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Дисертації з теми "Alkanes"

Автор: Grafiati

Опубліковано: 4 червня 2021

Оновлено: 25 липня 2025

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1

Khalil, Enam A. S. A. "A thermodynamic study of binary and ternary mixtures of some alkanes and alkanols." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328889.

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2

Løften, Thomas. "Catalytic isomerization of light alkanes." Doctoral thesis, Norwegian University of Science and Technology, Department of Chemical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-1909.

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<p>In recent years the levels of sulfur and benzene in the gasoline pool have been reduced, and in the future there may also be new regulations on vapor pressure and the level of aromatics and olefins as well. The limitations on vapor pressure and aromatics will lead to reduced use of C<sub>4</sub> and reformate respectively. The branched isomers of C<sub>5</sub> and C<sub>6</sub> alkanes have high octane numbers compared to the straight chain isomers, and are consequently valuable additives to the gasoline pool. To maintain the octane rating, it is predicted that an increased share of isomera

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3

Pongtavornpinyo, Ruti. "Indium Carbenes Alkenes and Alkanes." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508494.

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4

Marozzelli, Filippo. "Alkanes activation over oxide catalysts." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/60089/.

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The basics of the oxidation mechanism of different alkanes within zeolites and over molybdenum oxide surfaces were studied employing state of the art computational modelling. It was shown that the constrained environment inside MFI, MFS and MOR induces terminal selectivity on the reaction of 6-, 8- and 10- term linear alkanes, i.e. hexane, octane and decane, respectively. The Monte Carlo (MC) random alkane configuration sampling showed that the oxidation reactivity is driven by the fact that the terminal C atoms of the substrate are more likely to be closer to the zeolites internal walls than

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5

ZHENG, TAO. "MOLECULAR SIMULATION OF DIFFUSION AND SORPTION OF ALKANES AND ALKANE MIXTURES IN POLY[1-(TRIMETHYLSILYL)-1-PROPYNE]." University of Cincinnati / OhioLINK, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ucin973701057.

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6

Xu, Xiangrong. "Uranyl ion sensitised photooxidation of alkanes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq27436.pdf.

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7

Gomes, Ana Catarina Costa. "Photocatalysis : Carbonylation of arenas and alkanes." Thesis, University of York, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.516370.

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8

Smith, Paul Andrew. "Simulation studies of alkanes and surfactants." Thesis, Queen's University Belfast, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314225.

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9

Shiimi, Annatolia. "Modeling Diiron enzymes for alkanes activation." Master's thesis, University of Cape Town, 2008. http://hdl.handle.net/11427/10669.

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Includes abstract.<br>Includes bibliographical references.<br>The synthesis and characterization of a series of ruthenium 'sawhorse' complexes of the type [RU2(IJ-02CRh(CO)4(Lh]' has been successfully carried out. The complexes have been characterized by IR, 1H and 13C NMR spectroscopy, elemental analysis as well as by mass spectrometry.

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10

Correia, Leslie Daniel Camara. "Oxygen transfer in hydrocarbon-aqueous dispersions and its applicability to alkane-based bioprocesses." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/999.

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11

Perry, Jason Kendrick Goddard William A. "Alkane activation by first, second, and third row transition metal ions organometallic chemistry in the gas plate /." Diss., Pasadena, Calif. : California Institute of Technology, 1994. http://resolver.caltech.edu/CaltechTHESIS:11122009-152204878.

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Thesis (Ph. D.)--California Institute of Technology, 1994. UM #94-27,313.<br>Advisor names found in the Acknowledgements pages of the thesis. Title from home page. Viewed 01/14/2010. Includes bibliographical references.

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12

Ramakrishnan, Ayyappan. "Visible light induced catalytic sulfoxidation of alkanes." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=981136915.

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13

Putra, Edy Giri Rachman. "Solution crystallization of long chain n-alkanes." Thesis, University of Sheffield, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401188.

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14

Gallagher, P. "The reductive decomposition of bis-diazo-alkanes." Thesis, University of Liverpool, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381343.

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15

Su, Yee San 1977. "The heterogeneous partial oxidation of light alkanes." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28306.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2004.<br>Includes bibliographical references.<br>(cont.) With this approach, an upper bound on the yield for OCM was computed. Results showed that even with optimal surface chemistry, strict limits existed on the attainable yield. Surface energetics necessary for superior OCM performance were identified and the origins of these requirements elucidated. The resulting upper bound on OCM yield under conventional, packed-bed, continuous-feed operation was found to be 28%. The catalytic properties of LiCl/sulfate

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16

Grant, C. R. "Evaluation of the bio-oxidation of alkanes." Thesis, University College London (University of London), 2012. http://discovery.ucl.ac.uk/1367613/.

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This thesis documents the progress made in utilising the alkane hydroxylase complex of P.putida GPo1 expressed in E.coli as a whole-cell biocatalyst for the oxidation of n-dodecane to 1-dodecanol. The process is of considerable interest due to the difficulty in performing the reaction using conventional chemistry and the large global market for fatty alcohols. The first results chapter compares the fermentative bio-oxidations using E.coli pGEc47ΔJ on n-octane and n-dodecane in a stirred tank reactor. The first reported conversion of n-dodecane in-vivo using this enzyme system in a recombinant

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17

Waldstein, Nathaniel A. "Analysis of pump oil and alkanes evaporation." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002786.

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18

Criswell, Leah. "Neutron diffraction and quasielastic neutron scattering studies of films of N-alkanes and a branched alkane absorbed on graphite." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/6010.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on March 11, 2008) Includes bibliographical references.

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19

Peter, Sebastian. "Oxyfunctionalization of alkanes, alkenes and alkynes by unspecific peroxygenase (EC 1.11.2.1)." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-113321.

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Unspecific peroxygenase (EC 1.11.2.1) represents a group of secreted hemethiolate proteins that are capable of catalyzing the selective mono-oxygenation of diverse organic compounds using only H2O2 as a cosubstrate. In this study, the peroxygenase from Agrocybe aegerita (AaeUPO) was found to catalyze the hydroxylation of various linear (e.g n-hexane), branched (e.g. 2,3-dimethylbutane) and cyclic alkanes (e.g. cyclohexane). The size of n-alkane substrates converted by AaeUPO ranged from gaseous propane (C3) to n-hexadecane (C16). They were mono-hydroxylated mainly at the C2 and C3 position, ra

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20

Grootboom, Natasha Denise. "Alkane oxidation using metallophthalocyanine as homogeneous catalysts." Thesis, Rhodes University, 2002. http://hdl.handle.net/10962/d1007794.

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Iron polychlorophthalocyanine (FePc(Cl)₁₆) and tetrasulfophthalocyanine ([M¹¹TSPc]⁴) complexes of iron, cobalt and manganese are employed as catalysts for the oxidation of cyclohexane using tert-butyl hydroperoxide (TBHP), chloroperoxybenzoic acid (CPBA) and hydrogen peroxide as oxidants. Catalysis using the FePc(Cl)₁₆ was performed in a dimethylformamide:dichloromethane (3 :7) solvent mixture. For the [Fe¹¹TSPc]⁴⁻, [Co¹¹TSPc]⁻ and [Mn¹¹TSPc]⁴⁻catalysts, a water:methanol (1:9) mixture was employed. The products of the catalysis are cyclohexanone, cyclohexanol and cyclohexanediol. The relative

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21

Stevenson, Julie-Anne. "Selective oxidation of simple alkanes by cytochrome P450cam." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302491.

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22

El, Nikheli A. H. D. "Phase equilibria in mixtures containing alkanes and alcohols." Thesis, Loughborough University, 1987. https://dspace.lboro.ac.uk/2134/10419.

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Vapor-liquid equilibria (VLE) in alkanes and alcohols was measured and a contribution Patel-Teja (GPT) equation proposed in this work. systems of nmodified Group of state was Isothermal vapor-liquid equilibria at temperatures between 298.7K and 333. 7K have been measured for the binary systems n-pentane + n-hexane. n-pentane + noctane. n-pentane + n-decane. and n-pentane + l-propanol. The data were found to be consistent according to a point-to-point consistency test and were correlated using the Wilson. NRTL. and UNIQUAC activity coefficient models. The parameters of the models were estimated

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23

Hall, Christopher. "The coordination of alkanes to transition metal fragments." Thesis, University of York, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.331939.

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24

Bourdin, Vincent, Stefano Brandani, Alfeno Gunadi, et al. "Diffusion of n-alkanes in MFI-type zeolites." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-196416.

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25

Moses, Alvira. "Synthesis of surface active alkanes for cellulose modification." Thesis, Stellenbosch : University of Stellenbosch, 2006. http://hdl.handle.net/10019.1/4874.

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119 leaves single sided printed, preliminary pages and numbered pages 1-101. Includes bibliography and a list of tables, figures, schemes and abbreviations. Digitized at 300 dpi (OCR), used Bizhub 250.<br>Thesis (MSc (Polymer Science))--University of Stellenbosch, 2006.<br>ENGLISH ABSTRACT: The properties and interactions of cellulose surfaces are of a great technical interest during papermaking and recycling. Sizing, the modification of fiber surfaces, e.g. with the purpose to reduce water penetration into the paper structure, plays an important role in obtaining paper with good printabi

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26

Schwarz, Cara Elsbeth. "The phase equilibrium of alkanes and supercritical fluids." Thesis, Stellenbosch : University of Stellenbosch, 2001. http://hdl.handle.net/10019.1/2532.

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Thesis (MScEng (Process Engineering))--University of Stellenbosch, 2001.<br>Current methods for wax fractionation result in products with large polydispersity, and due to the high temperatures required, thermal degradation of the wax is often incurred. The need for an alternative process thus exists. The purpose of this project is to investigate the technical viability of supercritical fluid processing as an alternative wax fractionation technology. The main aims of this project are to select a suitable supercritical solvent, to conduct binary phase equilibrium experiments, to determine

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27

Du, Xian. "Catalysis for CO2 activation reactions with light alkanes." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:924c17f7-5b71-4e70-b304-e0686d0413ea.

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CO<sub>2</sub>, without question, the most famous greenhouse gas, is known to have an increasing concentration in both the atmosphere and oceans. To slow down the pace not only of global warming but also the ocean acidification, several routes are proposed to effectively reduce the net emission of CO<sub>2</sub>. Compared to Carbon Capture and Sequestration/Storage (CCS), Carbon Capture and Utilisation (CCU) has much more potential because of the lower costs of scale up and higher profitability to potentially attract capital investment. Different from the conventional CCU route which is to red

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28

Wickramarachchi, P. A. S. R. "Vibrational spectroscopy of linear and branched long alkanes." Thesis, Sheffield Hallam University, 2006. http://shura.shu.ac.uk/20531/.

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In this work we studied monodisperse long chain alkanes as model compounds for semi crystalline polymers, using vibrational spectroscopy. The interest in vibrational spectroscopy is due to its sensitivity to both the crystalline structure and conformational disorder. We used the following vibrational techniques: Fourier transform infrared transmission, Fourier transform infrared - attenuated total reflection (FTIR-ATR), Raman spectroscopy and Inelastic neutron scattering (INS) spectroscopy. In addition, small angle X-ray scattering (SAXS) was used where necessary. In this study FTIR-ATR and IN

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29

Galassi, Giulio Roberto. "Monte Carlo simulations of diatomics, polymers and alkanes." Thesis, University of Southampton, 1993. https://eprints.soton.ac.uk/421719/.

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30

Xu, Wenjian. "Fluorination Effect on the Conformational Properties of Alkanes." Thesis, University of North Texas, 2002. https://digital.library.unt.edu/ark:/67531/metadc3103/.

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A Series of fluorophores of the general formular P(CF2)nP and P(CF2)n-1CF3 has been synthesized. Copper catalyzed coupling of 1-bromopyrene and the corresponding mono and di-iodoperfluoroalkanes were used in most cases. For the n=3 dimer, a novel 1,w-perfluoroalkylation of pyrene via bis-decarboxylation of hexafluorogultaric acid was utilized. These compounds, along with suitable hydrocarbon analogs, are being used to study the flexibility of fluorocarbon chains using emission. We have found that the excimer formation for the fluorinated pyrene monomers is highly dependent on concentration

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31

Abudawood, Raed Hasan. "Hydroisomerization of alkanes over metal-loaded zeolite catalysts." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/hydroisomerization-of-alkanes-over-metalloaded-zeolite-catalysts(4511d50c-ff42-49e6-9a8a-d7ad88576bb1).html.

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Zeolite catalysis plays an important role in many industrial applications due to their unique properties and has become widely used in the area of oil refining. Of particular interest is Zeolite Y, which can be hydrothermally treated into its ultrastable form, USY. USY offers a superior practicality, especially when dealuminated and metal-loaded. The importance of alkanes hydroisomerization arises from the continuingly stricter regulations imposed on the utilization of gasoline as an automotive fuel. The requirements to reduce the aromatics content in gasoline present a need to find an alterna

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32

Maeda, Nobuo, and nobuo@engineering ucsb edu. "Phase Transitions of Long-Chain N-Alkanes at Interfaces." The Australian National University. Research School of Physical Sciences and Engineering, 2001. http://thesis.anu.edu.au./public/adt-ANU20011203.151921.

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An experimental study of phase transitions of long-chain n-alkanes induced by the effect of interfaces is described. ¶ The phase behaviour of long-chain n-alkanes (carbon number 14, 16, 17, 18) adsorbed at isolated mica surfaces and confined between two mica surfaces has been studied in the vicinity of and down to several degrees below the bulk melting points, Tm. Using the Surface Force Apparatus we have measured the thickness of alkane films adsorbed from vapour (0.97 [equal to or greater-than] p/p[subscript o] [equal to or greater-than] 0.997), studied capillary condensation transition, sub

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33

Paunovic, Irena. "Solid-liquid phase behavior of mixtures of n-alkanes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0021/MQ48067.pdf.

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34

De, Silva D. S. M. "Crystallization and molecular conformation of long chain N alkanes." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246907.

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35

Hobbs, Paul Michael. "Computational sorption studies of alkanes and alkenes in zeolites." Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320085.

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36

Huguet, Edouard. "Terminal oxidation of long linear alkanes in liquid phase." Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/54952/.

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The aim of this project is to investigate the terminal activation of long chain linear alkanes in the liquid phase using the selective oxidation of w-decane to 1-decanol as a model reaction. Firstly the autoxidation of -decane with oxygen was studied. The product distribution is a mixture of Cio ketones and alcohols with shorter chain carboxylic acids. The radical autoxidation mechanism promotes oxidation in the internal position and a very low terminal selectivity is found in the product profile. A range of VMgO catalysts were tested for the oxidation of w-decane with oxygen. Leached vanadium

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37

Leroy, Frederic H. R., Hervé Jobic, Bernard Rousseau, and Alain H. Fuchs. "Self-diffusion of n-alkanes in MFI-type zeolites." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-194594.

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38

Gorce, Jean-Philippe. "Crystallisation and chain conformation of long chain n-alkanes." Thesis, Sheffield Hallam University, 2000. http://shura.shu.ac.uk/19705/.

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Hydrocarbon chains are a basic component in a number of systems as diverse as biological membranes, phospholipids and polymers. A better understanding of the physical properties of n-alkane chains should provide a better understanding of these more complex systems. With this aim, vibrational spectroscopy has been extensively used. This technique, sensitive to molecular details, is the only one able to both identify and quantify conformational disorder present in paraffinic systems. To achieve this, methyl deformations have been widely used as "internal standards" for the normalisation of peak

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39

Ordakowski, Amy L. "Alkanes as Internal Markers to Estimate Digestibility in Horses." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/46511.

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Fecal recoveries of n-alkanes were determined in three digestion balance experiments consisting of two periods each. Each experiment compared two diets in a switch-back design using eight mature Thoroughbred geldings. Horses were randomly assigned to two groups of four and offered one of two mixed grass/legume hays (Diets 1 and 2) in Exp. 1, mixed grass/legume hay and one of two concentrates (Diets 3 and 4) in Exp. 2, and mixed grass/legume pasture (Diets 5 and 6) in Exp. 3. In Exp. 1 and 2, horses were housed in stalls and in Exp. 3, two horses from each diet were housed in stalls and two

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40

Maeda, Nobuo. "Phase transitions of long-chain n-alkanes at interfaces." View thesis entry in Australian Digital Theses Program, 2001. http://thesis.anu.edu.au/public/adt-ANU20011203.151921/index.html.

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41

Stothard, Nigel David. "The oxidation of trans-2-butene and propene between 400 and 520 degree C." Thesis, University of Hull, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333710.

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42

Smart, Sharon Patricia. "Structural and dynamic properties of alpha, omega-dibromoalkanes and other guest molecules in their urea inclusion compounds." Thesis, University of St Andrews, 1993. http://hdl.handle.net/10023/14930.

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The work described in this thesis focuses on the urea inclusion compounds of α, ω-dibromo-n-alkanes: Br(CH2)[sub]nBr/urea, where n=7-10. The structural and dynamic properties of the host and guest have been studied using complementary techniques. Photographic single crystal x-ray diffraction shows that, in the regions of three- dimensional guest molecular ordering, there is a well-defined offset, Δg, along the channel axis, c, between guest molecules in adjacent channels. Δg is exactly one-third of the periodic repeat distance along c of the basic guest structure: this represents a new mode of

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43

Sorigue, Damien. "Biosynthèse d'hydrocarbures dérivés des acides gras chez les microalgues." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4084.

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Les alcanes et les alcènes sont des hydrocarbures non cycliques important dans l’industrie. Ils sont synthétisés à partir d'acides gras par une grande variété d’organismes mais les connaissances à ce sujet sont très limitées chez les microalgues. Le but de ces travaux était donc de rechercher la présence d’alcanes ou d’alcènes dans diverses microalgues modèles, et d’essayer d’identifier la ou les enzymes responsables de la synthèse de ces composés. Nous avons mis en évidence la présence d’hydrocarbures linéaires en C15-C17 chez les microalgues Chlorella et Chlamydomonas. Ces composés étaient s

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44

Fisk, Aaron T. "Dietary accumulation, sediment bioavailability and toxicity of polychlorinated n-alkanes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0028/NQ31980.pdf.

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45

Arnold, Thomas. "The adsorption of alkanes from their liquids and binary mixtures." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249654.

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46

Thompson, Richard Lewis. "Surfactant properties of semifluorinated alkanes in hydrocarbon and fluorocarbon solvents." Thesis, University of Hull, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363228.

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47

Adams, Melissa Marie. "The anaerobic oxidation of short-chain alkanes in hydrothermal vents." Thesis, Harvard University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3626342.

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<p> Microorganisms are central to the cycling of methane on Earth. The anaerobic oxidation of methane (AOM) is a globally important process in anoxic marine sediments, which is often coupled to the reduction of sulfate by anaerobic methanotroph (ANME) archaea and sulfate reducing bacteria (SRB). However, the environmental and geochemical conditions that constrain these microbial communities remain largely uncharacterized. In this dissertation, I present evidence that methane and C<sub>2</sub>-C<sub>4</sub> alkanes are substantial sources of metabolic energy in sedimented hydrothermal vent syst

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48

Garba, Mustapha Danlami. "Valorisation of alkanes and alkynes by transhydrogenation in petrochemical processes." Thesis, University of Glasgow, 2017. http://theses.gla.ac.uk/8719/.

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The production of high premium fuel is an issue of priority to every refinery. The trans-hydrogenation process was devised to convert two low value refinery cracked products to premium products; the conversion processes involve the combination of dehydrogenation and hydrogenation reactions as a single step process. The low value refinery products (i.e. alkanes and alkynes or alkadienes) have been converted to alkenes (olefins) by trans-hydrogenation using catalysts system based on VOx, CrOx and Pt all supported on alumina. Although trans-hydrogenation has been disclosed in many patents over de

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49

Modak, Viraj Prakash. "Surface Freezing in n-Alkanes: Experimental and Molecular Dynamics Studies." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449013699.

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50

Han, Kyung-Eun. "Transport of n-alkanes through graphene nanoporous atomically thin membrane." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/123294.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 67-68).<br>Accurately characterizing molecular transport through a nanoporous atomically thin graphene membrane is important in determining potential for graphene's application as a filter. Amongst many factors that affect the transport, the effect of size of molecules is analyzed in this paper. Diffusion of n-alkanes between C10 and C18 was analyzed to isolate the effect of molecule size in transport trends. The

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