نتایج جستجو برای: transesterification reaction efficiency

تعداد نتایج: 788194  

2016

There has been great emphasis on the use of biodiesel due to worldwide scarcity of fossil fuels, increasing crude oil prices and environmental concerns to reduce pollution. Production of biodiesel from biologically derived oils involves transesterification of these triglycerides with short chain alcohols to yield alkyl esters of fatty acids. These can be used in engines which are having compres...

2015
Mohd Zan Arniza Seng Soi Hoong Zainab Idris Shoot Kian Yeong Hazimah Abu Hassan Ahmad Kushairi Din Yuen May Choo

Transesterification of palm olein with glycerol can increase the functionality by introducing additional hydroxyl groups to the triglyceride structure, an advantage compared to using palm olein directly as feedstock for producing palm-based polyol. The objective of this study was to synthesize transesterified palm olein-based polyol via a three-step reaction: (1) transesterification of palm ole...

2013
Paula Berman Adi Leshem Oren Etziony Ofer Levi Yisrael Parmet Michael Saunders Zeev Wiesman

Background: Biodiesel production has increased dramatically over the last decade, raising the need for new rapid and non-destructive analytical tools and technologies. H Low Field Nuclear Magnetic Resonance (LF-NMR) applications, which offer great potential to the field of biodiesel, have been developed by the Phyto Lipid Biotechnology Lab research team in the last few years. Results: Supervise...

2013
Paula Berman Adi Leshem Oren Etziony Ofer Levi Yisrael Parmet Michael Saunders Zeev Wiesman

BACKGROUND Biodiesel production has increased dramatically over the last decade, raising the need for new rapid and non-destructive analytical tools and technologies. 1H Low Field Nuclear Magnetic Resonance (LF-NMR) applications, which offer great potential to the field of biodiesel, have been developed by the Phyto Lipid Biotechnology Lab research team in the last few years. RESULTS Supervis...

Journal: :International Journal of Energy Research 2023

Biodiesel is a promising alternative to petrodiesel, but its production from acid oils retains several technical challenges. Therefore, this study developed new approach involving 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)-catalyzed one-pot reaction (simultaneous esterification-transesterification) produce biodiesel with enhanced efficiency. The was performed under water removal conditions and op...

Journal: :Biotechnology for biofuels 2015
Jiao Liu Yadong Chu Xupeng Cao Yuchao Zhao Hua Xie Song Xue

BACKGROUND Fatty acid composition is an important physiological parameter of microalgae, which is taken as the third generation alternative resource of biodiesel. To boost microalgal research and applications, a convenient, rapid, and acid-catalyzed transesterification procedure that satisfies the demand for the analysis of the fatty acid composition of lipids with micro-scale samples in the hi...

Journal: :The Journal of organic chemistry 2014
Nicola Caldwell Peter S Campbell Craig Jamieson Frances Potjewyd Iain Simpson Allan J B Watson

A catalytic protocol for the base-mediated amidation of unactivated esters with amino alcohol derivatives is reported. Investigations into mechanistic aspects of the process indicate that the reaction involves an initial transesterification, followed by an intramolecular rearrangement. The reaction is highly general in nature and can be extended to include the synthesis of oxazolidinone systems...

Journal: :Bioresource technology 2016
Suzana Wahidin Ani Idris Sitti Raehanah Muhamad Shaleh

The wet biomass microalgae of Nannochloropsis sp. was converted to biodiesel using direct transesterification (DT) by microwave technique and ionic liquid (IL) as the green solvent. Three different ionic liquids; 1-butyl-3-metyhlimidazolium chloride ([BMIM][Cl], 1-ethyl-3-methylimmidazolium methyl sulphate [EMIM][MeSO4] and 1-butyl-3-methylimidazolium trifluoromethane sulfonate [BMIM][CF3SO3]) ...

2000
Gerhard Knothe

Biodiesel is a promising alternative diesel fuel obtained from vegetable oils, animal fats, or waste oils by transesterifying the oil or fat with an alcohol such as methanol. In an extension of previous work, fiber-optic near infrared spectroscopy was used to quantitatively monitor the transesterification reaction (6-L scale) of a vegetable oil (soybean oil) to methyl soyate. The results were c...

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