Tesis sobre el tema "Mixed Oxide Catalyst"
Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros
Consulte los 50 mejores tesis para su investigación sobre el tema "Mixed Oxide Catalyst".
Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.
También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.
Explore tesis sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.
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.
Texto completoLa contaminación ambiental mediante compuestos policlorados aromáticos y alifáticos es de gran preocupación. La reacción de hidrodecloración catalítica selectiva (HDC) se presenta como una nueva tecnología eficaz para una eliminación segura de estos tipos de compuestos orgánicos clorados. Es por ello, que este trabajo de investigación se ha enfocado en el estudio de nuevos catalizadores activos, selectivos y estables en diferentes reacciones de hidrodecloración de dos familias de compuestos orgánicos clorados: 1,2,4-triclorobenceno (1,2,4-TCB-compuestos aromáticos clorados) y el tricloroetileno (representativo de un compuesto clorado alifático). La primera parte de la tesis relacionadas con el HDC de 1,2,4-TCB, tiene como objetivo la obtención de catalizadores activos y estables para la hidrogenación del enlace C-Cl en compuestos aromáticos y la obtención final del compuesto aromático orgánico declorado. Mientras que la segunda parte tiene por objeto la obtención de catalizadores que permitan una gran selectividad a etileno y no hacia etano (hidrogenación profunda del tricloroetileno) durante la HDC de tricloroetileno. Por otra parte se ha realizado un estudio profundo en la síntesis de estos nuevos catalizadores, así como en la caracterización de los centros activos de dichos catalizadores, para su correlación con la actividad, selectividad y estabilidad de dichos catalizadores. Presenta ideas originales, lo que podría encontrar una aplicación práctica, para el tratamiento de compuestos órgano-halogenados contaminantes.
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.
Texto completoRico, Francés Soledad. "Pt/TixCe(1-x)O2 catalysts for PROX reaction". Doctoral thesis, Universidad de Alicante, 2015. http://hdl.handle.net/10045/50208.
Texto completoWhittle, 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.
Texto completoKarslioglu, 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.
Texto completoIn this work, a model-catalyst approach has been taken to study oxide mixtures containing molybdenum and titanium. The layers were prepared on TiO2(110) single crystals by evaporating the metals in an O2 atmosphere or in UHV and post treating the deposited material. Different preparation procedures were employed in the study and these are presented in six categories. When Mo and Ti were co-deposited in O2, most of the molybdenum stayed at the surface with only a small Mo concentration in deeper layers. Mixing of Mo into TiO2 was very limited, consistent with the phase diagram of MoO2 and TiO2. Mo6+ and Mo4+ were the dominant oxidation states in most of the layers and Mo6+ was always nearer to the surface than Mo4+. Layers where Mo was completely mixed into TiO2 could be prepared by depositing metals in UHV and post-oxidizing the deposited material. Inside the TiO2 lattice, Mo had an oxidation state of 4+. Depositing Mo in O2 at room temperature and post annealing in UHV led to the formation of two types of features in the STM images. These features were stable in UHV up to at least 1000 K. The layers with high Mo concentrations appeared patchy in the STM images but they still exhibited the TiO2(110)-(1x1) LEED pattern. The increase in Mo concentration led to the blocking of the bridging oxygen vacancies (BOVs) as evidenced by STM and water TPD. The reactivities of the layers were tested by methanol and ethanol TPD. An unprecedented high temperature (~650 K) formaldehyde/methane formation channel was observed in the methanol TPD of clean TiO2(110) and was associated with BOVs. The increase in the Mo concentration led to the vanishing of this channel as well as the ethylene formation channel (~600 K) in the case of ethanol TPD. In both ethanol and methanol TPD, new reaction channels towards ethylene and methane formation at ~500 K appeared.
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/.
Texto completoMin, 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.
Texto completoBeppu, Kosuke. "Studies on Sr-Fe Mixed Oxides for Purifying Automotive Exhaust Gas". Kyoto University, 2018. http://hdl.handle.net/2433/232055.
Texto completoBeckler, Robert Kendall. "Polynuclear metal complexes as model mixed oxide catalysts". Diss., Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/11897.
Texto completoZheng, 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.
Texto completoCau, 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.
Texto completoCerium-zirconium mixed oxides are at the heart of numerous research subjects. Indeed, these materials are used in different fields of application, and particularly in catalysis in three-way catalyst for automobile or for organic pollutant oxidation. The interest for this compound resides in its remarkable oxidoreduction properties, its oxygen storage capacity and its resistance to sintering. Consequently, numerous preparation methods have been developed and underline the high sensitivity of these oxides to the synthesis way. In the present work, two main synthesis have been employed, coprecipitation (aqueous medium) and diketonate degradation (non-aqueous medium). These syntheses have been realized with several techniques which are (i) heating at atmospheric pressure, (ii) hydrothermal treatment, (iii) sonolysis and (iv) combination of sonolysis and hydrothermal treatments, in a successive or simultaneous way. In order to realize this last and innovative method, a reactor allowing sonochemical treatment under high temperature and pressure has been developed. Under these conditions, the ultrasounds chemical activity has been proved during light or heavy water or hydrocarbon sonolysis. During the (Ce,Zr)O2 preparation, other parameters than the synthesis technique have been studied such as the surfactant presence or the solvent chain length. Thus, it has been shown that, in the case of aqueous synthesis, the use of the sonothermal reactor has a real effect on the specific surface area of the material in comparison of successive realization of sonochemical and hydrothermal treatments. Oxides with the more interesting structural properties have been selected for being used as supports of noble metal in the Pt/(Ce,Zr)O2 catalysts. The evaluation of the catalytic activity of these materials, during the catalytic wet air oxidation of formic acid, showed that it not only depends on the synthesis method, but also on the platinum deposition method and the pair platinum deposition method/support synthesis method
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.
Texto completoMotshweni, 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.
Texto completoWetwatana, Unalome. "Light Hydrocarbon conversion over mixed oxide catalysts". Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504936.
Texto completoRowbotham, 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.
Texto completoVäliheikki, 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.
Texto completoTiivistelmä Pakokaasupäästöissä olevat typen oksidit (NOx), hiilivedyt (HCs) ja hiilimonoksidi (CO) ovat haitallisia ihmisten terveydelle ja ympäristölle. Katalyysi on tehokas menetelmä vähentää näitä päästökomponentteja. Polttoaineet ja voiteluöljyt sisältävät epäpuhtauksia, jotka siirtyvät myös pakokaasuihin. Tästä johtuen pakokaasupäästöjen hallinnassa tarvitaan katalyyttimateriaaleja, joilla on hyvä vastustuskyky myrkyttymistä vastaan. Tavoitteena oli saada uutta tietoa kemiallisten epäpuhtauksien vaikutuksesta katalyyttien toimintaan. Biopolttoaineiden sisältämät mahdolliset epäpuhtaudet selvitettiin analysoimalla fossiilisen ja biopolttoaineen palamisessa muodostuvia partikkeleita ja vertaamalla niitä polttoaineiden hivenaineanalyysiin. Tutkimuksessa käytetyt zeoliitti (ZSM-5), cerium-zirkonium-sekaoksidi (CeZr) ja pii-zirkonium-oksidipohjaiset (SiZr) katalyytit käsiteltiin epäpuhtauksilla (kalium, natrium, fosfori ja rikki) kaasu- ja nestefaasissa. Tutkimuksessa käytettiin useita karakterisointitekniikoita, joiden avulla selvitettiin epäpuhtauksien vaikutuksia katalyyttien ominaisuuksiin. Katalyyttien toimintaa testattiin laboratoriomittakaavan kokeissa CO:n ja HC-yhdisteiden hapetuksessa sekä NOx:ien pelkistyksessä käyttäen ammoniakkia (NH3) tai vetyä (H2) pelkistimenä. Tulokset osoittavat, että CeZr-pohjaisten katalyyttien aktiivisuus NOx:ien pelkistyksessä oli hyvä käytettäessä pelkistimenä NH3:a ja kohtalainen käytettäessä vetyä. Rikki paransi CeZr-katalyyttien aktiivisuutta NOx:ien pelkistyksessä, mikä johtui kemiallisesti sitoutuneen hapen osuudesta katalyyttien pinnoilla. Vastaavasti hiilivetyjen ja CO:n hapetusreaktioissa rikki ei vaikuttanut SiZr-pohjaisten dieselhapetuskatalyyttien aktiivisuuteen. Sekä CeZr- ja SiZr-pohjaisia katalyytteja voidaan siten käyttää rikkiä sisältävien pakokaasujen puhdistuksessa. SiZr-pohjaisten katalyyttien aktiivisuus laski fosforin vuoksi. ZSM-5-pohjaiset katalyytit olivat vastustuskykyisiä kaliumille ja natriumille. Kestäviä katalyyttejä on siten kehitettävä, mikäli biopolttoaineiden sisältämien epäpuhtauksien poistaminen polttoaineista ei ole mahdollista
Yaseneva, Polina. "Selective oxidation of methanol on mixed oxide catalysts". Thesis, Cardiff University, 2011. http://orca.cf.ac.uk/54464/.
Texto completoJames, 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.
Texto completoWaldvogel, 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.
Texto completoThe environmental (global warming) and political (increase of the renewable electric farm) context leads to a mutation of the French energy landscape. Synthetic methane is presented as a energy carrier for storing and transporting renewable electricity in overproduction while recycling CO2, a process called Power-to-Methane. One of the objectives of the thesis is to develop an active catalyst for the co-methanation of a post-co-electrolysis mixture H2/CO/CO2/H2O/CH4 (CHOCHCO ANR project). A Ni/CZP type catalyst was synthesized in this purpose. The optimization of the coprecipitation synthesis by the combination of the precipitating salt (NH4)2CO3 and the surfactant CTAB has led to a high performance catalyst (absence of alkaline poison and increase of the specific surface area) able to produce CH4 at low temperature (250 °C) with a high yield. The catalyst showed a satisfactory resistance to carbon deposition and sintering deactivation, which is a key point for the intermittent operating conditions of the process. A kinetic model, of the Langmuir-Hinshelwood type, was developed for the first time on a Ni/CZP type catalyst
Ferguson, Jonathan. "Mixed metal oxide catalysts prepared using supercritical carbon dioxide". Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/54914/.
Texto completoOlcay, 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.
Texto completoCaglar, 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.
Texto completo#945
-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 impregnation. Prepared catalysts were characterized by BET, XRD and in-situ DRIFTS. Pt/BaO/CexZr1-xO2 catalysts (x= 0.75, 0.5, 0.25) exhibited higher surface than pure ceria and zirconia supported catalysts and highest surface was observed for Pt/BaO/Ce0.5Zr0.5O2. The reducibility of catalysts was tested by Temperature Programmed Reduction (TPR). It was observed that the reducibility of Pt/BaO/CexZr1-xO2 catalysts increases with incorporation of Zr into ceria lattice. Pt/BaO/Ce0.25Zr0.75O2 showed the highest reducibility. The Pt dispersions of catalysts were determined by CO chemisorption. The highest Pt disperison was observed in the presence of Pt/BaO/Ce0.5Zr0.5O2 catalyst. NOx storage and reduction efficiency of the catalysts were determined by transient reaction analysis in a home-built setup at 350oC. The reaction results revealed that all catalysts exhibit similar NOX storage and reduction performance. The NOX storage performances of all catalysts were differentiated via in-situ DRIFTS analysis. Pt/BaO/CexZr1-xO2 (x= 0.75, 0.5, 0.25) catalysts revealed higher performance than the ceria and zirconia supported catalysts. Pt/BaO/Ce0.5Zr0.5O2 catalyst absorbed highest amount of NO on the surface in the form of nitrate. The reduction behaviours of catalysts also were investigated by in-situ DRIFTS. It was observed that nitrates and nitrites were completely removed from the surface after reduction by H2 at 300oC.
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.
Texto completoJoshi, Suvid. "MIXED SURFACTANT SYSTEMS: THERMODYNAMICS AND APPLICATIONS IN METAL OXIDE IMPRINTING". UKnowledge, 2014. http://uknowledge.uky.edu/cme_etds/29.
Texto completoAL-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.
Texto completoYuan, 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.
Texto completoAdvisor: Dr. Vadim V. Guliants Title from electronic thesis title page (viewed May 7, 2008). Includes abstract. Includes bibliographical references.
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/.
Texto completoHong, 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.
Texto completoGonçalves, 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.
Texto completoPatil, 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.
Texto completoCabrera, 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.
Texto completoTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química
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
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 substituído por cromo na hidrotalcita MgAl nas proporções de 0, 5, 10, 50, 80 e 100% e as frações de cátions trivalentes x foram de 0,20, 0,25 e 0,33. Os materiais mostraram difratogramas de raios-X característicos de hidrotalcitas. A calcinação a 650°C das hidrotalcitas com 0 a 80% de substituição de alumínio resultou em óxidos mistos com estrutura de MgO, e a de materiais com 100% de substituição, em cromita de magnésio. As áreas BET dos materiais calcinados diminuíram com os aumentos do teor de cromo e da fração x, variando entre 90 e 309 m²/g. Os materiais não contêm microporos. A adsorção de CO2 mostrou que a densidade de sítios básicos diminui com os aumentos do teor de cromo e de x. Os testes catalíticos foram realizados num reator de leito fixo, à pressão atmosférica e temperaturas de 300 a 375°C. Os principais produtos foram n-butanol, éter etílico, acetaldeído e etileno, além de quantidades menores de butiraldeído, crotonaldeído e acetato de etila. A substituição de alumínio por cromo inibiu a formação de éter etílico e favoreceu a formação de acetaldeído. A substituição de 5 a 10% de alumínio por cromo resultou nas maiores conversões de etanol e nos maiores rendimentos de n-butanol. A presença da água na alimentação de etanol diminuiu as conversões. A promoção de catalisadores com sódio inibiu as reações, especialmente as de desidratação.
Abstract: Hydrotalcite-type materials, Mg1-x(Al,Cr)x(OH)2(CO3)x/2yH2O, were synthesized by coprecipitation from solutions containing magnesium, aluminium and chromium nitrates, calcined, characterized and tested for the conversion of ethanol. Aluminum was substituted by chromium in MgAl-hydrotalcite in amounts of 0, 5, 10, 50, 80 and 100 mol% and x-values of 0,20, 0,25 and 0,33. Powder X-ray diffraction patterns of the synthesized materials were typical of hydrotalcites. Calcination at 650°C of materials with aluminum yielded mixed oxides with diffraction patterns typical of MgO, and of materials without aluminum, that of magnesium chromite. BET areas of calcined materials increased with increasing chromium contents as well as with increasing x-values, varying between 90 and 309 m²/g. No material contained micropores. CO2 adsorption showed decreasing base site density as either the chromium content or the x-value was increased. Catalysts were tested at atmospheric pressure and temperatures of 300 to 375°C in a fixed bed reactor. Diethyl ether, n-butanol, acetaldehyde and ethylene were the main reaction products; small amounts of crotonaldehyde, butyraldehyde and ethyl acetate were also present. The presence of chromium in the catalysts inhibited diethyl ether formation while favoring acetaldehyde formation. The substitution of 5-10 mol% of aluminum by chromium resulted in the highest ethanol conversions and the largest overall yields of n-butanol. Lower conversions were obtained when water was added into the ethanol feed. Promotion of catalysts with sodium decreased conversions, particularly of dehydration reactions.
Doutorado
Desenvolvimento de Processos Químicos
Doutor em Engenharia Química
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.
Texto completoZhang, 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.
Texto completoKeenan, 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.
Texto completoXu, Yin. "Preparation of noble metal free mixed oxides : applications to environmental catalysis". Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1R070.
Texto completoIn a political and legislative context promoting the use of abundant and non-toxic metals, different classes of transition metal catalysts have been developed and evaluated for two depollution reactions: (i) catalytic ozonation or activated persulfate for the elimination of pollutants containing nitrogen in the aqueous phase and (ii) the catalytic oxidation of volatile organic compounds in the gas phase. Structural spinel oxides AB2O4 and perovskites having the general formula ABO3 (where A and B are metal cations) are interesting candidates because of their safety and lower cost compared to platinum family metals. Moreover, the versatile properties of these mixed oxides, such as the numerous possible compositions and their associated surface states, have demonstrated their interest in heterogeneous catalysis. In the first reaction concerning advanced oxidation processes, spinel type mixed oxides have been studied to act as a degradation catalyst for organic pollutants (AO7 and bisphenol A). Two compositions, CuAl2O4 and CuFe2O4, have been isolated as active catalysts for the activation of ozone and peroxymonosulphate radical precursors. The combination of copper with aluminum or iron has been found to be beneficial in forming reactive radicals from ozone or peroxymonosulphate, significantly improving the degradation of targeted pollutants compared with simple oxides. In the second reaction involving the catalytic oxidation of formaldehyde in the gas phase, the perovskites and the manganese oxides were evaluated. A study dealing with the surface enrichment of the transition metal was carried out either by chemical treatment via acid washing of the perovskite precursor, or by a sub-stoechiometric approach used during the preparation. At the light of the experimental results, this enrichment improves drastically the elimination of formaldehyde towards low temperatures. These performances can be related to the cumulative effects associated with the formation of a morphology containing a multiple porosity following the acidic chemical treatment, the significant increase of the specific surface and the increase of the density of the surface redox sites highlighted by the Mn4 + / Mn3 + couple. Finally, the promotion of the catalytic support LaMnO3 by alkali and alkaline earth metals was carried out according to different conditions (La0.8A0.2MnO3 with A = K, Na, Sr, Ca). Based on the catalytic performances at a temperature giving a conversion of 50% of formaldehyde in CO2, potassium doping proved to be the most attractive doping agent (La0.8K0.2MnO3> La0.8Na0.2MnO3> La0.8Sr0.2MnO3> LaMnO3 = La0. 8Ca0.2MnO3= LMO-OH = LMO-Na). Chemical aging under wet and dry conditions has therefore been carried out on the best catalysts to evaluate their robustness. Despite a conservation of textural properties, a gradual deactivation of the doped perovskites (K, Na, Sr) was observed and related to a loss of surface active oxygen species and a reduction in the average degree of oxidation of manganese
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.
Texto completoPena, 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.
Texto completoPenner, S. y 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.
Texto completoCan, 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.
Texto completo850°
C under atmospheric pressure.According to the reaction test results, the 0.5%Rh-Co-SBA15 catalyst shows the highest methane conversion (82%) and H2 selectivity. The non-precious metal show lower reactivities, addition of Pb to the Co-SBA-15 catalyst increases the catalytic activity and decrease the H2 production temperature.
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.
Texto completoABOU, 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.
Texto completoRödel, 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.
Texto completoFerrandon, 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.
Texto completoKolli, 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.
Texto completoBaker, 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.
Texto completoBeale, 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/.
Texto completoChen, 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.
Texto completoBHATT, 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.
Texto completoNovakova, Ekaterina Krasteva. "Catalytic studies of propane oxidation to acrylic acid on Mo-V-Sb-Nb mixed oxides catalysts". Thesis, University of Liverpool, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250417.
Texto completoVelasquez, Ochoa Juliana <1984>. "New Insights on the Mechanism of Interaction Between Light (bio) Alcohols and Metallic Mixed Oxides Catalysts". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7404/1/VelasquezOchoa_Juliana_Tesi.pdf.
Texto completo