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Showing 1 to 20 of 76 for “"transesterification"”.
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Monitoring of Biodiesel Transesterification Process Using Impedance Measurement
… rise to reduced exhaust gas emissions. The transesterification process has been commonly and widely used to produce biodiesel from vegetable oil or animal fat. Vegetable oils or animal fats generally have viscosities higher than standard diesel oil. This means that it is necessary to reduce …
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BIODIESEL PRODUCTION THROUGH MICROWAVE ASSISTED TRANSESTERIFICATION OF MICROBIAL CELLS
… lipid and produce biodiesel through in-situ transesterification. Firstly, the yeast growth with crude glycerol was studied. When cultured in a one-stage fed-batch process wherein crude glycerol and nitrogen source were fed intermittently for 12 days, the final biomass density and lipid …
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The effect of interchain transesterification reactions on the development of aromatic copolyesters
Aromatic copolyesters (LCPs) have been a subject of extensive research effort over the past 30 years. This is due primarily to their unique combination of properties and processability. They are limited, however, due to high temperatures required for processing and limitations on achievable …
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Development of aromatic polyesters for high performance applications and use of interchain transesterification reactions as a solid-state fabrication tool
… temperatures of up to 320°C that interchain transesterifications (ITR - a class of solid state chemical reactions available to aromatic polyesters) are responsible in part for low wear rates via ATSP reincorporating its own wear debris and development of a stable transfer film. Additionally, …
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Desenvolvimento de catalisador heterogêneo para produção de biodiesel a partir do óleo de algodão
… synthesized by impregnation method with MgO. The transesterification is influenced by the properties of the oil used, so cottonseed oil passed the tests acid value, moisture content and the saponification index showing the acidity value a little above the 2 mg KOH / g of oil, as well as the …
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Production and purification of fatty acid methyl esters from plant oils of different origin
… obtained from vegetable oils or animal fats by a transesterification reaction whereby the triglycerides, contained in the oil or fat, react with a short chain alcohol in the presence of a catalyst. The products of the reaction are fatty acid methyl esters (biodiesel) and glycerol, obtained as two …
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Enhancing biodiesel production from soybean oil using ultrasonics
… to produce fatty acid alkyl esters is known as transesterification. The transesterification process, facilitated by mechanical mixing, is commercially used to produce biodiesel.</p> <p>In industry, biodiesel is characterized using proton nuclear magnetic resonance spectroscopy (1H NMR …
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Development of Biolubricants from Vegetable Oils for Non-Internal Combustion Engine Applications
… (TMP) esters through a two-step transesterification-transesterification and a two-step hydrolysis-esterification process. To further increase the thermal and oxidative stability, an epoxidation reaction was performed in order to remove the C=C double bonds in the canola oil …
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Continuous Production of Palm Methyl Esters With Recovery of Carotenoids Using Membrane Technology
… palm oil into methyl esters through continuous transesterification followed by separation of the carotenoids from the esters using membrane technology. Reaction temperature affected significantly the batch transesterification of palm oil primarily in its initial stages. The optimum temperature …
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Multistage methanolysis of crude palm oil for biodiesel production in a pilot plant
… of the crude palm oil under a base catalyst (transesterification) to produce biodiesel at high quality and maximum yield. The concentration profiles of the reactants and the products employed in the transesterification are obtained by solving numerically the associated differ�ential equations …
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Catalytic synthesis of biodiesel fuel under sub/supercritical conditions: kinetics and phase behavior
<p>In this thesis, transesterification of triglycerides and esterification of free fatty acids were executed under subcritical and supercritical alcohol conditions, and discussed in Chapter 2-5. The project was initiated by studying the phase behavior and kinetics of transesterification reactions …
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Copolymerisation of polyesters using reactive extrusion
… PET waste with polycaprolactone (PCL) through transesterification to create an economical, sustainable, and degradable copolymer over PBAT. Ti(OBu)4 emerged as an ideal catalyst for inducing rapid transesterification through the insertion-coordination mechanism, forming homogenous copolymers …
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Advancing Step-Growth Polymers: Novel Macromolecular Design and Electrostatic Interactions in Polyesters and Polyurethanes
Conventional melt transesterification successfully synthesized high molecular weight segmented copolyesters. The cycloaliphatic monomers 2,2,4,4-tetramethyl-1,3-cyclobutanediol (CBDO) and dimethyl-1,4-cyclohexane dicarboxylate (DMCD) afforded sterically hindered, ester carbonyls in high-Tg …
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Platinum promotion in supported gold catalysts for glycerol oxidation
… to be a viable option. It is obtained by the transesterification of triglycerides, with glycerol as the main coproduct. Approximately 100kg of glycerol is formed per ton of biodiesel produced.
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Eggshell catalyst assisted palm biodiesel production for blending of B10 blended diesel fuel
… to assist the palm biodiesel production through transesterification method. The transesterification method consists of varying parameters of molar ratios (9:1, 12:1 and 15:1) and catalyst content (2%, 3% and 4%), with fixed parameters of 65°C reaction temperature and 600rpm stirring speed. Nine …
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A study of the mechanical properties and the equilibrium nature of the blend of thermotropic liquid crystalline copolyesters
… multiple peaks was attributed to the incomplete transesterification reaction in the extruder. The OMA results also indicated a substantial decrease in the melting temperatures with the increase in the number of extruder passes. A similar decrease in the melting temperatures has been reported in …
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Microalgal Biodiesel Production through a Novel Attached Culture System and Conversion Parameters
… is created through a chemical reaction known as transesterification, alcoholysis, or commonly, methylation, when methanol is the alcohol used. There are several different transesterification methods. By simplifying the reaction conditions and examining the effects in terms of maximum fatty acid …
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Harvesting natural algal blooms for concurrent biofuel production and hypoxia mitigation
… liquefaction (HTL), anaerobic digestion (AD), transesterification and fermentation, were compared in the model. Hydrothermal liquefaction and anaerobic digestion are generally more favorable in terms of energy production because they process a larger portion of the algal cell and require less …
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Characterization of Value Added Proteins and Lipids form Microalgae
… microalgae. This promising process, in situ transesterification, led to better yields of methyl esters as compared to conventional lipid extraction followed by separate transesterification.
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