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Thèses sur le sujet « Ethanol Oxidation »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 26 juillet 2025

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1

Ploeger, Jason M. "Co-oxidation in supercritical water : methylphosphonic acid-ethanol and ammonia-ethanol model systems." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35518.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2006.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Includes bibliographical references.<br>Supercritical water (SCW) is an effective solvent for the destruction of organic compounds by oxidation. Because both organics and oxygen have high solubility in water above its critical point (To = 374 °C (647 K), Pc = 221 bar), they can be reacted together in a single phase which avoids mass transfer limitation

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2

Demir-kivrak, Hilal. "Synthesis And Characterization Of Ethanol Electro-oxidation Catalysis." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12613887/index.pdf.

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ABSTRACT SYNTHESIS AND CHARACTERIZATION OF ETHANOL ELECTRO-OXIDATION CATALYSIS Demir-Kivrak, Hilal Ph.D., Department of Chemical Engineering Supervisor : Prof. Dr. Deniz &Uuml<br>ner Co-supervisor : Dr. Sadig Kuliyev October 2010, 196 pages In this study, the role of defects, the role of Sn in relation to defects, and the role of oxide phase of tin in ethanol electro-oxidation reaction were investigated. Firstly, adsorption calorimetry measurements were conducted on monometallic (1%Pt, 2%Pt, and 5%Pt) and bi-metallic (5% Pt-Sn) &gamma<br>-Al2O3 supported Pt catalysts. It was observed that whil

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3

Schmidt, Alexander [Verfasser]. "Syntrophic oxidation of butyrate and ethanol / Alexander Schmidt." Konstanz : Bibliothek der Universität Konstanz, 2015. http://d-nb.info/1110771622/34.

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4

Minuzzi, Felipe Crivellaro. "Reduction techniques applied to the oxidation of ethanol." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2018. http://hdl.handle.net/10183/182056.

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A simulação numérica de escoamentos reativos, como a combustão, tem um caráter altamente não-linear devido a presença de diversas reações químicas que acontecem entre as espécies que descrevem o processo de oxidação do combustível. Além disso, tais processos ocorrem a nível molecular, tornando o sistema de equações governantes rígido, o que implica na necessidade de esquemas numéricos de alta ordem bem como malhas finas e passo de tempo pequeno, aumentando consideravelmente o custo computacional. Neste sentido, o uso de mecanismos de oxidação detalhados na simulação numérica é proibitivo, e té

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5

Beyhan, Seden. "Synthesis and characterization of nanoparticles for ethanol oxidation in direct ethanol fuel cell (DEFC)." Poitiers, 2010. http://theses.edel.univ-poitiers.fr/theses/2010/Beyhan-Seden/2010-Beyhan-Seden-These.pdf.

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Les piles à combustible à membrane échangeuse de protons à oxydation directe de l'éthanol (DEFC, Direct Ethanol Fuel Cell) sont une technologie prometteuse pour les applications de faible puissance au regard de la grande densité d'énergie contenue dans ce combustible, de la faible température de fonctionnement, de la non toxicité et de la disponibilité de ce composé. Cependant, quelques problèmes sont à surmonter si nous souhaitons voir émerger cette technologie pour le grand public. Pour le catalyseur situé à l’anode, deux inconvénients majeurs posent problème avec les DEFCs, à savoir le coût

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6

Mehlomakulu, Boni kaKhuzwayo. "Partial oxidation of ethanol over vanadium iron antimonate catalysts." Doctoral thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/5983.

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Bibliography: p. 151-161.<br>VSbO₄ and FeSbO₄ are proven catalysts for the amm(oxidation) of propane/propylene. These catalysts systems have been shown to possess over-oxidation limiting characteristics. Ethanol oxidation is carried out in two-staged processes industrially, mainly because of the challenges presented by over-oxidation of the intermediates to carbon oxides.

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Gucbilmez, Yesim. "Vanadium And Molybdenum Incorporated Mcm-41 Catalysts For Selective Oxidation Of Ethanol." Phd thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/3/12606179/index.pdf.

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ABSTRACT VANADIUM AND MOLYBDENUM INCORPORATED MCM-41 CATALYSTS FOR SELECTIVE OXIDATION OF ETHANOL G&uuml<br>&ccedil<br>bilmez, YeSim Ph.D., Department of Chemical Engineering Supervisor : Prof. Dr. Timur Dogu Co-Supervisor: Prof. Dr. Suna Balci June 2005, 144 pages In this study, V-MCM-41, MCM-41 and Mo-MCM-41 catalysts were synthesized by the one-pot alkaline and acidic synthesis methods. The as-synthesized catalysts were found to have high BET surface areas

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Ozturk, Zafer. "Carbon Supported Platinum-palladium Catalysts For Methanol And Ethanol Oxidation Reactions." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613008/index.pdf.

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In this work, two groups of carbon supported Pt-Pd catalysts have been prepared in order to investigate the effect of Pd, as a second metal, and surfactants on the catalytic activity towards methanol and ethanol oxidation reactions used in the direct methanol and ethanol fuel cells. In the first group (group a), 1- hexanethiol was used as a stabilizing agent while in the second group (group b), 1,1 dimethyl hexanethiol was utilized. Cyclic voltammetry (CV), chronoamperometry (CA), X-ray diffraction (XRD), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS) and X-

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9

Moghieb, Ahmed. "Electrochemical oxidation of ethanol using Nafion electrodes modified with heterobimetallic catalysts." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0041294.

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10

Brazeau, Nicolas. "Palladium-Based Catalysts for Ethanol Electrooxidation in Alkaline Media." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32201.

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Direct ethanol fuel cells have been shown to be a good alternative to internal combustion engines in order to reduce the CO2 emissions. In this study, Pd and Pd-based nanocatalysts were deposited on various supports (carbon black, graphene, SnO2, CeO2, TiO2, TiO2 nanotubes and SnO2/TiO2 nanotubes) and their effects on the catalytic properties of the deposited metal for ethanol oxidation in alkaline media are studied. These modifications to the catalytic systems have shown to cause an increase in the reaction rate at the surface of the catalyst and to reduce the overpotential of the ethanol oxi

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11

Tillonen, Jyrki. "Ethanol, acetaldehyde and gastrointestinal flora : regulatory factors and pathophysiological consequences of microbial ethanol oxidation and acetaldehyde production in the digestive tract." Helsinki : University of Helsinki, 2000. http://ethesis.helsinki.fi/julkaisut/laa/kliin/vk/tillonen/.

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12

Bayer, Domnik [Verfasser]. "Untersuchung der elektrochemischen Oxidation von Ethanol an Platin in alkalischem Medium / Domnik Bayer." Bonn : Universitäts- und Landesbibliothek Bonn, 2012. http://d-nb.info/1044082305/34.

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13

Helling, Richard K. "Oxidation kinetics of simple compounds in supercritical water : carbon monoxide, ammonia and ethanol." Thesis, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/14882.

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Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1986.<br>MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE<br>Vita.<br>Includes bibliographies.<br>by Richard K. Helling.<br>Sc.D.

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14

Pengsawang, Aniwat. "PtSnCo/C nanoparticle catalysts for ethanol electro-oxidation reaction in an acidic medium." Thesis, University of Oxford, 2018. http://ora.ox.ac.uk/objects/uuid:d2cae9a6-1bdd-43a1-b473-79935b5456bf.

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Binary PtSn/C and ternary PtSnCo/C catalysts with the nominal Pt:Sn and Pt:Sn:Co atomic ratios of 3:1, 3:1:1, 3:1:2, 3:1:3, and 3:1:4 were synthesised by the modified sodium borohydride reduction method. All the as-synthesised catalysts were characterized by a number of analytical techniques including EDS, ICP-MS, TGA, XRD, TEM, BF-STEM, XPS, and XAS. The electrocatalytic activity towards alcohol electro-oxidation was measured using cyclic voltammetry (CV) and chronoamperometry (CA). Prior to each CV measurement for an activity test, a catalyst-modified glassy carbon electrode was potential cy

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15

Alaimo, Joseph. "Identification and Characterization of Ethanol Responsive Genes in Acute Ethanol Behaviors in Caenorhabditis elegans." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/549.

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Alcohol abuse and dependence are complex disorders that are influenced by many genetic and environmental factors. Acute behavioral responses to ethanol have predictive value for determining an individual’s long-term susceptibility to alcohol abuse and dependence. These behavioral responses are strongly influenced by genetics. Here, we have explored the role of genetic influences on acute behavioral responses to ethanol using the nematode worm, Caenorhabditis elegans. First, we explored the role of ethanol metabolism in acute behavior responses to ethanol. Natural variation in human ethanol met

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16

Indar, Devon. "Oxidation of alcohols using heterogeneous Au/TiO2 catalysts." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/oxidation-of-alcohols-using-heterogeneous-autio2-catalysts(14601b30-96d8-418b-bfb8-107d25490249).html.

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This report summarises the work done on monohydroxy aliphatic alcohol upgrading using Au/TiO2 catalysis. The catalysts were initially tested using a plug-flow CO oxidation reactor; complete conversion of a stream of CO flowing over the catalyst bed at a GHSV of approximately 79,500 hr-1 was typically achieved without any required external heating. TEM analysis showed that the freshly prepared catalyst does not contain detectable Aunano clusters, while the spent CO oxidation catalyst had clearly visible nanoparticles with an average size of approximately 1.6 nm. XRD analyses showed that the fin

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Mamada, Sukamto Salang. "Studies on the Toxicity of Mixtures of Haloacetates and Ethanol in AML-12 Cells." University of Toledo Health Science Campus / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=mco1396531704.

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18

Hibino, Takashi, Atsuko Tomita, Mitsuru Sano, et al. "Single-Chamber SOFCs Using Dimethyl Ether and Ethanol." The Electrochemical Society, 2007. http://hdl.handle.net/2237/18431.

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19

Li, Wei. "Kinetics and Mechanism of Ozone Decomposition and Oxidation of Ethanol on Manganese Oxide Catalysts." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/40501.

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Understanding and establishing reaction mechanisms is an important area in heterogeneous catalysis. This dissertation describes the use of in situ laser Raman spectroscopy combined with kinetic measurements and dynamic experiments to determine the mechanism of catalytic reactions. Two cases involving ozone reactions on manganese oxide catalysts were treated. Manganese oxide was chosen because it is the most active of the transition metal oxides for ozone decomposition and because it is a well-known catalyst for complete oxidation reactions. The first case studied was that of the ozone decom

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20

Jiang, Lulu. "Catalytic Performance and Characterization of Zn-doped Cryptomelane-type Manganese Dioxide For Ethanol Oxidation." Miami University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=miami1352827354.

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21

Mason, Ashley M. "Electrochemical Oxidation of Ethanol in Ionic Liquids and Its Possible Use in Fuel Cells." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1271270115.

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DIAS, RICARDO R. "Preparacao e caracterizacao de eletrocatalisadores PtRu, PtSn, PtRuRh e PtSnRh para oxidacao direta de alcoois em celulas a combustivel tipo PEM utilizando a metodologia da reducao por alcool." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9387.

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Made available in DSpace on 2014-10-09T12:26:25Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:04:27Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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SANUSI, IBRAHIM J. "Synthesis, Characterization, and Analysis of TiO2/ZnO Composites Thin Films Photocatalysts for Ethanol Vapor Oxidation." Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1626637854831713.

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Pallikarana, Tirumala Harini. "Role of mitochondrial beta-oxidation in ethanol response: A candidate gene study using Caenorhabditis elegans." VCU Scholars Compass, 2017. http://scholarscompass.vcu.edu/etd/4993.

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Alcohol use disorder (AUD) is the fourth leading cause of preventable death in the United States, and the fifth leading risk factor for premature death and disability, globally. There are currently very few treatment options for AUD and there is a need for effective preventive and treatment strategies for this condition. AUD risk has a significant hereditary component, with the contribution of genetic factors being estimated to be about 50%. The Davies-Bettinger laboratory uses C. elegans as a model organism to study the contribution of genetic factors in modulating neuronal responses to ethan

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25

Zhang, Weimin. "In situ laser Raman studies of the mechanism of ethanol oxidation over supported molybdenum oxide." Diss., This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-06062008-151703/.

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26

Felix-Balderrama, Sandra. "COMPARISON OF THE ELECTROCHEMICAL PROPERTIES OF ETHANOL IN PERCHLORIC ACID AND IONIC LIQUIDS." Wright State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=wright1258588847.

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Paruchuri, Divya. "Conversion of hardwoods to ethanol design and economics of delignification and enzyme recycling /." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26657.

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Thesis (M. S.)--Chemical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Muzzy, John; Committee Member: Frederick, Jim; Committee Member: Realff, Matthew. Part of the SMARTech Electronic Thesis and Dissertation Collection.

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ASIRI, HALEEMA AIED. "THEORETICAL PREDICTIONS OF POTENTIALS FOR INTERMEDIATE STEPS IN METHANOL AND ETHANOL ELECTROCHEMICAL OXIDATION ON Pt(111)." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1364831283.

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Cantane, Daniel Augusto. "Investigação da oxidação eletroquímica de etanol por espectrometria de massas on-line sobre nanoestruturas metálicas." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-04042013-143626/.

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Etanol é um combustível químico promissor como uma fonte de geração de energia in situ para a aplicação em células a combustível de baixa temperatura (25 °C). Entretanto, o desenvolvimento das células a combustível utilizando etanol no ânodo têm sido prejudicado devido à baixa eficiência na oxidação eletroquímica do etanol para dióxido de carbono. Com isso, esta tese tem como objetivo sintetizar novos eletrocatalisadores nanoestruturados e investigar a sua atividade catalítica para a eletro-oxidação do etanol; além de avançar no conhecimento do mecanismo reacional envolvido. Para o estudo

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Yu, Bin. "Development of silver nanocatalyst for propylene selective oxidation reaction." Thesis, University of Oxford, 2018. http://ora.ox.ac.uk/objects/uuid:0f3f0556-bff1-4af1-bfe0-0e62b0425bff.

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Propylene is the second most important starting chemical in the petrochemical industry after ethylene. Unlike ethylene, propylene readily undergoes substitution reactions including polymerisation, oxidation, halogenation, hydrohalogenation, alkylation, hydration, oligomerization and hydroformylation, which lead to a wide variety of important downstream products. One of the principal uses of propylene is to produce key chemicals from selective oxidation. In 2016, the world annual production of propylene is about 94 million tonnes, and the global proportion used to produce selective oxidation pr

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Gordon, Ashley Rebecca. "Evaluation of TiO2 as a Pt-Catalyst Support in a Direct Ethanol Fuel Cell." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/31505.

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Direct ethanol fuel cells are of interest due to the high energy density, ease of distribution and handling, and low toxicity of ethanol. Difficulties lie in finding a catalyst that can completely oxidize ethanol and resist poisoning by intermediate reaction species. Degradation of the catalyst layer over time is also an issue that needs to be addressed. In this work, niobium doped-titanium dioxide (Nb-TiO2) is investigated as a platinum (Pt) support due to its increased resistance to corrosion compared to the common catalyst support, carbon. It has also been seen in the literature that Ti

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St, John Samuel. "Hierarchical Electrocatalyst Structure Control to Study Cathodic and Anodic Overpotential in Proton Exchange Membrane Fuel Cells." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1384334674.

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Døssland, Line Teigen. "Electro-oxidation of ethanol at Pt electrodes with the use of a Dynamic Electrochemical Impedance Spectroscopy (DEIS) technique." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for materialteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18864.

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Electro-oxidation of ethanol on smooth platinum surfaces was studied in thetemperature range 21C to 140C for 0.2 M ethanol in 0.5 M sulphuric acid.This was done by use of cyclic voltammetry and electrochemical impedancespectroscopy. In addition cyclic voltammetry with different ethanol concentrationsfrom 0.1 M to 1 M, in 0.5 M sulphuric acid was done at room temperature.Cyclic voltammetry with different ethanol concentrations showed a shift to morepositive potentials for the first oxidation peak in positive going scan as the ethanolconcentration increased. A shift to more positive potentials w

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Courtois, Julien. "Iridium-based bimetallic alloy catalysts for the ethanol oxidation reaction for fuel cells modeled by density functional theory." Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-theses/295.

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Current ethanol oxidation catalysts in direct ethanol fuel cells (typically platinum-based) suffer from low conversion and are susceptible to CO poisoning. Therefore we determined to find viable alternative catalysts for ethanol oxidation based on iridium using density functional theory to model bimetallic alloy (111) surfaces. Iridium was alloyed with another transition metals M in an overlayer (one layer of metal M on top of bulk iridium) or subsurface configuration (M is inserted under the first layer of iridium). Complete oxidation of ethanol is limited by the breaking of strong C-C bonds,

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Breite, Manuela [Verfasser], Martin [Akademischer Betreuer] Bertau, Martin [Gutachter] Bertau, and Alexander [Gutachter] Michaelis. "Bioethanol in der Hochtemperaturbrennstoffzelle : Partielle Oxidation von Ethanol / Manuela Breite ; Gutachter: Martin Bertau, Alexander Michaelis ; Betreuer: Martin Bertau." Freiberg : Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2013. http://d-nb.info/1220911488/34.

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Poppe, Jens. "Spektroelektrochemische Untersuchungen der Elektrooxidation von Menthol, Ethanol und Ethylenglykol in alkalischer Lösung an kalt-abgeschiedenen Mehrkomponentenschichtelektroden." [S.l. : s.n.], 2002. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB10061291.

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Paulino, Marcia Elizangela. "Estudos eletroquímicos e fundamentais da reação de oxidação de etanol." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-24072012-103453/.

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O desenvolvimento de sistemas eletroquímicos que produzam energia limpa, a baixo custo, além de contribuir com a redução dos problemas de saúde, esses causados pelo uso indiscriminado dos atuais combustíveis, tem despertado o interesse em compreender a reação de oxidação eletroquímica do etanol para emprego em sistemas de energia. O contexto abordado neste estudo se refere a reação de oxidação de etanol no seu aspecto mais fundamental. Para tal finalidade foram empregadas diferentes superfícies cristalográficas de platina, devido a ampla estabilidade desse metal em diferentes meios eletrolític

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Dias, Ricardo Rodrigues. "Estudo dos eletrocatalisadores de PtSnRh/C + CeO2 preparados pelo método da redução por álcool para a oxidação eletroquímica do etanol." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-01102013-153858/.

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Os eletrocatalisadores PtRh (50:50)/85% C + 15% CeO2, PtRh (90:10)/ 85% C + 15% CeO2, PtSn (50:50)/ 85% C + 15% CeO2 e PtSnRh/85% C + 15% CeO2 Todos os eletrocatalisadores foram caracterizados físico-quimicamente pelas técnicas de difração de raios X (DRX) e microscopia eletrônica de transmissão (MET). Por meio das análises de DRX foi observada a presença a estrutura cúbica de face centrada típica de platina e suas ligas, além de uma fase de SnO, em diferentes composições atômicas, foram preparados pelo método da redução por álcool para serem testados nos estudos de oxidação eletroquímica de e

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Velasquez, Juliana. "Anaerobic oxidation of ethanol over spinel mixed oxides: the first step in the steam-iron process for H2 production." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/3876/.

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The future hydrogen demand is expected to increase, both in existing industries (including upgrading of fossil fuels or ammonia production) and in new technologies, like fuel cells. Nowadays, hydrogen is obtained predominantly by steam reforming of methane, but it is well known that hydrocarbon based routes result in environmental problems and besides the market is dependent on the availability of this finite resource which is suffering of rapid depletion. Therefore, alternative processes using renewable sources like wind, solar energy and biomass, are now being considered for the production o

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SILVA, DIONISIO F. da. "Preparacao de eletrocatalisadores PtRu/C e PtSn/C utilizando feixe de eletrons para aplicacao como anodo na oxidacao direta de metanol e etanol em celulas a combustivel de baixa temperatura." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9475.

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Made available in DSpace on 2014-10-09T12:27:08Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:56:45Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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SILVA, ROBERTO W. R. V. da. "Preparacao e caracterizacao de eletrocatalisadores PtRu/C e PtSn/C via reducao quimica por acido citrico para oxidacao direta de alcoois em celulas a combustivel tipo PEN." reponame:Repositório Institucional do IPEN, 2008. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11741.

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Made available in DSpace on 2014-10-09T12:55:18Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:06:01Z (GMT). No. of bitstreams: 0<br>Dissertação (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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Teixeira, Milena Elias. "Desenvolvimento de catalisadores de composições binárias e ternárias preparados pelo método sol-gel para células a combustível de etanol direto." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/75/75131/tde-29082007-114250/.

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Este trabalho descreve o desenvolvimento e a caracterização de novos materiais catalíticos para a oxidação de etanol em células a combustível. Os materiais foram preparados pela incorporação de diferentes metais nobres, tais como Pt, Ru, Rh e/ou Ir, no carbono Vulcan® XC-72 de alta área superficial, como misturas binárias e ternárias, usando o método Sol-gel. Os sistemas usados na investigação incluíram as misturas binárias (Pt0,75-Ru0,25/C, Pt0,75-Rh0,25/C e Pt0,75-Ir0,25/C) e as misturas ternárias (Pt0,75(Ru0,5-Rh0,5)0,25/C, Pt0,5(Ru0,5-Rh0,5)0,5/C, Pt0,25(Ru0,5-Rh0,5)0,75/C, Pt0,75(Ru0,5-Ir

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CARDOSO, Ziel dos Santos. "Avaliação das características químicas e eletroquímicas do etanol obtido do mesocarpo do coco babaçu para uso em célula a combustível." Universidade Federal do Maranhão, 2017. http://tedebc.ufma.br:8080/jspui/handle/tede/1881.

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Submitted by Rosivalda Pereira (mrs.pereira@ufma.br) on 2017-08-30T17:21:30Z No. of bitstreams: 1 ZielCardoso.pdf: 10421254 bytes, checksum: 64b124fa2c3c53c3140fae7e74dba03d (MD5)<br>Made available in DSpace on 2017-08-30T17:21:30Z (GMT). No. of bitstreams: 1 ZielCardoso.pdf: 10421254 bytes, checksum: 64b124fa2c3c53c3140fae7e74dba03d (MD5) Previous issue date: 2017-07-25<br>Fundação de Amparo à Pesquisa e ao Desenvolvimento Científico e Tecnológico do Maranhão (FAPEMA)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>This work intends to avaluate the potential use of

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Niether, Christiane. "Étude de l’oxydation électrocatalytique de l’éthanol dans les conditions d’une pile à combustible à membrane électrolyte polymère haute température." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS026/document.

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La réaction d'oxydation électrocatalytique hétérogène de l’éthanol (ethanol oxidation reaction - EOR) en phase gazeuse a été étudiée sur une plage de température comprise entre 120 °C à 180 °C dans les conditions d’une pile à combustible à membrane d'échange de protons (proton exchange membrane fuel cell - PEM-FC).Les piles à combustible à éthanol direct (direct ethanol fuel cell - DEFC) offrent la possibilité de produire de l'énergie électrique à partir d'un carburant renouvelable doté d’une infrastructure de production et de distribution préexistante. Cependant, l'efficacité énergétique théo

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AYOUB, JAMIL M. S. "Preparação de eletrocatalisadores PtSbsub(2)Osub(5).SnOsub(2) suportados em carbono e ATO pelo método da redução por álcool para oxidação eletroquímica do etanol." reponame:Repositório Institucional do IPEN, 2013. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10179.

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Made available in DSpace on 2014-10-09T12:35:40Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:03:55Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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Gulbrandsen, Stephani. "Stress corrosion cracking of 316L austenitic stainless steel in high temperature ethanol/water environments." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/47815.

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There has been an increase in the production of bio-fuels. Organosolv delignification, high temperature ethanol/water environments, can be used to separate lignin, cellulose, and hemicelluloses in the bio-mass for bio-fuel production. These environments have been shown to induce stress corrosion cracking (SCC) in 316L stainless steel. Previous research has been done in mixed solvent environments at room temperature to understand SCC for stainless steels, but little is known about the behavior in high temperature environments. Simulated organosolv delignification environments were studied, vary

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Scachetti, Tatiane Pereira [UNESP]. "Estudo da eletrocatálise da reação de oxidação de etanol sobre fases intermetálicas ordenadas Pt-M (M = Mn,Mo, Pb, Sb e Sn)." Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/88450.

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Made available in DSpace on 2014-06-11T19:23:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-08-28Bitstream added on 2014-06-13T18:09:36Z : No. of bitstreams: 1 scachetti_tp_me_bauru.pdf: 1191066 bytes, checksum: 5b80315fb832aa7768b76bd2966dd871 (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Fases intermetálicas ordenadas de platina e de alguns metais de transição, Pt-M (M = Mn, Mo, Pb, Sb e Sn), são propostas como materiais eletrocatalisadores para serem utilizadas em células a combustível de oxidação direta de etanol pela possibilidade de unir, n

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Silva, Elen Almeida Leal da. "Catalisadores de Pt e PtSn suportados em biocarvões ativados para a eletro-oxidação do etanol." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/135435.

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As células a combustível de etanol direto (DEFCs, Direct Ethanol Fuel Cells) são baseadas na eletro-oxidação do etanol à baixa temperatura e necessitam catalisadores à base de metais nobres, devido à cinética mais lenta para as reações de oxi-redução. Entre os catalisadores, a platina e as ligas de platina são os mais utilizados. Materiais para suportar os catalisadores são necessários a fim de reduzir a carga do mesmo empregada. Um dos suportes de catalisadores mais versáteis é o carvão ativado, e um dos mais utilizados tem sido o carvão mineral Vulcan. Recentemente, estudos têm sido realizad

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Antoniassi, Rodolfo Molina. "Desempenho elétrico e distribuição dos produtos da célula a combustível com etanol direto utilizando Pt/C, PtSn/C(liga) e PtSnO2/C como eletrocatalisadores anódicos." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-04072013-132158/.

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No presente trabalho, o desempenho elétrico dos eletrocatalisadores anódicos Pt/C, Pt3Sn/C(liga), Pt(SnO2)/C, Pt3(SnO2)/C e Pt9(SnO2)/C para as reações de eletro-oxidação de etanol, acetaldeído e ácido acético foi investigado. Testes em célula unitária mostraram que a adição de Sn seja na forma de liga Pt-Sn ou na forma de óxido (SnO2) coexistente com a platina metálica aumenta consideravelmente a resposta elétrica gerada pela célula. A melhora no desempenho elétrico dos catalisadores a base de PtSn é resultado da capacidade em oxidar o acetaldeído, majoritariamente produzido pelo Pt/C, em áci

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Kung, Chih-Chien. "Development of Three Dimensional Platinum–Ruthenium/Graphene Foam Bimetallic Nanocatalysts for Methanol and Ethanol Oxidation Reactions in Energy Storage and Hydrogen Peroxide Detection in Biosensing." Case Western Reserve University School of Graduate Studies / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=case1391512843.

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