Catalytic Reforming
Mostrando 1-12 de 36 artigos, teses e dissertações.
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1. CHARACTERIZATION AND BEHAVIOUR OF PT CATALYSTS SUPPORTED ON BASIC MATERIALS IN DRY REFORMING OF METHANE
ABSTRACT Different basic materials, such as K-L zeolite, K-Al2O3, K-Mg/Al mixed oxide and MgO, were used as supports of Pt-catalysts for the dry reforming of methane (DR) reaction. The effects of the distribution of basic strength in the support on the metal-support properties and catalyst performance were evaluated. The density of strong and the total basic
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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2. Nickel-based Catalyst Precursor Prepared Via Microwave-induced Combustion Method: Thermodynamics of Synthesis and Performance in Dry Reforming of CH4
Nickel-based catalyst precursor for dry reforming of methane was successfully prepared by a self-combustion method. Three different amino acids: urea, glycine and citric acid were tested as fuels in the redox reaction with metal nitrates. For each fuel, a thermodynamic modeling of the combustion reaction was performed. The samples were characterized by X-ray
Mat. Res.. Publicado em: 25/08/2015
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3. METHANE DRY REFORMING OVER Ni SUPPORTED ON PINE SAWDUST ACTIVATED CARBON: EFFECTS OF SUPPORT SURFACE PROPERTIES AND METAL LOADING
The influence of metal loading and support surface functional groups (SFG) on methane dry reforming (MDR) over Ni catalysts supported on pine-sawdust derived activated carbon were studied. Using pine sawdust as the catalyst support precursor, the smallest variety and lowest concentration of SFG led to best Ni dispersion and highest catalytic activity, which
Quím. Nova. Publicado em: 2015-05
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4. Advances in ethanol reforming for the production of hydrogen
Catalytic steam reforming of ethanol (SRE) is a promising route for the production of renewable hydrogen (H2). This article reviews the influence of doping supported-catalysts used in SRE on the conversion of ethanol, selectivity for H2, and stability during long reaction periods. In addition, promising new technologies such as membrane reactors and electroc
Quím. Nova. Publicado em: 2014-06
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5. Remoção do alcatrão de correntes de gaseificação de biomassa: processos e catalisadores
Biomass gasification is a technology that has attracted great interest in synthesis of biofuels and oxo alcohols. However, this gas contains several contaminants, including tar, which need to be removed. Removal of tar is particularly critical because it can lead to operational problems. This review discusses the major pathways to remove tar, with a particul
Quím. Nova. Publicado em: 2014
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6. Estudo de catalisadores de níquel suportados em cinza de casca de arroz na reforma de metano com dióxido de carbono visando a produção de hidrogênio e gás de síntese
Rice husk ash (RHA) is used as a silica source for several purposes, among them to obtain metal catalysts, as was done in this work. The catalysts were characterized by chemisorption, physisorption, thermal analyses (TG, DSC), X-ray diffraction, X-ray fluorescence, temperature-programmed reduction and scanning electron microscopy. The catalysts synthesized w
Quím. Nova. Publicado em: 2014
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7. Ce - promoted catalyst from hydrotalcites for CO2 reforming of methane: calcination temperature effect
Ce-promoted Ni-catalysts from hydrotalcites were obtained. The effect of calcination temperature on the chemical and physical properties of the catalysts was studied. Several techniques were used to determine the chemical and physical characteristics of oxides. The apparent activation energies of reduction were determined. Catalytic experiments at 48 L g-1h-
Química Nova. Publicado em: 2012
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8. Efeito da adição de lantânio em catalisadores de Ni/ZrO2 aplicados na reação de reforma a vapor de etanol
The catalytic performance of Ni/ZrO2 catalysts loaded with different lanthanum content for steam reforming of ethanol was investigated. Catalysts were characterized by BET surface area, X-ray diffraction, UV-vis spectroscopy, temperature programmed reduction, and X-ray absorption fine structure techniques. Results showed that lanthanum addition led to an inc
Química Nova. Publicado em: 2012
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9. Catalisadores à base de platina frente a correntes de H2 contendo acetaldeído geradas via reforma do etanol / Platinum-based catalystic in the face of current H2 containing acthaldehyde generated via reforming of ethanol
Due to the greenhouse effect, hydrogen production from bioethanol reforming is a very important subject in heterogeneous catalysis research. Pt based catalysts are employed in H2 purification processes and also as electrocatalysts of PEM (Proton Exchange Membrane) fuel cells. Hydrogen obtained from ethanol reforming may contain acetaldehyde and small amounts
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/05/2011
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10. Methanol steam reforming over Cu/CeO2 catalysts: influence of zinc addition
Methanol steam reforming reaction was studied over Cu(5 wt.%)/CeO2 with and without the presence of Zn. The Zn addition decreased the Cu+2 reducibility and increased the oxygen mobility of ceria. The main products were CO2 and H2 with small amount of CO. Selectivity to CO decreased with the Zn addition and it was lower at lower reaction temperatures and lowe
Química Nova. Publicado em: 2011
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11. Estudo da reação de oxidação preferencial do co sobre o sistema CuO/CeO2-TiO2
Cu catalysts supported on CeO2, TiO2 and CeO2/TiO2 were prepared by precipitation method and used for preferential oxidation of carbon monoxide contained in a hydrogen flow generated by methane steam reforming. The samples were characterized by XRD, BET and TPR techniques. The catalytic properties were studied in the 50-330ºC range by using a quartz micro-r
Química Nova. Publicado em: 2010
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12. PD/AL2O3 catalysts modified with la: preparation, characterization and catalytic properties in the steam and autothermal reforming of methane reactions. / Catalisadores de Pd/Al2O3 modificados com La: preparação, caracterização e propriedades catalíticas nas reações de reforma a vapor e autotérmica do metano
Os catalisadores de Pd foram preparados por impregnação dos suportes utilizando-se uma solução aquosa de nitrato de paládio. Os suportes (x)La2O3-Al2O3, com x = 0 a 20 % em peso, foram obtidos pelos métodos de impregnação úmida e sol gel. Os suportes e catalisadores foram caracterizados por fisissorção de N2, difração de raios X, termogravimetri
Publicado em: 2010