A5077340852- Biodiesel Production and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Lubricants and Their Additives
- Organometallic Complex Synthesis and Catalysis
- Catalysis and Hydrodesulfurization Studies
- Asymmetric Hydrogenation and Catalysis
- Carbon dioxide utilization in catalysis
- Organometallic Compounds Synthesis and Characterization
- Free Radicals and Antioxidants
- Environmental Chemistry and Analysis
- Catalysis and Oxidation Reactions
- Crystallography and molecular interactions
- Enzyme Catalysis and Immobilization
- Phytochemicals and Antioxidant Activities
- Thermal and Kinetic Analysis
- Metal complexes synthesis and properties
- Lignin and Wood Chemistry
- Catalysis for Biomass Conversion
- Plant biochemistry and biosynthesis
- Water Quality and Pollution Assessment
- Algal biology and biofuel production
- Edible Oils Quality and Analysis
- Petroleum Processing and Analysis
- Analytical Chemistry and Sensors
Universidade Federal do Piauí
2010-2023
Universidade de São Paulo
2015
Universidade Federal de Alfenas
1999-2003
Universidade Federal de Minas Gerais
1999-2003
The antioxidant activity of curcumin and β-carotene was studied as a method to control the oxidative process methyl soybean biodiesel during 180-day storage period. Initially, against radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) tested. Curcumin reduced concentration DPPH by 90% whereas it 15%. determined through both Rancimat Petro-OXY methods. Results obtained from two methods were consistent. They showed that increased induction period 83%, indicating potential use this on an industrial...
BIODIESEL FROM BABASSU (Orbignya sp.) SYNTHESIZED VIA ETHANOLIC ROUTE.Biodiesel was obtained by transesterification of babassu oil in anhydrous ethanol and methanol, employing NaOH as catalyst.The products were characterized physico-chemical thermogravimetric analysis.It could be concluded that the properties two types biodiesel (ethanolic methanolic) are very similar when compared with diesel oil.
Brazil has great energy potential for the production of biodiesel, due to its size and variety climates with many regions pastures because it is one greatest exporters bovine meat world. Beef tallow a raw material presenting an efficient transesterification easy separation phases. In this work, by homogeneous catalysis solution methanolic KOH was carried out means heating preliminary formation microemulsion. study, biodiesel obtained characterized physicochemical Norms ANP 07/2008. Fatty...
The presence of K<sub>2</sub>CO<sub>3</sub> significantly increased the catalytic activity and stability Au NPs supported on magnesium oxide-based supports.
Este trabalho descreve a preparação de biodiesel proveniente óleo babaçu, mamona e misturas destes em várias proporções, utilizando compostos alcalinos estrôncio (SrO + SrCO 3 Sr(OH) 2 ) como catalisadores heterogêneos.A mistura óleos dessas oleaginosas foi utilizada na produção com parâmetros qualidade que atendam legislação vigente.O catalisador caracterizado por difratometria raios X (XRD), fisissorção gas (método BET), microscopia eletrônica varredura (SEM), espectroscopia dispersão...
This paper investigates the transesterification of babassu oil to biodiesel in a fixed-bed reactor using strontium oxide (SrO) as catalyst. Under room temperature, atmospheric pressure, and 100 g initial feeding, conversion reached almost 100% after 3 h 1.5 SrO. result shows promising commercially viable path produce biodiesel. In terms technical quality, it was found that reaction time is key issue rather than amount catalyst use. addition, thermogravimetric analysis (TGA) method accurate...
In this work, it was described the preparation and characterization of a solid acid catalyst obtained by mixture Cr/Al oxides (CRAL).The tested in transesterification reaction babassu oil with 5% free fatty (FFA).The results textural acidity characteristics CRAL were: area (56 m 2 g -1 ), pore size (7.0 µm), total (182.28 µmol wherein Brönsted sites are most active.Powder X-ray diffractometry (XRD), scanning electron microscopy (SEM) energy-dispersive spectroscopy (EDX) show three phases (Cr...
USING THE FAAS.This work proposed a procedure to examine ashes produced in burning lubricating oils used public transportation, Teresina PI.Sulphanilic acid was added the oil samples, which were burned at 550 °C for three hours and 650 two hours.The ash solutions analyzed by FAAS there significant differences metal contents of waste from normal car service.The quantification limits µg g -1 5.9 (Fe), 4.4 (Pb), 1.7 (Ni), 2.1 (Cu), 1.2 (Zn).The results showed positive accuracy precision with...
Glycerol, a by-product from biodiesel production can react with di-carboxylic organic acids, resulting in polyesters, and be used the composition of urea/formaldehyde or phenol/formaldehyde resins to improve qualities adhesion moisture resistance them. In this work, six kinds derived glycerol, named as GAA (glycerol/adipic acid), GAAU acid/urea), GAF (glycerol/phtalic GU (glycerol/urea), GUF (glycerol/urea/formaldehyde) GF (glycerol/formaldehyde), were synthesized. The carboxylic acids had...
Oleaginous plants typical of the Brazilian northeast can be used in technological applications.With growing demand for alternative sources energy, such as biodiesel, study oils these oleaginous have clear appeal.The purpose this work is extracting babassu and jatropha oils, well physicochemical, chemical thermochemical characterization vegetable babassu, buriti, macaw curcas.Only were extracted by Soxhlet method.The buriti macaúba received already extracted.The physico-chemical...
CONTAMINED BY THESE LUBRICANTS.A simple and reliable ashing procedure is proposed for the preparation of used lubricating oil samples determination Zn, Fe, Pb, Ni Cu by flame atomic absorption spectrometry technique.Sulphanilic acid was added to samples, mixture coked coke ashed at 550 o C. The solutions ash were analysed AAS these metals.The quantification limits 38.250 µg g -1 4.550 1.562 1.450 Ni, 0.439 Cu.The determinations, in oil, showed good precision accuracy with recoveries between...
Phosphine substitution reactions between (η5-C5H5)Ru(PPh3)2Cl (1) and 1,2-bis(diphenylphosphino)ethane (Ph2P(CH2)2PPh2, dppe), in refluxing benzene or toluene at 80°C afforded a mixture of complexes where dppe behaves both as bridging chelating ligand. CpRu(η2-dppe)Cl (2) {[CpRu(Cl)]2(η2,μ2-dppe)2} (3) were separated by fractional precipitation from the reaction mother-liquor, characterized 1H, 13C, 31P NMR, elemental analysis IR spectroscopy. The (2):(3) ratio composition product was found...