy

Hydrogen Production from Ethanol Steam Reforming over Ni-Cu/ZnO Catalyst

2011 ◽  
Vol 236-238 ◽  
pp. 1067-1072
Author(s):  
Li Ping Liu ◽  
Xiao Jian Ma ◽  
Peng Zhang ◽  
Ya Nan Liu
Keyword(s):  
Hydrogen Production ◽  
Steam Reforming ◽  
Fixed Bed ◽  
Surface Characteristics ◽  
Catalytic Performance ◽  
Fixed Bed Reactor ◽  
Molar Ratio ◽  
Ethanol Steam Reforming ◽  
Hydrogen Yield ◽  
Ethanol Steam

Hydrogen production by ethanol steam reforming over Ni-Cu/ZnO catalyst in the temperatures range of 250-550°C was studied on a fixed bed reactor. The effects of reaction temperature and water/ethanol molar ratio on hydrogen production were investigated. The structure and surface characteristics of the catalyst were measured by scanning electron microscopy (SEM), X-ray diffraction (XRD) and differential thermal analyzer (TG-DSC). The results show that the Ni-Cu/ZnO catalyst has good catalytic performance with higher hydrogen yield of 4.87molH2/molEtOH reacted. A comparison of hydrogen production from ethanol steam reforming over Ni-Cu/ZnO catalyst with over a commercial catalyst was made in this paper.

Effect of the water–ethanol molar ratio in the ethanol steam reforming reaction over a Co/CeO2/MgAl2O4 catalyst

2015 ◽  
Vol 115 (2) ◽  
pp. 535-546 ◽  
Author(s):  
Mariana N. Barroso ◽  
Manuel F. Gomez ◽  
Luis A. Arrúa ◽  
Maria C. Abello
Keyword(s):  
Steam Reforming ◽  
Molar Ratio ◽  
Ethanol Steam Reforming ◽  
Ethanol Steam

scholarly journals Influence of the ZrO2 Crystalline Phases on the Nature of Active Sites in PdCu/ZrO2 Catalysts for the Methanol Steam Reforming Reaction—An In Situ Spectroscopic Study

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1005
Author(s):  
Daniel Ruano ◽  
Beatriz M. Pabón ◽  
Càtia Azenha ◽  
Cecilia Mateos-Pedrero ◽  
Adélio Mendes ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Active Sites ◽  
Surface Composition ◽  
Ambient Pressure ◽  
Chemical Properties ◽  
Spectroscopic Studies ◽  
Metal Species ◽  
Methanol Steam Reforming ◽  
Reaction Products

In this work, the electronic properties of the metal sites in cubic and monoclinic ZrO2 supported Pd and PdCu catalysts have been investigated using CO as probe molecule in in-situ IR studies, and the surface composition of the outermost layers has been studied by APXPS (Ambient Pressure X-ray Photoemission Spectroscopy). The reaction products were followed by mass spectrometry, making it possible to relate the chemical properties of the catalysts under reaction conditions with their selectivity. Combining these techniques, it has been shown that the structure of the support (monoclinic or cubic ZrO2) affects the metal dispersion, mobility, and reorganization of metal sites under methanol steam reforming (MSR) conditions, influencing the oxidation state of surface metal species, with important consequences in the catalytic activity. Correlating the mass spectra of the reaction products with these spectroscopic studies, it was possible to conclude that electropositive metal species play an imperative role for high CO2 and H2 selectivity in the MSR reaction (less CO formation).

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