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Dissertations / Theses on the topic 'Mixed Oxide Catalyst'

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1

Meshesha, Beteley Tekola. "Hydrodechlorination of chlorinated organic wastes over pd supported mixed oxide catalysts." Doctoral thesis, Universitat Rovira i Virgili, 2011. http://hdl.handle.net/10803/37352.

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Environmental pollution by polychlorinated chlorinated organic wastes is of great concern. Catalytic hydrodechlorination is considered clean and efficient methodology for safe disposal of chlorinated organic wastes. This work aims at studying the catalytic hydrodechlorination reaction for the removal of environmentally polluting chlorinated organic wastes: 1,2,4-trichlorobenzene (1,2,4-TCB) and Trichloroethylene (TCE). The research has focused on evaluation of the activity, selectivity and stability of newly synthesized Pd based catalysts for hydrodechlorination of 1,2,4-trichlorobenzene and t
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2

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.

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3

Rico, Francés Soledad. "Pt/TixCe(1-x)O2 catalysts for PROX reaction." Doctoral thesis, Universidad de Alicante, 2015. http://hdl.handle.net/10045/50208.

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The main objective of this Thesis is the synthesis, characterization and application in the PROX reaction of several series of catalysts synthesized using different methods, in order to find efficient materials with high catalytic activity. This work has been divided in six chapters. Chapter I presents an introduction about current energy problems and hydrogen (energy carrier) as a solution, with its limitations and advances on its use: storage, transport and security. Finally, its use as a fuel in PEMFC (Proton Exchange Membrane Fuel Cells) and the advantages comparing other existent fuel cel
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4

Whittle, David Mark. "The structural characterisation of mixed-oxide catalyst systems by high resolution- and scanning transmission microscopy techniques." Thesis, University of Liverpool, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263767.

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5

Karslioglu, Osman. "Structural and chemical characterizations of Mo–Ti mixed oxide layers." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2013. http://dx.doi.org/10.18452/16767.

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In dieser Arbeit wurde ein Modell-Katalysator-Ansatz angewandt um Mischoxide mit Molybdän und Titan zu untersuchen. Die Schichten wurden auf TiO2(110) Einkristallen durch Verdampfen der Metalle in einer O2 Atmosphäre und in UHV und Nachbehandlung der Filme vorbereitet. Verschiedene Präparationen wurden in der Studie untersucht und diese werden in sechs Kategorien dargestellt. Wenn Mo und Ti in O2 gemeinsam aufgedampft wurden, wurde das meiste Mo an der Oberfläche abgeschieden mit einer nur geringen Mo-Konzentration in tieferen Schichten. Eine Mischung von Mo in TiO2 war sehr begrenzt, und die
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6

MARIN, FIGUEREDO MIGUEL JOSE. "Metal Oxide Catalysts for the Abatement of Volatile Organic Compounds and Carbonaceous Particulate Matter." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2966339.

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7

Elfaki, Hind Omer Elsheikh. "Hydrogen production through sorption-enhanced steam reforming of ethanol using CaO-based sorbent mixed with iron oxide catalyst." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/31789/.

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Novel synthetic CaO-based sorbents for carbon dioxide (CO2) capture in sorption-enhanced steam reforming (SESR) were prepared by the co-precipitation method. Magnesium oxide (MgO) and cerium oxide (CeO2) were mixed with calcium oxide (CaO) in different molar percentages in order to obtain the optimum percentage, which provide high CO2 uptake capacity and cyclic stability. The TGA results for CO2 uptake, revealed that for the molar ratio of CaO, MgO and CeO2 of (6:2:1) and (4:2:1), the sorbents had CO2 capture capacity of 29 and 25 wt.%, respectively. The fresh sorbents were characterized using
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8

Min, Byoung Koun. "Scanning tunneling microscopic studies of SiO2 thin film supported metal nano-clusters." Diss., Texas A&M University, 2004. http://hdl.handle.net/1969.1/2737.

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This dissertation is focused on understanding heterogeneous metal catalysts supported on oxides using a model catalyst system of SiO2 thin film supported metal nano-clusters. The primary technique applied to this study is scanning tunneling microscopy (STM). The most important constituent of this model catalyst system is the SiO2 thin film, as it must be thin and homogeneous enough to apply electron or ion based surface science techniques as well as STM. Ultra-thin SiO2 films were successfully synthesized on a Mo(112) single crystal. The electronic and geometric structure of the SiO2 thin fil
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9

Beppu, Kosuke. "Studies on Sr-Fe Mixed Oxides for Purifying Automotive Exhaust Gas." Kyoto University, 2018. http://hdl.handle.net/2433/232055.

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10

Beckler, Robert Kendall. "Polynuclear metal complexes as model mixed oxide catalysts." Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/11897.

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11

Zheng, Zhanfeng. "Synthesis and modifications of metal oxide nanostructures and their applications." Thesis, Queensland University of Technology, 2009. https://eprints.qut.edu.au/31728/1/Zhanfeng_Zheng_Thesis.pdf.

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Transition metal oxides are functional materials that have advanced applications in many areas, because of their diverse properties (optical, electrical, magnetic, etc.), hardness, thermal stability and chemical resistance. Novel applications of the nanostructures of these oxides are attracting significant interest as new synthesis methods are developed and new structures are reported. Hydrothermal synthesis is an effective process to prepare various delicate structures of metal oxides on the scales from a few to tens of nanometres, specifically, the highly dispersed intermediate structures wh
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12

Cau, Camille. "Influence de la méthode de synthèse sur les propriétés structurales et catalytiques d'oxydes mixtes cérium-zirconium." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20192/document.

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Les oxydes mixtes de cérium-zirconium sont au cœur de nombreux sujets de recherche. En effet, ces matériaux sont utilisés dans différents domaines d'application, et tout particulièrement en catalyse, dans les catalyseurs trois voies en automobile ou pour l'oxydation de polluants organiques. L'intérêt pour ce composé réside dans ses propriétés remarquables d'oxydoréduction, sa capacité de stockage de l'oxygène et sa résistance au frittage. En conséquence, un nombre important de méthodes de synthèse ont été mises au point et soulignent la grande sensibilité de cet oxyde mixte à la voie de prépar
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13

DOSA, MELODJ. "Nanostructured ceria-based catalysts for automotive application - Formulation of nanostructured systems for diesel and gasoline-type engines." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2903500.

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14

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.

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15

Väliheikki, A. (Ari). "Resistance of catalytic materials towards chemical impurities:the effect of sulphur and biomaterial-based compounds on the performance of DOC and SCR catalysts." Doctoral thesis, Oulun yliopisto, 2016. http://urn.fi/urn:isbn:9789526212845.

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Abstract Exhaust gas emissions, e.g. nitrogen oxides (NOx), hydrocarbons (HCs) and carbon monoxide (CO), are harmful to human health and the environment. Catalysis is an efficient method to decrease these emissions. Unfortunately, the fuels and lubricant oils may contain chemical impurities that are also present in exhaust gases. Thus, catalytic materials with high activity and chemical resistance towards impurities are needed in the abatement of exhaust gas emission. In this thesis, the aim was to gain new knowledge about the effects of chemical impurities on the behaviour and activity of the
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16

Motshweni, Jim Sipho. "Synthesis of mixed metal oxides for use as selective oxidation catalysts." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/445.

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17

Wetwatana, Unalome. "Light Hydrocarbon conversion over mixed oxide catalysts." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504936.

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18

Rowbotham, Elizabeth Jane. "Propene oxidation on mixed metal oxide catalysts." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299302.

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19

Yaseneva, Polina. "Selective oxidation of methanol on mixed oxide catalysts." Thesis, Cardiff University, 2011. http://orca.cf.ac.uk/54464/.

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In the present work selective oxidation of methanol over the model Mo/Fe2O3 and Mo/Co(Zn) Fe2O4 systems has been investigated. It was shown that pure iron oxide and cobalt ferrite combust methanol to carbon dioxide and water. When molybdenum is loaded on the surface of iron oxide and calcined at 500 C, this leads to the formation of iron molybdate surface layer over Fe2C>3 core, which significantly changes selectivity in methanol oxidation towards partial oxidation products. The neighbouring Fe-Mo and Mo-Mo pairs of iron molybdate layer are responsible for the formation of carbon monoxide and
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20

James, David William. "Selective propene oxidation on mixed metal oxide catalysts." Thesis, University of Reading, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.252228.

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21

Waldvogel, Audrey. "Mise au point d'un catalyseur performant pour la chaîne de procédé Power-to-Methane et étude cinétique." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAF077/document.

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Le contexte environnemental (réchauffement climatique) et politique (augmentation du parc EnR) entraîne une mutation du paysage énergétique français. Le méthane de synthèse est présenté comme un vecteur énergétique permettant le stockage et le transport de l’électricité renouvelable en surproduction tout en recyclant le CO2 (Power-to-Methane). Un des objectifs de la thèse est de développer un catalyseur actif en co-méthanation d’un mélange post co-électrolyse H2/CO/CO2/H2O/CH4 (projet ANR CHOCHCO). Le catalyseur synthétisé est de type Ni/CZP. L’optimisation de la synthèse coprécipitation par l
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22

Ferguson, Jonathan. "Mixed metal oxide catalysts prepared using supercritical carbon dioxide." Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/54914/.

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The use of nitrate precursors for the production of mixed oxide catalysts such as iron molybdates and copper manganese oxides has been well documented in the literature. Nitrates have been used because of their high solubility and the ease of removal of the nitrate anion during calcination. In the case of copper manganese oxides, the use of chlorides and sulphates leads to the retention of the anion on the surface of the catalyst, using nitrates leaves no residue on the catalyst. The use of nitrates, however, is unfavourable due to the environmental issues associated with them. The main aim of
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23

Olcay, Hakan Onder. "Steam Reforming Of Ethanol Over Sol-gel-synthesized Mixed Oxide Catalysts." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606310/index.pdf.

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Depletion in the reserves of fossil fuels, inefficient energy production from these fuels and the negative effect of their usage on atmosphere, and thereby, on human health have accelerated researches on clean energy. Hydrogen produced from ethanol when used in fuel cells not only generates efficient energy but also creates a closed carbon cycle in nature. ZnO and Cu/ZnO catalysts are known with their superior performance in alcohol synthesis. From the principle of microkinetic reversibility they are expected to be superior catalysts for the steam reforming reaction of ethanol as well. ZnO ca
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24

Caglar, Basar. "Nox Storage And Reduction Over Ce-zr Mixed Oxide Supported Catalysts." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610418/index.pdf.

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NOx storage and reduction activities of Pt/BaO/CexZr1-xO2 (x= 1, 0.75, 0.5, 0.25, 0) catalysts were investigated by transient reaction analysis and Diffuse Reflectance Infrared Fourier Tramsform Spectroscopy (DRIFTS). Pt/BaO/Al2O3 catalyst was used as reference catalyst. Ce-Zr mixed oxides were synthesized by means of Pechini Method. Pechini method is a sol-gel like method based on mixing the related mixed oxide precursors with an &amp<br>#945<br>-hydroxy carboxylic acid. 10% BaO (w/w) and 1% Pt (w/w) were deposited on synthesized mixed oxide and reference alumina support via incipient wetness
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25

Hamid, Hamzah b. Abd. "Oxidative coupling of methane on samaria and on mixed oxide catalysts." Thesis, University of Hull, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335155.

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26

Joshi, Suvid. "MIXED SURFACTANT SYSTEMS: THERMODYNAMICS AND APPLICATIONS IN METAL OXIDE IMPRINTING." UKnowledge, 2014. http://uknowledge.uky.edu/cme_etds/29.

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In this work we study mixtures of cationic surfactant (CTAB) and sugar based surfactant(s) (octyl beta-D-glucopyranoside (C8G1), dodecyl maltoside (C12G2) and octyl beta-D-xylopyranoside (C8X1)) to understand the non-ideal thermodynamic behavior of the mixtures of cationic and non-ionic surfactants in water and synthesis of imprinted materials. The thermodynamics of micellization, mixing and dilution of these systems are studied using Isothermal Titration Calorimetry (ITC) and the experimental data obtained are modeled with a pseudo-phase separation model with non-ideal mixing described by reg
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27

AL-SAEEDI, JAMAL N. "MOLECULAR STRUCTURE-REACTIVITY RELATIONSHIPS FOR PROPANE OXIDATION OVER MODEL MIXED OXIDE CATALYSTS." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1053698262.

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28

Yuan, Li. "Mesoporous and macroporous mixed metal oxide MoVTeNbOx catalysts for propane (amm) oxidation." Cincinnati, Ohio : University of Cincinnati, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1199297348.

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Thesis (Ph. D. )--University of Cincinnati, 2008.<br>Advisor: Dr. Vadim V. Guliants Title from electronic thesis title page (viewed May 7, 2008). Includes abstract. Includes bibliographical references.
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29

Weightman, Gareth John. "The development of mixed oxide adsorbents and catalysts through continuous flow processes." Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/81820/.

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The aim of this project was to produce solid adsorbents and catalysts in a continuous flow process. These materials are traditionally made in a batch process. The materials were made and the effect of the change in synthesis explored. When hydrotalcite was produced in a batch process it was found to yield material that was synthesised by a reaction governed by thermodynamic control. Contrary, solid formation in a continuous flow it was found to be governed by a kinetically controlled reaction. During the batch reaction the reactants had time and mobility to precipitate, dissolve and re-precipi
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Hong, Won-Jong. "Direct Decomposition of NO over Ba-loaded Ce-based Mixed Oxide Catalysts." 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/142237.

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31

Gonçalves, Alexandre Amormino Dos Santos. "Development of Nanostructured Ceramic Catalysts Based on Mixed Metal Oxides." Kent State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1543412496976455.

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32

Patil, Aniket. "Simultaneous Fixed Bed Removal of Nitrogen Oxides and Mercury Using Manganese and Cerium Mixed Metal Oxide Catalysts at Low Temperature SCR." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1530266242697853.

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33

Cabrera, Navarrete Maria Elia. "Preparação, caracterização e propriedades cataliticas de hidrotalcitas MgAICr calcinadas na conversão de etanol." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267173.

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Orientador: Renato Sprung<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-14T09:58:31Z (GMT). No. of bitstreams: 1 CabreraNavarrete_MariaElia_D.pdf: 13508491 bytes, checksum: ed8e83647aa4fc77ef26b506eee4e91a (MD5) Previous issue date: 2007<br>Resumo: Materiais do tipo hidrotalcita Mg1-x(Al,Cr)x(OH)2(CO3)x/2yH2O foram sintetizados por coprecipitação a partir de nitratos de magnésio, alumínio e cromo. Os sólidos foram calcinados, caracterizados e testados na conversão de etanol. Na preparação, alumínio foi substitu
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34

Buchneva, O. "NANOSTRUCTURED MIXED OXIDES CATALYSTS: RELATIONSHIPS BETWEEN PHYSICAL-CHEMICAL AND CATALYTIC PROPERTIES." Doctoral thesis, Università degli Studi di Milano, 2010. http://hdl.handle.net/2434/150140.

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Perovskitic catalysts showed satisfactory activity for the low temperature flameless combustion of methane. This process allows to decrease the emission of CO, NOx and partially unburnt hydrocarbons. Partial substitution in the composition of perovskites may improve catalytic activity and it can modulate their resistance to sulphur poisoning. Samples with nominal composition La1-xA’xBO3, where A’= Sr, Ce, Ag, B=Co, Mn with x = 0; 0.05; 0.10, 0.20 and x%NB/LaBO3, where NB=Pt, Pd, Ag were prepared by flame spray pyrolysis (FP) and by the so-called sol-gel citrate method (SG). Temperature-progra
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35

Zhang, Hongxia. "Study of the effect of gold, platinum and vanadium oxide additives on the activity of TiO₂-ZrO₂ mixed oxide for the decomposition of CFC-22." HKBU Institutional Repository, 2002. http://repository.hkbu.edu.hk/etd_ra/367.

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36

Keenan, Matthew. "The influence of dopants on the surface properties of zirconia." Thesis, Nottingham Trent University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389703.

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37

Xu, Yin. "Preparation of noble metal free mixed oxides : applications to environmental catalysis." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1R070.

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Dans un contexte politique et législatif favorisant l’utilisation de métaux abondants et non toxiques, différentes classes de catalyseurs à base de métaux de transition ont été développées puis évaluées pour deux réactions de dépollution : (i) l’ozonation catalytique pour l’élimination de polluants en phase aqueuse et (ii) l’oxydation catalytique de composés organiques volatils en phase gazeuse. Les oxydes de structure type spinel AB2O4 et les pérovskites possédant la formule générale ABO3 (où A et B sont des cations métalliques) sont des candidats intéressants de par leur innocuité et leur pl
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38

PENA, DONOVAN ALEXANDER. "DEVELOPMENT AND CHARACTERIZATION OF MIXED OXIDE CATALYSTS FOR THE SELECTIVE CATALYTIC REDUCTION OF NITRIC OXIDE FROM STATIONARY SOURCES USING AMMONIA." University of Cincinnati / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1054307250.

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Pena, Donovan A. "Development and characterization of mixed oxide catalysts for the selective catlytic reduction of nitric oxide from stationary sources using amonnia." Cincinnati, Ohio : University of Cincinnati, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=1054307250.

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40

Penner, S., and H. Lorenz. "From Pure Oxides to Mixed Oxides: Model Systems for Structural and Catalytic Studies." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35049.

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As pure oxides and mixed oxide systems play an ever-increasing role in a variety of research fields ranging from catalysis over electrochemical applications to microelectronics, the present contribution aims at introducing a straightforward concept for the easy and reproducible preparation of well-defined and well-structured thin film model systems both for pure and mixed oxide systems. Exploiting the special structural and surface properties of vacuum-cleaved NaCl (001) growth templates, the concept is exempli-fied for the formation of nano-spheres (Ga2O3), nano-pyramids (In2O3), plates and n
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Can, Mukaddes. "Hydrogen Generation From Conventional Fuels Over Mesoporous Mixed Oxide Catalysts Under Time Interrupted Reaction Conditions." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12614520/index.pdf.

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In this study, catalytic activity of the Co and/or Pb-SBA-15 mesoporous catalysts in methane partial oxidation reaction was investigated. By using sol-gel, incipient wetness impregnation and post grafting method, SBA-15 samples are incorporated with Co and/or Pb at different weight loadings to provide a controlled geometry in nanometer scale. The characterization of the synthesized samples was done by XRD, N2 adsorption isotherms, FTIR, TEM images, Raman and XPS analysis. In the present study also, gas phase methane partial oxidation modeling and the synthesizing of mesoporous SBA-15 silica w
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42

YUAN, LI. "MESOPOROUS AND MACROPOROUS MIXED METAL OXIDE MoVTeNbO xCATALYSTS FOR PROPANE (amm) OXIDATION." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1199297348.

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43

ABOU, MRAD CHAFIC. "Synthese du methanol et d'alcools superieurs sur catalyseurs cuo-zno modifies." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13200.

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Mise au point sur la synthese du methanol en presence de cuo-zno et mise en evidence de l'influence du pretraitement et de l'effet benefique des promoteurs(cao,tho::(2),al::(2)o::(3), zro::(2),bao et sro)
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44

Kolli, T. (Tanja). "Pd/Al2O3 -based automotive exhaust gas catalysts:the effect of BaO and OSC material on NOx reduction." Doctoral thesis, University of Oulu, 2006. http://urn.fi/urn:isbn:9514280563.

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Abstract The aim of the thesis was to find new information on the effect of BaO and oxygen storage capacity material on NOx reduction. A total of nine different kinds of Pd/Al2O3-based metallic monoliths were studied. Promoters such as oxygen storage capacity material (OSC material in our case Cex-1ZrxO2 mixed oxides) and stabilisers such as barium (BaO) were added into the catalyst alone or together to improve catalyst properties such as catalytic activity, selectivity, and thermal stability. The key aspects in this thesis can be divided into four parts. First, the behaviour of NO reduction
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45

Rödel, Eva. "In situ bulk structural investigation of Mo5O14-type mixed metal oxide catalysts for partial oxidation reactions." [S.l.] : [s.n.], 2006. http://opus.kobv.de/tuberlin/volltexte/2007/1473.

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46

Ferrandon, Magali. "Mixed metal oxide - noble metal catalysts for total oxidation of volatile organic compounds and carbon monoxide." Doctoral thesis, Stockholm, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3156.

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47

Baker, John Edward. "An investigation of the factors affecting Cu/Co/Zn/Al mixed oxide catalysts for the formation of higher alcohols from syngas." Thesis, University of Reading, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254181.

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48

Beale, Andrew Michael. "Novel low temperature preparation methods for mixed complex oxide catalysts and their characterisation via in situ SR techniques." Thesis, University College London (University of London), 2003. http://discovery.ucl.ac.uk/1453143/.

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49

Chen, Luqian. "High throughput preparation and testing of SbMoVNb mixed oxide catalysts for selective oxidation of propane to acrylic acid." Thesis, University of Liverpool, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250441.

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50

BHATT, SALIL R. "SYNTHESIS, CHARACTERIZATION AND KINETIC STUDIES OF MIXED METAL Mo-V-Nb-Te OXIDE CATALYSTS FOR PROPANE AMMOXIDATION TO ACRYLONITRILE." University of Cincinnati / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1140626212.

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