Tesis sobre el tema "Sulfure de zirconium"
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Abdoulmoumine, Nourredine. "Sulfate and Hydroxide Supported on Zirconium Oxide Catalysts for Biodiesel Production". Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/33873.
Master of Science
Sharp, Conor Hays. "Fundamental Studies of the Uptake and Diffusion of Sulfur Mustard Simulants within Zirconium-based Metal-Organic Frameworks". Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/102928.
Doctor of Philosophy
Makhlouf, Sandy. "Modélisation et simulation de la structure électronique de petites molécules environnementales : Un exemple : les halogénures et monoxydes de Lanthanides (Ce et Lu)". Electronic Thesis or Diss., Université de Lille (2018-2021), 2021. http://www.theses.fr/2021LILUR042.
Our research work focuses on the theoretical investigation of the electronic structure of environmental diatomic molecules such as the cerium and the lutetium monoxides (CeO and LuO), the cerium monofluoride (CeF) and the zirconium monosulfide (ZrS). For these studies, we used ab initio quantum chemistry methods which encompass the Hartree-Fock methods, the complete active space self-consistent field (CASSCF) method and the multi-reference configuration interaction methods (ICMR) with single and double excitation. The MOLPRO software package is used to perform the calculations with and without the inclusion of the spin-orbit coupling. The Davidson's correction is considered and the calculations are elaborated in the C2v symmetry. For each molecule, corresponding atomic basis functions are adopted and theoretical models are tested. As result, the potential energy curves are plotted and then fitted to the Morse potential in order to determine the spectroscopic constants (the equilibrium electronic energy Te, the equilibrium internuclear distance Re, the harmonic ωe and anharmonic ωe vibrational constants and the rotational constant Be) of the electronic states 2S+1Lambda+/- and the respective Omega+/- components. The transition and permanent dipole moments are estimated for the Lambda+/- states. The Omega+/- components and the mixing percentages that provide the parental states Lambda+/- are obtained from the ICMRSD(+Q) calculations including the spin-orbit coupling.Our results with and without taking into consideration the spin-orbit effect are very satisfactory. They are compared with the experimental data and show good agreement and in general the relative error is found of less than 6% for all the spectroscopic constants of the studied molecules
Romano, Esteban Javier. "A surface science approach to understanding emission control catalyst deactivation due to sulfation of ceria-zirconia mixed-metal oxides". Master's thesis, Mississippi State : Mississippi State University, 2004. http://library.msstate.edu/etd/show.asp?etd=etd-03252004-162922.
Romano, Esteban Javier. "In-situ surface science studies of the interaction between sulfur dioxide and two-dimensional palladium loaded-cerium/zirconium mixed metal oxide model catalysts". Diss., Mississippi State : Mississippi State University, 2005. http://library.msstate.edu/etd/show.asp?etd=etd-04062005-093500.
Armendariz, Herrera Hector. "Préparation par méthode sol-gel et activation de catalyseurs zircone-sulfate pour l'hydroisomérisation d'alcanes". Montpellier 2, 1997. http://www.theses.fr/1997MON20009.
González, Arcos Angélica Viviana. "RhPt and Ni based catalysts for fuel reforming in energy conversion". Doctoral thesis, KTH, Kemisk teknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-160026.
QC 20150213
Hill, Melinda Lou. "Polymeric and Polymer/Inorganic Composite Membranes for Proton Exchange Membrane Fuel Cells". Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/37597.
Ph. D.
Kurdi, Mohamad. "Sur l'utilisation des sulfures en catalyse d'hydrotraitement le trisulfure du niobium /". Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb376148133.
Sinha, Majumdar Sreshtha. "Catalytic Reduction of Nitrogen Oxide Emissions with Lower Hydrocarbons for Natural gas-fired Lean-burn Engines". The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1471602998.
Bernasconi, Pascal. "Flottation ionique : Analyse des mécanismes pour les tensio-actifs, application à la purification de solutions uranifères". Nancy 1, 1986. http://www.theses.fr/1986NAN10117.
Pellegrini-Bonneau, Laurence. "Vaporeformage d'hydrocarbures lourds en présence de composés soufres". Poitiers, 1988. http://www.theses.fr/1988POIT2318.
Hsu, Tzu-Ling y 許紫菱. "Adsorption of Fluoride, Chloride, Bromide, Sulfate and Nitrate onto Novel Superparamagnetic Zirconia from Aqueous Solutions". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/30131617860325138565.
國立臺灣大學
環境工程學研究所
94
Two novel magnetic zirconia adsorbents were synthesized employing precipitation (called MZHP) and sol-gel (called MZSG) methods, respectively, in this study. However, only MZSG possessed homogeneous property so that MZSG was the main adsorbent discussed in this study. MZSG was prepared with three sequentical steps: formation of Fe3O4 (magnetitie) as magnetic core via precipitation method; coating of SiO2 (silica) film on magnetite as magnetic carrier with sol-gel method; coating of ZrO2 as magnetic adsorbent via sol-gel method. The physicochemical characteristics of adsorbents, adsorption behavior of various anions, such as F-, SO42-, Cl-, Br- and NO3-, and regeneration processes of aged adsorbents from fluoride adsorption were investigated. In addition, effects of operating parameters, such as ionic strength, pH value and initial concentration were also were also examined. Langmuir and Freundlich isotherms can well describe the adsorption of F- and SO42- on MZSG from solutions, and MZSG possessed high potentical to remove F- and SO42-. However, the adsoption capacities of Cl-, Br- and NO3- were considerably low. There sults indicated MZSG was a good adsorbent for selective adsorption of F- and SO42-.
Molele, Tebogo Amelia. "Tribocorrosion behaviour of copper and zirconia reinforced nickel-titanium shape memory composites". 2013. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000990.
StudIes the tribocorrosion behaviour of copper-nickel-titanium shape memory composite reinforced by zirconia,synthesized through powder metallurgy process. The research aims to achieve the following objectives: 1. Study the tribocorrosion mechanisms of the composites in NaCl solution (typical human body fluid). 2. Investigate the tribocorrosion mechanisms of the composites in other environments typical of some engineering applications.The proposed study on incorporating zirconia into the matrix NiTiCu through powder metallurgical process and investigations of the phenomenon of joint wear-corrosion synergism occurring in sodium chloride considered typical of human body system and sulphuric acid environment typical of wide range engineering applications is therefore very novel. It is therefore aimed that information on the tribocorrosion behaviour of NiTiCu as well as with zirconia incorporation will form basis for typical compositional formulation approaches for improved bio-tribocorrosion improvement in biomedical applications and actuators used in other engineering applications.
Eliades, John Alexander. "A Radio Frequency Quadrupole Instrument for use with Accelerator Mass Spectrometry: Application to Low Kinetic Energy Reactive Isobar Suppression and Gas–phase Anion Reaction Studies". Thesis, 2012. http://hdl.handle.net/1807/32706.