Centro Universitario FEI: Recent submissions
Now showing items 301-320 of 2258
-
Ultrasound-Assisted Conversion of Biomass Turpentine into -Terpineol
(2019-08-05)Biomass is an alternative and renewable carbon feedstock forfossil fuel in chemical industry. An important pathway forbiomass conversion is the conversion of turpentine oil intodifferent chemical intermediates. Herein ... -
Biomass transformation: Hydration and isomerization reactions of turpentine oil using ion exchange resins as catalyst
(2020-03-05)The hydration and isomerization of the biomass turpentine have been studied in the presence of Purolite CT175. The ion exchange resin catalyst was active for hydration and selective for producing terpenic alcohols, with a ... -
Experimental Measurements of Volumetric and Acoustic Properties 2 of Binary Mixtures of 1‑Butyl-3-methylimidazolium 3 Hexafluorophosphate with Molecular Solvents
(2020-06-22)In this study, measurements regarding the density and speed of sound for binary liquid mixtures of the 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6]) ionic liquid (+ methanol, or + acetonitrile, or ... -
Molecular interactions of ionic liquid {n-butylammonium methanoate (N4Met) + alcohols} at several temperatures: Thermodynamics and spectroscopic properties
(2020-09-05)New experimental data for density, speed of sound and viscosity for binary mixtures of protic ionic liquid {n-butylammonium methanoate (N4Met) + ethanol, or +1-propanol, or +1-butanol, or +1-pentanol} were measured in the ... -
Functionalized chitosan with butylammonium ionic liquids for removal of Cr(VI) from aqueous solution
(2020-09-17)Environmental pollution by heavy metals is currently a problem of great concern for human health. In this context, this study aims to contribute with the synthesis and characterization of chitosan functionalized with three ... -
Lignocellulosic derivative and chitosan bioadsorbent: Synthesis, characterization, and performance in chromium adsorption
(2020-03-14)Environmental pollution with heavy metals, especially with hexavalent chromium, is a serious problem worldwide. Therefore, in this study, the synthesis, characterization, and application of a heavy metal bioadsorbent, ... -
Superparamagnetic iron oxide nanoparticles (SPIONs) conjugated with lipase Candida antarctica A for biodiesel synthesis
(2020-10-20)Biodiesel is an alternative biodegradable and non-toxic fuel, with a low emission profile and capable of reducing significantly the level of carcinogenic pollutants released into the atmosphere. A newly designed nano-biocatalyst ... -
Projeto de reator multifuncional no acoplamento das reações de desidratação de etanol e hidrodealquilação do tolueno
(2019-08-22)Reatores multifuncionais possibilitam o acoplamento de um meio reacional exotérmico com um endotérmico, de modo que a energia cedida pelo primeiro supre o segundo. Isso pode levar a projetos de equipamentos com menor custo ... -
Chitosan and corn stover derivative bioadsorbent: characterization and application in hexavalent chromium adsorption processes
(2020-05-25)Several studies related to effluents treatment containing heavy metals have been developed, especially those that enable the application of lignocellulosic residues and natural polymers as well as chitosan to obtain ... -
Preparation of Fluorescent Carbon-Based Dots from Waste Tire Pyrolysis
(2020-10-30)The pyrolysis of waste tire has been proposed as an alternative route to its recycling producing residual oils that can be used as fuels. In this work, a physicochemical process to obtain carbonbased dots (CBD) from carbon ... -
Síntese de poli(2,3-dicloro-1,3-butadieno) bromado
(2019-11-05)O presente trabalho apresenta uma revisão sobre o processo de obtenção do poli(2,3- dicloro-1,3-butadieno) bromado, empregado na fabricação de adesivos. Também são apresentados resultados de ensaios exploratórios de ... -
Obtenção de ácido levulínico e outros produtos a partir de açúcares usando catalisadores heterogêneos
(2019-09-05)futuro como fonte de substâncias químicas para substituir aquelas derivadas de fontes minerais para criar novas plataformas de bioprodutos como alternativa de redução das emissões de CO2. Nesse aspecto, o ácido levulínico ... -
Evaluation of efficiency of avocado seed powder (persea americana) as a corrosion inhibitor in SAE 1008 carbon steel in acidic medium.
(2020-10-05)Having in mind that the synthetic inhibitors, currently used to prevent corrosion are aggressive to the environment, natural inhibitors, might be a valid alternative and an innovative solution to this problem, due to its ... -
Evaluation of palm kernel cake powder (Elaeis guineensis Jacq.) as corrosion inhibitor for carbon steel in acidic media.
(2020-12-18)This work aims to investigate the possible use of the palm kernel cake powder (Elaeis guineensis Jacq.) as corrosion inhibitor for ASTM 1020 carbon steel in acidic media (0.5 mol L−1 HCl). The investigation was carried ... -
Sistema Eletroquímico para Armazenamento de Energia - Bateria de Fluxo
(2020-04-05)As baterias são sistemas eletroquímicos de armazenamento de energia e, graças à evolução físico-química e dos materiais, hoje alcançam uma maior autonomia e durabilidade. Podem ser aplicadas em lugares antes não pensados, ... -
Sistemas de armazenamento eletroquímico de energia
(2017-04-05) -
Impacto nas Propriedades Mecânicas e Tensões Residuais do Material ASTM A572 Grau 50 Soldado por Arco Submerso com Alívio de Tensões Térmico
(2019-10-29)O aço ASTM A572 Grau 50 é utilizado na fabricação de conjuntos soldados para aerogeradores, por este motivo, a realização de alívio de tensões é de grande importância para correção dos impactos causados pelos processos de ... -
Review: Effect on physical, mechanical, and wear performance of ZrB -based composites processed with or without additives
(2020-06-03)Because of unique combination of properties, ultra high temperature ceramics (UHTCs) are considered the most suitable material for applications in extreme en-vironments as in hypersonic flights, atmospheric ... -
Influência da temperatura de resfriamento sobre a variação mássica e resistência mecânica de ABS injetado
(2020-06-22)Peças de ABS injetadas e submetidas a diferentes temperaturas de resfriamento podem apresentar variações em sua massa e diferentes níveis de resistência mecânica. O objetivo deste trabalho é estudar a influência da ... -
Tribological Behavior Analysis of the ISO 5832-1 Austenitic Stainless-Steel Treated by Optical Fiber Laser Used for Biomedical Applications
(2019-11-15)The present work analyzed the influence of an optical fiber laser surface treatment process on the tribological behavior of the ISO 5832-1 austenitic stainless-steel, basing on the wear volume and friction coefficient. ...