Methane Combustion The Catalysts
Mostrando 1-9 de 9 artigos, teses e dissertações.
-
1. Química Sem Fronteiras: o desafio da energia
Coal, natural gas and petroleum-based liquid fuels are still the most widely used energy sources in modern society. The current scenario contrasts with the foreseen shortage of petroleum that was spread out in the beginning of the XXI century, when the concept of "energy security" emerged as an urgent agenda to ensure a good balance between energy supply and
Quím. Nova. Publicado em: 2013
-
2. Palladium-supported catalysts in methane combustion: comparison of alumina and zirconia supports
Palladium catalysts supported on alumina and zirconia were prepared by the impregnation method and calcined at 600 and 1000 ºC. Catalysts were characterized by BET measurements, XRD, XPS, O2-TPD and tested in methane combustion through temperature programmed surface reaction. Alumina supported catalysts were slightly more active than zirconia supported cata
Química Nova. Publicado em: 2012
-
3. Síntese de catalisadores do tipo LaNixFe1-xO3 como precursores catalíticos para reação oxidação parcial do metano
Nickel-bases catalysts have been used in several reform reactions, such as in the partial oxidation of methane to obtain H2 or syngas (H2 + CO). High levels of conversion are usually obtained using this family of catalysts, however, their deactivation resulting from carbon deposition still remains a challenge. Different approaches have been tested aiming at
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/02/2011
-
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
-
5. Carbon nanofibers: a versatile catalytic support
The aim of this article is present an overview of the promising results obtained while using carbon nanofibers based composites as catalyst support for different practical applications: hydrazine decomposition, styrene synthesis, direct oxidation of H2S into elementary sulfur and as fuel-cell electrodes. We have also discussed some prospects of the use of th
Materials Research. Publicado em: 2008-09
-
6. Reforma autotÃrmica do metano em catalisadores de Ni/CeZrO2/Al2O3 para a produÃÃo de hidrogÃnio
In this work, nickel catalysts supported on CeO2/Al2O3 and CeZrO2/Al2O3 were investigated in reforming autothermal of methane, aiming hydrogen production. Two types of aluminas with different areas were used (Al2O3-D and Al2O3-C). Therefore, two catalysts series were prepared: one was supported on Al2O3-D, and another series supported on Al2O3-C. The charact
Publicado em: 2007
-
7. Catalytic combustion of methane by palladium-supported molecular sieves / Combustão catalitica de metano usando paladio suportado em peneiras moleculares
The partieipation of the natural gas in energy generation has grown significantly in the last years in Brazil as well as in the world. Its use in the combustion generates emission pollutants in lower degrees when compared to other fossils fuels. This is very important in times when the goals of the Kyoto s protocol have to be achieved. In this sense, the Bra
Publicado em: 2005
-
8. Aplicação de catalisadores de paládio suportado em alumina na combustão catalítica do metano.
Neste trabalho foram sintetizados catalisadores do tipo PdOIAh03 ativos para a combustão do metano numa ampla faixa de temperatura. Os catalisadores aplicados na combustão catalítica a baixas temperaturas (inferiores a 600C) foram sintetizados com o objetivo de avaliar a influência da natureza do precursor de paládio e da rota de preparação sobre as s
Publicado em: 2005
-
9. A combustão catalítica do metano: estudo estatístico do efeito das variáveis de preparação e pré-tratamento de catalisadores de paládio suportado sobre a atividade catalítica
The catalytic combustion of methane on alumina supported palladium catalysts was studied. It has been reported that the activity of the catalyst increases with its time on line, despite of an increase of the palladium particle size. However, different preparation, pretreatment and testing conditions can be the reason for the observed different results. An ex
Química Nova. Publicado em: 2001-04