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Hidrotalcitas multimetálicas para produção de gás de síntese a partir do biogás
(Universidade Federal de São Carlos, 2015-03-18)
In this work, catalysts derived from hydrotalcites were employed in Direct Reforming of Biogas, once they feature the necessary basicity to allow and improve carbon removal during reforming. As a differential study, the ...
Hidrotalcitas de Ni-Mg-Al como precursores de catalisadores para produção de gás de síntese a partir de biogás
(Universidade Federal de São Carlos, 2010-07-29)
Catalysts obtained by thermal decomposition of the precursors with hydrotalcite-like structure [Mg1-xAlx (OH)2]x+ [CO3]x/n. mH2O and [Ni1-x Mg1-xAlx (OH)2]x+ [CO3]x/n. mH2O were prepared, characterized and tested in the ...
Efeito das condições de preparação da [CTA+]-SiMCM-41 na atividade da transesterificação
(Universidade Federal de São Carlos, 2010-02-26)
The hybrid [CTA+]-SiMCM-41 mesoporous material (where CTA+ is the cetyltrimethylammonium cation) was employed as synthesized in the transesterification reaction between ethyl acetate and methanol. This is a model reaction ...
Síntese e propriedades da zeólita FAU com cristais nanométricos
(Universidade Federal de São Carlos, 2010-07-21)
The FAU zeolite was obtained using different amounts of water. Both at higher levels as the lowest amount of water the intensities of the diffraction peaks are less intense. The results of physisorption of these samples ...
Catalisadores bimetálicos Pt-Fe/CeO2 para a reação de oxidação preferencial do CO
(Universidade Federal de São Carlos, 2010-03-31)
The objective of this work is to study the preferential oxidation (PROX) of carbon monoxide in H2-rich feed streams over Pt-Fe/CeO2 catalysts in a feed gas composed of 3% CO, 1.5% O2, 80% H2, and N2 (for balance). The ...
Síntese da sílica MCM-41 usando um surfactante catiônico polimerizável e avaliação na transesterificação catalítica
(Universidade Federal de São Carlos, 2014-02-20)
The masters work presented is result of a great effort provided by the group, which has worked with changes in the synthesis of CTA-MCM-41. The synthesis of the M41S family (composed of mesoporous silica MCM-41, MCM-48 and ...
Estudos sobre a síntese da zeólita Beta na presença de íons fluoreto
(Universidade Federal de São Carlos, 2013-02-27)
One alternative to increase the octane rating of gasoline without the use of toxic or polluting compounds, banned by environmental legislation, is the transformation of linear paraffins of low octane number into branched ...
Catalisadores à base de CuO, Fe2O3 ou CuO-Fe2O3 suportados sobre y-Al2O3, ZrO2 ou ZrO2/y-Al2O3 para a redução de NO com CO
(Universidade Federal de São Carlos, 2014-03-31)
NO, NO2 and N2O nitrogen oxides, named NOx, strongly contribute to the air pollution and to minimize their emissions are used catalytic processes. The catalytic reduction of NO with CO has the advantage to simultaneously ...
Reforma a vapor do ácido acético sobre catalisadores de Ni/Al2O3: estudo das rotas reacionais
(Universidade Federal de São Carlos, 2014-02-21)
Acetic acid (AA), one majority substance contained in the bio-oil from biomass pyrolysis, was used as a model molecule for study of reaction routes of steam reforming on Ni/θ-Al2O3 catalysts. The catalyst containing ...
Catalisadores à base de Cu, Zn, Al e Ce aplicados à reação deslocamento gás-água
(Universidade Federal de São Carlos, 2014-03-26)
The water gas-shift reaction (WGS) is an important step in the production process and purification of H2 from hydrocarbon. Commercially, to overcome the thermodynamic and kinetic limitations, this reaction occurs in two ...