Ethylbenzene Dehydrogenation
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Co2 na desidrogenação oxidativa do etilbenzeno utilizando catalisadores compostos de óxido de ferro e óxido de alumínio
Materials containing aluminum and iron oxide were synthesized through the preparation of hybrid spheres and tested in the dehydrogenation of ethylbenzene in the presence of CO2. The catalytic results suggest that the high initial ethylbenzene conversion is due to the contribution of basic sites. These results also point to a competitive process between CO2 a
Química Nova. Publicado em: 2011
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2. Preparação, caracterização e avaliação de óxidos de ferro e cobalto suportados em carvão ativado polimérico como catalisador na reação de desidrogenação do etilbenzeno / Preparation, characterization and evaluation of iron oxides and cobalt supported on activated carbon and polymeric catalysts for the dehydrogenation of ethylbenzene
Neste trabalho foram sintetizados catalisadores suportados em carvões ativados, que foram obtidos por meio da carbonização de uma matriz polimérica. O precursor do carvão ativado foi o copolímero de estireno e divinilbenzeno sulfonado, que foi sintetizado por meio de polimerização em suspensão, na presença de diluentes inertes para a produção de
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/02/2010
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3. Preparation, characterization and evaluation of iron oxides and cobalt supported on activated carbon and polymeric catalysts for the dehydrogenation of ethylbenzene / Preparação, caracterização e avaliação de óxidos de ferro e cobalto suportados em carvão ativado polimérico como catalisador na reação de desidrogenação do etilbenzeno
In this work were synthesized catalysts supported on activated carbons, which were obtained by carbonization of a polymer matrix. The precursor of activated carbon was the sulfonated styrene-divinylbenzene copolymer, which was synthesized by suspension polymerization in the presence of inert diluents to produce a macroporous network structure. The chemical m
Publicado em: 2010
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4. SÃntese de esferas hÃbridas e seu desempenho na reaÃÃo de desidrogenaÃÃo do etilbenzeno na presenÃa de diÃxido de carbono / Synthesis of hybrid spheres and their performance in the dehydrogenation reaction of ethylbenzene in carbon dioxide presence
The various possibilities of application of the mesoporous materials, such as catalysis and adsorption, it have encouraged the research in the synthesis of these materials. In addition, but less frequent, synthetic routes have been searched in order to obtain a material whose structure and grain size allow its application in industrial reactors, without the
Publicado em: 2009
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5. Obtaining magnesium and vanadium catalysts supported on activated carbon for the production of styrene. / Obtenção de catalisadores de vanádio e magnésio suportados em carvão ativado para a produção de estireno.
The main route industrially used for styrene production is the ethylbenzene catalytic dehydrogenation, responsible for more than 90% of its worldwide capacity. The industrial process is performed at the temperature range of 550-700 C with an excess of heated steam over potassium and chromium-promoted iron oxide catalysts, which are toxic and have 2-year life
Publicado em: 2008
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6. Modelagem e simulação da operação de um reator de leito fixo catalitico envolto em membrana permseletiva / Modeling and simulation of fixed bed reactor wrapped with permselective membranes
Styrene is an important monomer in the manufacture of thermoplastic and synthetic rubbers. Most of the production is based on the catalytic dehydrogenation of ethylbenzene. The increase of the styrene productivity can be reached using permselectives membranes for hydrogen removal, suppressing the reversible and secondary reactions. This work presents the sim
Publicado em: 2007
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7. Síntese e avaliação de óxido de ferro suportado em carvão ativado polimérico como catalisador na desidrogenação do etilbenzeno
In this work, activated carbon were synthesized through carbonization of a polymer, containing iron oxides with and without copper. The precursor of activated carbon was a styrenedivinylbenzene copolymer (StyDVB) synthesized through suspension polymerization, in the presence of inert diluentes to obtain a macroporous structure. The resin was sulfonated with
Publicado em: 2007
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8. Caracterização de amostras petroquímicas e derivados utilizando cromatografia gasosa bidimensional abrangente (GCxGC)
The goal of this article is to discuss the application of comprehensive two-dimensional gas chromatography (GCxGC) to petrochemical samples. The use of GCxGC for petroleum and petroleum derivatives characterization, through group type analysis, or BTEX (benzene, toluene, ethylbenzene, xylenes), total aromatic hydrocarbons, polyaromatic hydrocarbons, sulfur-c
Química Nova. Publicado em: 2006-07
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9. Influência do método de preparação nas propriedades do óxido de ferro suportado. / Influence of preparation method on properties of iron oxide supported.
Styrene is one of the most important basic chemicals to produce valuable commodities such as polystyrene, acrylonitrile-butadiene-styrene and styrene-butadiene-styrene. It is commercially produced by the dehydrogenation of ethylbenzene in the presence of large amounts of steam at high temperatures of 600-700 oC. This process is thermodynamically limited and
Publicado em: 2005
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10. Ação promotora do zinco em catalisadores de síntese do estireno
Ethylbenzene dehydrogenation in the presence of steam is the main commercial route to produce styrene. The industrial catalyst is chromium and potassium-doped hematite, which easily deactivates with time due to potassium loss. In order to find non-toxic and potassium free catalysts, the promoter action of zinc on hematite was studied in this work. It was fou
Química Nova. Publicado em: 2004-04
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11. Desidrogenação do etilbenzeno sobre compostos de ferro e alumínio
Chromium and potassium-doped iron oxides are widely used as industrial catalysts in the dehydrogenation of ethylbenzene to produce styrene. They have several advantages but deactivate with time, because of the loss of potassium. Also, they are toxic due to chromium compounds. Therefore there is a need for developing alternative non toxic catalysts without po
Química Nova. Publicado em: 2003-03
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12. Reforma catalitica do n-octano visando a produção de aromaticos
Catalytic Refonning is a process of great interest to the petrochemical industry for the production of aromatic compounds that are raw material to the manufacture of plastics, elastomers and resins. The catalytic refonning reaction of n-octane was studied in a Berty type reactor with internal recycle aiming on the maximization of xylenes and ethylbenzene. A
Publicado em: 1997