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Dissertations / Theses on the topic 'Transesterification kinetics'

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Published: 4 June 2021
Last updated: 2 February 2022

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1

Zhang, Wei. "Sustainable Polycarbonate Nanocomposites: Impact of Production Method and Composition." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1417954859.

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2

Nelson, Daniel R. "Transesterification and Recovery of Intracellular Lipids Using a Single Step Reactive Extraction." DigitalCommons@USU, 2010. https://digitalcommons.usu.edu/etd/642.

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A single-step, extractive reaction for extraction of lipids such as biodiesel components, omega-3 fatty acids, or other triglycerides from microbial cells was examined. Conventional methods for lipid extraction use toxic solvents, and require multiple steps and long processing times. When the goal is to produce fatty acid methyl esters or FAMEs, the extracted lipids are subjected to a separate transesterification reaction with simple alcohols in the presence of an acid or base catalyst. A simplified, single-step reactive extraction method can be applied that combines the sequential extraction
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3

Visser, Hendrik Petrus. "Biodiesel production from a butter factory effluent / H.P. Visser." Thesis, North-West University, 2012. http://hdl.handle.net/10394/9250.

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The production of biodiesel from a butter factory effluent was the main focus of the study. The alkali transesterification reaction was used to produce the biodiesel. The effect of the temperature, alcohol to oil molar ratio, catalyst concentration and the reaction time was investigated to determine the optimal reaction conditions. The reaction temperature varied from 45 °C to 65 °C with a 5 °C increment. The alcohol to oil molar ratio varied from 3:1 to 8:1 with an increment of 1:1. The experiments with varying catalyst load were carried out at 0.8 wt%, 1.0 wt% and 1.2wt%. The reaction time w
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4

PEITER, Amanda Santana. "Estudo experimental, simulação e modelagem do efeito de agitação e mistura no processo da produção de biodiesel de soja (Glycine max) metílico e etílico." Universidade Federal de Campina Grande, 2017. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1469.

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Submitted by Maria Medeiros (maria.dilva1@ufcg.edu.br) on 2018-08-16T12:27:26Z No. of bitstreams: 1 AMANDA SANTANA PEITER - TESE (PPGEQ) 2017.pdf: 4504888 bytes, checksum: 524c2d78079fab537fef86ee47f99f28 (MD5)<br>Made available in DSpace on 2018-08-16T12:27:26Z (GMT). No. of bitstreams: 1 AMANDA SANTANA PEITER - TESE (PPGEQ) 2017.pdf: 4504888 bytes, checksum: 524c2d78079fab537fef86ee47f99f28 (MD5) Previous issue date: 2017-09-15<br>O consumo de combustíveis derivados do petróleo aumenta a cada ano, o que resulta no aumento da poluição atmosférica. Devido a isso a economia mundial necessit
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5

Pereira, Maria de Fatima. "Óxido de zinco dopado para produção de biodiesel." Universidade Federal da Paraíba, 2016. http://tede.biblioteca.ufpb.br:8080/handle/tede/9190.

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Submitted by ANA KARLA PEREIRA RODRIGUES (anakarla_@hotmail.com) on 2017-08-01T11:30:58Z No. of bitstreams: 1 arquivototal.pdf: 3636328 bytes, checksum: ddc2927ae330b27ef4de24fdb3975d47 (MD5)<br>Made available in DSpace on 2017-08-01T11:30:58Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 3636328 bytes, checksum: ddc2927ae330b27ef4de24fdb3975d47 (MD5) Previous issue date: 2016-08-22<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>Powders of pure zinc oxide (ZnO) and zinc oxide doped with 5% Al3+ (ZNAL) were obtained by the Pechini method using Zn(NO3)2.6H2O and
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6

Bennadji, Hayat. "Biodiesel : combustion des esthers éthyliques d'huiles végétales comme additifs au pétrodiesel." Thesis, Vandoeuvre-les-Nancy, INPL, 2010. http://www.theses.fr/2010INPL044N/document.

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Le biodiesel est un biocarburant, composé d'un mélange de mono-esters d'acide gras saturés et insaturés avec une longue chaîne carbonée. Ce travail de thèse présente les données de la littérature sur l'origine du biodiesel et son procédé de fabrication ; sont présentées aussi les performances et les émissions des moteurs diesel fonctionnant au biodiesel et la cinétique d'oxydation du biodiesel. Des efforts ont été faits pour mettre en évidence les principales différences entre les esters méthyliques et éthyliques tout en montrant que d'autres recherches sont encore à développer. Pour ces raiso
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7

LOREK, SERGE. "Etude de la modification de copolymeres d'olefines par des reactions d'echange et de condensation en milieu fondu." Université Louis Pasteur (Strasbourg) (1971-2008), 1989. http://www.theses.fr/1989STR13053.

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Stabilisation de melanges de polymeres incompatibles (eva et polyamide 11 par des reactions de condensation interpolymeres. Modification chimique de copolymeres d'olefines a fonctions ester laterales par transesterification et aminolyse, en solution et a l'etat fondu, dans un malaxeur discontinu
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8

Kadi, Mohamed El Amine. "Contribution à l'étude de l'influence des biocarburants et de leurs propriétés sur le fonctionnement des moteurs à combustion interne." Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2020. http://www.theses.fr/2020IMTA0207.

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Le réchauffement climatique, dû essentiellement aux gaz à effet de serre, et l’augmentation de la demande mondiale en énergies fossiles ainsi que leur épuisement rapide, représentent des défis environnementaux et économiques mondiaux,qui ont incité la communauté mondiale à se tourner vers les énergies alternatives et renouvelables. Cette thèse s’inscrit dans cette optique de développement des énergies renouvelables. Le travail de recherche peut se résumer en deux grands axes, où le premier englobe le développement du procédé de production de biodiesel en continu avec différentes matières premi
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9

Paiva, Eduardo José Mendes de. "Estudo da produção de biodiesel a partir de óleo de babaçu e etanol utilizando a transesterificação alcalina tradicional com agitação mecânica e assistida por ultrassons." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/97/97137/tde-26092012-171745/.

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Neste trabalho foram sintetizados ésteres etílicos do óleo de babaçu através da catálise alcalina em meio homogêneo. O planejamento de experimentos foi utilizado como ferramenta de otimização e também na identificação dos principais fatores que influenciam nas conversões em ésteres etílicos. As reações de transesterificação foram realizadas através de duas metodologias de processo - a tradicional com agitação mecânica e a promovida por ondas ultrassônicas. A espectrometria de ressonância magnética nuclear foi utilizada na quantificação das conversões de todos os experimentos e a análise termog
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10

Dantas, Hermesson Jales. "Estudo Termoanalítico, Cinético e Reológico de Biodiesel Derivado do Óleo de Algodão." Universidade Federal da Paraí­ba, 2006. http://tede.biblioteca.ufpb.br:8080/handle/tede/4578.

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Made available in DSpace on 2015-05-07T14:49:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-02-23<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES<br>Most of the world energy consumption derives from oil, coal and natural gas. The shortage of the energy sources, especially the energy from fossil fuels, and moreover the impossibility of its renewal has motivated the development of technologies that allow for the usage of renewable energy sources. Biodiesel is biodegradable, renewable and it obeys the cycle of carbon. It is defined as a blend of mono-alky
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11

Zhang, Yan. "Chemoenzymatic Resolution in Dynamic Systems : Screening, Classification and Asymmetric Synthesis." Doctoral thesis, KTH, Organisk kemi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-123089.

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This  thesis  is  divided  into  four  parts,  all  centered  around  Constitutional Dynamic  Chemistry  (CDC)  and  Dynamic  Kinetic  Resolution  (DKR)  using biocatalysts for selective transformations, and their applications in screening of bioactive compounds, organic synthesis, and enzyme classification.    In  part  one,  an  introduction  to  CDC  and  DKR  is  presented,  illustrating  the basic  concepts,  practical  considerations  and  potential  applications  of  such dynamic systems, thus providing the background information for the studies in the following chapters.   In part two,
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12

Farias, Mirna Ferreira de. "Avalia??o do comportamento termoanal?tico e oxidativo do biodiesel de mamona." Universidade Federal do Rio Grande do Norte, 2006. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17586.

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Made available in DSpace on 2014-12-17T15:41:39Z (GMT). No. of bitstreams: 1 MirnaFF.pdf: 726469 bytes, checksum: 081aa47437617ba8013fcd1faab3c2f1 (MD5) Previous issue date: 2006-12-18<br>Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico<br>In this work biodiesel was gotten through the transesterification reaction using the oil of castor as source of triglycerides and using the methylic route for obtaining of esters. For the characterization of biodiesel and its mixtures with mineral diesel oil, physical chemical parameters and several analytical techniques had been used, as we
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13

Zainal-Abidin-Murad, Sumaiya. "Production of biodiesel from used cooking oil (UCO) using ion exchange resins as catalysts." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/10276.

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This study focuses on the development of novel two-stage esterification-transesterification synthesis of biodiesel from used cooking oil (UCO) using novel heterogeneous catalysts. The esterification of the UCO was investigated using three types of ion exchange resins catalysts including Purolite D5081, Purolite D5082 and Amberlyst 15. Of all the catalysts investigated, Purolite D5081 resin showed the best catalytic performance and was selected for further optimisation studies. From the optimisation study, it was found that the external and internal mass transfer resistance has negligible effec
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14

Bosley, Amber L. "Algae Characterization and Processing Techniques." University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1321538296.

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15

Vongvilai, Pornrapee. "Dynamic Covalent Resolution: Applications in System Screening and Asymmetric Synthesis." Doctoral thesis, Stockholm : Skolan för kemivetenskap, Kungliga Tekniska högskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11200.

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16

Oliveira, Junior Gelson Cerqueira de. "Aplica??o de catalisadores a base de SiO2-SO3H na s?ntese de biodiesel: estudo cin?tico do processo de transesterifica??o de triacilglicerideos." UFVJM, 2015. http://acervo.ufvjm.edu.br/jspui/handle/1/1444.

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Data de aprova??o retirada da vers?o impressa do trabalho.<br>Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-08-30T18:13:36Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) gelson_cerqueira_oliveira_junior.pdf: 2578577 bytes, checksum: 83cb8ab9378ea856fed151a0f1c1992d (MD5)<br>Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2017-08-30T18:51:12Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) gelson_cerqueira_oliveira_junior.pdf: 257857
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17

Shrikhande, Gayatri. "Functionalization and Synthesis of Difunctional Folate-targeted Polymeric Conjugates for Potential Diagnostic Applications." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1574382154719493.

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18

Zhou, Weiyang. "Kinetics and phase behaviour of transesterification of triglycerides." 2006. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=449831&T=F.

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19

Huang, Pay-Yau, and 黃珮堯. "Transesterification of oil and the kinetics of deep-fat frying." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/09697261868156940698.

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博士<br>國立中興大學<br>食品暨應用生物科技學系所<br>102<br>Deep-fat frying is widely used in food processing. Due to the believe that fried foods have desirable flavor, color, and crispy taste, which makes them very popular to consumers, many researchers have postulated a reduction in the final fat content of fried foods. It is therefore useful to understand the mechanism of water loss and oil uptake during deep-fat frying process. Food safety has always received much public attention, and the public is particularly concerned about oils and fats. Besides deep-fat frying, oil is used for shortening, softening, gre
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20

Yeh, Yun, and 葉芸. "Biodiesel Production from Wet Microalgae by Direct Transesterification and its Kinetics." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/70168057921024263908.

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碩士<br>國立臺灣大學<br>化學工程學研究所<br>102<br>Microalgae, a photosynthetic organism, has the ability of fast-growing and lipid accumulating, which makes it a highly potential source of biofuel. However, there are some current technical barriers, such as high energy and organic solvent consumption for harvest, drying and lipid extraction. To make the process of producing biofuel production from microalgae economically feasible, an innovative process was designed to convert lipid inside microalgae into biodiesel. In this study, Chlorella sp. ESP-6 was used as the source of triglyceride. Direct transesteri
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21

Patel, Rajnikant, K. Dawson, R. Butterfield, Amir Khan, B. Ahada, and Harvey Arellano-Garcia. "Process for Synthesis of Biodiesel from Used Cooking Oil: Feasibility and Experimental Studies." 2014. http://hdl.handle.net/10454/10764.

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No<br>Biodiesel has turned out to be an integral part of the discussion of renewable energy sources and has diverse advantages in terms of its flexibility and applicability. Considering the characteristics of the transesterification reaction, a laboratory-scale system has been developed in this work. Waste Vegetable Oil (WVO), mainly sunflower oil, from local sources has been used and the transesterification carried out using methanol in the presence of sodium hydroxide catalyst. Characterisation of the biodiesel produced has been carried out using a number of different techniques including rh
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22

Zhuang, Wen-Xuan, and 莊文瑄. "Kinetic Study of Triglyceride Transesterification with Methanol Catalyzed by Calcium Oxide." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/pk6624.

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碩士<br>大同大學<br>化學工程學系(所)<br>107<br>Biodiesel as an alternative renewable fuel has become an important issue due to the shortage of petroleum energy. The most common way to produce biodiesel is catalytic transesterification of oil with methanol to yield fatty acid methyl esters and glycerol. A suitable kinetic model is necessary for biodiesel process design. Most kinetic models in the literature are simply empirical expressions and do not meet thermodynamic consistence. In this study, a new kinetic model was proposed by considering all possible catalytic reaction pathways and without assuming wh
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23

Meunier, Sarah M. "Development of a Packed-bed Reactor Containing Supported Sol-gel Immobilized Lipase for Transesterification." Thesis, 2012. http://hdl.handle.net/10012/7192.

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The objective of this work was to develop a novel enzyme immobilization scheme for supported lipase sol-gels and to evaluate the potential of the immobilized biocatalyst for the production of biodiesel in a packed bed reactor. Two sources of lipase (EC 3.1.1.3 triacylglycerol hydrolase) were used in this study and the transesterification of methanol and triolein to produce glycerol and methyl oleate was used as a model reaction of biodiesel production. A commercially available form of immobilized lipase, Novozym® 435, was used as a basis for comparison to the literature. Upon establishing
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24

Jamal, Yousuf 1973. "Investigating the Use of Ion Exchange Resins for Processing Biodiesel Feedstocks." Thesis, 2012. http://hdl.handle.net/1969.1/148043.

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Ion exchange resins, commonly used in water treatment, demonstrate promise for the production of biodiesel from biomass feedstocks. The goal of this presented PhD research is to investigate novel uses of ion exchange resins for processing biodiesel feedstocks. Specifically, this research explored using ion exchange resins to remove free fatty acids (FFA) from soybean and waste cooking oils, catalyze transesterification of soybean oil, and catalyze in-situ conversion of dried algal biomass to biodiesel and other recoverable organics. The effect of temperature, moisture content, mixing rat
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25

Mthembu, Feziwe Celile. "Modelling the production of biodiesel from non-edible oils (Jatropha curcas oil and Tobacco seed oil (TSO): a kinetic study." Thesis, 2017. https://hdl.handle.net/10539/24235.

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Thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Engineering at the School of Chemical and Metallurgical Engineering, Faculty of Engineering and the Built Environment, University of the Witwatersrand Johannesburg, South Africa October, 2017<br>The significant increase in the primary energy demand and the effort to reduce harmful emissions related to the greenhouse gases enhanced the search for alternative energy. Production and modelling processes of biofuel from non-edible oil sources assist in the process development of an environmentally fr
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