A5059054404- Catalysis for Biomass Conversion
- Supercapacitor Materials and Fabrication
- Biodiesel Production and Applications
- Catalysis and Hydrodesulfurization Studies
- Enzyme Catalysis and Immobilization
- Layered Double Hydroxides Synthesis and Applications
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Biofuel production and bioconversion
- Electrocatalysts for Energy Conversion
- Aerogels and thermal insulation
- Minerals Flotation and Separation Techniques
- biodegradable polymer synthesis and properties
- Hydrogels: synthesis, properties, applications
- Advanced Cellulose Research Studies
- ZnO doping and properties
- Nanomaterials for catalytic reactions
- Fuel Cells and Related Materials
- Crystallization and Solubility Studies
- Subcritical and Supercritical Water Processes
- Nanoporous metals and alloys
- Lubricants and Their Additives
- Calcium Carbonate Crystallization and Inhibition
- Transition Metal Oxide Nanomaterials
- Inorganic Fluorides and Related Compounds
Universidade Federal do Ceará
2014-2024
Universidade Federal do Maranhão
2016-2024
Abstract The blending ratio of biodiesel in petroleum diesel has become one the most important parameters to ensure quality diesel/biodiesel blend. This paper presents a fast and simple method based on electrochemical impedance spectroscopy determine content fuel. Different from reported literature, using pair two identical screen printed carbon paste electrodes, present work we used electrodes made 304 stainless steel with dimensions 0.8×0.3 cm for EIS measurements. Improved results were...
A new approach for MgAl LDH modification after rehydration and poisoning with acetic acid is presented. Its tuned basicity favored the selectivity to glycerol oligomers improved catalyst recycling, up 3 cycles.
The scale inhibitor squeeze treatment is an important method used in the petroleum industry to control formation of inorganic deposition within oil production wells. This increases life cycle by preventing or reducing and growth salt crystals. In recent years, studies on treatments have been expanding diversifying with goal improving lifespan costs. study reports advanced bibliometric analysis from 1970 2023, illustrating extent research prevent scale, a systematic survey since first...
O Biodiesel é um combustível renovável derivado de óleos vegetais ou gordura animal que pode substituir total parcialmente o óleo diesel petróleo. Possui algumas vantagens quando comparado ao fóssil tais quais biodegrabilidade e não toxicidade. A transesterificação com álcool cadeia curta catalisadores básicos a forma mais usual produção desse combustível. Otimizar proporção catalisador empregados na reação importante do ponto vista técnico econômico, possibilitando identificar as...
Abstract This study systematically evaluates fluorine‐containing materials with varying compositions of K, Al, Co, Cu, Mg, and Zn as catalysts for glycerol oligomerization. Comprehensive analyses were conducted all the catalysts, considering their structural, compositional, morphological characteristics, basicity, to understand them in greater depth. Among these analyses, gas chromatography was employed examine composition reaction products. The investigation extended a recycling under...
This research consolidates our group's advances in developing a therapeutic dressing with innovative enzymatic debridement, focusing on the physicochemical and vitro biological properties of papain immobilized wet oxidized bacterial cellulose (OxBC-Papain) dressing. OxBC membranes were produced
In the face of current energy and environmental challenges, electrochemical storage devices emerge as a promising solution. Specifically, supercapacitors are highly valued for their exceptional ability to deliver rapid responses exhibit high-power capabilities. Although rare-earth compounds have received less attention in field, utilization nanotechnology tools allows precise manipulation shape size, which opens new possibilities developing novel configurations with improved properties,...
O glicerol é o principal subproduto da indústria de biodiesel e também uma matéria-prima muito versátil, podendo ser utilizado na produção produtos químicos, polímeros combustíveis. Recentemente vários autores têm relatado a conversão em ácido lático, um importante composto com ampla aplicação química, farmacêutica alimentícia. Neste trabalho foi possível sintetizar caracterizar catalisador paládio suportado carbono ativado (Pd/C) verificar seu desempenho reação lático. Através técnica...
Este trabalho tem como objetivo avaliar o uso da dolomita calcinada catalisador na reação de oligomerização do glicerol. Inicialmente, material foi submetido a calcinação por 2 horas 800ºC. As reações catalisadas pela foram conduzidas em Reator Parr, utilizando glicerol P.A, sob fluxo nitrogênio, aquecimento 245ºC e tempo 6 horas. Para fins comparativos também realizou-se um teste sem presença catalisador. Testes reológicos evidenciaram redução viscosidade dos produtos obtidos via processo...
Este trabalho objetiva avaliar catalisadores básicos homogêneos na reação de oligomerização do glicerol. As reações foram processadas em reator batelada, utilizando-se glicerol P.A e NaOH ou CaO como catalisadores. ocorreram com fluxo nitrogênio, a 245ºC duração 6 horas. Para fins comparativos, também realizou-se um teste sem catalisador. A caracterização via infravermelho evidenciou redução acentuada pico característico grupo OH, para catalisada por NaOH, bem possível formação acroleína. Os...
Herein, we investigated CeVO4 nanostructures synthesized using a microwave-assisted hydrothermal method, focusing on their structural and electrochemical properties for potential supercapacitor applications. Notably, the selected synthesis method yielded material that displays lattice spacing consistent with (200) plane of tetragonal structure, as confirmed by high-resolution transmission electron microscopy corroborated X-ray diffraction analysis. In addition, EDX spectroscopy demonstrated...