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Dissertations / Theses on the topic 'Catalyst ink'

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Published: 8 June 2024
Last updated: 31 July 2025

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1

Jacobs, Clayton Jeffrey. "Influence of catalyst ink mixing procedures on catalyst layer properties and in-situ PEMFC performance." Master's thesis, University of Cape Town, 2016. http://hdl.handle.net/11427/22932.

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Despite the benefits of fuel cell technology its advancement to being commercially functional is hindered by a number of crucial factors. These factors are often associated with the lack of appropriate materials or manufacturing routes that would enable the cost of electricity per kWh to compete with existing technology. Whilst most research efforts have been directed towards developing more active catalysts, the amount of catalyst required in the fuel cell can be further reduced by improving the platinum utilisation in the membrane electrode assembly. The platinum utilisation is a strong func
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2

DELMONDO, LUISA. "Development and characterization of nanostructured catalysts." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2709352.

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The aim of this thesis work is focused on the development and characterization of nanostructured catalysts, in order to exploit them in two different reactions: the Oxygen Reduction Reaction (ORR) and the CO2 Reduction Reaction (CO2RR). The objective of this research is to find economical and ecological materials that could replace platinum as catalyst of the two reactions, while maintaining comparable performance. Considering the ORR, the study is concentrated on the manganese oxide family (MnxOy), structured in the form of nanofibers by electrospinning technique and subsequent thermal treat
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Hepola, Jouko. "Sulfur transformations in catalytic hot-gas cleaning of gasification gas /." Espoo [Finland] : Technical Research Centre of Finland, 2000. http://www.vtt.fi/inf/pdf/publications/2000/P425.pdf.

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4

TOLOD, KRISTINE. "Visible light-driven catalysts for water oxidation: towards solar fuel biorefineries." Doctoral thesis, Politecnico di Torino, 2019. http://hdl.handle.net/11583/2732969.

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5

Baker, Jenny. "Development and characterisation of graphene ink catalysts for use in dye sensitised solar cells." Thesis, Swansea University, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678272.

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6

ANNAMALAI, ABINAYA. "Electrochemical Energy Conversion Catalysts for Water Oxidation and CO2 Reduction." Doctoral thesis, Università degli studi di Genova, 2022. http://hdl.handle.net/11567/1086344.

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Numerous efforts have been made for the development of renewable energies to replace fossil fuels and thus reduce greenhouse gas emissions. Renewable energy has the advantage of having a limitless supply over time and is clean. This thesis reports on novel transition metal-based electrocatalysts for acidic water splitting and CO2 reduction, which are two significant technologies to produce chemical fuels (i.e. H2 and C-based compounds) from renewable electricity. The target is to develop and investigate cost-effective, stable, and efficient electrocatalysts for acidic water splitting and CO2 r
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7

AMJAD, UM-E.-SALMA. "Noble Metal based Catalysts for Natural Gas Steam Reforming Activity, Endurance and Kinetics." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2588279.

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This thesis illustrates catalytic activity, stability and intrinsic kinetics of methane steam reforming (MSR) reaction over noble metal catalysts. The main objective of this thesis is to evaluate a best performing catalyst based on the maximization of H2 production and minimization of CO in the synthesis gas produced from MSR reaction. The noble metal catalysts tested towards MSR reaction were Rh, Ru and Pt supported on different reducible and irreducible oxides. The oxides (CeO2, MgO and Al2O3) used in this work were synthesized from their nitrite precursor by Simultaneous combustion synthes
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PEZZOLATO, LORENZO. "Fe-N-C non-noble catalysts for applications in Fuel Cells and Metal Air Batteries." Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2809320.

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9

Turtayeva, Zarina. "Genesis of AEMFC (anion exchange membrane fuel cell) at the lab scale : from PEMFC’s inks composition toward fuel cell bench tests in alkaline media." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0285.

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Les piles à combustible à membrane échangeuse d'anions (AEMFC) ont récemment attiré l'attention en tant que piles à combustible alternatives à faible coût aux piles à combustible à membrane échangeuse de protons traditionnelles en raison de l'utilisation possible d'électrocatalyseurs non-nobles. Bien que l'AEMFC ressemble à la PEMFC, les problèmes de gestion de l'eau sont plus prégnants dans une AEMFC car l'ORR en milieu alcalin nécessite de l'eau, tandis qu'en même temps, de l'eau est produite en grande quantité du côté de l'anode. Pour mieux comprendre la gestion de l'eau dans ce type de pil
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10

ERCOLINO, GIULIANA. "Catalytic combustion of methane in lean conditions on Pd/Co​3O4 ​: from powdered to open-cell foam supported catalysts." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2675699.

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The aim of this work is an investigation on a series of Pd-doped cobalt spinels catalysts for the lean CH4 combustion reaction. All the catalysts were synthesized and fully characterized from the structural and surface point of view (XRD, XRF, RS, BET, XPS, and FESEM) and then tested towards the oxidation of CH4 in lean conditions. The work was divided into two parts. In the first part, different catalysts at powder level were screened to optimize the design of Pd-doped cobalt spinel catalysts. In the second part, the best performing Pd-based catalysts previously selected were coated on struct
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11

Bonifacio, Rafael Nogueira. "Desenvolvimento de processo de produção de conjuntos eletrodo-membrana-eletrodo para células a combustível baseadas no uso de membrana polimérica condutora de prótons (PEMFC) por impressão a tela." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-29082011-151940/.

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Energia é um recurso que historicamente apresenta tendência de crescimento de demanda. Projeções indicam que, para suprir as necessidades energéticas do futuro, será necessário um uso massivo do hidrogênio como combustível. O uso de sistemas de célula a combustível baseada no uso de membrana polimérica condutora de prótons (PEMFC) tem características que permitem sua aplicação para geração de energia elétrica em aplicações estacionárias, automotivas e portáteis. O uso de hidrogênio como combustível para PEMFC apresenta a vantagem de resultar em baixa emissão de poluentes quando comparado às do
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12

Carreño, Gonzalez Ivon Maritza. "Desoxigenação de Etilenoglicol sobre catalisadores de Ni, Mo e NiMo/A 'I IND. 2' 'O IND. 3'." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266784.

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Orientador: Gustavo Paim Valença<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-20T14:34:27Z (GMT). No. of bitstreams: 1 CarrenoGonzalez_IvonMaritza_M.pdf: 7134932 bytes, checksum: acf616348074122010d96651cd1436a7 (MD5) Previous issue date: 2012<br>Resumo: Sólidos monometálicos e bimetálicos de níquel e molibdênio suportado em alumina foram impregnados com 3% de teor metálico variando a ordem de impregnação até umidade incipiente, os quais podem ter efeitos significativos sobre o seu desempenho. As amostra
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MARIN, FIGUEREDO MIGUEL JOSE. "Metal Oxide Catalysts for the Abatement of Volatile Organic Compounds and Carbonaceous Particulate Matter." Doctoral thesis, Politecnico di Torino, 2022. http://hdl.handle.net/11583/2966339.

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14

CRISTIANO, GIUSEPPE. "STEAM REFORMING AND OXIDATIVE STEAM REFORMING OF METHANE AND BIOGAS OVER STRUCTURED CATALYSTS." Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2540087.

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In 2006 the global demand for primary energy amounted to nearly 12 million tons of oil equivalent (Mtoe), to a large extent (over 80%) supplied by fossil fuels, i.e. coal, oil, and natural gas. According to the scenario suggested by the International Energy Agency (IEA), energy demand will rise in 2030 to about 17 Mtoe. Fossil fuels will remain largely dominant. Over 70% of the expected demand for the period 2008-2030 will be due to the developing countries (China, India, Middle East, Africa, Latin America). Approximately 50% of this energy demand will involve the generation of electricity, bu
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15

Ricca, Antonio. "Innovative catalysts for process intensification of methane reforming and propane dehydrogenation reactions." Doctoral thesis, Universita degli studi di Salerno, 2014. http://hdl.handle.net/10556/1769.

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2012 - 2013<br>In the early decade, a rapid increase in oil consumption was recorded, that led to a widening between the predicted demand for oil and the known oil reserves. Such trend, mainly due to the growing new economies, is causing a quick increasing in oil price, that effect on European chemical industry competitiveness. In this dramatic scenario, characterized by higher cost of naphtha from crude oil, the ability to exploit novel feeds such as natural gas, coal and biomass may be the keystone for the chemical industry revival. Innovating chemical processes are thus essential for the fu
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OLIANI, BENEDETTA. "Sviluppo di tecniche in regime transitorio per lo studio di reazioni di catalisi eterogenea." Doctoral thesis, Università degli studi di Padova, 2022. http://hdl.handle.net/11577/3448079.

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The research activities reported in this PhD thesis focus on one class of time-depending input variables: temperature and reactant concentration. Specifically, reactivity parameters (reagents conversion and products formation) were recorded as a function of temperature in temperature-programmed experiments with variable feed conditions (reducing or oxidizing atmospheres) and spent materials were characterized with surface analyses (SEM, EDS) to correlate their activity to chemical (mass and heat transfer) and physical (aggregation, segregation) phenomena. Also, the common feature between the c
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Pisano, Domenico. "High thermal conductivity catalysts for the CO-WGS process intensification." Doctoral thesis, Universita degli studi di Salerno, 2016. http://hdl.handle.net/10556/2463.

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2014 - 2015<br>Today, the increasingly serious lack of resources and the obsolescence of the plants present on the whole planet led to develop new ways that go beyond “traditional” chemical engineering. The research is now focusing on novel equipment and techniques that potentially could change the concept of chemical plants and lead to compact, safe, energy-efficient, and environment-friendly sustainable processes. These developments share a common focus on “process intensification” — an approach that has truly emerged in the past few years as a special and interesting discipline of chemical
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18

Fuss, Botti Renata. "Development of Structured Porous Heterogeneous Catalyst for Biodiesel Production by Transesterification of Vegetable Oil." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3426343.

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Many environmental problems are caused when fossil fuels are used in engines. Biodiesel is a promising option to substitute these fuels because it is renewable, biodegradable and not toxic. The most used process to prepare biodiesel is by homogeneous transesterification of vegetable oils, using NaOH or KOH, but it produces a high concentration of impurities in the product. To overcome this, the use of heterogeneous catalysts is being increasingly studied. Geopolymer (GP) is an inorganic material with a chemical composition similar to zeolite and a variable microstructure, obtained by the react
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Pirola, C. "Novel Supported iron Fischer Tropsch catalysts : preparation, characterization and applications." Doctoral thesis, Università degli Studi di Milano, 2008. http://hdl.handle.net/2434/57056.

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For political and environmental concerns about fossil fuels, today it is imperative to develop economical and energy-efficient processes for the sustainable production of fuels and chemicals. Fischer Tropsch synthesis is a well-established industrial process able to utilize for these objectives syngas (mixture of H2, CO, CO2) manufactured from CH4, coal or, as a new tendency, from biomass. In particular, for the utilization of syngas from biomass it is necessary to use iron-based catalysts. The PhD work has performed an optimization study of particular iron based supported catalysts loaded wit
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20

ARIF, Omer. "Self-catalyzed and catalyst-free III-V semiconductor nanowire grown by CBE." Doctoral thesis, Scuola Normale Superiore, 2021. http://hdl.handle.net/11384/105824.

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In this thesis, the growth dynamics and mechanisms of III-V semiconductor nanowires (NWs) and their heterostructures are studied. III-V NWs are realized by self-catalyzed and catalyst-free growth methods on Si (111) substrates by means of chemical beam epitaxy. The Au-free growth approach is particularly important for the integration of III-V semiconductors on silicon toward a CMOS-compatible electronics. The morphological and structural properties of the grown NWs are investigated by scanning (SEM) and transmission electron microscopy (TEM). These NWs exhibit very high aspect ratio and good m
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21

THALLURI, SITARAMANJANEYA MOULI. "Design of Visible-light driven catalysts for water oxidation and VOC degradation." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2588775.

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The PhD thesis involves one or more articles that are either published,submitted or in the process of manuscript preparation. These all chapters are eloborated in context to the understandings and advancements involved during the PhD period. The whole thesis involves insights about synthesis and characterization of BiVO4 in the form of powder as well as thin films. It also describes the ability of BiVO4 powders and thin films in water splitting and volatile organic compound degradation.
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22

PAMPARARO, GIOVANNI. "Nanostructured catalysts for the bio-ethanol conversion to acetaldehyde: development and optimization." Doctoral thesis, Università degli studi di Genova, 2022. http://hdl.handle.net/11567/1073525.

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Heterogeneous catalysts, especially when nanostructured, can play a crucial role to minimize byproducts and to stabilize the catalyst itself, thanks to its tailored properties. The efforts of my PhD have been focused to synthetize new nanostructured catalysts for the acetaldehyde production from ethanol via oxidative and non-oxidative dehydrogenation reactions. For oxidative dehydrogenation process Mo-based catalysts, supported on alumina, silica-alumina or silica, have been synthesized and tested. High acetaldehyde yield was obtained in the temperature range 573-673 K even if at higher t
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23

ALIJANI, SHAHRAM. "EFFECT OF THE PREPARATION OF THE CATALYST AND PROTECTIVE AGENT IN LIQUID PHASE HYDROGENATION REACTIONS." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/816935.

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Abstract In this Ph.D. project, the effective parameters in the sol-immobilization method which can affect catalytic reactivity including: capping agent, solvent of synthesis, and support were studied. The synthesized catalysts were employed in the liquid phase hydrogenation reactions of two biomass derived molecules namely furfural and vanillin. In this regard, the role of protective agents, which are used to stabilize colloidal nanoparticles (NPs) in solutions, for Pd NPs supported on carbon support in the liquid phase hydrogenation of furfural was explored. The use of Pd as a hydrogenation
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SAPIO, FRANCESCO. "Diesel After-Treatment Systems Modeling Optimization Techniques." Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2842513.

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OSMIERI, LUIGI. "Non-noble metal catalysts for oxygen reduction reaction in low temperature fuel cells." Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2640183.

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Polymer electrolyte membrane fuel cells (PEMFC) are electrochemical devices which can directly convert the chemical energy of a fuel (such as hydrogen or a low-molecular weight alcohol) and an oxidant (i.e. oxygen) into electrical energy with high efficiency. Moreover, due their low operating temperature, they are suitable for automotive or portable applications. However, the slow kinetics of oxygen reduction reaction (ORR) requires the use of costly Pt-based catalysts at the cathode in order to obtain the desired power density values. Nevertheless, the cathode is still responsible for the mai
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26

Al-zaidi, Bashir Yousif Sherhan. "The effect of modification techniques on the performance of zeolite-Y catalysts in hydrocarbon cracking reactions." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/the-effect-of-modification-techniques-on-the-performance-of-zeolitey-catalysts-in-hydrocarbon-cracking-reactions(6f64393c-ea13-4ec4-85d3-60e650e26be7).html.

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Mankind makes extensive use of crude oil to fuel its insatiable demands for energy and hydrocarbon derivatives. The refining of crude oil is based on a process known as cracking, where long-chain hydrocarbons are systematically broken into smaller chain hydrocarbons known as fractions with each fraction allowing for the production of a specific material. The maximum efficiency of cracking can be achieved in the petroleum refining processes by controlling the operating parameters of the units, and over the years many studies have attempted to optimize the cracking conditions such as temperature
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Comazzi, A. "SYNTHESIS, CHARACTERIZATION AND RIG TESTS OF SUPPORTED FE AND CO-BASED NANOSTRUCTURED CATALYSTS ACTIVE IN THE THERMOCHEMICAL BTL/CTL/GTL-FT PROCESSES." Doctoral thesis, Università degli Studi di Milano, 2017. http://hdl.handle.net/2434/475923.

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During this PhD project different Fe and Co-based catalysts active in the FT reaction have been synthesized, characterized and tested, in particular: 1- An impregnated synthesized Fe-based catalyst supported on SiO2 and promoted with K and Cu (30 %wt of Fe, 2 %wt of K and 3.75 %wt of Cu) named Fe30K2Cu3.75. In particular, potassium improves CO ad-sorption while Cu promotes the reduction of the iron oxides species. The loading of active metal and promoters have been already determined elsewhere in recent studies. 2- Three different Co-based catalysts synthesized by flame spray pyrolysis (FSP)
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MOROSANU, EDUARD ALEXANDRU. "Catalytic processes for CO2 conversion into Synthetic Methane." Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2841162.

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29

GADHI, TANVEER AHMED. "Design of Visible Light Driven Bismuth based Catalysts for Degradation of Organic Pollutants." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2702932.

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This Ph.D. thesis deals with the synthesis, immobilization of bismuth-based nanostructures and their photocatalytic evaluation for degradation of organic pollutants mainly dyes, with the aim to optimize synthesis and photo-evaluation conditions by focusing the practical application of heterogeneous photocatalysis. Initially, various bismuth based single structures α-Bi2O3, Bi5O7NO3 and heterostructures α/β-Bi2O3, β-Bi2O3/Bi5O7NO3 were synthesized by a simple and scalable route i.e. thermal decomposition of precursor salt. Properties such as crystallinity, composition, morphology and optical pa
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Freitas, Fernanda Gabriel de [UNESP]. "Catalisadores nanoestruturados contendo ligas de 'PT' e 'TI''O IND.2' para a oxidação eletroquímica de etanol." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/110850.

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Made available in DSpace on 2014-12-02T11:16:39Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-03-13Bitstream added on 2014-12-02T11:21:04Z : No. of bitstreams: 1 000775466_20151001.pdf: 418328 bytes, checksum: 4f60ea8d332639fc5ed67eb52a4bc7b9 (MD5) Bitstreams deleted on 2015-10-01T13:00:54Z: 000775466_20151001.pdf,. Added 1 bitstream(s) on 2015-10-01T13:01:38Z : No. of bitstreams: 1 000775466.pdf: 2719803 bytes, checksum: a2cdad3474fddaaaaae84a6ac81d0cfd (MD5)<br>Neste trabalho, foi estudada a influência da adição de TiO2 na atividade catalítica para a reação de oxidação de etanol
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Freitas, Fernanda Gabriel de. "Catalisadores nanoestruturados contendo ligas de 'PT' e 'TI''O IND.2' para a oxidação eletroquímica de etanol /." Araraquara, 2014. http://hdl.handle.net/11449/110850.

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Orientador: Hebe de las Mercedes Villullas<br>Co-orientador: Sandra Helena Pulcinelli<br>Banca: Joelma Perez<br>Banca: Antônio Carlos Dias Ângelo<br>Banca: Margarida Juri Saeki<br>Banca: Flávio Colmati Júnior<br>Resumo: Neste trabalho, foi estudada a influência da adição de TiO2 na atividade catalítica para a reação de oxidação de etanol sobre nanocatalisadores PtRu e PtSn. O efeito da quantidade de TiO2 adicionado também foi investigado para os catalisadores bimetálicos de PtSn. Os estudos foram realizados de modo comparativo para catalisadores suportados em carbono com a mesma parte metálica
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ANDANA, TAHRIZI. "Roles of morphology and foreign metals of ceria-based catalysts in improving oxidations of Diesel vehicle pollutants." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2669105.

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The present work highlights well-defined nanostructured ceria; a morphology that bestows exceptional catalytic activity on ceria towards soot oxidation. The work includes also introduction of promoting foreign metals, such as praseodymium and zirconium, to well-defined nanostructured ceria as a means of improving reducibility, thermal stability and oxygen storage capacity of the catalyst. Temperature-programmed oxidation (TPO) has been used for analyzing catalytic activity. At the first stage of the research, nanostructured equimolar ceria-praseodymia (denoted as Ce50Pr50-NP) was found to have
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RIPANDELLI, SIMONE. "1,3-Dihydroxypropan-2-one (DHA) synthesis from Glycerol for pharmaceutical applications." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2605356.

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In the last century the amino alcohol serinol (2-amino-1,3-propanediol) has become a common intermediate for several chemical processes. Since the 40's serinol was used as precursor for synthesis of antibiotics (e.g. chloramphenicol). In the last years, new scopes of application were discovered. Serinol is used as building block in the synthesis of X-ray contrast agents, pharmaceuticals (anti-inflammatory or analgesic drugs) or in the cosmetics industry. It can either be obtained by chemical processes based on 2-nitro-1,3-propanediol, dihydroxiacetone (1,3-Dihydroxypropan-2-one or simply DHA)
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SIRACUSANO, STEFANIA. "Development and characterization of catalysts for electrolytic hydrogen production and chlor–alkali electrolysis cells." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2010. http://hdl.handle.net/2108/1337.

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Gli argomenti di questa tesi hanno riguardato l’elettrolisi cloro-soda e l’elettrolisi dell’acqua mediante sistemi basati su membrane a scambio protonico (PEM). • Elettrolisi cloro-soda. Il cloro è oggi essenzialmente ottenuto mediante i processi industriali di elettrolisi di cloro-soda ed, in minore quantità, dall’elettrolisi dell’acido cloridrico. Il principale problema di questi processi è l’elevato consumo di energia elettrica che, solitamente, rappresenta una parte sostanziale del costo totale di produzione. Per l’ottimizzare di tale processo è necessario, quindi, ridurre il consumo e
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Michelon, Nicola. "Modelling and experimental investigation of microkinetic in heterogeneous catalysis: hydrogen combustion and production." Doctoral thesis, Università degli studi di Padova, 2015. http://hdl.handle.net/11577/3424703.

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This thesis investigates both hydrogen combustion and production, focusing on fundamentals of Pt-catalysed oxidation and steam methane reforming on nickelbased catalysts. On the first aspect, we started reporting and investigating discrepancies on the structure and predictions of detail surface kinetic models from Literature, for H2-O2 reaction on Pt. Quantitative comparisons have been carried out through a closed-vessel, well-stirred reactor model with catalytic internal surface. Discrepancies in the predictions of the microkinetic models apparently comes from disagreement in the experimenta
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DOSA, MELODJ. "Nanostructured ceria-based catalysts for automotive application - Formulation of nanostructured systems for diesel and gasoline-type engines." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2903500.

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MONCADA, QUINTERO CARMEN WILLIANA. "Ceramic open cell foams as catalytic support for endothermic and exothermic reactions: Focus on lean methane combustion." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2929756.

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Niemelä, Marita. "Reactions of synthesis gas on silica supported transition metal catalysts /." Espoo : Technical Research Centre of Finland, 1997. http://www.vtt.fi/inf/pdf/publications/1997/P310.pdf.

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Reinikainen, Matti. "Cobalt and ruthenium-cobalt catalysts in CO hydrogeneration and hydroformylation /." Espoo : Technical Research Centre of Finland, 1998. http://www.vtt.fi/inf/pdf/publications/1998/P363.pdf.

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40

Boffito, D. C. "BIODIESEL PRODUCTION FROM NON-FOODSTUFF: CHEMISTRY, CATALYSIS AND ENGINEERING." Doctoral thesis, Università degli Studi di Milano, 2013. http://hdl.handle.net/2434/214934.

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1. Introduction Biodiesel (BD) is a liquid biofuel that is defined as a fatty acid methyl ester fulfilling standards such as the ones set by European (EN 14214) and the American (ASTM 6751) regulations. BD is obtained by the transesterification (Scheme 1.1) or alcoholysis of natural triglycerides contained in vegetable oils, animal fats, waste fats and greases, waste cooking oils (WCO) or side-stream products of refined edible oil production with short-chain alcohols, usually methanol or ethanol and using an alkaline homogeneous catalyst (Perego and Ricci, 2012). Scheme 1.1. Transest
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OTTONE, MELIS CARMINNA SOPHIA. "Heterogeneous and Heterogenized Catalysts for Water Oxidation Reaction as Studied by Means of Sacrificial Oxidant." Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2594356.

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Hydrogen production from solar-driven water splitting (WS) reaction is considered a promising way to store solar energy. This process can be achieved directly by means of a photo-electrochemical cell (PEC), where light absorption, charge separation and WS occur in a single device; or indirectly, by coupling a photovoltaic device to an electrolyzer. WS is a thermodynamically uphill reaction, formed by two half reactions, i.e. the reduction of protons into H2 and the oxidation of water into O2. From a kinetic point of view, the latter is the most challenging one, being generally considered as th
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42

FRONZO, A. DI. "BIOMASS TO LIQUID PROCESS: NEW KIND OF COBALT AND IRON BASED CATALYSTS FOR THE FISCHER-TROPSCH SYNTHESIS." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/229549.

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Nowadays it is imperative to develop economical and energy-efficient processes for the sustainable production of fuels and chemicals alternative to the ones deriving from petroleum. Climate change and air quality are major environmental concerns because they directly affect the way we live and breathe. In order to meet the present and future threats generated by emissions to the atmosphere, environmental agencies around the world have issued more stringent regulations. One of them is the control of residual sulfur in diesel fuel and emission standards for particulates from diesel vehicles. All
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43

SALOMONE, FABIO. "Addressing the challenges of the Power-to-Fuel technologies from a catalyst development and techno-economic point of view." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2907012.

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44

Cade, Christine Elizabeth. "Isoniazid-Resistance Conferring Mutations in Mycobacterium tuberculosis KatG: Catalase, Peroxidase, and INH-NADH Adduct Formation Activities." NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-10292009-100009/.

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Mycobacterium tuberculosis catalase-peroxidase (KatG) is a bifunctional hemoprotein which activates isoniazid (INH), a pro-drug that is integral to frontline antituberculosis treatments. The activated species, an isonicotinoyl radical, couples to NAD+/NADH forming an isoniazid-NADH adduct that ultimately confers anti-tubercular activity. In order to better understand the mechanisms of isoniazid activation as well as the origins of KatG-derived INH-resistance, we have compared the catalytic properties of the wild-type enzyme to twenty-three KatG mutants which have been associated with isoniazid
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45

Smith, Rachel. "Probing crystal growth in methanol-to-olefins catalysts." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/probing-crystal-growth-in-methanoltoolefins-catalysts(83b999a1-775e-4e55-8e94-47403d2a86c6).html.

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The methanol-to-olefins reaction is an important industrial process for the production of light olefins (C2-C4). Silicoaluminophosphates are the most common catalysts for this process with SAPO-34 (CHA), SAPO-18 (AEI) and their intergrowths being considered the most catalytically active and selective. Understanding the crystal growth of such materials is important for control of the structure and defect incorporation, which can have a large effect on the catalytic behaviour. In this thesis, the synthesis, characterisation, catalysis and crystal growth of such materials are investigated. A seri
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MONTENEGRO, CAMACHO YEIDY SORANI. "Green hydrogen production from biogas autothermal reforming processor coupled with soot trap." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2674736.

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The present Ph.D. thesis deals with the hydrogen production via a novel process involving a biogas autothermal reforming (ATR) unit with the adoption of a catalytic wall-flow filter located downstream from the ATR processor to effectively filter and in-situ gasify the carbon emissions eventually generated. This work was aimed to produce 50 Nm3/h of green hydrogen from the ATR of a model biogas (60:40 Vol ratio) by using catalytic structured supports. Moreover, a solution for the eventual carbon formation during the biogas ATR was addressed. A nanostructured delafossite catalyst to ensure the g
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SCELFO, SIMONE. "Metal oxides catalysts for the synthesis of value-added chemicals from 2nd generation sugars and sugar derivatives." Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2675152.

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The present Ph.D. thesis provides some examples of innovative 2nd generation catalytic processes for the conversion of renewable raw materials into green value-added chemicals. In particular, D-glucose and some its derivatives, all ideally representing waste materials of dedicated biomasses, agricultural residues, or solid organic urban waste exploitation in the biorefinery plant, were converted into useful chemical building-blocks. After a brief introduction to the topic and the description of the experimental method, each chapter of the work is based on one or more scientific articles eithe
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Kiviaho, Jari. "Fischer-Tropsch synthesis catalysed by cobalt-rhodium and cobalt-ruthenium carbonyl clusters on silica /." Espoo : Technical Research Centre of Finland, 1996. http://www.vtt.fi/inf/pdf/publications/1996/P290.pdf.

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Alshmimri, Sultan. "The behaviour of β-triketimine nickel complexes in ethylene polymerization". Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/the-behaviour-of-triketimine-nickel-complexes-in-ethylene-polymerization(3374d8ea-3d60-46ea-a51a-6a6b5239a1c2).html.

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Seven β-triketimine nickel complexes C1-C7 with composition [L1-7Ni(μ-Br)2NiL1- 7][BArF4]2, where L1 = HC{C(Me)=N(2,4,6-Me3C6H2)}3, L2 = HC{C(Me)=N(2,6- Me2C6H3)}3, L3 = HC{C(Me)=N(2,4-Me2C6H3)}3, L4 = HC{C(Me)=N(2-MeC6H4)}3, L5 = HC{C(Me)=N(2,4,6-Me3C6H2)}2{C(Me)=N(2,6-Me2C6H3)}, L6 = HC{C(Me)=N(2,4,6-Me3C6H2)}{C(Me)=N(2,6-Me2C6H3)}2, and L7 = HC{C(Me)=N(2,4,6-Me3C6H2)}{C(Me)=N(2,6-iPr2C6H3)}2 were synthesized from the interaction of nickel(II) bromide with L1-7 in the presence of NaBArF (BArF = [(3,5- (CF3)2C6H3)4B]−). These complexes were then fully characterized by single-crystal X- ray di
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Barakat, Jean-Baptiste. "Croissance auto-catalysée de nanofils d'InP sur silicium par épitaxie par jets moléculaires en mode vapeur-liquide-solide : application aux interconnexions optiques sur puce." Thesis, Ecully, Ecole centrale de Lyon, 2015. http://www.theses.fr/2015ECDL0027/document.

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L’intégration monolithique de matériaux semi-conducteurs III-V sur substrat de Silicium est essentielle pour le développement de la photonique sur Silicium. L’objectif est de réaliser une micro-source optique à base d’un réseau ordonné de Nanofils (NFs) III-V (InAsP/InP) placés sur un guide d’onde Si. De par leur aptitude à relaxer les contraintes, les NFs sont d’un grand intérêt. C’est dans ce contexte que s’est déroulée cette thèse axée sur la croissance autocatalysée de NFs InP sur Silicium par épitaxie directe. Nous avons ainsi montré que la croissance auto-catalysée de NFs InP denses et v
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