2007
DOI: 10.1590/s1517-70762007000100005
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Abstract: Com o desenvolvimento das células a combustível, há uma expectativa de crescimento da demanda por hidrogênio. A reforma a vapor de etanol é mais atrativa que outros processos relacionados para produzir hidrogênio de alta pureza, por apresentar diversas vantagens, tais como a utilização de fontes de energia renovável e facilidade de manuseio e estocagem do etanol. Alguns dos catalisadores usados nesse processo são níquel suportado em óxidos de lantânio, assim como níquel suportado em óxido de magnésio, que apre… Show more

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Cited by 2 publications
(2 citation statements)
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“…Solids showed low specific area values from 2.0 to 6.0 m²g -1 (Table I), which are typical of niobium oxide [27] and cobalt oxide [4] obtained at high temperatures. Commonly, alkaline earth metals do not contribute to area increase [24], although modifiers addition slightly increased the specific area and decreased cobalt niobate mean pore diameter (CoNb). This effect was more pronounced in samples containing strontium (CoSrNb) which, as can be seen in all characterization results, was the dopant which changed CoNbOx properties more effectively.…”
Section: Cocanb Cosrnbmentioning
confidence: 99%
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“…Solids showed low specific area values from 2.0 to 6.0 m²g -1 (Table I), which are typical of niobium oxide [27] and cobalt oxide [4] obtained at high temperatures. Commonly, alkaline earth metals do not contribute to area increase [24], although modifiers addition slightly increased the specific area and decreased cobalt niobate mean pore diameter (CoNb). This effect was more pronounced in samples containing strontium (CoSrNb) which, as can be seen in all characterization results, was the dopant which changed CoNbOx properties more effectively.…”
Section: Cocanb Cosrnbmentioning
confidence: 99%
“…For Ni/Al 2 O 3 catalysts, a decrease in acidity due to alkaline earth metal oxides addition was directly related to coke deposition decrease on the surface [23]. However, other catalytic properties may change with alkaline metal addition, such as metallic dispersion, active phase species reduction degree on the surface and its interaction with the support, which also affects their activity and selectivity [1,10,24]. Studies show that the catalyst behavior can be significantly altered depending on the nature of the alkaline earth metal used as a dopant [25].…”
Section: Introductionmentioning
confidence: 99%