A5077601627- Phase Equilibria and Thermodynamics
- Process Optimization and Integration
- Biodiesel Production and Applications
- Chemical Thermodynamics and Molecular Structure
- Thermodynamic properties of mixtures
- Subcritical and Supercritical Water Processes
- Ionic liquids properties and applications
- Enzyme Catalysis and Immobilization
- Essential Oils and Antimicrobial Activity
- Chemical and Physical Properties in Aqueous Solutions
- Analytical Chemistry and Chromatography
- Polymer Foaming and Composites
- Carbon Dioxide Capture Technologies
- Petroleum Processing and Analysis
- Adsorption, diffusion, and thermodynamic properties of materials
- Lubricants and Their Additives
- Catalysis and Oxidation Reactions
- Advanced Combustion Engine Technologies
- Biochemical and biochemical processes
- Innovative Microfluidic and Catalytic Techniques Innovation
- Microbial Metabolic Engineering and Bioproduction
- Phytochemicals and Antioxidant Activities
- Catalysts for Methane Reforming
- Cultural Heritage Materials Analysis
- Thermal and Kinetic Analysis
Universidade Estadual de Maringá
2014-2023
Universidade Federal do Rio de Janeiro
2001-2008
Abstract New data on phase equilibria for Sacha inchi seed oil in carbon dioxide have been measured using a variable volume cell system at temperatures of 303, 313 and 323 K pressures ranging from 4.3 to 27.7 MPa. The CO 2 mole fraction varied 0.7488 0.9997. At the studied concentrations, transitions vapor‐liquid, liquid‐liquid‐vapor liquid‐liquid were observed. contains 47% omega‐3 fatty acids, with ratio 0.76:1 omega‐6:omega‐3, which is good human health. Peng‐Robinson equation state was...
This work presents new experimental phase equilibrium data for mitotane in supercritical CO2 and mitone plus ethanol. The synthetic-static method a high-pressure variable-volume view cell was used to measure the solid–fluid (SF) fluid–fluid (FF) data. experiments were carried out temperature range from (298 333) K pressure (3.44 21.84) MPa. Peng–Robinson equation of state (PR-EoS) describing fluid phases, an expression fugacity pure solid representing phase. made it possible model SF FF +...
Calophyllum brasiliense is a rich source of bioactive coumarins, xanthones and biflavonoids. The aim the study was to compare phenol contents antioxidant activity C. extracts obtained by conventional supercritical fluid extraction (SFE) methods, as well quantification crude (−)-mammea A/BB yields. Dichloromethane hexane were used solvents for extractions SFE developed using CO2; kinetic curves modeled second-order empirical model. dichloromethane extract presented best total yield, although...
This work presents computational steady-state simulations of fatty acid esters (biodiesel) production in a reactive distillation column. Reaction rates were considered explicitly the model each stage. The procedures and formulation used here initially validated by comparison results obtained this with data available literature. Two new cases for are simulated. In both them, conversions close to 99% possible proper choice operating conditions, as shown sensitivity analyses. can be useful...
In the present study, transesterification of Jatropha oil in a continuous catalyst-free process using supercritical ethanol was investigated. Experiments were performed packed-bed tubular reactor by studying effect on reaction temperature, pressure, water and cosolvent (n-hexane) concentrations, keeping oil:ethanol mass ratio fixed at 1:1 for different residence times. The results demonstrated that temperature pressure had positive fatty acid ethyl ester (FAEE) production it observed free...
A 2 4 factorial design of experiments complemented with a central point was performed to examine the influence operating factors on color strength and fastness polyethylene terephthalate (PET) fibers dyed Disperse Orange 30 dye in supercritical CO . The effects temperature, pressure, dyeing time mass ratio between PET introduced chamber ( α ratio) were considered. An additional set kinetic results obtained at optimum condition terms pressure already presented temperatures ratios. significant...
Biodiesel conventional production process, by alkaline transesterification reaction, have disadvantages such as complex products separation and high feedstock costs. In this regard, of biodiesel esterification fatty acids into a reactive distillation column has proved to be promising for overcoming some these drawbacks. However, only simulation works that consider one type acid reagent are available in the literature, not simulations based on real material process. way, work presents...
Vapor–liquid equilibrium (VLE) of acrylonitrile and the solubility p-bromobenzaldehyde in compressed and/or supercritical carbon dioxide were measured using a synthetic static method with variable-volume cell front sapphire window for visualization phase transitions. For CO2 + acrylonitrile, bubble point (BP) dew (DP) verified at temperatures ranging from (303 to 333) K pressure up 100 bar. p-bromobenzaldehyde, solid−fluid (SF) transitions same over range (90 135) The experimental data...