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Prospecção tecnológica em base de patentes: análise de tendências de tecnologias que empregam a radiação solar para produção de energia
(Universidade Federal de Santa Maria, 2020-02-28)
The increased concern for the environment, coupled with the high cost of fossil fuels makes humanity look for new means of generating energy, different from traditional methods using non-renewable sources. The way found ...
Adsorção de níquel (II) usando leito fixo de carvão ativado em condições subcríticas
(Universidade Federal de Santa Maria, 2020-02-27)
In the present work, the use of subcritical conditions in the nickel adsorption process on activated carbon in a fixed bed was investigated in the aqueous medium, with variation of the values for different pressure (from ...
Potencial de hidróxidos duplos lamelares de Zn-Al e Mg-Fe para adsorção de 2-nitrofenol
(Universidade Federal de Santa Maria, 2020-02-28)
Two Zn-Al and Mg-Fe layered double hydroxides (LDH) were synthesized by coprecipitation method in order to increase the adsorption potential of 2-nitrophenol (2-NP). Both adsorbents were characterized by the techniques of ...
Produção de enzimas hidrolíticas por Beauveria bassiana em fermentação submersa assistida por ultrassom
(Universidade Federal de Santa Maria, 2020-02-19)
The ability of the fungus Beauveria bassiana to produce hydrolytic enzymes in nutritious media has been known for many years, as well as the role of these enzymes in the fungal infectious process. This work defines a ...
Síntese e caracterização de hidróxidos duplos lamelares para adsorção de o-nitrofenol de soluções aquosas
(Universidade Federal de Santa Maria, 2020-10-08)
In this work, layered double hydroxides (LDHs) based on calcium-aluminium (Ca-Al), nickel-aluminium (Ni-Al) and zinco-aluminium (Zn-Al) were evaluated at adsorptive removal of o-nitrophenol from aqueous solutions. The ...
Modelagem da difusão intrapartícula para predição da cinética da esterificação catalítica heterogênea de ácido acético e isopropanol empregando Nb2O5
(Universidade Federal de Santa Maria, 2020-09-29)
The esterification reaction is one of the most important processes of organic synthesis in liquid phase, since esters have many applications in the chemical industry. Isopropyl acetate, for example, is used as a solvent ...
Impregnação de TiO2 em biochar derivado de resíduo de café para fotodegradação de diclofenaco em soluções aquosas
(Universidade Federal de Santa Maria, 2020-10-07)
In this work, a novel composite based on coffee grounds biochar was prepared with immobilized titanium dioxide (TiO2) and used for photodegradation of diclofenac in aqueous solution. Composites with different mass proportions ...
Emprego do ultrassom para a desemulsificação de petróleos provenientes do pré-sal
(Universidade Federal de Santa Maria, 2020-09-21)
The presence of emulsified water in crude oil is a natural consequence of the formation and the production process, leading to crude oil emulsions in petroleum production. Emulsion separation is necessary for industrial ...
Avaliação da reação de interesterificação do óleo de soja degomado e acetato de metila catalisada por fosfato de nióbio
(Universidade Federal de Santa Maria, 2021-10-04)
Biodiesel is considered the cleanest and most viable fuel in the world, an alternative to petroleum, which is less polluting and does not contribute to the increase in carbon dioxide emissions. The incessant search for new ...
Análise experimental e numérica da remoção dos herbicidas ácido diclorofenoxiacético (2,4 D) e atrazina de efluentes líquidos
(Universidade Federal de Santa Maria, 2021-09-15)
The present work studies a batch adsorption process for the removal of herbicides that, due to their large consumption on the soil surface of agricultural plantations, have been accumulating and may exceed the limits of ...