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Hidrogenação de CO2 sobre catalisadores à base de elementos não-nobres: a influência da composição química do catalisador e de condições reacionais na produção de álcoois
(Universidade Federal de São Carlos, 2022-11-30)
Strategies to reduce CO2 emissions and control the increase in atmospheric levels of this gas are urgent. A promising approach to help minimize the accumulation of CO2 in the atmosphere and the corresponding negative ...
Produção de ácido hialurônico microbiano: viabilidade econômica e avaliação de impactos ambientais
(Universidade Federal de São Carlos, 2022-10-28)
Hyaluronic acid is a biopolymer with unique structural and rheological properties, that, initially, was produced by extraction from animal tissue, from rooster comb. However, it used non-ecofriendly solvents (chloroform) ...
Modelagem matemática aplicada ao estudo de células a combustível a etanol direto
(Universidade Federal de São Carlos, 2022-03-09)
The current fuel cell market is dominated by Hydrogen cells. Nevertheless, due to Hydrogen’s high reactivity, the difficulty in storage and the lack of infrastructure to distribute it, Hydrogen cells might not be the most ...
Estudo da reação de hidrogenação de CO2 em materiais à base de Cu via catálise heterogênea
(Universidade Federal de São Carlos, 2022-07-07)
CO2 is a greenhouse gas whose production has intensified in recent decades, generating its accumulation in the Earth’s atmosphere. Thereby, numerous negative environmental changes, such as the aggravation of the greenhouse ...
Aplicação de redes neurais artificiais no sinal FBRM para monitorar a cristalização de Paracetamol
(Universidade Federal de São Carlos, 2022-02-23)
Obtaining high added value products in the chemical industry is directly related to separation operations carried out to achieve the specifications required by regulatory agencies. The crystallization, one of the most used ...
Electrochemical desalination using polyglycerol activated carbon: electrode, cell, and process development
(Universidade Federal de São Carlos, 2022-11-18)
Capacitive deionization (CDI) has emerged as a promising electrochemical technology for the desalination of brackish water, which promotes the electrosorption of ions in the electrical double layer. In recent years, there ...
Transesterificação heterogênea catalisada por sílicas contendo sítios básicos e cátions cetilvinilimidazólio
(Universidade Federal de São Carlos, 2022-05-12)
Homogeneous catalysis is the most used process in the production of biodiesel, although this process has several disadvantages such as: the catalyst cannot be easily reused and requires parallel processes for separation ...
Estudos sobre a produção de nanofibras de PVA via electrospinning e sua aplicação em filtração de nanoaerossóis
(Universidade Federal de São Carlos, 2022-09-30)
Poly(vinyl alcohol) nanofibers for air filtration were produced by electrospinning using citric acid and different concentrations of Triton X-100 surfactant. Filtration tests with nanoparticles (5.94–224.7 nm) and tests ...
Comparação da eletroxidação de compostos orgânicos usando eletrodos plano e tela considerando a área eletroativa e a transferência de massa
(Universidade Federal de São Carlos, 2022-02-22)
Toxic organic compounds present in industrial effluents have their concentration limits for disposal determined by increasingly strict environmental and sanitary laws, as they can cause serious problems to the environment ...
Catalisadores de Au/ZrO2 e Au/In2O3/ZrO2: Efeito das propriedades eletrônicas e estruturais na atividade para desidrogenação do etanol e hidrogenação de CO2
(Universidade Federal de São Carlos, 2022-10-28)
Au/ZrO2 and Au/In2O3/ZrO2 catalysts were developed for CO2 hydrogenation reaction and Au/ZrO2 for ethanol dehydrogenation. The monometallic gold catalysts supported on ZrO2 with different contents (0.3 to 5.0%w/w) were ...