Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 267 for “"Biodiesel"”.
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Biodiesel production from coconut oil
Biodiesel production processes using coconut oil containing a relatively high content of free fatty acids (4.5% w/v and higher) have been characterized using alkali, acid and enzymatic- based catalysts. The use of ethanol (molar ratio of 3:1 of ethanol:triglycerides) instead of methanol was …
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Improvements to the biodiesel process
Biodiesel (fatty acid methyl ester, FAME) is a renewable diesel fuel made from vegetable oil and methanol. The two main problems with the process are disposal of waste streams and product purity. This thesis studies biodiesel process improvements, especially glycerol conversion to hydrogen and …
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Characterisation of biodiesel from Litsea glutinosa
Submitted in complete fulfillment for the Degree of Master of Technology: Biotechnology, Durban University of Technology, Durban, South Africa, 2014.
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Modeling the Production of Microalgal Biodiesel
… the Production of Microalgal Biodiesel</p><p>by</p><p>Mark Henson</p><p>Doctor of Philosophy in Energy, Environmental and Chemical Engineering</p><p>Washington University in St. Louis, 2013</p><p>Professor Pratim Biswas, Chair</p><p>Biodiesel produced from microalgal lipids is …
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Biofuels from lignin and novel biodiesel analysis
… the various types of hydroxyl groups present in biodiesel production streams. In the first study, the use of 2-chloro-4,4,5,5-tetramethyl-1,3,2-dioxaphospholane as a phosphitylation reagent for quantitative ³¹P-NMR analysis of the hydroxyl groups in biodiesel process samples has been developed. …
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Mechanical algal disruption for efficient biodiesel extraction
Biodiesel from algae provides several benefits over current biodiesel feedstocks, but the energy requirements of processing algae into a useable fuel are currently so high as to be prohibitive. One route to improving this is via disruption of the cells prior to lipid extraction, which can …
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Optimising microalgal lipid productivity for biodiesel production
… deprivation that optimise lipid productivity for biodiesel production. This was carried out by I) developing the tools necessary to measure lipid productivity accurately, II) identifying and quantifying the key characteristics of promising microalgal strains, initially through a literature survey …
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Monitoring of Biodiesel Transesterification Process Using Impedance Measurement
… Fatty acid methyl ester (FAME) based Biodiesel manufactured from vegetable oils or animal fats is an excellent candidate to replace common diesel fuel being renewable, non-toxic and often giving rise to reduced exhaust gas emissions. The transesterification process has been commonly …
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Computational and Experimental Investigations on Biodiesel Combustion Process
… The computational prediction has also shown that biodiesel produces a marginally higher rate of COx compared to diesel which was also observed experimentally using a Compression Ignition Engine (CIE). Having said so, the experimental work also showed that surrogate fuels perform far better than …
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MODELING AND OPTIMIZATION OF BIODIESEL REACTOR AND FEEDSTOCK
Biodiesel is a non-toxic, biodegradable, and environmentally benign fuel that can be directly used in a diesel engine. Although it has shown promise, the higher production cost of biodiesel compared to that of petroleum-based diesel poses a major hurdle in its development with the cost of feedstock …
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Novel supercritical biodiesel plant design & process scale-up
… efficient advanced fuels choices. In this study, biodiesel processing, and a novel design for next generation biodiesel plants are explored. During a National Science Foundation (NSF) I-Corps project we identified three creative and profitable improvements to the process: 1. Incorporating Energy …
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Enhancing biodiesel production from soybean oil using ultrasonics
<p>Biodiesel, or fatty acid alkyl ester, is a non-toxic, biodegradable and renewable source of energy. It is mostly produced from vegetable oils. Other sources include animal fat, oils obtained from algae, fungi, bacteria, etc. Esterification of oil with alcohol in the presence of moderate …
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Designing a biodiesel supply chain in Mexico City
Mexico City is a prime location to start a biodiesel enterprise due to its sizeable availability of waste vegetable oil (WVO) and biodiesel users. WVO is an extremely viable feedstock for producing biodiesel because of the similar functional properties compared to other feedstocks and low cost; …
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Mechanistic Modeling of Biodiesel Production via Heterogeneous Catalysis
Biodiesel has emerged as a promising renewable and clean energy alternative to petrodiesel. While biodiesel has traditionally been prepared through homogeneous basic catalysis, heterogeneous acid catalysis has been investigated recently due to its ability to convert cheaper but high free fatty acid …
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BIODIESEL PRODUCTION THROUGH MICROWAVE ASSISTED TRANSESTERIFICATION OF MICROBIAL CELLS
… studied to grow on several substrates including biodiesel production byproduct crude glycerol and sweet sorghum juice. After cultivation, yeast cells were heated under microwave radiation to extract lipid and produce biodiesel through in-situ transesterification. Firstly, the yeast growth with …
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Biodiesel profitability and linkages to the soybean oil market
… the relationship between soybean oil and biodiesel markets in the US through a structural model and a time-series econometric model. A conceptual link is built based on the theories of market efficiencies and implications of a binding mandate on supply and demand. We hypothesize that a …
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