Dissertations / Theses on the topic 'Heterogeneous reactions'
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Sheng, Tian. "Heterogeneous catalytic reactions in electrochemistry." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.675473.
Full textLiu, Z. "Insight into chemical reactions : from heterogeneous to enzymatic reactions." Thesis, Queen's University Belfast, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398116.
Full textPenzien, Jochen. "New heterogeneous catalysts for hydroamination reactions." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964639076.
Full textLopez, de Alonzo Dora E. "Heterogeneous catalysis and biodiesel forming reactions." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1202409238/.
Full textVernon, Patrick D. F. "Heterogeneous catalytic oxidation reactions of methane." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308602.
Full textGiddings, S. L. "Heterogeneous reactions in solar energy conversion." Thesis, Swansea University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.637056.
Full textJiménez, Silva Oriol. "Novel heterogeneous catalysts for intermolecular hydroamination reactions." [S.l.] : [s.n.], 2006. http://mediatum2.ub.tum.de/doc/601479/document.pdf.
Full textCao, X. M. "Insight into hydrogenation reactions in heterogeneous catalysis." Thesis, Queen's University Belfast, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546020.
Full textHarnett, John Patrick. "Heterogeneous reactions on well characterised ice surfaces." Thesis, University of Liverpool, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250388.
Full textYou, Junheng. "Insight into hydrodeoxygenation reactions in heterogeneous catalysis." Thesis, Queen's University Belfast, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.676497.
Full textShanbhag, G. V. "Studies on hydroamination reactions using heterogeneous catalysts." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2008. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2626.
Full textMcAteer, Elizabeth Ann. "Formation and oxidation reactions of phosphonate esters." Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396073.
Full textÖberg, Henrik. "Surface reactions and chemical bonding in heterogeneous catalysis." Doctoral thesis, Stockholms universitet, Fysikum, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-102323.
Full textAt the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 8: Manuscript.
Moon, Daniel Robert. "Heterogeneous reactions involving HO2 radicals and atmospheric aerosols." Thesis, University of Leeds, 2018. http://etheses.whiterose.ac.uk/20699/.
Full textAlarbi, Zohra. "Coordination polymers as heterogeneous catalysts for oxidation reactions." Thesis, University of the Western Cape, 2014. http://hdl.handle.net/11394/4064.
Full textThis study describes the synthesis and characterisation of coordination polymers complexes of Cu(II) and VO(IV) with two polymeric ligands N,Nʹ -1,2-phenylene bis(5-methylenesalicylidenamine)(L1) and N,Nʹ -1,4-butylene bis(5 methylenesalicylidenamine) (L2). Ligands L1 and L2 formed by condensation of 5,5ʹ-methylene bis-(salicylaldehyde) with 1,2-phenylenediamine and 1,4-diaminobutane respectively. The ligands and the complexes were characterized by UV/Vis spectroscopy, proton and carbon nuclear magnetic resonance spectroscopy (1H and 13C-NMR), Fourier transform infrared spectroscopy (FTIR), high resolution scanning electron microscopy (SEM) and thermogravimetric Analysis (TGA)
Inceesungvorn, B. "Silver based heterogeneous catalysts for selective gas phase reactions." Thesis, Queen's University Belfast, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517231.
Full textMichaelides, Angelos. "Towards an understanding of simple reactions in heterogeneous catalysis." Thesis, Queen's University Belfast, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326294.
Full textLandon, Philip. "Novel heterogeneous catalysts for oxidations and Friedel-Crafts reactions." Thesis, University of York, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358154.
Full textSawant, D. P. "Studies in heterogeneous catalysis: supported heteropolyacids catalyzed organic reactions." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2006. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2501.
Full textNagendiran, Anuja. "Catalytic reactions with palladium supported on mesocellular foam : Applications in hydrogenation, isomerization, and C-C bond forming reactions." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-122061.
Full textAt the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 4: Submitted. Paper 5: Submitted.
Baines, Nicholas John. "Synthesis of heterogeneous palladium catalyst assemblies by molecular imprinting." Thesis, University of East Anglia, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249774.
Full textFodor, Anna. "Heterogeneous metal-catalysed C-C coupling reactions : research and development." Thesis, Poitiers, 2016. http://www.theses.fr/2016POIT2256/document.
Full textNew bimetallic palladium/copper catalysts were developed by successive impregnation (TSI) and co-impregnation (CI) on 4Å molecular sieve (4A) and MgAlO mixed oxides supports. The fresh catalysts were characterised and tested in the Suzuki–Miyaura reaction to test their activity, selectivity and stability. It was observed that while the Cu-Pd-4A-TSI catalyst kept its activity during six cycles that of the Cu-Pd-4A-CI dropped. On MgAlO support the catalyst prepared with CI proved to be stable even for six runs contrary to TSI. The active phase of the reaction – namely the Cu–Pd alloy with atomic ratio 1:1 - was determined with the help of catalyst characterisation of the recovered catalysts. This observation confirms that whatever the way of preparation or the support is, the key-point is the presence of Pd-Cu 1:1 particles to enhance the catalytic performances. A crucial difference between the MgAlO and 4A supported catalyst was found in the reaction time necessary for the Suzuki–Miyaura reaction. With the Cu-Pd-MgAl-CI catalyst the reaction time could be reduced to thirty minutes contrary to one hour with Cu-Pd-4A-TSI. Moreover it was concluded that with a more basic support the reduction of the quantity of the base was possible however it brought slightly decreasing yield. The Petasis-borono Mannich reaction was also performed in the presence of each mono-and bimetallic catalysts
Al-Hmoud, Linda. "Understanding heterogeneous copper catalysts for coupling reactions in organic synthesis." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/52997.
Full textZhang, C. "Insights into simple reactions in heterogeneous catalysis : first principles studies." Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395205.
Full textZhao, Xianfeng 1971. "Micro-heterogeneous thorium based fuel concepts for pressurized water reactions." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8680.
Full textIncludes bibliographical references (p. 139-143).
The purpose of this work is to evaluate the potential for enhancing the performance of the once-through PWR fuel cycle by appropriate design of thorium containing fuel with concurrent consideration of neutronics, thermal-hydraulics, and proliferation resistance. CASMO-4 is employed to model a fuel assembly consisting of a homogeneously fueled ThO2-UO2 lattice of conventional design. It is found that homogeneously mixed ThO2-UO2 fuel in general has better physics behavior than all-UO2 fuel, e.g. more negative MTC and less reactivity swing. The H/HM ratio can be optimized to extend the burnup of both ThO2-UO2 and all-UO2 fuel about 10% and 5% respectively. However, it is found that the all-UO2 fuel provides higher potential energy generation (or achievable burnup) than the homogeneously mixed ThO2-UO2 fuel. MOCUP (MCNP+ORIGEN) is used to model unit cells of the micro-heterogeneous fuel. The key findings for the best micro-heterogeneous configurations are as follows: (1) For a given U-235 inventory, a 20% to 30% increase in fuel cycle achievable bumup above the homogeneous case is possible, therefore 10% to 15% above the all-UO2 fuel; (2) For certain axially heterogeneous configurations, a "burnable poison" reactivity suppression effect appears at the beginning of irradiation. Analysis of the possible mechanisms behind these effects shows that they are due to a combination of changes in self-shielding, local fissile worth, and conversion ratio.
(cont.) Economic evaluations show that the homogeneous ThO2-UO2 fuel is 20%-30% more expensive than the equivalent all-U fuel but micro-heterogeneous fuel can be comparable to or even cheaper than the all-UO2 fuel. In terms of the plutonium content, the micro-heterogeneous Th/U fuel is more proliferation-resistant than the homogeneous Th/U fuel, and the homogeneous Th/U fuel is more proliferation-resistant than the all-UO2 fuel. However, the uranium produced in the ThO2 zone of any undenatured micro-heterogeneous design should be considered of proliferative concern. Adding natural or depleted uranium to the ThO2 zone can make the material not weapon-usable at the expense of degrading the neutronic performance. Placing some enriched uranium within the thorium zone may be needed to reduce local thermal peaking to a manageable level.
by Xiaofeng Zhao.
Ph.D.
Willingh, Gavin Von. "Zeolite encapsulated metal complexes as heterogeneous catalysts for oxidation reactions." Thesis, University of the Western Cape, 2012. http://hdl.handle.net/11394/4447.
Full textThis study describes the synthesis and characterisation of Cu(II) and V(IV) complexes of tri- and quadridentate ligands L1 and L2 formed by condensation of ethylenediamine with acetylacetonate in 1:1 and 1:2 molar ratio, respectively. Encapsulation of these metal complexes in the nanocage of zoilite-Y generates new heterogeneous catalysts. These catalysts were synthesized employing the flexible ligand method encapsulation technique.The structures of these encapsulated complexes were established on the basis of various physico-chemical and spectroscopic studies. The results indicated that the complexes did not hinder or modify the framework or structure of the zeolite, confirming successful immobilization of Schiff-bases through the voids of zeolite Y.These encapsulated complexes were screened as heterogeneous catalysts for various oxidation reactions such as such as phenol, benzene, styrene and cyclohexene using a green oxidant (H2O2). For comparison, the corresponding neat complexes were screened as potential homogeneous catalysts for these oxidation reactions. The results proved that the corresponding homogeneous systems described here represent an efficient and inexpensive method for oxidation of phenol, benzene, styrene and cyclohexene, having advantages over heterogeneous catalysis are its high activity and selectivity and short reaction times. Its major problem is its industrial application regarding principally the separation of the catalyst from the products.The size of the substrate has a significant effect on the conversion by encapsulated complexes such as in styrene oxidation. Therefore, it was established that steric effects of the substrates play a critical role in the poor reactive nature of the encapsulated complexes.In general, the percentage conversion decreased upon encapsulation of complexes in zeolite Y. All catalysts studied proved to be potential catalysts for the various oxidation reactions.It has been shown in this study that encapsulation can effectively improve product selectivity but requires a longer reaction time in most cases for maximum activity. Furthermore, oxovanadium complexes were more reactive than copper-based catalysts in all oxidation reactions tested in this study.A reaction mechanism study revealed that the activity of the encapsulated and neat complexes occurs through either formation of peroxovanadium (V) or hydroperoxidecopper(II) intermediate species.The studies in this thesis, therefore, conclude that the Cu(II) and V(IV) complexes encapsulated in Y-zeolite are active heterogeneous catalysts for the selective oxidation of various substrates. Encapsulation of the metal complexes in the super cages (-cages) of the zeolite matrix has the advantages of solid heterogeneous catalysts of easy separation and handling, ruggedness, thermostability, reusability (regeneration of the deactivated catalysts) as well as share many advantageous features of homogeneous catalysts.
Lee, Heung Chan. "Magnetic field effects on electron transfer reactions: heterogeneous photoelectrochemical hydrogen evolution and homogeneous self exchange reaction." Diss., University of Iowa, 2010. https://ir.uiowa.edu/etd/2562.
Full textPosada, Pérez Sergio. "Heterogeneous catalysis of green chemistry reactions on molybdenum carbide based catalysts." Doctoral thesis, Universitat de Barcelona, 2018. http://hdl.handle.net/10803/552405.
Full textEn aquesta tesi es mostra un treball computacional sobre l'ús de catalitzadors econòmics per a la conversió de CO2, un perillós gas d'efecte hivernacle i també per a la producció d'hidrogen, el combustible del futur. En la recerca actual de nous catalitzadors, els carburs de metalls de transició (TMC) han sorgit com una alternativa atractiva pel el seu baix cost i per exhibir excel·lents propietats físiques i químiques. En aquest treball utilitzarem com a catalitzadors les superfícies cúbica δ-MoC (001) i ortoròmbica β-Mo2C (001). L'adsorció de la molècula de CO2 mostra que ambdues superfícies són capaces d'activar i doblegar la molècula. La superfície β-Mo2C (001) és capaç de dissociar fàcilment la molècula de CO2, mentre que la superfície δ-MoC (001) activa CO2 però no la dissocia. Els experiments realitzats pel grup del Dr. Jose Rodriguez van revelar que el CO i el metà són els principals productes de la hidrogenació de CO2 utilitzant β-Mo2C (001) com a catalitzador, i la quantitat de metanol és menor. D'altra banda, només es produeixen CO i metanol utilitzant δ-MoC (001). La deposició de partícules de coure a les superfícies del carbur augmenta dràsticament l'activitat dels catalitzadors, cosa que es va demostrar mitjançant càlculs teòrics. A la superfície β-Mo2C, la quantitat de CO i metanol augmenten mentre que la quantitat de metà disminueix. D'altra banda, la deposició de coure a δ-MoC (001) augmenta molt la quantitat de CO i metanol. En resum, el nostre estudi proposa el Cu/δ-MoC com a prometedor catalitzador de la hidrogenació de CO2 a causa de la seva activitat (la quantitat de productes és superior a la resta de TMCS, metalls i el model de catalitzadors comercials), selectivitat (només el CO i el metanol es produeixen) i l'estabilitat (aquests catalitzadors no es desactiven per la deposició d'oxigen). Tenint en compte els resultats previs, es va proposar la deposició d'or en la superfície δ-MoC per a la producció d'hidrogen. Els càlculs teòrics demostren que la superfície δ-MoC (001) no és un bon catalitzador per WGS, però la deposició dels clústers d'or canvia el mecanisme de reacció i augmenta la quantitat d'H2 produïda.
Gardner, June Ann. "Friedel-Crafts acylation reactions using heterogeneous catalysts stimulated by microwave radiation." Thesis, University of Central Lancashire, 2004. http://clok.uclan.ac.uk/20208/.
Full textStewart, David John. "A study of heterogeneous reactions of atmospheric species on aerosol particles." Thesis, University of Cambridge, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.569504.
Full textKhong, Teck Meng. "Heterogeneous gas phase reactions for the production of chemically bonded phases." Thesis, Birkbeck (University of London), 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246077.
Full textKoch, Rosemary Elizabeth. "Heterogeneous reactions on sulfuric acid films with implications for ozone depletion." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38397.
Full textConte, Marco. "Heterogeneous gold and vanadium based catalysts for hydrochlorination and oxidation reactions." Thesis, Cardiff University, 2006. http://orca.cf.ac.uk/56150/.
Full textWeerathunga, Kaluarachchige Don H. "Metal nanoparticle and semiconductor heterogeneous catalysis for synthetic organic oxidation reactions." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/228677/1/Kaluarachchige%20Don_Weerathunga_Thesis.pdf.
Full textRoy, Babli. "Studies on Solid-Phase Organic Reactions & Catalysis: Greener Approaches." Thesis, University of North Bengal, 2016. http://ir.nbu.ac.in/handle/123456789/2761.
Full textDollenmeier, Hans Peter. "Structure sensitivity and support effects of oxidic heterogeneous catalysts in oxidation reactions /." [S.l.] : [s.n.], 1987. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=8241.
Full textAlsawalha, Murad. "Characterization of acidic and basic properties of heterogeneous catalysts by test reactions." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974005150.
Full textCao, Xinrui. "First-Principles Modeling of Selected Heterogeneous Reactions Catalyzed by Noble-Metal Nanoparticles." Doctoral thesis, KTH, Teoretisk kemi och biologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-159883.
Full textQC 20150211
Mautschke, Hans-Hilmar. "Zirconium Metal Organic Frameworks as Heterogeneous Catalysts for Meerwein-Ponndorf-Verley Reactions." Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/130203.
Full text[CAT] S'han preparat varis materials metall orgànics de zirconi MOF-808 per avaluar les seves propietats catalítiques en reaccions tipus Meerwein-Ponndorf-Verley (MPV) per a la reducció de composts carbonílics. En particular, s'han sintetitzat composts tipus MOF-808 modificats en els que una petita fracció dels lligands trimesat presents en el MOF original s'han reemplaçat per lligands dicarboxilats, com una estratègia per induir la creació controlada de defectes estructurals. Els lligands utilitzats han sigut: isoftalat (MOF-808-IPA), 3,5-piridindicarboxilat (MOF-808-Pydc), 5-aminoisoftlatat (MOF-808- NH2) i 5-hidroxiisoftalat (MOF-808-OH). Tots els materials preparats presenten una elevada cristal·linitat i són isoreticular respecte al MOF-808 original. S'ha avaluat l'activitat catalític del MOF-808 original i dels materials modificats en reaccions tipus MPV, utilitzant ciclohexanona com a compost model. Tots els materials presenten una elevada activitat catalítica, superior a la del tereftalat de zirconi UiO-66 utilitzat com a referència. Aquesta major activitat catalítica es correspon a un major nombre d'ions Zr4+ amb insaturació coordinativa presents en el MOF-808 respecte a l'UiO-66. A més, els materials MOF-808-IPA i MOF-808-Pydc presenten una major activitat que el MOF-808 original, el que és debut a la presència de centres actius menys congestionats estèricament debut a la introducció dels lligands dicarboxilat. Un avantatge addicional dels MOF-808 respecte a l'UiO-66 és el seu sistema de porus més gran, que permet la conversió de molècules de major tamany. Per avaluar aquesta característica, s'ha utilitzat un compost de gran taman, l'estrona, capaç de penetrar en els porus del MOF-808 però no en els de l'UiO-66. En conseqüència, el MOF-808 és capaç de convertir completament l'estrona de forma sel·lectiva a l'estradiol, mentre que l'UiO-66 gairebé no presenta activitat catalítica. A més, quan s'usa el MOF- 808 com a catalitzador, es produeix una quantitat considerable de l'isòmer 17alfa-estradiol, difícil d'obtenir per altre medis, de manera que les propietats de diastereoselectivitat del MOF-808 en reaccions MPV resulten de gran interès preparatiu. Per tal d'estudiar en major detall la diastereoselectivitat de reaccions MPV catalitzades per MOF-808, s'ha estudiat la reducció de ciclohexanones substituïdes: 3-metilciclohexanona (3MeCH), 2- metilciclohexanona (2MeCH) i 2-fenil-ciclohexanona (2PhCH). En funció de l'alcohol usat com a reductor i de la posició del grup substituent en la ciclohexanona, el MOF-808 afavoreix selectivament la formació d'un o de l'altre isòmer, amb una diastereoselectivitat variable: 82%, 61% y 94%, respectivament per a 3MeCH, 2MeCH y 2PhCH. És possible racionalitzar aquest resultats considerant la formació preferent d'un o l'altre estat de transició en l'espai confinat disponible dins dels porus del MOF. Les característiques energètiques del procés s'han analitzat mitjançant l'ús combinat d'estudis cinètics i càlculs teòrics. Finalment, en vista de les interessants propietats del MOF-808 com a catalitzador per a reaccions MPV, s'ha estès amb èxit l'ús d'aquest material a la preparació de composts hidroxiesteroids de difícil obtenció i d'interès farmacològic mitjançant la reducció quimio-, regio- i diastereoselectiva del corresponent oxoesteroid. D'aquesta manera, s'ha aconseguit obtenir en un únic pas de reacció i amb una elevada selectivitat els següents composts: 17alfa-estradiol, 5alfa-androstan-3beta,17alfa-diol i epitestosterona, el que demostra el potencial del MOF-808 com a catalitzador per a la síntesi de composts d'alt valor afegit.
[EN] Various zirconium-containing MOF-808 compounds have been prepared as potential catalysts for the Meerwein-Ponndorf-Verley (MPV) reduction of carbonyl compounds. Modified MOF-808 have been synthethized in which a small fraction of the trimesate ligands present in pristine MOF-808 has been replaced by dicarboxylate ligands, as a strategy to induce a controlled creation of defects. The linkers used are: isophthalate (MOF-808-IPA), 3,5-pyridinedicarboxylate (MOF-808-Pydc), 5-aminoisophthalate (MOF-808-NH2) and 5-hydroxyisophthalate (MOF-808-OH). All these compounds are highly crystalline and isoreticular with pristine MOF-808. The catalytic activity of pristine and defect engineered MOF-808 has been evaluated for MPV reactions, using cyclohexanone as model substrate. All the materials show a higher catalytic activity than that of zirconium terephthalate UiO-66 used as reference. This higher activity is attributed to the higher amount of coordinatively unsaturated Zr4+ ions in MOF-808 than in UiO-66. Moreover, MOF- 808-IPA and MOF-808-Pydc are more active than pristine MOF-808, which is due to the creation of less sterically crowded sites due to the introduction of defective dicarboyxlate linkers. A further advantage of MOF-808 over UiO-66 is the presence of a wider pore system, which allows converting bulkier substrates. To evaluate this characteristic, a bulky ketone has been used; estrone, which can enter the pores of MOF-808 but not those of UiO-66. Accordingly, MOF-808 can fully convert estrone selectively to estradiol, while UiO-66 shows barely any catalytic activity. Interestingly, when MOF- 808 is used as catalysts, a noticeable amount of the isomer 17alpha-estradiol is produced, which is difficult to obtain by other means. Therefore, the diastereoselective properties of MOF-808 for MPV reactions are interesting from the preparative point of view. In order to investigate in more detail the diastereoselective properties of MOF-808 for MPV reactions, various substituted cyclohexanones have been considered: 3-methylcyclohexanone (3MeCH), 2- methylcyclohexanone (2MeCH) and 2-phenylcyclohexanone (2PhCH). Depending on the alcohol used as reducing agent and the position of the substituent in the cyclohexanone molecule, MOF-808 selectively favors the formation of one isomer or the other with a different diastereoselectivity: 82%, 61% and 94%, respectively for 3MeCH, 2MeCH y 2PhCH. These results can be rationalized by considering the preferential formation of a given transition state in the confined space available inside the MOF pores. The energetic characteristics of the process have been analyzed by a combined use of kinetic studies and theoretical calculations. Finally, in view of the interesting properties of MOF-808 as catalyst for MPV reactions, this material has been successfully applied to the preparation of a number of challenging hydroxysteroid compounds with pharmacologic interest through a chemo-, regio- and diastereoselective reduction of the corresponding oxosteroid. In this way, it has been possible to prepare in one single reaction step the following compounds: 17alpha-estradiol, 5alpha-androstan-3beta,17alpha-diol and epitestosterone. This demonstrates the high potential of MOF-808 as a catalysts for the synthesis of high added value compounds.
I want to thank the European Union’s Horizon 2020 research and innovation program for a contract under the Marie Sklodowska-Curie grant agreement No. 641887 (Project acronym: DEFNET).
Mautschke, H. (2019). Zirconium Metal Organic Frameworks as Heterogeneous Catalysts for Meerwein-Ponndorf-Verley Reactions [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/130203
TESIS
Gu, Qingyi. "Biomass reactions on heterogeneous catalysts : computational studies on surface determination and reactivity." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEN011.
Full textIn the context of biomass valorization by heterogeneous catalysis, computational chemistry is key to provide guidance to establish the nature of the active sites in combination with experimental characterizations. Then, the reaction mechanism can be studied to determine the rate determining transition state and intermediate and further design in silico better catalysts. We implemented this approach in several reactions involving alcohols that are key in the shift from a petroleum chemical feedstock to a biomass-based feedstock. Firstly, we focused on liquid phase alcohol oxidation by oxygen, a reaction that generally requires an alkaline environment, which is detrimental to the atom economy of the process since it generates the carboxylate salt instead of the carboxylic acid. We proposed a model of metal/basic water interface that includes the adsorption of hydroxide anion. It charges the metallic surface and modifies its catalytic activity. This model was first validated comparing the predicted activity of Au and Pt in presence and in absence of a base, and then used oxidation of alcohol ethoxylates by bimetals. Then, we switched to gas phase dehydration of C3 and C4 alcohols using phosphate-based catalysts. The modeling of the surfaces was based on experimental characterizations. The molecular coverage of water on the surface in function of the pressure and temperature was established using ab initio thermodynamic. The simulations of infrared spectra of CO, NH3 and C2H2 adsorption allowed us to identify the acido-basic sites which play an important role in the reaction mechanism investigation that followed
Wei, Chao. "Modeling the effects of heterogeneous reactions on atmospheric chemistry and aerosol properties." Diss., University of Iowa, 2010. https://ir.uiowa.edu/etd/903.
Full textAçıkel, Müge Artok Levent. "Silica Supported N-Heterocyclic Carbenes:Active and Reusable Heterogeneous Catalysts for Mizoroki-Heck Reactions/." [s.l.]: [s.n.], 2004. http://library.iyte.edu.tr/tezler/master/kimya/T000496.pdf.
Full textDurgun, Gülay Artok Levent. "Short-time suzuki reactions of arly halides catalyzed by palladium-loaded NaY zeolite under aerobic conditions/." [s.l.]: [s.n.], 2006. http://library.iyte.edu.tr/tezler/master/kimya/T000528.pdf.
Full textKeywords:Suzuki reactions, palladium, NaYzeolite, heterogeneous catalyst, C-C coupling. Includes bibliographical references (leaves. 71-81).
Xiao, Song. "Heterogeneous reactions of NO₃ and N₂O₅ with organic substrates of atmospheric relevance." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/31039.
Full textRoddis, Tristan. "A laboratory investigation of the heterogeneous reactions of atmospheric halogen and nitrogen compounds." Thesis, University of East Anglia, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266730.
Full textXu, Chunli. "Preparation and characterisation of MgO : a heterogeneous basic catalyst for liquid phase reactions." Thesis, Cardiff University, 2006. http://orca.cf.ac.uk/55646/.
Full textFaglioni, Francesco Goddard William A. "Quantum chemical computations of heterogeneous selective oxidation, STM images, and multiple bond reactions." Diss., Pasadena, Calif. : California Institute of Technology, 1998. http://resolver.caltech.edu/CaltechTHESIS:10202009-092753223.
Full textDumbre, D. K. "Selective liquid phase alcohol oxidation and heck- type coupling reactions using heterogeneous catalysts." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2008. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2701.
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