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Dissertations / Theses on the topic 'Methanol-water'

Author: Grafiati

Published: 18 May 2024

Last updated: 31 July 2025

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1

Xu, Chao. "Transport phenomena of methanol and water in liquid feed direct methanol fuel cells /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?MECH%202008%20XU.

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2

Dixit, Sanhita. "Molecular models of hydration in methanol-water mixtures." Thesis, University of Edinburgh, 2002. http://hdl.handle.net/1842/10880.

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The work presented in this thesis addresses the issue of hydration of a simple amphiphile-like molecule; methanol. High-resolution Raman spectroscopy is used to study methanol-water mixtures over the whole concentration range. A highly non-linear dependence of the carbon-oxygen and carbon-hydrogen stretching frequencies with composition is observed. The data suggest the first global picture of the progressive hydration of methanol: water first breaks up the molecular chains which exist in pure methanol, and then completely hydrates the hydroxyl groups before solvating in hydrophobic methyl gro

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3

Waghe, Aparna. "Computer Simulations of Water and Methanol in Carbon Nanotube." Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/WagheA2007.pdf.

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4

Lancaster, N. M. "Excess enthalpies of mixtures containing water and methanol vapours." Thesis, University of Bristol, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375388.

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5

Lee, Christopher. "Computer simulation of ethylene glycol oxidation and methanol-water interactions." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/51368/.

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In this project, density functional theory calculations were performed to study the adsorption of ethylene glycol to the MgO (100), MgO (130), Al2O3 (0001), PdO (101) surfaces, as well as Au38 and Au38O16 nanoparticles. Adsorption of ethylene glycol is favourable to all of these surfaces with Al2O3 (0001) and PdO (101) showing the most favourable adsorption at -168 kJ mol-1 and -135 kJ mol-1 respectively. The MgO surfaces showed adsorption energies between -80 kJ mol-1 and -100 kJ mol-1, and the gold nanoparticles showed lower adsorption energies at approximately -35 kJ mol-1. Barriers to O-H

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6

Hama, Tetsuya. "Photodissociation dynamics of amorphous solid water and amorphous solid methanol." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/120883.

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7

Omideyi, T. O. "The economics of heat pump assisted distillation of methanol water mixtures." Thesis, University of Salford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376879.

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8

Powell, David Hugh. "The structure of solutions of simple electrolytes in water and methanol." Thesis, University of Bristol, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.330038.

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9

Chatterjee, Amritendu. "Solution properties of sodium carboxymethylcellulose in methanol-water mixed solvent media." Thesis, University of North Bengal, 2012. http://hdl.handle.net/123456789/1573.

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10

Genova-Koleva, Radostina Vasileva. "Electrocatalyst development for PEM water electrolysis and DMFC: towards the methanol economy." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/462861.

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In this thesis, the hydrogen obtained in a PEM water electrolizer (PEMWE) as a reactant to produce methanol when combined with the CO2 captured from the combustion of fossil fuels is proposed. Methanol is easy to manage as a fuel for DMFCs and this would help to recycle the CO2 responsible for the climate change. PEMWEs have several advantages in comparison with the alkaline electrolysis such as ecological cleanness, low power consumption, small mass, and high purity of the evolved gases. TiO2 nanoparticles and nanotubes as supports for electrocatalysts for hydrogen evolution reaction (HER) a

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11

Luk, Chee-wei Jennifer. "Solubility and Pseudo-polymorphic Transitions of L-Serine in Water-Methanol System." Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6832.

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The research addressed in this thesis is focused on the solubility and pseudo-polymorphic transition of L-serine in mixed water-methanol systems. Cooling re-crystallizations were carried out that varied both temperature and methanol concentration. Solubilities were measured with high-performance liquid chromatography. It is found that the solubility increased with increase in temperature and decreased drastically with methanol concentration. The effect of temperature at which there is a transition of L-serine crystals from the rod-shaped (anhydrous) form to hexagonal (monohydrate) form was

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12

Dede, Yavuz. "Quantum Chemical Investigation Of Reactions Of Atomic Carbon With Water And Methanol." Phd thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12609189/index.pdf.

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Reactions of singlet (1S and 1D) and triplet (3P) carbon atoms with water, and 1D and 3P carbon atoms with methanol were studied computationally. In the water and methanol systems, the carbon vapor containing a mixture of C(1S), C(1D), and C(3P) atoms, is predicted to react by primarily interacting with the oxygen, OH bond and CH bond of the substrate mainly with the 1D state. While C(1S) was proven to be unreactive C(3P) can hardly be supported to be reactive, and can safely be defined as unreactive. The major product, CO forms as a result of oxygen abstraction, which is observed as a fast, e

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13

Rothfuss, Christopher John. "The influence of high electric fields on water and methanol surface electrochemistry /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/9926.

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14

Kojima, Hiroyuki. "Statistical-Mechanical Study of Phase Transitions of Thermosensitive Polymer Gels in Water and Mixed Solvents of Water/Methanol." 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/174960.

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15

Craig, John Michael. "Theoretical Investigation of the Structure and Vibrational Frequencies of Water and Methanol Complexes." VCU Scholars Compass, 2007. http://hdl.handle.net/10156/2131.

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16

Gautam, Devaki Nandan. "Molecular dynamics simulation of horse-heart cytochrome c in water-methanol solvent systems." Thesis, Wichita State University, 2014. http://hdl.handle.net/10057/10956.

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Molecular Dynamics simulations have been carried out to investigate the dynamics of horse heart Cytochrome C and associated crystallographic water molecules in different water-methanol systems. The 100 ns simulation predicts that hh-CytC undergoes different dynamical transitions with some common conformations in different solvents. With increase of methanol concentration in solvents, hh-CytC has increased flexibility, fluctuating its hydrophobic solvent accessible surface area (SASA), and number of persistent internal hydrogen bonds with long hydrogen-bond-lifetime. The protein became more liq

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17

Splith, Tobias, Christian Chmelik, Frank Stallmach, et al. "Adsorptive heat transformation with SAPO-34: diffusion of working fluids water, methanol and ethanol." Diffusion fundamentals 24 (2015) 51, S. 1, 2015. https://ul.qucosa.de/id/qucosa%3A14570.

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18

Sutherland, Richard Daniel. "Performance of different proton exchange membrane water electrolyser components / cRichard Daniel Sutherland." Thesis, North-West University, 2012. http://hdl.handle.net/10394/9214.

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Water electrolysis is one of the first methods used to generate hydrogen and is thus not considered to be a new technology. With advances in proton exchange membrane technology and the global tendency to implement renewable energy, the technology of water electrolysis by implementation of proton exchange membrane as solid electrolyte has developed into a major field of research over the last decade. To gain an understanding of different components of the electrolyser it is best to conduct a performance analysis based on hydrogen production rates and polarisation curves. The study aim was to co

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19

Bhagan, Salome. "REACTIVITY AND EQUILIBRIUM THERMODYNAMIC STUDIES OF IRIDIUM PORPHYRINS IN WATER AND ALCOHOL." Diss., Temple University Libraries, 2012. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/213129.

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Chemistry<br>Ph.D.<br>Environmental and energy issues have stimulated renewed interest in utilizing both water and methanol as reagents and reaction mediums. Our current interest is to evaluate the scope of group nine organometallics and establish thermodynamic parameters for their reactivity in aqueous solvent. A comprehensive thermodynamic database for a wide scope of organo-rhodium transformations in a range of reaction media including benzene, water, and methanol has been well established by our group. Aqueous solutions of rhodium porphyrin have been determined to manifest an exceptional r

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20

Chamberlin, Joseph Paul. "Investigating the Water and Methanol Condensation Heat Transfer Performance of Chemically Functionalized Silica Nanospring Coated Aluminum Tubes." Miami University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami162690676666569.

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21

Fadaei, Ehsan, and Mohsen Tafazzoli. "Study of the self-diffusion coefficient in the water-methanol binary mixture from the hydrogen bonding viewpoint using DOSY NMR: Study of the self-diffusion coefficient in the water-methanol binary mixturefrom the hydrogen bonding viewpoint using DOSY NMR." Diffusion fundamentals 24 (2015) 13, S. 1, 2015. https://ul.qucosa.de/id/qucosa%3A14527.

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22

Weinzierl, Christine Verfasser], and Ulrike [Akademischer Betreuer] [Krewer. "Model Supported Analysis of Water Management in Alkaline Membrane Direct Methanol Fuel Cells / Christine Weinzierl ; Betreuer: Ulrike Krewer." Braunschweig : Technische Universität Braunschweig, 2017. http://d-nb.info/1175817171/34.

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23

Gatewood, Marena Dessette. "Solubility and recovery of L-isoleucine from high pH solutions and the cause for L-serine habit differences when crystallized from water and methanol/water solutions." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/10916.

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24

Zhao, Cen. "Advanced Oxidation Processes of Problematic Toxin and Water Contaminants: Cylindrospermopsin, Iopamidol, 4-methylcyclohexane Methanol and Propylene Glycol Phenyl Ether." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2235.

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The occurrences of cyanotoxin and organic contaminants threaten drinking water sources and are a serious human health and environmental concern. The control of these problematic contaminants and the remediation of the associated contaminants are critical for ensuring safe drinking water to significant populations. Advanced oxidation processes (AOPs) have received considerable attention as a potential water treatment for various pollutants. In this dissertation, advanced oxidative degradation of four problematic water toxic contaminants (CYN, iopamidol, 4-methylcyclohexane methanol and propylen

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25

Ahmed, Amira Yehya Mohamed [Verfasser]. "Mechanistic investigations of photoelectrochemical water and methanol oxidation on different titanium dioxide single crystal surfaces / Amira Yehya Mohamed Ahmed." Hannover : Technische Informationsbibliothek und Universitätsbibliothek Hannover (TIB), 2012. http://d-nb.info/1027563767/34.

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26

Kerasidou, Ariadni. "Investigation of the nonlinear optical response of novel azobenzene-iminopyridine derivatives and the dynamic heterogeneities of water / methanol mixtures." Thesis, Angers, 2015. http://www.theses.fr/2015ANGE0065.

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Cette étude est divisée en deux parties: l'analyse des propriétés optiques non linéaires (NLO) de nouveaux dérivés pi-conjugués d’Azobenzène Iminopyridine et les hétérogénéités dynamiques (DH) des mélanges eau/méthanol. La première partie a été réalisée en utilisant la technique Z-scan ainsi que les techniques de génération de deuxième et troisième harmoniques (SHG/THG). Communément, l'optique non linéaire est le domaine de l'optique qui étudie l'interaction de la lumière avec un système matériel et les changements induits dans les propriétés optiques des matériaux parun champ électromagnétiqu

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27

Grima, N. M. M. "Kinetic and mass transfer studies of ozone degradation of organics in liquid/gas-ozone and liquid/solid-ozone systems." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/3351.

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This work was concerned with the determination of mass transfer and kinetic parameters of ozone reactions with four organic compounds from different families, namely reactive dye RO16, triclocarban, naphthalene and methanol. In order to understand the mechanisms of ozone reactions with the organic pollutants, a radical scavenger (t-butanol) was used and the pH was varied from 2 to 9. Ozone solubility (CAL*) is an important parameter that affects both mass transfer rates and chemical reaction kinetics. In order to determine accurate values of the CAL* in the current work, a set of experiments w

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28

Fadaei, Ehsan, and Mohsen Tafazzoli. "Study of the self-diffusion coefficient in the water-methanol binary mixture from the hydrogen bonding viewpoint using DOSY NMR." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-198103.

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29

Hickner, Michael Anthony. "Transport and Structure in Fuel Cell Proton Exchange Membranes." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/28895.

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Transport properties of novel sulfonated wholly aromatic copolymers and the state-of-the-art poly(perfluorosulfonic acid) copolymer membrane for fuel cells, Nafion, were compared. Species transport (protons, methanol, water) in hydrated membranes was found to correspond with the water-self diffusion coefficient as measured by pulsed field gradient nuclear magnetic resonance (PFG NMR), which was used as a measure of the state of absorbed water in the membrane. Generally, transport properties decreased in the order Nafion > sulfonated poly(arylene ether sulfone) > sulfonated poly(imide). The w

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30

Xiao, Caibin. "Thermodynamics of aqueous electrolytes and hydrogen-bonded nonelectrolytes over a wide range of temperature and pressure, the aqueous trivalent lanthanide cations and the methanol-water system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0007/NQ36216.pdf.

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31

Wahlund, Bertil. "Rational bioenergy utilisation in energy systems and impacts on CO2emissions." Doctoral thesis, KTH, Chemical Engineering and Technology, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3490.

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<p>The increased concentration of greenhouse gases in theatmosphere, in particular CO<sub>2</sub>, is changing the Earths climate. Accordingto the Kyoto protocol, where the international community agreedon binding emission targets, developed countries are committedto reduce their greenhouse gas emissions. The increased use ofbiomass in energy systems is an important strategy to reduce CO<sub>2</sub>emissions. The purpose of this thesis has been toanalyse the opportunities for Sweden to further reduce CO<sub>2</sub>emissions in the energy system, by rationallyutilising woody biomass energy. Th

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32

Hopkins, Adam Justin 1980. "In situ analysis of aqueous structure and adsorption at fluorocarbon, hydrocarbon and mineral surfaces." Thesis, University of Oregon, 2010. http://hdl.handle.net/1794/11267.

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xvii, 209 p. : ill. A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number.<br>Altering and controlling the properties of solid surfaces in aqueous or other liquid phase environments has been a sought after objective for decades. With the discovery of chemisorbed self-assembled monolayers, this dream has become a reality. Oxide and metal surfaces can now be readily coated with an array of commercially available products to produce a desired fnctionality. The presence of these coatings on solid surfaces affects properties

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33

Saleh, Jehad. "A Membrane Separation Process for Biodiesel Purification." Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19730.

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In the production of biodiesel via the transesterification of vegetable oils, purification to international standards is challenging. A key measure of biodiesel quality is the level of free glycerol in the biodiesel. In order to remove glycerol from fatty acid methyl ester (FAME or biodiesel), a membrane separation setup was tested. The main objective of this thesis was to develop a membrane process for the separation of free glycerol dispersed in FAME after completion of the transesterification reaction and to investigate the effect of different factors on glycerol removal. These factors incl

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34

Westhues, Niklas Franz Verfasser], Jürgen [Akademischer Betreuer] Klankermayer, and Walter [Akademischer Betreuer] [Leitner. "Development of molecular transition-metal catalysts for the reverse water-gas shift reaction and the selective transformation of carbon dioxide and hydrogen to formic acid esters and methanol / Niklas Franz Westhues ; Jürgen Klankermayer, Walter Leitner." Aachen : Universitätsbibliothek der RWTH Aachen, 2020. http://d-nb.info/1227993013/34.

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35

Westhues, Niklas Franz [Verfasser], Jürgen Akademischer Betreuer] Klankermayer, and Walter [Akademischer Betreuer] [Leitner. "Development of molecular transition-metal catalysts for the reverse water-gas shift reaction and the selective transformation of carbon dioxide and hydrogen to formic acid esters and methanol / Niklas Franz Westhues ; Jürgen Klankermayer, Walter Leitner." Aachen : Universitätsbibliothek der RWTH Aachen, 2020. http://d-nb.info/1227993013/34.

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36

Douss, Néjib. "Etude experimentale de cycles a cascades a adsorption solide." Paris 7, 1988. http://www.theses.fr/1988PA077052.

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Etude experimentale et simulation dynamique de systemes de pompe a chaleur a adsorption solide. Les systemes methanol-charbon actif et eau-zeolite sont etudies. Les conditions de temperature des composants (adsorbeur, condenseur et evaporateur) doivent etre homogenes pour la simulation. On considere les cycles intermittents (simple effet), a double effet et a triple effet (cycle a cascades). Determination d'un coefficient de performance pour la production du froid

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37

Vilekar, Saurabh A. "Catalytic and Electrocatalytic Pathways in Fuel Cells." Digital WPI, 2010. https://digitalcommons.wpi.edu/etd-dissertations/125.

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A fundamental understanding of the kinetics and mechanisms of the catalytic reaction steps involved in the process of converting a fuel into hydrogen rich stream suitable for a fuel cell, as well as the electro-catalytic reactions within a fuel cell, is not only conceptually appealing, but could provide a sound basis for the design and development of efficient fuel processor/fuel cell systems. With the quantum chemical calculations on kinetics of elementary catalytic reaction steps becoming rather commonplace, and with increasing information now available in terms of electronic structures, vib

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38

Guan, Xiangguo. "The photochemistry of polyhalomethanes in water and the water-catalyzed dehalogenation reactions of selected isopolyhalomethanes, halogenated methanols and halogenated formaldehydes." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B38718960.

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39

Guan, Xiangguo, and 官向國. "The photochemistry of polyhalomethanes in water and the water-catalyzed dehalogenation reactions of selected isopolyhalomethanes,halogenated methanols and halogenated formaldehydes." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B38718960.

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40

Ferhat-Hamida, Zohra. "Caractérisation des catalyseurs cuivre-zinc par thermodésorption d'hydrogène et thermoréaction." Poitiers, 1987. http://www.theses.fr/1987POIT2011.

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41

Kotdawala, Rasesh R. "Adsorption studies of hazardous air pollutants in microporous adsorbents using statistical mechanical and molecular simulation techniques." Worcester, Mass. : Worcester Polytechnic Institute, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-050407-112429/.

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Dissertation (Ph.D.) -- Worcester Polytechnic Institute.<br>Keywords: Activated carbons; Hydrogen cyanide; Methyl ethyl ketone; Adsorption; Mercury; Monte-Carlo; Solvents; Molecular simulations; Zeolites; Water; Methanol; Nanopores. Includes bibliographical references (leaves 147-150).

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42

Felix, Joseph David. "Methanol, formaldehyde, and acetaldehyde in rain ; Development of a method to determine [delta] ¹⁵N-NO₂⁻ and NO₃⁻ in fresh and brackish waters." View electronic thesis, 2008. http://dl.uncw.edu/etd/2008-3/felixj/josephfelix.pdf.

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43

Luo, Hongze. "Polymer/nano-organic composite proton exchange membranes for direct methanol fuel cell application." Thesis, University of the Western Cape, 2005. http://etd.uwc.ac.za/index.php?module=etd&amp.

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The proton exchange membrane is one key component of direct methanol fuel cells, which has double functions of conducting protons, separating fuels and oxidant. At present, the performance and price of sulfonic acid proton exchange membrane used in direct methanol fuel cells are deeply concerned. In order to reduce membrane 's cost and improve performance of Nafion membrane, three different kinds of membranes have been studied in this thesis. These membranes are SPEEK membranes, SPEEK/ZP composite membranes and Nafion/ZP composite membranes.

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44

Rossiter, Angelina Jane. "Solubility and crystal growth of sodium nitrate from mixed alcohol – water solvents." Thesis, Curtin University, 2009. http://hdl.handle.net/20.500.11937/505.

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Due to the ductile nature of the sodium nitrate crystal which deforms plastically under high levels of strain, most of the crystal growth studies in aqueous solution have focussed on the influence of tensile strain, supersaturation and dislocation, using x-ray surface topography to characterise the dislocation structure of the crystal. Most of the crystal growth studies have also focussed on growth from the melt since single crystals of sodium nitrate find application in optical pumping experiments, are a potential substitute for calcite in the preparation of polarising prisms and are interest

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45

Liu, Wenpeng. "Methanol, water and heat transport in direct methanol fuel cells for portable power." 2005. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-869/index.html.

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46

沙宇軒. "Molecular Dynamics Simulations of Several Physical Property of Liquid Methanol and Mixed Water-Methanol." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/13608983901868990261.

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47

Viljoen, Marius. "Design and development of a methanol concentration controller for fuel cells." Thesis, 2010. http://hdl.handle.net/10352/93.

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Thesis (M. Tech.) (Engineering: Electrical, Dept.: Electronic Engineering))--Vaal University of Technology, 2008.<br>The demand for higher efficiency, sustainability and cleaner power sources increases daily. A Direct Methanol Fuel Cell is a power source that can be applied for small to medium household appliances and office equipment. It can ideally be used for operating appliances like notebook computers on remote sites where no electrical power is available. One of the problems in methanol fuel cells is methanol crossover. Methanol crossover occurs when methanol is not completely used in

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48

Titmarsh, AM. "Water maser follow-up of the methanol multibeam survey." Thesis, 2018. https://eprints.utas.edu.au/29627/1/Titmarsh_whole_thesis.pdf.

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The Australia Telescope Compact Array has been used to search for 22-GHz water masers towards the 323 6.7-GHz methanol masers detected in the Methanol Multibeam survey between Galactic longitudes 341◦ to 20◦, through the Galactic centre, and we find water masers associated with 156 (∼48 %). Methanol masers with associated water masers have a higher mean integrated luminosity than those without. In sources where both maser species are observed, the luminosities of the methanol and water masers are weakly correlated even after accounting for the partial correlation due to distance. We have inspe

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49

Yang, Ching-Jen, and 楊青仁. "DMFC stack development and study of methanol/water crossover." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/24878912357337460316.

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碩士<br>元智大學<br>機械工程學系<br>96<br>The characteristics of a 20W direct methanol fuel cell (DMFC) stack were investigated under various operating conditions in order to understand the behavior of the stack. The operating variables included the methanol concentration, the cell temperature, the flow type and flow rate. With the supply of 2M methanol, a maximum power of the stack was found to be 22W (95 mW/cm2) in air. The cell temperature affected performance significantly, and the low flow rate make performance unstable. u-type flow patterns has better performance than z-type flow patterns in the hig

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50

Wang, Po-wei, and 王柏偉. "Interactions of Oxygen, Water and Methanol with Rutile TiO2(110)." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/dqtyxr.

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碩士<br>國立中山大學<br>化學系研究所<br>103<br>In consideration of recent trend in environmental and economical issues of green-process chemistry, the eco-friendly and recyclable titanium oxide has received much attention with the aim of establishing greener, more sustainable photocatalysts. However, the quality of commercial or bench-made TiO2 is somewhat uncontrollable, and thus frequently affects the reproducibility of TiO2-mediated reactions. In order to understand the reaction mechanisms of TiO2-catalyzed interactions of oxygen, water, and methanol, as well as their cross interactions, a single crysta

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