Search
Now showing items 551-560 of 647
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 ...
Estudo da cristalização da sacarose com adição de antissolvente
(Universidade Federal de São Carlos, 2013-03-28)
In the study of the sucrose crystallization process, the nucleation phenomena
and crystalline growth have been evaluated, when the systems were submitted to
different solvent and operational conditions.
The main objective ...
Craqueamento de cicloexano sobre zeólitas ácidas : atividade, seletividade e influência da presença de mesoporosidade
(Universidade Federal de São Carlos, 2012-03-30)
The need to develop a catalyst capable of processing heavy oil fractions, which is extracted from deeper wells, is essential. This concern has become more remarkable with the discovery of new oil fields in Brazil. This ...
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 ...
Hidrólise enzimática dos polissacarídeos do café
(Universidade Federal de São Carlos, 2013-08-29)
Instant coffee is one of the main products generated by food industry worldwide, consisting of solubilized fraction from roasted and grounded coffee by heat treatment in two steps: thermal extraction at 125 0C, followed ...
Aplicação de técnicas de modelagem e simulação para a produção de etanol de segunda geração
(Universidade Federal de São Carlos, 2013-09-20)
The use of fossil fuels has a significant impact on the environment, making biofuels a renewable and friendly alternative. Brazil, as one of the leading producers of sugar and ethanol, generates as main residue sugar cane ...
Melhoria do cetano em óleo diesel : abertura do ciclo da decalina sobre catalisadores de Pt, Ir ou Rh suportados em zeólitas FAU e BEA
(Universidade Federal de São Carlos, 2011-06-08)
Environmental laws and stricter quality specifications have driven the development of technologies for improving the cetane number in diesel fuel. In addition to the saturation of (poly)aromatic compounds, responsible for ...
Otimização da produção de etanol 2G a partir de hexoses e pentoses
(Universidade Federal de São Carlos, 2014-02-27)
The industrial production of fuel ethanol and sugar generates the main byproduct of sugarcane bagasse, which is burned in boilers for power generation. However, as a lignocellulosic material (consisting basically of three ...
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 ...