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Avaliação do híbrido CTA-MCM-41, modificado por poliestireno, na transesterificação catalítica de monoéster
(Universidade Federal de São Carlos, 2013-09-29)
The present work shows a new technique applied to the synthesis of heterogeneous catalysts MCM-41 containing basic alkylammonium cations and the study of stability in the transesterification reactions of monoesters. MCM-41 ...
Análise da secagem convectiva de folhas de manjericão (Ocimum basilicum L.)
(Universidade Federal de São Carlos, 2013-03-19)
Convective drying of leaves involves heat and mass transfer in packed-beds of deformable material, since the leaves shrink significantly when the moisture is removed. Therefore, the packing structure changes over time, and ...
Redução de NO com CO sobre catalisadores de CuO, Fe2O3 e CuO-Fe2O3 suportados em TiO2, ZrO2 e TiO2-ZrO2 - efeito do vapor de água na atividade e seletividade a N2
(Universidade Federal de São Carlos, 2013-04-26)
The combustion of petroleum fuels produces large emissions of NOX, SOX and other strong atmospheric pollutants. The abatement of NOX can be achieved by the nonselective catalytic reduction of NO with CO, for that, supported ...
Adição de fósforo (P) em catalisadores NiMo, suportados em γ-Al2O3, Al2O3/TiO2 e TiO2 - efeito na hidrodessulfurização do tiofeno
(Universidade Federal de São Carlos, 2013-02-18)
Mo, NiMo or NiMoP HDS catalysts were supported on Al2O3, Al2O3-TiO2 or TiO2. These supports were synthesized via sol-gel and in the case o TiO2 it was used a commercial sample. The active phases were introduced by impregnation. ...
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 ...
Produção de penicilina G acilase por organismos geneticamente modificados
(Universidade Federal de São Carlos, 2013-09-17)
Penicillin G acilase (PGA) is a key enzyme in the industrial production of β-lactamic antibiotics. In this work, it was studied the production of PGA from Escherichia coli by recombinant E. coli and from Bacillus ...
Síntese enzimática de ésteres catalisada por lipases imobilizadas em diferentes suportes
(Universidade Federal de São Carlos, 2013-03-22)
Lipases are enzymes of great biotechnological relevance. Besides its natural function (hydrolysis of triglycerides), they are capable of catalyzing regio- and enantioselective hydrolysis and synthesis of numerous esters. ...
Análise do efeito da composição química na secagem de pasta em leito de jorro
(Universidade Federal de São Carlos, 2013-03-11)
In the process of paste drying in spouted bed, the paste is submitted to the system, changes in rheological properties occur, a powder is formed and collected by a cyclone. Currently, various pastes have been tested and ...
Propriedades da sílica CTA-MCM-41 contendo metacrilatos e seu emprego na transesterificação de monoéster
(Universidade Federal de São Carlos, 2013-03-07)
The search for clean and renewable fuels has aroused great interest in the industry and scientific community with the growing demand for energy. The transesterification reaction of triglycerides is one way of achieving a ...
Modelagem e simulação em plantas de etanol: uma abordagem técnico-econômica
(Universidade Federal de São Carlos, 2013-07-26)
The ethanol (fuel grade and anhydrous) is, fundamentally, the most relevant global biofuel nowadays, in energy, environmental, economic and technological terms. This scenario brings up the Brazilian ethanol, made from ...