Tesi sul tema "Ethane"
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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/.
Testo completopatankar, 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.
Testo completoDucatel, 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.
Testo completoHaddleton, D. M. "Photochemistry of some metal-ethane complexes". Thesis, University of York, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374165.
Testo completoRose, 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.
Testo completoWells, 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.
Testo completoHacoob, Saboonchian Vahe. "Bis(Dimethylphosphino)ethane and related complexes of transition metals". Thesis, Imperial College London, 1991. http://hdl.handle.net/10044/1/46796.
Testo completoKaramullaoglu, 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.
Testo completoand 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 feed ratio of 0.17, Cr-O exhibited the highest total conversion value of about 0.20 at 447°
C with an ethylene selectivity of 0.82. Maximum ethylene selectivity with Cr-O was obtained as 0.91 at 250°
C. An ethylene selectivity of 0.93 was reached with the Cr-V-O at 400°
C. In the experiments performed by using CO2 as the mild oxidant, a yield value of 0.15 was achieved at 449°
C on Cr-O catalyst. In dynamic experiments performed over Cr-O, with C2H6 pulses injected into O2-He flow, the possible occurrence of two reaction sites for the formation of CO2 and H2O was detected. By Gaussian fits to H2O curves, the presence of at least three production ways was thought to be probable. Different from Cr-O, no CO2 formation was observed on Cr-V-O during pulsing C2H6 to O2-He flow. In the runs performed by O2 pulses into C2H6-He flow over Cr-V-O, formation of CO rather than C2H4 was favored.
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.
Testo completoRicklund, 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.
Testo completoAt the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: Submitted. Paper 4: Manuscript.
Rungta, Meha. "Carbon molecular sieve dense film membranes for ethylene/ethane separations". Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/50121.
Testo completoSonntag, 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.
Testo completoCrabb, 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.
Testo completoWurtele, 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.
Testo completoRaggett, 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.
Testo completoMoradinia, Iraj. "The solubility of high molecular weight solid hydrocarbons in supercritical ethane". Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/11786.
Testo completoSalt, 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.
Testo completoMassey, 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.
Testo completoWalters, 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.
Testo completoPatterson, 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/.
Testo completoVelaga, 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.
Testo completoMethane 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 (T), Pressure (P) and composition. Hydrates become unstable when they are exposed to pressures and temperatures outside the hydrate stability zone (HSZ) in a process commonly called dissociation. However, hydrates can also become unstable even when the pressure and temperature are within the HSZ but the concentrations of the hydrate forming gases are below their fully-saturated levels in the surrounding water phase. This process can be described as dissolution. In situ observations of marine outcrops of gas hydrates indicate that these hydrates exposed to surrounding seawater are more stable than predicted using diffusion-controlled models based on the surrounding methane saturations.
Naturally-occurring hydrates may not be simple structure I (sI) methane hydrates and may contain higher hydrocarbons like ethane, propane etc., which forms structure II (sII) hydrates. Therefore, these mixed hydrates may act to stabilize the hydrates. In this work, the dissolution of sII hydrates in the presence of water has been studied using molecular dynamics (MD) simulations to understand if and how the presence of ethane and propane may stabilize the hydrate. Lattice constants for sII hydrates were calculated and compared to experimental values to validate the OPLS potentials used for the hydrocarbon guest molecules. The effect of higher hydrocarbons, such as ethane and propane, on the stability of gas hydrate was studied by changing the composition in the hydrate phase keeping the methane composition constant in the large cage and small cages. Also, the effect of methane composition was also studied by changing the methane occupancy in large and small cages. MD simulations reveal that the fully occupied hydrate is more stable than the presence of empty cages. The number of methane molecules moved into the liquid phase from the hydrate phase has been increased with the decrease in the large cage occupancy. No effect was found on the dissolution of sII hydrate by changing the small cage occupancy from 100% to 81.5%. The dissolution of sII hydrate was linear in the first few nanometers of the simulations and then observed an oscillatory behavior; this oscillatory behavior is due to the hydrate formation and dissociation at the hydrate-water layer interface.
The probable phase in the marine sediments can be a two phase hydrate (H)-Liquid water (Lw) thermodynamic equilibrium in the absence of vapor phase. Understanding the fate and transport of hydrocarbons and hydrocarbon mixtures in the deepsea and underlying sediments requires accurate determination of this two phase H-Lw thermodynamic equilibrium in the absence of a free gas phase. In addition to controlling hydrate formation directly from the aqueous phase, the H-Lw equilibrium also provides the aqueous solubility of dissolving hydrate. The two phase H-Lw thermodynamic model is based on the van der Waals and Platteeuw model and the Holder model. The Langmuir constants, an important term, in the van der Waals Platteeuw model were calculated from cell potential parameters obtained from ab initio intermolecular potentials and the experimental data, i.e. it does not rely on empirical fitting parameters. Variable reference parameters were used for each guest molecule instead of using single value for all the guests. The Pitzer model was used to calculate the activity of seawater. The solubilities of pure methane, ethane, and propane in water at H-Lw equilibrium are compared to the available experimental data and shown to be as accurate as the experimental data. The model predictions show that the ratio of large to small cage occupancy decreasing with increase in temperature or pressure. The prediction of the model shows that at the two phase H-L w equilibrium in the presence of electrolytes forms the hydrate at lower pressures compares to the pure water at a given temperature and dissolved hydrocarbon solubility. Thus the presence of electrolyte promotes the hydrate formation rather than acting as an inhibitor. This is in reverse to that in the three phase vapor-liquidwater-hydrate (VLwH) region where it is well known that salts act as an inhibitor to hydrate formation. Finally, the methane-ethane-propane ratio from the Macondo oil spill had been used as a typical thermogenic hydrocarbon mixture and hydrocarbon solubilities at H-Lw equilibrium under deepsea conditions have been presented for pure water and seawater.
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.
Testo completoLaffir, 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.
Testo completoArmstrong, Robert. "Partial oxidative upgrading of ethane with Fe- and Cu-ZSM-5 catalysts". Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/59701/.
Testo completoPark, Justin Lane. "The Investigation of Nickel-Based Catalysts for the Oxidative Dehydrogenation of Ethane". BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7393.
Testo completoDasgupta, 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.
Testo completoWang, Weigang. "Reduced kinetic mechanisms for premixed laminar flames". Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337792.
Testo completoAmey, 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.
Testo completoWarren, 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.
Testo completoMiller, 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.
Testo completoHodgetts, 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.
Testo completoPerez, 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.
Testo completo"June 2008."
Includes bibliographical references (p. 39-40).
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 documented, and the recombination rates of its dissociation reactions could prove very important. Ethane is known to crack into ethylene, but computer simulations show that it can, at equilibrium, also form significant amounts of hydrogen and methane. These reactions cracked more than 25% of the ethane above 300°C, even though high (20 MPa) pressure significantly reduced dissociation compared to results at 0.1 MPa. At high pressure it appears that ethane might recombine much faster than it dissociates, which would be highly advantageous. Further research and experimentation is encouraged. Simple experiments should be sufficient to identify the behavior of ethane at high temperatures and pressures. Ethane was calculated to have better heat transfer properties than carbon dioxide. In particular, heat exchanger sizes could be reduced by as much as a factor of three. On the other hand, more turbomachinery stages are needed. A simple experiment is proposed to determine whether recombination under compressor inlet conditions is sufficiently fast and complete to make the use of ethane a practical proposition. The chemical reaction of ethane with sodium, while it generates hydrogen, is endothermic, which may quench the reaction in the event of small heat exchanger leakage.
by Jeffrey A. Perez.
S.B.
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.
Testo completoHung, 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.
Testo completoApplied Science, Faculty of
Mechanical Engineering, Department of
Graduate
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.
Testo completoEdwards, 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.
Testo completoWalker, 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.
Testo completoM.S.A.E.
Department of Mechanical, Materials and Aerospace Engineering;
Engineering and Computer Science
Aerospace Engineering MSAE
Jawad, Shadwan Hamid. "Thermal conductivity of polyatomic gases". Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367922.
Testo completoPham, 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.
Testo completoKierkegaard, 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.
Testo completoFröhlich, Thomas [Verfasser], e 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.
Testo completoChua, 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.
Testo completoThe location of the coke deposition was found to affect the product selectivity of the two PtH-ZSM-5 catalysts. The accessibility functions, derived from nitrogen and argon sorption data, suggested that, with prolonged time-on-stream, the coke molecules build up from the middle of the zeolite crystallites outwards towards the surface, as the reaction was carried out over the PtH-ZSM-5(30) catalyst. Partial blockage of the internal pore structure of the PtH-ZSM-5(30) catalyst decreased the diffusion length within the crystallites. In contrast to the typical effect of coking, where the selectivity of para- isomers would be enhanced with coke deposition, the effect of the reduction in the diffusion length of the PtH-ZSM-5(30) crystallites is consistent with the decreasing para-selectivity of the diethylbenzene (DEB) isomers with time-on-stream.
n investigation of the causes of coke locations was conducted, and the results suggested that, the spatial distribution of Pt metal was responsible for the different locations of coke observed. Surface reactions initiated coking in the intercrystalline region of the PtH-ZSM-5(80) catalyst, as the Pt particles on the surface of the PtH-ZSM-5(80) crystallites increased the difficulty of access for reactants to the interior of the crystallites. Within the PtH-ZSM-5(30) catalyst, ethane dehydrogenation and benzene alkylation took place in the micropore network as a result of preferential intracrystalline deposition of Pt metal. Further conversions on the active sites within the PtH-ZSM-5(30) crystallites thus lead intracrystalline coking.
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.
Testo completoGlasier, 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.
Testo completoLam, 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.
Testo completoZhou, 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.
Testo completoFuller, 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.
Testo completoEtoumi, 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.
Testo completoSigurbjornsson, 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.
Testo completoKakou, 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.
Testo completo