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Дисертації з теми "Catalysie"

Автор: Grafiati
Опубліковано: 16 листопада 2024

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1

Grieco, Francesco. "Le rôle de la poussière carbonée dans le milieu interstellaire en tant que catalyseur pour la formation de molécules et la croissance des grains." Electronic Thesis or Diss., CY Cergy Paris Université, 2024. http://www.theses.fr/2024CYUN1306.

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Анотація:
Cette thèse présente une étude complète de l'interaction entre les grains de poussière et diverses espèces en phase gazeuse dans le milieu interstellaire. Les principaux résultats impliquent l'utilisation de surfaces comme la glace et le coronène, une surface qui ressemble aux hydrocarbures aromatiques polycycliques (PAH), avec des éléments H et O en phase gazeuse. Nous étudions comment les grains de poussière peuvent catalyser la formation de nouvelles molécules par des processus comme l'adsorption, la diffusion, les réactions de surface et la désorption dans des conditions typiques du milieu
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2

Fiske, Thomas Haukli. "Correlation of Catalyst Morphology with Attrition Resistance and Catalytic Activity of Fischer-Tropsch Catalysts." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for kjemisk prosessteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-22778.

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Анотація:
Three alumina based support materials for the Fischer-Tropsch synthesis (FTS) catalyst has been prepared and investigated. The three support materials were prepared in order to obtain different mechanical strengths, henceforth denoted weak, medium and strong support. Magnesium modified γ-alumina support material calcined at 950°C and 1050°C were prepared as the medium and strong support respectively, whereas the unmodified alumina was used as the weak support. The modified support materials were both prepared by the incipient wetness impregnation method to obtain 10 wt .% Mg
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3

Paliga, James Francis. "Developing Earth-abundant metal-catalysts for hydrofunctionalisation." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31115.

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Анотація:
The iron-catalysed hydromagnesiation of styrene derivatives has been developed further from previous publications, expanding the electrophile scope to enable the regioselective formation of new carbon-carbon and carbon-heteroatom bonds (Scheme A1). A commercially available pre-catalyst and ligand were used to give an operationally simple procedure that did not require prior synthesis of a catalyst. This work also investigated the hydromagnesiation of dienes, using a screen of ligands commonly used in transition metal catalysis. An investigation into the magnesium-catalysed hydroboration of ole
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4

Large, Benjamin. "Activation sélective de naphtalènes et synthèse d'architectures polycycliques étendues." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLV070/document.

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Анотація:
Comme le naphtalène a récemment émergé comme un socle fondamental en chimie médicinale, le développement de méthodologies menant à des plateformes fonctionnalisées basées sur du naphtalène est devenu un centre d’intérêt majeur de la communauté scientifique. En effet, des conditions expérimentales optimisées sur le benzène ou d’autre noyaux aromatiques ne peuvent pas toujours être transposées au naphtalène. Ces dernières peuvent parfois conduire à des résultats différents, possiblement dû à l’aromaticité plus faible de ce bicycle aromatique.Dans ce contexte, cette thèse s’articule autour du nap
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5

Meyer, Simon [Verfasser]. "Carbide Materials as Catalysts and Catalyst Supports for Applications in Water Electrolysis and in Heterogeneous Catalysis / Simon Meyer." München : Verlag Dr. Hut, 2014. http://d-nb.info/1058284967/34.

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6

Hruby, Sarah Lynn. "Catalytic domains in porous catalysts." [Ames, Iowa : Iowa State University], 2009.

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7

McGregor, James. "Heterogeneous catalytic hydrogenation and dehydrogenation : catalysts and catalytic processes." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612796.

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8

Richardson, John Michael. "Distinguishing between surface and solution catalysis for palladium catalyzed C-C coupling reactions: use of selective poisons." Diss., Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22704.

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Анотація:
This work focuses on understanding the heterogeneous/homogeneous nature of the catalytic species for a variety of immobilized metal precatalysts used for C-C coupling reactions. These precatalysts include: (i) tethered organometallic palladium pincer complexes, (ii) an encapsulated small molecule palladium complex in a polymer matrix, (iii) mercapto-modified mesoporous silica metalated with palladium acetate, and (iv) amino-functionalized mesoporous silicas metalated with Ni(II). As part of this investigation, the use of metal scavengers as selective poisons of homogeneous catalysis is intr
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9

Gill, Christopher Stephen. "Novel hybrid organic/inorganic single-sited catalysts and supports for fine chemical and pharmaceutical intermediate synthesis." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/28218.

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Анотація:
Thesis (M. S.)--Chemical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Jones, Christopher; Committee Member: Agrawal, Pradeep; Committee Member: Teja, Amyn; Committee Member: Weck, Marcus; Committee Member: Zhang, John.
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10

Nguyen, Joseph Vu. "Design, synthesis, and optimization of recoverable and recyclable silica-immobilized atom transfer radical polymerization catalysts." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6860.

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Анотація:
Despite the growing interest in heterogeneous polymerization catalysis, the majority of the polymerization catalysts used industrially are single-use entities that are left in the polymer product. Recoverable and recyclable polymerization catalysts have not reached the industrial utility of single-use catalysts because the catalyst and product separation have not become economical. The successful development of recyclable transition metal polymerization catalysts must take a rational design approach, hence academic and industrial researchers need to further expand the fundamental science and
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11

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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12

Liu, Hongying. "Syntheses, structures, and catalysis of polynuclear metal complexes." Diss., Georgia Institute of Technology, 1989. http://hdl.handle.net/1853/30561.

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13

Damian, Karen Serena. "Pd catalysed synthesis of phosphines for homogeneous catalysis." Thesis, St Andrews, 2009. http://hdl.handle.net/10023/907.

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14

Clarke, Richard John. "Mesopore immobilised bis(oxazoline) catalysts for enantioselective catalysis." Thesis, University of Birmingham, 2003. http://etheses.bham.ac.uk//id/eprint/3578/.

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Анотація:
Mesoporous silica materials have the potential to replace many conventional silicas for uses such as supports for heterogeneous catalysis and absorbents. The large pore size and high surface area make them ideal for supporting bulky organometallic catalysts for enantioselective reactions. We have immobilised chiral bis(oxazoline) metal complexes onto the surfaces of some of these versatile supports (MCM-41 and MCM-48) via different tethering strategies. The resulting heterogeneous catalysts were shown to be highly active in the enantioselective cyclopropanation of styrene with ethyl diazoaceta
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15

Jenkins, Patrick L. "Electrochemical and catalytic investigation of catalysis by gold." Thesis, Cardiff University, 2005. http://orca.cf.ac.uk/56012/.

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Анотація:
The performance of gold/graphite as an oxidation catalyst has been investigated in an electrochemical cell (electrooxidation at ambient temperature and pressure) and in a high pressure reactor (conventional catalytic oxidation typically at 3 bar and 333 K). A range of gold/graphite catalysts having various metal loadings were prepared and characterised by cyclic voltammetry (CV), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). The technique of lead underpotential deposition (Pdupd) was used to reveal the presence of {111}, {100}, and {110} facets in the surf
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16

Xu, Jiahui. "Catalytic properties of nano ceria in heterogeneous catalysis." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:02e68ff9-ce28-475a-bd08-6b60bcda64e7.

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Анотація:
There have been many applications of cerium oxide in oxidation catalysis but the understanding of its role in catalysis is rather limited. This research is concerned with the use of nano-size cerium oxide in methane steam reforming reaction. It is found that addition of cerium oxide to the commercial supported Ni catalysts can dramatically reduce the undesirable carbon deposition (through surface oxidation), which is thermodynamically favorable under low steam conditions. In order to understanding the fundamental role of oxidation activity of the cerium oxide, different sizes of nano-crystalli
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17

Rosenthal, Daniel Jay. "Estimating the acid site density of silica-alumina by infrared spectroscopy using a selective reactant poison." Thesis, Georgia Institute of Technology, 1985. http://hdl.handle.net/1853/10222.

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18

Nixon, David J. "Catalytic behaviour of nickel-based catalysts operating on simulated biogas : optimisation through oxygen addition, temperature variation and catalyst modification." Thesis, Keele University, 2013. http://eprints.keele.ac.uk/3818/.

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Анотація:
The use of catalytic systems operating on waste products such as biogas offers a potentially attractive alternative for renewable and sustainable energy generation. To investigate the potential viability of such catalytic systems for operation on biogas, a detailed study of nickel-based catalysts for the reforming of simulated biogas (methane:carbon dioxide = 2) to synthesis gas has been undertaken. The influence of oxygen addition in varied concentrations to the simulated biogas mixture has been investigated with regards to catalyst activity, selectivity and stability. This influence has been
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19

Guo, Chris. "Alkane Oxidation Catalysis by Homogeneous and Heterogeneous Catalyst." Thesis, The University of Sydney, 2005. http://hdl.handle.net/2123/622.

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Анотація:
Abstract Cobalt-based complexes are widely used in industry and organic synthesis as catalysts for the oxidation of hydrocarbons. The Co/Mn/Br (known as "CAB system") catalyst system is effective for the oxidation of toluene. The Co/Mn/Br/Zr catalyst system is powerful for the oxidation of p-xylene, but not for the oxidation of toluene. [Co3O(OAc)5(OH)(py)3][PF6] (Co 3+ trimer 5) is more effective than [Co3O(OAc)6(py)3][PF6] (Co 3+ trimer 6) as a catalyst in the CAB catalyst system. Higher temperatures favour the oxidation of toluene. Zr 4+ does not enhance the oxidation of toluene. Zr
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20

Guo, Chris. "Alkane Oxidation Catalysis by Homogeneous and Heterogeneous Catalyst." University of Sydney. Chemistry, 2005. http://hdl.handle.net/2123/622.

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Анотація:
Abstract Cobalt-based complexes are widely used in industry and organic synthesis as catalysts for the oxidation of hydrocarbons. The Co/Mn/Br (known as "CAB system") catalyst system is effective for the oxidation of toluene. The Co/Mn/Br/Zr catalyst system is powerful for the oxidation of p-xylene, but not for the oxidation of toluene. [Co3O(OAc)5(OH)(py)3][PF6] (Co 3+ trimer 5) is more effective than [Co3O(OAc)6(py)3][PF6] (Co 3+ trimer 6) as a catalyst in the CAB catalyst system. Higher temperatures favour the oxidation of toluene. Zr 4+ does not enhance the oxidation of toluene. Zr
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21

Solmi, Matilde Valeria. "Synthèse d'acides carboxyliques à partir de substrats oxygénés, de CO2 et de H2." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1287/document.

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Анотація:
Les acides carboxyliques aliphatiques sont utilisés dans de nombreux secteurs industriels et leur importance économique augmente. Ils sont actuellement produits en grande quantité, grâce à des procédés utilisant le C0 qui est principalement non- renouvelable. L'anhydride carbonique est une molécule potentiellement écologique, renouvelable et abondante. Cette thèse décrit l'étude et l'optimisation d'un système catalytique homogène de Rh, utilisé pour produire des acides carboxyliques aliphatiques à partir de substrats oxygénés, C02 et H2. Le système consiste en un précurseur de Rh, un additif à
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22

Ellis, Ieuan. "Interstitial modification of palladium for partial hydrogenation reactions." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:7c8c294c-0583-4a61-98e5-4c32d76cbf89.

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Анотація:
Heterogeneous catalysis is a key industrial process involved in the synthesis of nearly all chemicals currently produced. The environmental impact of these processes is huge so improvements must be made to current catalysts. Should a new material provide better yields at lower energy cost the benefits to both the industry and the planet are significant. There are many ways to change the behaviour of a catalyst, the addition of dopants, the selective blocking of active sites, and changing the strength of the support interaction to name a few. One technique that has become increasingly investiga
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23

Boopalachandran, Praveenkumar. "Catalytic studies of supported Pd-Au catalysts." Texas A&M University, 2006. http://hdl.handle.net/1969.1/3826.

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Анотація:
Although Pd-Au high-surface area catalysts are used in industry to improve activity and selectivity, a thorough understanding of the nature of these enhancements is lacking. A molecular-level understanding of catalytic reactions under actual reaction conditions is the ultimate goal. This thesis is mainly focused on the application of Pd-Au supported catalysts for vinyl acetate synthesis and CO oxidation reactions using highsurface area catalysts. We have attempted to improve the conventional Pd-Au based catalyst by synthesizing novel acetate-based and polymer-based catalysts. The corresponding
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24

Iniesta, Beteta Ester. "Supramolecular Catalytic Systems: Synthesis, Characterization and Application in Catalysis." Doctoral thesis, Universitat Rovira i Virgili, 2021. http://hdl.handle.net/10803/671551.

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Анотація:
Aquesta tesi doctoral abasta el disseny i el desenvolupament de catalitzadors supramoleculars derivats de metalls de transició per a la seva aplicació com a catalitzadors en transformacions d'interès. La primera part d'aquesta tesi doctoral està centrada en el desenvolupament de catalitzadors de coure(I) regulats supramolecularment i la seva aplicació en reaccions d'inserció d'espècies carbèniques metàl·liques a enllaços O–H, generant derivats α-alquil/aril-α-alcoxi/ariloxi. S’abordà el disseny, preparació, caracterització i aplicació dels catalitzadors de coure(I) derivats de lligands bisoxa
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25

Fan, Yinan. "Rational synthesis of plasmonic/catalytic bimetallic nanocrystals for catalysis." Thesis, Sorbonne université, 2022. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2022SORUS189.pdf.

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Анотація:
Parmi les différents nanocatalyseurs, ceux constitués de nanoparticules de métaux nobles méritent une attention particulière en raison de leurs propriétés électroniques, chimiques et même optiques (dans le cas de transformations renforcées par les plasmons). Le platine ou le palladium sont bien connus pour leurs remarquables propriétés catalytiques, mais ils sont chers et leurs ressources sont limitées. En outre, les nanocatalyseurs monométallique ne peuvent conduire qu'à une gamme limitée de réactions chimiques. Ainsi, notre stratégie a été de développer des nanocatalyseurs bimétalliques comp
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26

Reddy, P. K. "Exploration of catalysts and catalysis under near working conditions." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2018. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/4577.

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27

Warren, James Patrick. "Catalytic chemistry of the rhodium/ceria system : model catalysts and dispersed catalysts." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627214.

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28

Sonqishe, Thantaswa Millecent. "Treatment of brines using commercial zeolites and zeolites synthesized from fly ash derivative." Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_6127_1297842299.

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Анотація:
<p>The objectives of this project was to ameroliate two waste materials, namely Acid Mine Drainage and Fly Ash and recover the solid residues for conversion into an adsorbent to treat brine. The solid residues were then converted into zeolite P through low temperature hydrothermal treatment. The adsorption capacity of the solid residues, zeolite P derived from the solid residues was compared to the commercial zeolite Y and fresh Arnot fly ash. The quality of the resulting water was assessed using different analytical methods before the reaction with adsorbents and after the reaction and a comp
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29

Venable, Margaret Hamm. "Syntheses, structures and support interactions of potential metal oxide catalyst precursors." Thesis, Georgia Institute of Technology, 1990. http://hdl.handle.net/1853/26940.

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30

Ashraf, Muhammed Arfan. "Biomimetic ligands for transition metals." Thesis, King's College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391261.

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31

Linganiso, Linda Zikhona. "Adsorption studies on supported gold catalysts using temperature programmed desorption (TPD)." Thesis, Wits University, 2007. http://hdl.handle.net/10539/20167.

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32

Wojcik, Karolina. "D-glucosamine as "green" substrate in synthesis of ligands for asymetric catalysis." Phd thesis, Université Claude Bernard - Lyon I, 2012. http://tel.archives-ouvertes.fr/tel-00974873.

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Анотація:
Several ligands derived from D-glucosamine, designed for different catalytic reactions havebeen synthesized. The ligands for homogeneous catalysis based on 1,2-glucodiamine wereprepared, and used in reactions of allylic alkylation, hydrogenation and Michael addition.Supported Aqueous Phase Catalyst (SAPC) system was prepared from D-glucosamine anduse with very good results in Suzuki Miyaura cross coupling reactions. Catalyst was alsorecycled. Attempt to prepare ligands grafted on SBA-silica matrix were made as well asligands containing poly(ethylene) glycol moiety.
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33

Chenneberg, Ludwig. "Nouvelles avancées en catalyse photoredox : applications en chimie radicalaire de synthèse et en catalyse duale." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066305/document.

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Анотація:
L’objectif principal des travaux de recherche décrits dans ce manuscrit de thèse, est de concevoir de nouvelles méthodes de synthèse en chimie radicalaire et organométallique, de les associer dans une catalyse duale afin qu’elles puissent être appliquées à l’élaboration de briques moléculaires élaborées. Nous avons développé dans une première étude une alternative photocatalytique à la réaction de désoxygénation classique de Barton-McCombie d’alcools secondaires et tertiaires par l’hydrure de tributylétain. Celle-ci repose sur l’utilisation d’un précurseur O-thiocarbamate dérivé d’alcools pouv
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34

Ebadi, pour Negisa. "Développement de systèmes catalytiques à base de Ca pour la polymérisation sélective de glycérol." Electronic Thesis or Diss., Centrale Lille Institut, 2021. http://www.theses.fr/2021CLIL0027.

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Анотація:
Bien que de très nombreuses applications soient recensées pour valoriser le glycérol coproduit par la filière biodiesel (à raison de 100 kg de glycérol par tonne de biocarburant), les solutions potentiellement les plus lucratives basées sur des transformations chimiques avancées n’atteignent aujourd’hui que rarement le stade commercial. Ceci est principalement dû à (i) une instabilité réglementaire sur les licences de production de biodiesel menaçant ainsi la disponibilité du glycérol et (ii) un prix du glycérol pouvant par conséquent fluctuer de manière imprévisible. Faire évoluer le concept
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35

Shiels, Rebecca Anne. "Synthesis, characterization, and evaluation of silica and polymer supported catalysts for the production of fine chemicals." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/29629.

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Анотація:
Thesis (Ph. D.)--Chemical Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Dr. Christopher Jones; Committee Member: Dr. Dennis Hess; Committee Member: Dr. Hang Lu; Committee Member: Dr. Marcus Weck; Committee Member: Dr. Pradeep Agrawal. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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36

Han, Xu. "Development of innovative methodologies in phosphine organocatalysis and enantioselective gold(I)-catalysis." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS568.

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Анотація:
Les phosphines jouent un rôle central dans la chimie organique moderne. Dans le domaine de la catalyse, les composés organophosphorés peuvent être appliqués soit en tant qu’organocatalyseurs dans de nombreuses transformations, soit en tant que ligands en catalyse organométallique. Au cours de cette thèse, nous avons utilisé les phosphines dans ces deux applications : en organocatalyse et en catalyse asymétrique à l’or(I). Dans la première partie, nous avons développé une réaction d’addition de Michael/réaction de Wittig intramoléculaire. Nous avons judicieusement choisi la phosphine utilisée a
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37

Lopes, Silva Susana. "Développement de nouveaux catalyseurs d'hydrotraitement basés sur l'encapsulation d'hétéropolyoxometallates dans des silices mésostructurées : application à la production de carburants propres." Thesis, Lyon, École normale supérieure, 2013. http://www.theses.fr/2013ENSL0799/document.

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Анотація:
Le développement de technologies plus propres et économes en énergie amène aujourd’hui l’industrie du raffinage à modifier ses stratégies de préparation de catalyseurs et à se tourner vers l'utilisation plus massive de catalyseurs hétérogènes plus actifs, sélectifs, stables et régénérables.Récemment une méthode originale a été développée par Dufaud et al. (J. Mater. Chem., 2009, 19, 1142-1150) pour encapsuler des polyoxométallates (POMs) dans les murs des silices mésoporeuses. Le projet de thèse a visé l’élaboration de nouveaux catalyseurs basés sur cette nouvelle méthodologie qui devrait cond
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38

Ye, Wei. "Catalytic oxidation of methane over supported palladium catalysts." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0003/MQ40128.pdf.

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39

Persson, Katarina. "Bimetallic palladium catalysts for catalytic combustion of methane." Licentiate thesis, Stockholm, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-332.

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40

Huang, Zhenyu. "Magnetic resonance studies of catalysts and catalytic reactors." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612201.

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41

Lenden, Philip. "Tandem catalytic processes involving Rhodium-catalysed intermolecular hydroacylation." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:e63f5fd7-f92f-47dd-b06f-face73729804.

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Анотація:
This work describes the extension of rhodium-catalysed intermolecular hydroacylation to encompass some tandem catalytic processes, wherein a further catalytic process is enacted on the product of an intermolecular hydroacylation reaction in “one pot”. Chapter 1 entails an overview of the development of hydroacylation chemistry, with a focus on the different types of catalytic systems which have been used to facilitate this transformation. A brief description of some precedented examples of tandem catalytic processes which include a hydroacylation reaction is also included. Chapter 2 describes
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42

Beach, Nicholas James. "Metathesis Catalysts in Tandem Catalysis: Methods and Mechanisms for Transformation." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/22731.

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Анотація:
The ever-worsening environmental crisis has stimulated development of less wasteful “green” technologies. To this end, tandem catalysis enables multiple catalytic cycles to be performed within a single reaction vessel, thereby eliminating intermediate processing steps and reducing solvent waste. Assisted tandem catalysis employs suitable chemical triggers to transform the initial catalyst into new species, thereby providing a mechanism for “switching on” secondary catalytic activity. This thesis demonstrates the importance of highly productive secondary catalysts through a comparative hydrogen
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43

Smallwood, Keith. "Catalysis and photocatalysis by platinized titanium dioxide and other catalysts." Thesis, University of Nottingham, 1993. http://eprints.nottingham.ac.uk/12591/.

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Анотація:
The gas-phase, thermal hydrogenations of propene and cyclopropane over various titania-supported metal catalysts have been investigated. Catalysts were prepared either by a photodeposition or a thermal reduction method. Absolute initial hydrogenation rates were calculated from total gas pressure vs time measurements. The activities of all catalysts were found to be very dependent upon catalyst state, as modified by reductive or oxidative pretreatments. These results are discussed in terms of reversible strong metal-support interactions, initiated via hydrogen spillover. For 0.5 %mass Pt on Ti0
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44

Carter, Christabel Anne. "Asymmetric phase transfer catalysis : towards catalysts with a chiral anion." Thesis, University of Leeds, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399654.

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45

Monti, Chiara. "Development of new catalysts for asymmetric catalysis via combinatorial chemistry." Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398589.

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46

Neate, Peter Gregory Nigel. "Pathways to sustainable catalysis : from novel catalysts to mechanistic understanding." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/25441.

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Анотація:
Catalysis allows for the controlled formation of new bonds, whilst reducing both time and energy expenditure in the process. Catalysis has traditionally been the realm of precious metals, which have been used to carry out a bewildering array of reactions. However, there is an ever-increasing drive for the development of catalytic methodology employing sustainable and environmentally benign catalysts. Two such candidates are organocatalysis, omitting the need for metals where possible, or the use of iron catalysis. Two key areas to the advancement of the of field catalysis are the identificatio
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47

Konrad, Tina Maria. "Chiral phanephos derived catalysts and their application in asymmetric catalysis." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/4499.

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Анотація:
The research presented in this thesis is a project funded by the EU-network of the Marie Curie project NANO-HOST in collaboration with partner institutes. The aims of this network are to develop innovative methods for the preparation, recovery and reuse of single-site, nanostructured catalytic materials, and further on apply them in combination with specifically engineered reactors for a sustainable production process for making high value fine chemicals. One part of this project was to prepare chiral diphosphine ligands and their complexes for currently challenging reactions, such as asymmetr
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48

Paterson, A. James. "Exploitation of synergy in oxidation catalysis with bimetallic aluminophosphate catalysts." Thesis, University of Southampton, 2011. https://eprints.soton.ac.uk/192867/.

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A series of novel bimetallic aluminophosphate catalysts were prepared with the simultaneous isomorphous substitution of cobalt (III) and manganese (III) for aluminium (III) and titanium (IV) replacing phosphorus (V). By substituting simultaneously for both Al (III) and P (V) in the ordered microporous aluminophosphate AlPO-5, the potential for catalytic application as either a solidacid or redox catalyst is produced. The bimetallic hydrothermal synthesis produced a phase pure and highly crystalline microporous catalyst which displayed properties not seen in monometallic AlPO-5 materials. These
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49

Peneau, Virginie. "Activation of hydrocarbons and their catalytic oxidation by heterogeneous catalysis." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/74614/.

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Анотація:
The targets of this thesis were the selective oxidation of hydrocarbons under mild conditions, using cheap and environmentally friendly oxidants and initiators. Three projects are treated; the oxidation of an alkane using O2 and a co-oxidant, the oxidation of toluene using TBHP (tert-butyl hydroperoxide) and finally the oxidation of propane using hydrogen peroxide. C-H bond activation, O2 activation and high conversion with high selectivity were essential points to investigate. In the first project, alkane oxidation was studied in presence of a co-oxidant. The co-oxidant has for purpose to ini
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50

Kieffer, Raphaëlle. "Développement de nouveaux catalyseurs pour la dépolymérisation de la lignine par voie d’oxydation." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10124/document.

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Анотація:
La lignine est l'un des biopolymères les plus importants sur Terre. Elle est extraite des plantes et représente la plus grande source de noyaux aromatiques dans la biomasse. De nombreux projets ayant pour but la dépolymérisation de la lignine en molécules de faibles poids moléculaires, valorisables par les industries chimiques, sont de plus en plus développés au vu du fort potentiel de cette bio-ressource. Le but de notre projet était de développer un nouveau système catalytique pour la dépolymérisation de la lignine. Nous nous sommes intéressés à la conception de nouveaux catalyseurs homogène
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