Search results for "Acid value"

showing 2 items of 2 documents

Renewable polyol obtained by microwave-assisted alcoholysis of epoxidized soybean oil: Preparation, thermal properties and relaxation process

2019

[EN] The soybean oil polyol (SOP) use as feedstock in the polyurethane industry has been recently emphasized due to its excellent resistance to hydrolysis, which is also applicable in coatings and thermal insulation. In this article, the SOP was obtained by a very fast microwave-assisted alcoholysis of epoxidized soybean oil (ESO). The preparation method, thermal properties, and relaxation process were evaluated. High yields as opening and consumption epoxy group and selectivity of 99.8 mol%, 985 mol%, and 71.2 mol% were obtained. Through titrations, nuclear magnetic resonance and gel permeation chromatography were identified parameters as 0.32 mg KOH.g(-1) acid number, 190 mg KOH.g(-1) hyd…

Acid valuefood.ingredientMaterials scienceThermal properties02 engineering and technologyDielectric relaxation spectroscopy010402 general chemistry01 natural sciencesSoybean oilGel permeation chromatographychemistry.chemical_compoundfoodMaterials Chemistry13.- Tomar medidas urgentes para combatir el cambio climático y sus efectosPhysical and Theoretical ChemistrySoybean oil polyolSpectroscopyPolyurethane021001 nanoscience & nanotechnologyCondensed Matter PhysicsAtomic and Molecular Physics and Optics0104 chemical sciencesElectronic Optical and Magnetic Materials02.- Poner fin al hambre conseguir la seguridad alimentaria y una mejor nutrición y promover la agricultura sostenibleEpoxidized soybean oil08.- Fomentar el crecimiento económico sostenido inclusivo y sostenible el empleo pleno y productivo y el trabajo decente para todos12.- Garantizar las pautas de consumo y de producción sostenibles07.- Asegurar el acceso a energías asequibles fiables sostenibles y modernas para todosChemical engineeringchemistryHydroxyl valueMAQUINAS Y MOTORES TERMICOS0210 nano-technologyGlass transitionMicrowave-assisted alcoholysisSaponification
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Nano-magnetic potassium impregnated ceria as catalyst for the biodiesel production

2019

Abstract The main objective of this work comprises the investigation of biodiesel production from rapeseed oil using potassium impregnated Fe3O4-CeO2 nanocatalyst. The various concentration of potassium impregnated Fe3O4-CeO2 was screened for catalytic conversion of rapeseed oil to triglyceride methyl ester. The 25 wt % potassium impregnated Fe3O4-CeO2 nanocatalyst showed best biodiesel production. Nanocatalyst was characterized by FTIR, XRD, SEM, TEM, BET and Hammett indicator for basicity test. The characterization of biodiesel was performed with GC-MS, 1H and 13C NMR. Moreover, the optimum reaction parameters such as catalyst amount (wt %), oil to methanol ratio, reaction time and reacti…

Acid valuekasviöljyt020209 energyPotassiumchemistry.chemical_elementbiodiesel02 engineering and technologyrapeseed oilCatalysischemistry.chemical_compoundkatalyytit0202 electrical engineering electronic engineering information engineering0601 history and archaeologyta116ta215ta218Biodiesel060102 archaeologyRenewable Energy Sustainability and the Environment06 humanities and the artsTransesterificationtransesterificationchemistryYield (chemistry)Biodiesel productionoksiditnanohiukkasetMethanolFe3O4-CeO2 nanocatalystrapsiöljyNuclear chemistryRenewable Energy
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