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Itens para a visualização no momento 11-20 of 22
Estudo de catalisadores de cobre suportados para a reação de oxidação preferencial do CO
(Universidade Federal de São Carlos, 2010-06-30)
The CO preferential oxidation reaction (PROX-CO) has been widely studied in last few years. Aiming H2 purification for proton-exchange membrane cells (PEMFC) use, the main role of the PROX-CO reaction should be reduce the ...
Síntese e propriedades de sílicas híbridas contendo surfactantes catiônicos
(Universidade Federal de São Carlos, 2015-09-21)
The control of pore geometry and pore diameter of silica mesoporous materials is
necessary for application of these materials, mainly in industrial process that depends on the shape selectivity. This way, considerable ...
Óxidos mistos de magnésio e alumínio contendo lítio e cálcio como catalisadores para transesterificação etílica
(Universidade Federal de São Carlos, 2013-03-08)
This work deals with the investigation on the production of heterogeneous catalysts of base surface properties applied for ethylic transestérification, aiming the biodiesel production. In the first and second chapters of ...
Zéolitas ZSM-12 mesoporosas textura, cristalinidade e atividade ácida para o craqueamento de cicloexano
(Universidade Federal de São Carlos, 2013-09-12)
The research addressed the generation of mesoporosity in the zeolite ZSM-12 (MTW). In the first part we studied the synthesis of ZSM-12 via conventional methodology and in the presence of a mesopore directing agent, ...
Formação de mesoporosidade em zeólitas ZSM-5: avaliação do método de preparação e do potencial como catalisador ácido através do craqueamento de cicloexano
(Universidade Federal de São Carlos, 2012-04-27)
Due to their potential as acid catalyst and hydrothermal stability, USY, ZSM-5 and modernite zeolites are widely used in several processes of petroleum refining and petrochemical industries. With the discovery of new ...
Síntese e avaliação catalítica das zeólitas com estrutura BEA, MFI e MTW na reação de Knoevenagel
(Universidade Federal de São Carlos, 2014-08-22)
The use of zeolites in basic catalysis is small, especially when compared to the numerous applications of material in their acid form. Inside this context, are even smaller the number of studies on the use of as-synthesized ...
Avaliação do catalisador CTA-MCM-41, modificado por poliacrilatos, na transesterificação de monoéster
(Universidade Federal de São Carlos, 2014-03-24)
The silica hybrid CTA-MCM-41 (where CTA is the cetyltrimethylammonium cation) was synthesized and used in the transesterification of ethyl acetate with methanol. This is a model reaction used to test basic catalysts for ...
Propriedades eletrônicas e estruturais do Cu/ZrO2 aplicadas à reação do etanol
(Universidade Federal de São Carlos, 2012-06-22)
Copper is a typical catalyst for dehydrogenation of ethanol to acetaldehyde. However, copper supported on ZrO2 was found to be extremely active and selective to convert ethanol directly to ethyl acetate. Several reports ...
Efeito do teor de CeO2 em catalisadores de Pt/CeO2-Al2O3 para as reações de oxidação parcial e reforma do metano.
(Universidade Federal de São Carlos, 2005-03-10)
The effect of CeO2 loading in Pt/CeO2-Al2O3 catalysts was investigated. Pt
catalysts supported on mixed CeO2-Al2O3 carriers with different CeO2 loading 1,
3, 6, 12, 20 wt.% were prepared by incipient wetness impregnation ...
Catalisadores contendo espécies V2O5 ou VO2+ : atividade e seletividade na redução de NO com amônia
(Universidade Federal de São Carlos, 2009-08-03)
The selective catalytic reduction of NOx with ammonia is the best technology available today to carry out the abatement of nitrogen oxide emissions in industrial gas effluents. Currently, vanadia-titania catalysts promoted ...