A5067149030- Biodiesel Production and Applications
- Lubricants and Their Additives
- biodegradable polymer synthesis and properties
- Anaerobic Digestion and Biogas Production
- Biofuel production and bioconversion
- Plant biochemistry and biosynthesis
- Edible Oils Quality and Analysis
- Process Optimization and Integration
- Artificial Intelligence in Healthcare
- Enzyme Catalysis and Immobilization
- Petroleum Processing and Analysis
- Spectroscopy and Chemometric Analyses
- Coconut Research and Applications
- Advanced Polymer Synthesis and Characterization
- Artificial Intelligence and Decision Support Systems
- Cassava research and cyanide
- Agricultural and Food Sciences
- Thermochemical Biomass Conversion Processes
- Innovative Microfluidic and Catalytic Techniques Innovation
- Heat transfer and supercritical fluids
- Advanced Energy Technologies and Civil Engineering Innovations
- Membrane Separation Technologies
- Genetics, Bioinformatics, and Biomedical Research
- Electromagnetic wave absorption materials
- Chemistry Education and Research
Universidade Federal do Rio Grande do Norte
2016-2023
Universidade Federal do Maranhão
2022-2023
National Institute of Science and Technology for Software Engineering
2020
Nanomaterials Research (United States)
2018
Instituto de Tecnologia e Pesquisa
2013
Universidade Federal da Bahia
2006
In this study, research was performed on the interesterification reaction of cotton oil with methyl acetate, using potassium methoxide as catalyst, in presence ultrasonic waves. order to obtain a better understanding process variables behavior, response surface methodology used along statistical methods. The experiments were molar ratio varying from 1:8 1:24, catalyst percentage 0.1 1.3% (weight), nozzle amplitude 30% 90% (180 540 W) and vibration pulse 50% 90%. Process optimized optimal...
A mathematical model of an isothermal semibatch bubble reactor has been developed to describe the esterification reaction free fatty acids with superheated alcohol vapor. The proposed accounts for effects mass transfer followed by chemical in liquid phase. fluid physical properties are calculated published correlations, and partition coefficient vapor was estimated based on thermodynamic models vapor–liquid equilibria. Experimental data acid-catalyzed oleic acid ethanol at different...
A semi-batch bubble reactor has been developed to produce fatty acid ethyl ester (biodiesel) by acid-catalyzed esterification of oleic with superheated ethanol vapor. In this paper, the effects reaction temperature (110, 130 and 150°C), volumetric flow rate (1.35, 2.50 3.65 mL/min) vapor size on performance were evaluated. The results demonstrated that have significant chemical reaction, gas phase solubility mass transfer limitations. addition, free conversion velocity was increased...
In the present study, transesterification of soybean oil with ethanol under supercritical conditions was investigated using a packed-bed tubular reactor. The experiments were performed an oil/alcohol molar ratio 1:40, pressure 15 MPa, and different temperature (573–673 K), flow rate (0.5–1.0 mL/min), bed porosity (0.32–1.0). A phenomenological model developed to describe analyze results. highest ester yield (98.99%) obtained for lower (0.32), 673 K 0.5 mL/min residence time 5.44 min. kinetic...
Oiticica is a feedstock with energetic potential for biofuel due to the presence of high oil content in its almond (54-60%). In this work, biodiesel from oiticica was produced by methyl transesterification using alkaline catalysts. Fatty acid ester (FAME) obtained at 32 °C, 1.5% KOH and 2h reaction time higher (92%) than that NaOH (85%). At temperature 50 no difference between catalysts found, both resulting conversion 91%. The best index 1% (0.40 mg g-1 °C) value viscosity (9.61 mm2 s-1)...
The present study aims to a system for the production of nano particles poly (methyl methacrylate) (PMMA) and polycaprolactone (PCL) based on atomization polymer solution in anti-solvent medium. In this system, solutions are prepared atomized form spray. droplets generated from come into contact with liquid that causes precipitation formation polymeric nanoparticles. study, experiments using proposed were performed under different operating conditions obtained analyzed by dynamic light...
In production lines for monitors and displays, some validation tests are based on visual inspection, whose preliminary step usually consists in detecting the area corresponding to a monitor's screen, which is then followed by evaluation procedures. Nonetheless, depending chosen technique, such detection may consume much of given test's total time. The present paper addresses mentioned problem presents an approach that uses semantic segmentation convolutional neural networks screen...
In the present study, we suggest that Myrciaria floribunda (West ex Willd.) O. Berg fruit (cambuí) is a natural source of potential molecules against COVID-19. Extracts from orange and purple cambuí were obtained by using pressurized hot water extraction (PHWE). Extraction overall yield was 39.66 ± 1.62% 33.00 8.44% for extracts cambuí, respectively. All analyzed showed high total phenolic contents, especially those fruits (3870.37 353.09 mg GAE/100g). The flavonoid content 693.16 180.09...
In this study, machine learning integrated based models for predicting cumulative biogas from anaerobic digestion (AD) of cassava wastewater were developed using artificial neural networks (ANNs). Biogas generation was investigated 21 days with and without the inclusion calcium particles milled calcined chicken waste as a low-cost substitute buffering. Digestion time, pH, concentration selected input features prediction through implementation ANN approach. Moreover, seven different training...
Abstract The search for new sources of energy requires more and interaction between the economical technological viabilities associated with social development, increasing, in this manner, interest raw materials that generate regional development. Thus, work analyzed viability ethyl esters production (biodiesel) from Gossypium hirsutum L . (cottonseed oil) without use a catalyst, continuous supercritical reactor. reactions occurred at tubular reactor, under 15 MPa 20 pressure, reaction time...