Metal Support Interaction
Mostrando 1-12 de 23 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. Rhenium(I) Polypyridine Complexes as Luminescence-Based Sensors for the BSA Protein
The binding interaction of rhenium(I) complexes fac-[Re(CO)3(NN)(py)]+, py = pyridine and NN = 1,10-phenanthroline (phen), 4,7-diphenyl-1,10-phenanthroline (ph2phen) or 4,7-dichloro-1,10-phenanthroline (Cl2phen), and bovine serum albumin (BSA) was investigated at physiological pH using emission intensity variation and circular dichroism (CD) spectroscopy. Th
J. Braz. Chem. Soc.. Publicado em: 2016-01
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3. 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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4. Catalisadores de Pt suportados, obtidos pelo método solgel : efeito do cério na atividade e estabilidade nas reações de reforma do metano
The effect of Ce as a structural and electronic promoter on the activity and stability of Pt catalysts supported on Al2O3 for methane reforming reactions were investigated to elucidate the metal-support interaction. Pt/Al2O3 and Pt/CeO2-Al2O3 catalysts were prepared by conventional method of wet impregnation on commercial supports and on CeO2- Al2O3 mixed ox
Publicado em: 2009
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5. Influência do teor e efeito promotor de Ag, Fe, Pd e Pt ao catalisador Ni/CeZrO2 nas reações de oxidação parcial e reforma autotérmica do metano
In the present study the behavior of Ni/CeZrO2 catalysts were investigated for the autothermal reforming and partial oxidation of methane and compared with the sample 10%Ni/Al2O3. Samples with 1.5; 5 and 10% nickel were supported on CeZrO2 and catalysts 10%Ni/CeZrO2 promoted by different metals (Ag, Fe, Pd and Pt). The catalysts were characterized by BET sur
Publicado em: 2007
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6. InfluÃncia do teor e efeito promotor de Ag, Fe, Pd e Pt ao catalisador Ni/CeZrO2 nas reaÃÃes de oxidaÃÃo parcial e reforma autotÃrmica do metano
In the present study the behavior of Ni/CeZrO2 catalysts were investigated for the autothermal reforming and partial oxidation of methane and compared with the sample 10%Ni/Al2O3. Samples with 1.5; 5 and 10% nickel were supported on CeZrO2 and catalysts 10%Ni/CeZrO2 promoted by different metals (Ag, Fe, Pd and Pt). The catalysts were characterized by BET sur
Publicado em: 2007
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7. Theoretical study of transition metal monocarbides: MnC and CoC. / Estudo teórico de monocarbetos de metais de transição: MnC e CoC
In this work, high level ab initio multiconfigurational methods were employed to study the electronic structures and chemical bondings of several electronic states of two 3d transition metal monocarbides: MnC and CoC. The lowest-lying quartet, sextet, and octuplet electronic states of MnC, correlating with the three lowest-lying atomic dissociation channels,
Publicado em: 2006
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8. "Desenvolvimento de catalisadores de rutênio suportado em CeO2/Al2O3 para a reação de reforma a vapor e oxidativa de etanol" / "CeO2/Al2O3-supported ruthenium catalysts for the steam and oxidative reforming of ethanol"
Aiming at hydrogen production, as a source of renewable energy, Ru/CeO2-Al2O3 catalysts were studied in ethanol steam reform and ethanol oxidative reforming. The effect of the support and metal/support interaction was verified on the activity and selectivity of the reactions. The supports and catalysts were characterized by x-rays dispersive spectroscopy (XD
Publicado em: 2006
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9. IgG purification from human plasma by membrane affinity chromatography with immobilized Cu(II) and Ni(II) : effect of quelators IDA, TREN and CM-Asp / Purificação de IgG a partir do plasma humano por cromatografia em membranas con ions Cu(II) e Ni(II) imobilizados : efeito dos agentes quelantes IDA, TREN e CM-Asp
The use of immunoglobulin G (lgG) in therapeutic applications has growing vastly and it is used in the treatment of a growing number of indications. Several chromatographic techniques have been investigated for IgG purification. In this work, we investigated the effect of the chelators iminodiacetic acid (IDA), carboxymethylaspartate acid (CM-Asp) and Tris-2
Publicado em: 2006
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10. Estudo da Adição do Promotor Cu aos Catalisadores Pt/Al2O3 e Pt/Nb2O5 para a Oxidação Seletiva de CO / Study of the Addition of Cu Promoter to the Pt/Al2O3 and Pt/Nb2O5 catalysts for the Selective Oxidation of CO
The fuel cells are an alternative to generate energy without polluting the environment. They produce electric energy through the reaction of hydrogen with the oxygen from air. The product of the reaction is water. It is an interesting form of generation energy because its a clean technology. The hydrogen used as combustible for the fuel cells is proceeding f
Publicado em: 2005
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11. ESTUDO DA INTERAÇÃO METAL-SUPORTE EM CATALISADORES DE RUTÊNIO PROMOVIDOS POR BÁRIO E CÉSIO PARA A SÍNTESE DE AMÔNIA / THE STUDY OF METAL-SUPPORT INTERACTION ON BARIUM AND CESIUM PROMOTED RUTHENIUM CATALYSTS FOR THE AMMONIA SYNTHESIS
The industrial ammonia synthesis process uses a triple promoted iron catalyst, operating at drastic temperature conditions between 673K and 973K, and high pressure (300atm). New catalysts have been studied, replacing iron, to increase NH3 production. The main advantage of Ru-based catalysts is that they are less sensitive to poisoning by ammonia than Fe-base
Publicado em: 2004
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12. Estudo do Catalisador (10%Ni-1%Cu) suportado na oxidação parcial indireta do Etanol
In the present work, the reaction of indirect partial oxidation of the ethanol for production of H2 for fuel cells was studied in catalysts 10%Ni-1%Cu (% mass) on different supports (Al2O3, SiO2-50, SiO2-200, Nb2O5 and CeZrO2). The catalysts were prepared by coimpregnation, leaving from aqueous solution of the respective nitrates, dry and calcined. The oxide
Publicado em: 2004