A5009767568- Biodiesel Production and Applications
- Lubricants and Their Additives
- Thermochemical Biomass Conversion Processes
- Thermal and Kinetic Analysis
- Chalcogenide Semiconductor Thin Films
- Catalysis and Hydrodesulfurization Studies
- Enzyme Catalysis and Immobilization
- Semiconductor materials and interfaces
- Catalysis for Biomass Conversion
- Semiconductor Quantum Structures and Devices
- Advanced oxidation water treatment
- Subcritical and Supercritical Water Processes
- Advanced Combustion Engine Technologies
- Zeolite Catalysis and Synthesis
- Water Quality Monitoring and Analysis
- Catalytic Processes in Materials Science
- Quantum Dots Synthesis And Properties
- Silicon and Solar Cell Technologies
- Petroleum Processing and Analysis
- Advanced Semiconductor Detectors and Materials
- Catalysts for Methane Reforming
- Plant biochemistry and biosynthesis
- Glass properties and applications
- Integrated Circuits and Semiconductor Failure Analysis
- Heat transfer and supercritical fluids
Universidad de Extremadura
2012-2024
Universidad de Santiago de Chile
2024
University of the Andes
1988-2017
Centro de Implantología Cirugía Oral y Maxilofacial
1989-2011
Centro de Investigación y Desarrollo
1998-2011
Instituto de Química Orgánica General
2008
University of America
2004
Catholic University of America
2004
Universidad Complutense de Madrid
1988-2002
George Mason University
2002
A study was performed of the transesterification reaction used frying oil by means methanol, using sodium hydroxide, potassium methoxide, and methoxide as catalysts. The objective work to characterize methyl esters for use biodiesels in compression ignition motors. operation variables were methanol/oil molar ratio (3:1−9:1), catalyst concentration (0.1−1.5 wt %), temperature (25−65 °C), type. Also, experiments two stages reaction, with separation glycerol first stage, carried out. evolution...
A study was made of the transesterification reaction Cynara cardunculus L. oil by means ethanol, using sodium hydroxide and potassium as catalysts. The objective work to characterize ethyl esters for use biodiesels in compression ignition motors. operation variables employed were temperature (25−75 °C), catalyst type (sodium hydroxide), concentration (0.25−1.5 wt %), ethanol/oil molar ratio (3:1−15:1). Oil mass (200 g), time (120 min), alcohol (ethanol) fixed common parameters all...
Biodiesel and other derivative compounds which could act as biolubricants, can be a suitable alternative for petroleum products, are less sustainable harmful to the environment. However, especially when vegetable oils used raw materials (for instance Carthamus Tinctorius), these products show poor oxidative stabilities, depending on their fatty acid composition. Apart from adding antioxidants additives, good might use of genetically modified seeds facilitate high ratios stable acids like...
A study was made of the reaction transesterification Cynara cardunculus L. oil by means methanol, using sodium hydroxide, potassium and methoxide as catalysts. The objective work to characterize methyl esters for use biodiesels in internal combustion motors. operation variables used were methanol concentration (5−21 wt %), catalyst (0.1−1 temperature (25−60 °C). evolution process followed gas chromatography, determining at different times. biodiesel characterized its density, viscosity, high...
The objective of this work was to study the acceleration that ultrasound causes in rate biodiesel transesterification reactions. effect different operating variables, such as power, catalyst (KOH) concentration and methanol:oil molar ratio, studied. evolution process followed by gas chromatography, determining methyl esters at reaction times. characterized its density, viscosity, saponification iodine values, acidity index, water content, flash combustion points, cetane index cold filter...
Biodiesel is gaining more and importance due to environmental issues. This way, alternative sustainable crops as new biofuel sources are demanded. Safflower could be a raw material for biodiesel production, showing one disadvantage (as many biodiesels from vegetable oils), that is, short oxidative stability. Consequently, the use of antioxidants increase this parameter mandatory. The aim research work was assess effect two (butylated hydroxyanisole, BHA, tert-butylhydroquinone, TBHQ) on...
The transesterification of rapeseed and castor oil methyl esters with different alcohols (2-ethyl-1-hexanol, 1-heptanol 4-methyl-2-pentanol) titanium isopropoxide as a catalyst, to produce biolubricants, was carried out. Parameters such temperature, alcohol/methyl ester molar ratio, catalyst concentration were studied optimize the process. reaction evolution monitored decrease in FAME by gas chromatography. In general, almost complete two hours, obtaining over 93% conversions. All variables...
Abstract A study about the production and characterization of biodiesel and, especially, biolubricants from different raw materials (ie, rapeseed, a mixture corn sunflower, frying oils) is here performed. Optimal chemical conditions were used to carry out transesterification biolubricants, hence obtaining high yields in all investigated cases. The physical properties, such as fatty acid methyl ester profile, viscosity, viscosity index oxidative stability, among others, are analyzed. products...
The pyrolysis of almond shells residues were studied in nitrogen atmosphere a laboratory fixed bed reactor. influence the temperature (300−800 °C) and heating rate (5−20 K min-1) on composition properties different fractions analyzed. As was increased decrease char yield an increase gas observed. oil fraction passed through maximum at temperatures between 400 500 °C. decline higher likely due to strong cracking, which yield. leads slight yields production varied ranges 21.5 47.3% for char,...