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Tesi sul tema "Ethane"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Khan, Asad Ahmad. "Oxidative dehydrogenation (ODH) of ethane to ethene over supported vanadium containing oxide catalysts." Thesis, Cardiff University, 2016. http://orca.cf.ac.uk/91544/.

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In this thesis work oxidative dehydrogenation (ODH) of ethane to ethane over MoV oxide catalyst was investigated. The influence of the preparation techniques and different reaction conditions were studied thoroughly. It was found that the precipitation method for the catalyst preparation using variable pH produces a more active catalyst at pH values of 3 to 3.5. Slurry temperature and calcination temperature are also very important parameters which affect the selectivity pattern of the products. This selectivity pattern was found to be further influenced by reaction temperature, pressure, GHSV

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2

patankar, sumant s. "Role of Confinement on the Properties of Ethane and Ethane-CO2 Mixtures in Mesoporous Silica." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471541134.

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3

Ducatel, Estelle. "Composting of ethane pyrolysis quench sludge." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0017/MQ48061.pdf.

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4

Haddleton, D. M. "Photochemistry of some metal-ethane complexes." Thesis, University of York, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374165.

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5

Rose, Jeffrey Lawrence. "Extraction of Peace River bitumen using supercritical ethane." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0024/NQ49534.pdf.

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6

Wells, Nigel P. "Oxidation of ethane over SnOâ†2 based catalysts." Thesis, University of Nottingham, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238226.

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7

Hacoob, Saboonchian Vahe. "Bis(Dimethylphosphino)ethane and related complexes of transition metals." Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46796.

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8

Karamullaoglu, Gulsun. "Dynamic And Steady-state Analysis Of Oxidative Dehydrogenation Of Ethane." Phd thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606269/index.pdf.

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In this research, oxidative dehydrogenation of ethane to ethylene was studied over Cr-O and Cr-V-O mixed oxide catalysts through steady-state and dynamic experiments. The catalysts were prepared by the complexation method. By XRD, presence of Cr2O3 phase in Cr-O<br>and the small Cr2O3 and V2O4 phases of Cr-V-O were revealed. In H2-TPR, both catalysts showed reduction behaviour. From XPS the likely presence of Cr+6 on fresh Cr-O was found. On Cr-V-O, the possible reduction of V+5 and Cr+6 forms of the fresh sample to V+4, V+3 and Cr+3 states by TPR was discovered through XPS. With an O2/C2H6 fe

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9

Fröhlich, Thomas. "Novel, sequence-defined oligo (ethane amino) amides for siRNA delivery." Diss., lmu, 2012. http://nbn-resolving.de/urn:nbn:de:bvb:19-143311.

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10

Ricklund, Niklas. "Environmental occurrence and behaviour of the flame retardant decabromodiphenyl ethane." Doctoral thesis, Stockholms universitet, Institutionen för tillämpad miljövetenskap (ITM), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-34060.

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The environmental occurrence and behaviour of the brominated flame retardant (BFR) decabromodiphenyl ethane (dbdpe) has only been studied to a limited extent. It is structurally similar to decabromodiphenyl ether (decaBDE), which makes it conceivable that dbdpe may also become an environmental contaminant of concern. A method for environmental analysis and comparative assessments of dbdpe and decaBDE was developed. Both BFRs were studied in: a mass balance of the Henriksdal WWTP in Stockholm (Paper I); an international survey of sewage sludge (Paper II); sediment along a transect from Henriksd

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11

Rungta, Meha. "Carbon molecular sieve dense film membranes for ethylene/ethane separations." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/50121.

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The current work focused on defining the material science options to fabricate novel, high performing ethylene/ethane (C₂H₄/C₂H₆) separation carbon molecular sieve (CMS) dense film membranes. Three polymer precursors: Matrimid®, 6FDA-DAM and 6FDA:BPDA-DAM were used as precursors to the CMS membranes. CMS performances were tailored by way of tuning pyrolysis conditions such as the pyrolysis temperature, heating rate, pyrolysis atmosphere etc. The CMS dense film membranes showed attractive C₂H₄/C₂H₆ separation performance far exceeding the polymeric membrane performances. Semi-quantitative diffu

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12

Sonntag, Olivier. "The development of catalysts for the partial oxidation of ethane." Thesis, Nottingham Trent University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442097.

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13

Crabb, Eleanor Mary. "An investigation of the oxidative dehydrogenation of ethane and propane." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304514.

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14

Wurtele, Matthew. "Ethane Conversion to Ethylene in a Direct Hydrocarbon Fuel Cell." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/38818.

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Direct hydrocarbon fuel cells are fuel cells than use hydrocarbons directly as fuel instead of the most commonly used fuel in a fuel cell, hydrogen. Studies are being done on direct hydrocarbon fuel cells because they have the potential to be energetically more efficient than hydrogen fuel cells. There are many different hydrocarbons that are available to use as a feed stock and each one reacts at different reaction rates. As the current density of a fuel cell is linked to the reaction rate, it is important to know the energetics of an oxidation reaction that is occurring. Density Functional T

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15

Raggett, Charlotte. "The economics of extracting ethane in Alberta versus the United States." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ31304.pdf.

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16

Moradinia, Iraj. "The solubility of high molecular weight solid hydrocarbons in supercritical ethane." Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/11786.

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17

Salt, J. E. "[1,2-bis(dimethylphosphino)ethane] complexes on the first row transition metals." Thesis, Imperial College London, 1985. http://hdl.handle.net/10044/1/37844.

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18

Massey, Alan Robert. "The adsorption and oxidation of methane and ethane on Pd{100}." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610715.

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19

Walters, Kevin M. "A flow-reactor study of vitiated ethane oxidation at intermediate temperatures /." May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.

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20

Patterson, Claire Siobhan. "Portable spectroscopy system for ultra-sensitive, real-time measurement of breath ethane." Thesis, University of Glasgow, 2009. http://theses.gla.ac.uk/538/.

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This thesis describes the development, characterisation and application of a portable spectroscopy system for ultra-sensitive, real-time detection of breath ethane. In healthcare, breath ethane is a widely accepted marker of free radical-induced cell damage and may be used to indicate changes in oxidative stress. The aim was to deliver a compact instrument capable of long-term, on-site use in a clinical environment, while also retaining the high performance previously achieved by lab-based systems at the University of Glasgow. The newly developed instrument has a sensitivity of 70 parts per tr

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21

Velaga, Srinath Chowdary. "Stability of Methane-Ethane-Propane Mixed Gas Hydrates under Deep Water Conditions." Thesis, West Virginia University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3618152.

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<p> Methane hydrates are globally distributed in sediments along the continental margins and potentially contain more energy than all fossil fuel reserves. However, methane is also a potential greenhouse gas which could play a major role in global climate change. Understanding the stability of gas hydrates can help us to understand their role in the climate change. Three main factors affect the stability of hydrates: Temperature (<i>T</i>), Pressure (<i>P</i>) and composition. Hydrates become unstable when they are exposed to pressures and temperatures outside the hydrate stability zone (HSZ)

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22

Wong, Kae Shin. "Benzene alkylation with ethane into ethylbenzene over Pt-containing zeolite bifunctional catalysts." Thesis, University of Bath, 2009. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512307.

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Ethylbenzene (EB) is currently produced via acid catalyzed benzene alkylation with ethene, which is a product of highly endothermic and energy intensive processes. The new reaction, which uses ethane for benzene alkylation, instead of ethene, would eliminate the ethene production step, thus, leading to the commercial and environmental benefits in the EB manufacturing. Benzene alkylation with ethane into EB can be achieved using bifunctional zeolite catalysts, which combine ethane dehydrogenation into ethene over metal sites with benzene alkylation by ethene over BrÃ¸nsted acid sites. The benze

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23

Laffir, Fathima Riyaza. "Adsorption dynamics and reactivity of water and ethane on Pt{110}-(1x2)." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613092.

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24

Armstrong, Robert. "Partial oxidative upgrading of ethane with Fe- and Cu-ZSM-5 catalysts." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/59701/.

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The selective oxidation of lower alkane components of natural gas, such as ethane, to partial oxygenates remains a major challenge for both industry and academia. At present 60% of industry’s 7.8 Mt annual acetic acid demand is met through the carbonylation of methane, the operation of which is highly energy intensive, leads to formation of corrosive iodide by-products and requires high pressures of CO. Meanwhile ethene, a feedstock of great industrial importance, is produced via steam cracking of alkanes such as ethane, a process which is typically operated at > 800 oC and accounts for ca. 40

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25

Park, Justin Lane. "The Investigation of Nickel-Based Catalysts for the Oxidative Dehydrogenation of Ethane." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7393.

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The Investigation of Nickel-Based Catalysts for the Oxidative Dehydrogenation of Ethane Justin Lane ParkDepartment of Chemistry & Biochemistry, BYU Doctor of Philosophy Chemistry The advancement of creating ethylene from ethane via oxidative dehydrogenation (ODH) rather than the traditional direct dehydrogenation is right on the cusp of commercialization. The oxidative pathway provides a novel route that reduces the operating temperature of this reaction by 400-500°C. A variety of metals including Mo, V, and Ni that have redox properties suitable for the partial oxidation of small chain alkane

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26

Dasgupta, Debasis. "Studies on the transport properties of tetraalkylammonium salts in 2- methoxy ethanol, 1, 2- dimethoxy ethane and their aqueous binary mixtures." Thesis, University of North Bengal, 1987. http://hdl.handle.net/123456789/713.

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27

Wang, Weigang. "Reduced kinetic mechanisms for premixed laminar flames." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337792.

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28

Amey, David M. "Directing influences in the intra- and inter-molecular meta photocycloaddition of ethenes to the benzene ring." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388465.

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29

Warren, Richard. "Towards in-situ analysis of liquefied natural gas with near infrared spectroscopy." Thesis, University of Southampton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246257.

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30

Miller, Melanie Marie. "Multiphase equilibria behavior of carbon dioxide and ethane + hydrocarbon binary and ternary mixtures /." Access abstract and link to full text, 1988. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/8825490.

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31

Hodgetts, Robert William. "Excess enthalpies and excess volumes of binary mixtures containing carbon dioxide and ethane." Thesis, University of Bristol, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292452.

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32

Perez, Jeffrey A. "Evaluation of ethane as a power conversion system working fluid for fast reactors." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44836.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Nuclear Science and Engineering, 2008.<br>"June 2008."<br>Includes bibliographical references (p. 39-40).<br>A supercritical ethane working fluid Brayton power conversion system is evaluated as an alternative to carbon dioxide. The HSC® chemical kinetics code was used to study thermal dissociation and chemical interactions for ethane and other coolants under a variety of conditions. The NIST database was used for reaction rates. Overall results were not conclusive. The supercritical behavior of ethane at high pressures is not well

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33

Mondal, K. C. "Oxidative or non−oxidative conversion of methane or ethane into value added products." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2004. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2904.

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34

Hung, Jocelyn. "Effects of propane or ethane additives on laminar burning velocity of methane-air mixtures." Thesis, University of British Columbia, 1986. http://hdl.handle.net/2429/26297.

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Laminar burning velocities of stoichiometric methane-air, ethane-air, propane-air as well as methane with propane and ethane additives have been determined from pressure-time records during combustion in a constant-volume spherical combustion bomb with central ignition. Additives up to 20 volume percent were used. Initial pressure ranged from 1 to 8 atm. Results show that these additives increase the burning velocity of methane-air by an amount depending on the concentration and initial pressure. Ethane appeared to be more effective than propane for the same volume percent. Two analytical met

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35

Harris, Jonathan James Whithey. "Molecular beam study of the dissociation and reactivity of ethane on Pt{110}-(1x2)." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.603753.

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Supersonic molecular beam techniques were used to study the dissociative adsorption of ethane, C<sub>2</sub>H<sub>6</sub>, on Pt{110}-(1 x 2). The initial sticking probability of C<sub>2</sub>H<sub>6</sub> was measured using a novel form of the King and Wells method, for incident translational energies (E<sub>t</sub>) of 3.5 to 65 kJ mol<sup>-1</sup>. In addition to the high energy pathway reported previously, dissociation occurs through two lower-energy pathways, both of which are direct and activated. For E<sub>t</sub> £ 15 kJ mol<sup>-1</sup>, dissociation is strongly inhibited by vibration

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36

Edwards, Gillian. "Some studies of Leydig cell cytotoxicity ethane-1,2-dimethane sulphonate in the male rat." Thesis, University of Manchester, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328323.

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37

Walker, Brian Christopher. "SHOCK-TUBE INVESTIGATION OF IGNITION DELAY TIMES OF BLENDS OF METHANE AND ETHANE WITH OXYGEN." Master's thesis, University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3473.

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The combustion behavior of methane and ethane is important to the study of natural gas and other alternative fuels that are comprised primarily of these two basic hydrocarbons. Understanding the transition from methane-dominated ignition kinetics to ethane-dominated kinetics for increasing levels of ethane is also of fundamental interest toward the understanding of hydrocarbon chemical kinetics. Much research has been conducted on the two fuels individually, but experimental data of the combustion of blends of methane and ethane is limited to ratios that recreate typical natural gas compositio

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38

Jawad, Shadwan Hamid. "Thermal conductivity of polyatomic gases." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367922.

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39

Pham, Thi Lan Huong. "Synthèse et caractérisation des carbures de tungstène : application à l'isomérisation du n-heptane." Paris 6, 2002. http://www.theses.fr/2002PA066501.

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40

Kierkegaard, Amelie. "PBDEs in the Environment : Time trends, bioaccumulation and the identification of their successor, decabromodiphenyl ethane." Doctoral thesis, Stockholm : Department of Applied Environmental Science (ITM), Stockholm University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-6779.

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41

Fröhlich, Thomas [Verfasser], and Ernst [Akademischer Betreuer] Wagner. "Novel, sequence-defined oligo (ethane amino) amides for siRNA delivery / Thomas Fröhlich. Betreuer: Ernst Wagner." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2012. http://d-nb.info/1022791117/34.

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42

Chua, Li Min. "Deactivation of PtH-ZSM-5 bifunctional catalysts by coke formation during benzene alkylation with ethane." Thesis, University of Bath, 2010. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518282.

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The alkylation of benzene with ethane was studied at 370 oC over two Pt-containing ZSM-5 catalysts with SiO2/Al2O3 ratios of 30 and 80. While the benzene and ethane conversion decreased with time-on-stream for the PtH-ZSM-5(30) catalyst, the PtH-ZSM-5(80) catalyst demonstrated a stable performance. The deactivation of the PtH-ZSM-5(30) catalyst was found to be more significant, when compared to the PtH-ZSM-5(80) catalyst as a result of differences in the formation of coke. Results from gas sorption and x-ray diffraction experiments showed that coke is preferentially formed within the channel s

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43

Mulla, S. A. R. "Oxidative conversion of methane, ethane or natural gas to ethylene in an energy efficient manner." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 1997. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3233.

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44

Glasier, Greg F. "Molecular growth, aerosol formation and pyrolytic carbon deposition during the pyrolysis of ethane at high conversion." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0034/NQ66664.pdf.

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45

Lam, Daniel H. "Multiphase equilibrium behavior of ethane, nitrous oxide and carbon dioxide + n-alkanol binary and ternary mixtures /." Access abstract and link to full text, 1990. http://0-wwwlib.umi.com.library.utulsa.edu/dissertations/fullcit/9034205.

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46

Zhou, Zheng. "The Investigation of Functionalized Carbon Nanotubes for the Carbon Dioxide Capture and Ethane Oxidative Dehyrogenation Catalysts." BYU ScholarsArchive, 2020. https://scholarsarchive.byu.edu/etd/8417.

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Carbon nanotubes (CNT) have gained interest for wide use as both support and catalyst due to the ease of uniquely tunable surface chemistry. Increasingly severe greenhouse effects have attracted attention to novel materials and technologies capable of capturing carbon dioxide (CO2). In this context, we develop a CNT based solid state amine for the CO2 capture. CNT are functionalized under various methods as a support for polymeric amines. Polyethyleneimine are physically adsorbed on CNT and are further characterized and studied for reversible CO2 capture. We obtain a high CO2 capture capacity

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47

Fuller, Anshuman. "Novel Perovskite-based electro-catalysts for Oxidative Dehydrogenation (ODH) of Ethane in an Electrochemical Membrane Reactor." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1439880541.

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48

Etoumi, Assma S. Abdalla. "Hybrid membrane-distillation separation for ethylene cracking." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/hybrid-membranedistillation-separation-for-ethylene-cracking(aee59d9f-61a3-4edf-8d22-0123fb6e942e).html.

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Gas separations are often required in chemical processes, e.g. air separation, ethylene production, etc. These are often challenging and costly processes because of the low temperature and high pressure needed if vapour-liquid phase separations are involved. This thesis focuses on hybrid membrane-distillation separations as an opportunity to develop more energy-efficient separation processes. In a typical ethylene plant, recovery, the separation and purification of the cracked product are economically important. The focus of this thesis is on the ‘C2splitter’ which separates the desired produc

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49

Sigurbjornsson, Omar Freyr. "Vibrational dynamics of icy aerosol particles : phase transitions and intrinsic particle properties." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/2795.

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Phase transitions and other intrinsic properties (shape, size, architecture) of molecularly structured aerosol particles are important for understanding their role in planetary atmospheres and for technical applications. By combining bath gas cooling with time resolved mid-infrared spectroscopy and modeling, information is obtained on dynamic processes and intrinsic properties of fluoroform and ethane aerosol particles. The distinct infrared spectral features of fluoroform aerosol particles make it a particularly suitable model system. Homogeneous crystallization rates of the sub-micron sized

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50

Kakou, Yao Rita Carolina Angora. "Ethane et 1,2-dideutérioéthane : Spectre IR-TF et photoisomérisation induite par irradiation infrarouge sélective en matrices cryogéniques." Aix-Marseille 1, 1990. http://www.theses.fr/1990AIX11285.

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La photorotamerisation induite par irradiation infrarouge selective du 1,2-dideuterioethane ch#2d-ch#2d piegee en matrices de gaz rare pose le double probleme de la relaxation intramoleculaire du mode excite sur le mode de rotation interne et de la relaxation intermoleculaire par interaction de l'espece excitee avec son environnement. Cette molecule presente deux conformeres stables (une forme gauche de symetrie c#2 et une forme trans(anti) de symetrie c#2#h). Nous avons montre que la molecule piegee en matrice de xenon presente un mode b a 1046,85 cm#8#1 de la forme gauche du ch#2d-ch#2d reso

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