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Now showing items 21-30 of 44
Nanopartículas de Co suportadas em SiO2: síntese, caracterização e propriedades catalíticas para a reforma a vapor do etanol
(Universidade Federal de São Carlos, 2007-03-16)
Colloidal Co Nanoparticles (Co-NPs) were used to prepare supported Co catalysts. The Co-
NPs were obtained by thermal decomposition of the precursor Co2(CO)8 in the presence of
oleic acid and trioctylphosphine oxide ...
Efeito das condições de preparação da [CTA+]-SiMCM-41 na atividade da transesterificação
(Universidade Federal de São Carlos, 2010-02-26)
The hybrid [CTA+]-SiMCM-41 mesoporous material (where CTA+ is the cetyltrimethylammonium cation) was employed as synthesized in the transesterification reaction between ethyl acetate and methanol. This is a model reaction ...
Catalisadores bimetálicos Pt-Fe/CeO2 para a reação de oxidação preferencial do CO
(Universidade Federal de São Carlos, 2010-03-31)
The objective of this work is to study the preferential oxidation (PROX) of carbon monoxide in H2-rich feed streams over Pt-Fe/CeO2 catalysts in a feed gas composed of 3% CO, 1.5% O2, 80% H2, and N2 (for balance). The ...
Catalisadores derivados de óxidos do tipo perovskita LaMO3, LaMFeO3 e LaMO3/γ-Al2O3 (M = Co, Ni ou Fe) aplicados à reforma a vapor de etanol
(Universidade Federal de São Carlos, 2014-07-30)
The hydrogen production has been extensively studied as a clean and powerful energy source, indicating that in the future hydrogen will became a key component for the global energy production, since burning fossil fuels, ...
Catalisadores de Fe2O3, NiO e Fe2O3 - NiO Suportados in situ em Ce0,5Zr0,5O2 e Ce0,2Zr0,8O2 – Avaliação na Redução de NO com CO
(Universidade Federal de São Carlos, 2014-03-28)
The increasing use of fossil fuels in combustion enginees and power generation plants
has caused a large increase in the emission of sulfur oxides, nitrogen oxides (NOx)
and carbon monoxide into the atmosphere which ...
Hidrotalcitas multimetálicas para produção de gás de síntese a partir do biogás
(Universidade Federal de São Carlos, 2015-03-18)
In this work, catalysts derived from hydrotalcites were employed in Direct Reforming of Biogas, once they feature the necessary basicity to allow and improve carbon removal during reforming. As a differential study, the ...
Catalisadores contendo espécies V2O5 ou VO2+ : atividade e seletividade na redução de NO com amônia
(Universidade Federal de São Carlos, 2009-08-03)
The selective catalytic reduction of NOx with ammonia is the best technology available today to carry out the abatement of nitrogen oxide emissions in industrial gas effluents. Currently, vanadia-titania catalysts promoted ...
Formação de mesoporos na síntese de zeólitas ZSM-5 via nanomoldagem avaliação no craqueamento de n-decano
(Universidade Federal de São Carlos, 2008-04-04)
The use of zeolites in the cracking of hydrocarbons is limited because the molecules higher than 0.74 nm do not diffuse in their micropores. In the other hand, molecular sieves as MCM-41, MCM-48 ou SBA-15, whose diameters ...
Sobre a estabilidade de catalisadores de cobalto suportados durante a reforma do etanol
(Universidade Federal de São Carlos, 2012-06-11)
Cobalt-based catalysts supported on γ-alumina and magnesium aluminate modified with lanthanum and cerium have been applied to various conditions of reforming of ethanol. The initial challenge was to control the rate ...
Oxidação preferencial de CO em catalisadores à base de ouro : estudo do efeito do suporte e do método de síntese do catalisador
(Universidade Federal de São Carlos, 2016-03-29)
The CO preferential oxidation reaction (PROX) is used in the purification of hydrogen
streams for various applications. Since the discovery of improved catalytic properties
of gold particles, at nanometer range, in the ...