NDLI: Synthesis of mesoporous bimetallic Ni–Cu catalysts supported over ZrO<sub>2</sub> by a homogenous urea coprecipitation method for catalytic steam reforming of ethanol

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Catalysis Science & Technology Vol - 3 Issue - 3

Catalysis Science & Technology Vol - 3 Issue - 2

Catalysis Science & Technology Vol -2

Catalysis Science & Technology Vol -1

Synthesis of mesoporous bimetallic Ni–Cu catalysts supported over ZrO₂ by a homogenous urea coprecipitation method for catalytic steam reforming of ethanol

Content Provider	Royal Society of Chemistry (RSC)
Author	Roy, Prasun Kumar Bhatt, Arti Rajagopal, Chitra Sharma, Pankaj Kumar Saxena, Navin
Copyright Year	2013
Abstract	The synthesis of mesoporous Ni–Cu bimetallic oxides supported over ZrO2 by the homogenous urea co-precipitation technique and its catalytic efficacy towards steam reforming of ethanol has been explored. The amount of NiO was kept constant and that of CuO was varied to obtain bimetallic supported oxides which were characterized using different techniques like N2 adsorption–desorption measurements, XRD, H2-TPR, ICP-OES, TGA and SEM analyses. The results were compared with those obtained by alkali coprecipitation. The oxides prepared by urea coprecipitation were found to exhibit a type IV isotherm and a characteristic H2 type hysteresis, while those prepared by alkali precipitation were found to be nonporous. The studies reveal that this facile route of urea-coprecipitation can generate mesoporosity in zirconia based compositions and because of its simplicity, it holds enormous potential as a soft-templating technique for large scale preparation. The surface area increased on introduction of Cu, exhibits maxima at 3% w/w CuO, and subsequently decrease at higher loadings. The reducibility and the metal support interactions were altered in the presence of Cu, which reflected on its improved catalytic activity towards steam reforming of ethanol. The introduction of Cu species enhances the water gas shift reaction and favors acetaldehyde decomposition and reforming over the ethanol dehydrogenation reaction, as indicated by the reduced levels of acetaldehyde in the product stream. On increasing the reforming temperature, H2 and CO2 selectivity and ethanol conversion increased significantly. Bimetallic oxides containing 3% w/w CuO were found to be most effective towards ethanol steam reforming, exhibiting complete ethanol conversion and 84% H2 selectivity at 600 °C, indicating their potential to be used as stable ESR catalysts.
Starting Page	1017
Ending Page	1026
Page Count	10
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	3
Issue Number	4
Journal	Catalysis Science & Technology
DOI	10.1039/c2cy20563g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Copper(II) oxide Ethanol Water-gas shift reaction Inductively coupled plasma atomic emission spectroscopy Alkali metal Acetaldehyde X-ray crystallography Mesoporous material Urea Cu Dehydrogenation Steam reforming Zirconium dioxide Coprecipitation Hysteresis
Content Type	Text
Resource Type	Article
Subject	Catalysis

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