Reforming Of Methane
Mostrando 25-36 de 45 artigos, teses e dissertações.
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25. Study of nickel catalysts supported on modified ZrO2 applied in reforming reactions / Estudo de catalisadores de níquel suportados em ZrO2 modificados aplicados em reações de reforma
Zirconium dioxide is a material with physics and chemical characteristics that can be applied in many fields, as academic as industrial. In the catalysis, the interest in systems based on zirconia (ZrO2) are growing- up quickly, as a catalyst as a support, considering that ZrO2 properties can be changed by the addition of different cations. The objective of
Publicado em: 2008
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26. Effect of CeO2 loading on the properties of Ni/CeO2/Al2O3 catalysts on the methane steam and with carbon dioxide reformings / Efeito da adição de CeO2 no catalisador Ni/Al2O3 aplicado durante as reações de reforma a vapor e com dióxido de carbono do metano
Na atualidade, a reforma do metano é de grande interesse industrial para o aproveitamento deste gás na produção de hidrogênio e de gás de síntese. Entre as reações de reforma do metano, destacam-se as reações de reforma a vapor e a reação com dióxido de carbono.O catalisador comumente utilizado nos processos re reforma do metano é Ni/Al2O3. Po
Publicado em: 2008
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27. Síntese e caracterização de perovskitas LaNi(1-x)Co xO3 como precursores de catalisadores para a conversão do metano a gás de síntese pela reforma com CO2
LaNiO3 perovskite was modified by partial substitution of nickel by cobalt in order to increase the stability and resistance to carbon deposition during the methane CO2 reforming. The results showed that a suitable combination of precipitation and calcination steps resulted in oxides with the desired structure and with important properties for application in
Química Nova. Publicado em: 2007-04
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28. "Aplicação de catalisadores de níquel e cobalto preparados via precursores do tipo hidrotalcita nas reações de reforma a vapor, oxidação parcial e reforma oxidativa do metano" / "Application of nickel and cobalt catalysts prepared via hydrotalcite-type precursors in the reactions of steam reforming, partial oxidation and oxidative reforming of methane"
One of the most important applications of methane is the syngas production, a mixture of H2 and CO. Three processes can lead to syngas formation from methane: steam reforming, CO2 reforming and partial oxidation. Various non-noble metal catalysts were studied in these processes, although the carbon deposition or the metal sinterization is always observed. Ca
Publicado em: 2007
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29. ProduÃÃo de gÃs de sÃntese por tri-reforma do metano em reator de leito fixo
The ever increasing availability of natural gas (NG), and the abundant carbonic gas production, via fermentation of most prepared from sugar cane products (sugar cane juice, and molasses), thermoelectric generators, and refineries have enhanced the research interest of these commodities. The indirect NG conversion processes to synthesis gas (CO and H2), the
Publicado em: 2007
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30. 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
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31. 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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32. 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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33. Nanopartículas de Pt suportadas em Al2O3 e CeO2-Al2O3: síntese, caracterização e propriedades catalíticas para reforma do metano.
A new method to prepare Pt nanoparticles (NPs) dispersed on Al2O3 and CeO2-Al2O3 is described in this work. The Pt-NPs were used to prepare CeO2-Al2O3-supported Pt nanocatalysts (Pt-NPs/Al2O3 and Pt-NPs/CeO2-Al2O3). The catalysts were characterized by BET surface area (SBET), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) reaction of
Publicado em: 2007
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34. Síntese e caracterização de catalisadores de LaNiO3 não suportados e suportados em Al2O3 e ZrO2 para a reforma a vapor do metano
Ionic oxides with ABO3 structure, where A represents a rare earth element or an alkaline metal and B is a transition metal from group VIII of the periodic table are potential catalysts for oxidation and good candidates for steam reforming reaction. Different methods have been considered for the synthesis of the oxide materials with perovskite structure to pr
Publicado em: 2007
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35. Estudo do efeito da dopagem da alumina com CÃrio em catalisadores Pt/CeZrO2/Al2O3 na reaÃÃo de oxidaÃÃo parcial do Metano
The transformation of methane into liquid fuels has drawn a lot of attention in the last years due to both economical and environmental concerns. Currently, the main route to obtain synthesis gas from methane is the steam reforming. The major problems associated with this route are the high temperatures and pressures required. Nowadays, the partial oxidation
Publicado em: 2007
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36. Reforma autotérmica do metano em catalisadores de Ni/CeZrO2/Al2O3 para a produção de hidrogênio
Neste trabalho, catalisadores de níquel suportados em CeO2/Al2O3 e CeZrO2/Al2O3 foram investigados na reforma autotérmica do metano, visando a produção de hidrogênio. Foram utilizados dois tipos de aluminas de diferentes áreas (Al2O3-D e Al2O3-C), na preparação das amostras. Assim, foram preparadas duas séries de catalisadores: uma foi suportada em
Publicado em: 2007