Wait a second...
Nepřihlášený uživatel
iduzel: 52781
idvazba: 60824
šablona: api_html
čas: 19.4.2021 05:13:18
verze: 4827
uzivatel:
remoteAPIs: https://cis-web.vscht.cz/zaverecne-prace/program/
branch: trunk
Obnovit | RAW
Chemie a chemické technologie

Chemie a chemické technologie

Doctoral programme, Faculty of Chemical Technology
CHYBI CHARAKTERISTIKA PROGRAMU

Cílem studijního programu je vědecká výchova absolventů magisterského studia založená na jejich kvalitních teoretických znalostech a předchozích zkušenostech se samostatným řešením dílčích výzkumných problémů v oblasti aplikované chemie a chemické technologie. V průběhu studia si posluchači zejména rozšíří své teoretické znalosti chemie, fyzikální chemie a chemického inženýrství. Tyto znalosti budou dále rozvíjeny formou samostatné odborné práce v oblasti chemické technologie, což umožní prohloubit teoretické znalosti a získat zkušenosti s jejich uplatněním při realizaci konkrétního technologického projektu. Vlastní vědecká výchova bude dále zahrnovat komplexní výzkumný projekt s chemicko-technologickou tématikou, který povede k získání původních publikovaných poznatků obecného charakteru. Posluchači se v rámci volitelných předmětů a v průběhu realizace vlastního výzkumného projektu úžeji profilují v oblastech anorganické a organické technologie, homogenní a heterogenní katalýzy a fotokatalýzy, heterogenních nekatalyzovaných reakcích, membránových procesech, technické elektrochemii, chemických specialitách a vodíkových technologiích. Absolventi doktorského studia tak budou připraveni najít uplatnění v oblasti návrhu a optimalizace chemických technologií, ve vedoucích funkcích ve společnostech zabývajících se produkcí, či zpracováním chemických látek, ve výzkumných a vývojových institucích, ve státní správě a ve firmách s vazbou na technickou chemii (např. stavebnictví, automobilový průmysl).

Careers

Absolvent programu je plně kvalifikován pro obsazení vedoucí pozice v oblasti návrhu, vývoje a optimalizace chemických technologií, stejně tak jako pro řízení chemických provozů, distribuci a uplatnění chemických výrobků na trhu. Je schopen posoudit dopady těchto činností na životní prostředí a zdraví člověka. Je rovněž plně připraven a kvalifikován k samostatné výzkumné a vývojové činnosti v oblasti chemických technologií s využitím jak širokého teoretického základu, tak vlastních zkušeností se získáváním experimentálních a teoretických dat, jejich kritickým zhodnocením a zpracováním a vyvozením závěrů obecného charakteru.

Programme Details

Language of instruction Czech
Standard length of study 4 years
Form of study Full time
Guarantor of study programme prof. Dr. Ing. Karel Bouzek
Programme Code D101
Place of study Praha
Capacity 14 students
Number of available PhD theses 29

List of available PhD theses

Application of microreactors for study of reactions in the field of fine chemicals and pharmaceuticals

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Dr. Ing. Petr Klusoň

Annotation

Microreactors presents devices with small internal dimensions providing unique features for precise chemical processes control. These features are often employed for continuous processes control in field of fine chemicals and pharmaceuticals, where high product quality is required. Despite the high potential for improvement by synthesis in flow, the batch processes still prevail in industry. This thesis proposal therefore aims at the microreactor technology application, adaptation an optimization for continuous synthesis of fine chemicals and pharmaceutical components. Thecandidateshould have a good knowledge of chemical and reaction engineering, organic and inorganic chemistry and has a good relation to experimental laboratory work to become familiar with microreactor technology, as well as with data acquisition and evaluation systems. To complete the delegated tasks, the personal abilities such as independence, creativity, open mind and team work skills will be required. ---------------------------------------------------------

Catalysts for alkaline energy conversion devices

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: Ing. Jaromír Hnát, Ph.D.

Annotation

Alkaline energy conversion technologies represent one of the promising ways to increase the utilization of the installed renewable sources of energy. The advantage of the alkaline technologies lies in the possibility to avoid the necessity of the utilization of the Pt-group metals as catalysts for electrode reactions. On the other hand, the intensity of these technologies is generally lower when compare to alternatives. This work focuses on the synthesis and optimization of the new catalysts, their testing using standard procedures and under the real conditions of the energy conversion devices.

Catalytic transformation of methane to higher value products

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: doc. Dr. Ing. Vlastimil Fíla

Annotation

The high attention on the processes of transformation of methane (C2, C3 hydrocarbons eventually) from natural gas or biogas to higher value products is paid at present time. The processes such as non-oxidative catalytic methane aromatization, selective oxidation to methanol or dimethyl ether are used. The suitable catalyst for chosen process will be developed. The effect of the reaction conditions, catalyst carrier and formation of active phase on catalyst on the methane conversion, catalyst stability and yield of products will be studied.

Development of the bipolar plates for the PEM type fuel cells

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: prof. Dr. Ing. Karel Bouzek

Annotation

Bipolar plates represent an important part of the fuel cell construction set-up. They contribute significantly also to the fuel cells stack production costs. This is because of corossion aggressiveness of their working environment and related material demands. Target of this project is to develop alternative approach based on utilisation of steel based plates surface modified by suitable composite. Inseparable part of the project is CFD modelling of the reactants and products flow in the flow field geometry targeted to optimise their structure.

Electrochemical methods for process water treatment

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: doc. Ing. Martin Paidar, Ph.D.

Annotation

Electrochemical methods are suitable for water treatment due its simplicity and high efficiency. Main disadvantage is usually high price. Therefore electrochemical methods are used in the case of water of high salinity or otherwise contaminated. This is not possible to be treated by biochemical methods. Application of individual method has to be evaluated with respect to the direct process water composition.

Electrochemical synthesis of hypervalent iodine compounds as highly selective organic oxidants

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies

Annotation

A highly selective oxidations of organic compounds belongs, especially in the case of highly added value products, among highly attractive processes. At present, such conversions are usually achieved using oxidation agents based on often toxic transition metals such as Cr(VI), Mn(VII), Ru(VI) či Os(VIII). An interesting „green“ alternatives to these oxidants represent benign hypervalent iodine based organic oxidation agents. The work will be focused on investigation of electrochemical behaviour of these compounds and their precursors. A motivation of the work is to use electrochemical oxidation for the production of hypervalent iodine oxidants allowing their application as industrial scale.

Formation of microparticles from natural extracts using supercritical CO2

Department: Department of Organic Technology, Faculty of Chemical Technology
Theses supervisor: Ing. Marie Sajfrtová, Ph.D.

Annotation

Natural extracts are marketed in the form of liquid, viscous preparations or as powders resulting from the drying of the liquid extract. Formation of powdered extracts helps to decrease the storage costs and increase the concentration and stability of active substances. However, conventional drying methods (spray drying, lyophilization etc.) have several disadvantages, such as the degradation of the product, contamination with organic solvents, and the production of large sized particles. More gentle technic for precipitation and particle formation is a supercritical antisolvent process (SAS). In the SAS process, a liquid solution of a solvent and a bioactive substance is injected into a supercritical fluid, which acts as antisolvent. This leads to supersaturation of the solute, which is compensated by nucleation and particle growth. The aim of the thesis is to evaluate the effects of pressure, temperature, solute concentration etc., on the properties of the particles produced by SAS from particular plant extract. Requirements:
• University degree in food chemistry and technology, natural substances, chemical engineering or organic technology.
• Positive and systematic approach to work duties, motivated, reliable.

Investigation of water electrolysis with proton exchange membrane

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies

Annotation

Water electrolysis represents an important part of the hydrogen economy considered nowadays as a promising approach to the future securing of the human society with electrical energy. Industrial water electrolysis processes established today suffer from several disadvantages when considering its application in the field of energetics. It is mainly its low efficiency and flexibility. Therefore, this process is a subject of interest of numerous research laboratories around the globe. Electrode reaction kinetics, suitable polymer electrolytes and overall process design represent the main issues studied. Corrosion stability of the individual construction materials is also an issue.

Kinetics of catalytic decomposition of N2O on zeolite catalysts

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: doc. Dr. Ing. Vlastimil Fíla

Annotation

The topic of this work is the study of kinetics of N2O decomposition on zeolitic (MFI, FER) and titano-silicates catalysts involving Fe and other transition metals. The work will be focused on kinetic experiments in aiming to develop reliable kinetic model suitable for desing of industrial equipment.

Layered double hydroxides as sorbents for biologically active substances

Department: Department of Organic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: Ing. Iva Paterová, Ph.D.

Annotation

Double layered hydroxides, also known as hydrotalcite or anionic clays, are an important group of materials with a wide range of applications. They can be applied as catalysts, catalyst precursors or ion exchangers, in sorption and decontamination processes. They can also be used for the intercalation of various substances including drugs. The aim of this work will be to prepare these materials, modify their surface with silanol based compounds and to characterize them by suitable methods. The prepared materials will be used as support materials for the immobilization of selected active substances.

Mathematical modelling of chemical and membrane processes using universal simulation programs

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: doc. Dr. Ing. Vlastimil Fíla

Annotation

Universal simulation programs introduce a tool suitable for design of new and optimization of existing industrial technologies. In the frame of this work the static and dynamic models of selected advanced membrane and/or chemical technologies or their parts will be developed using universal simulation programs. By the help of them and computer experiment the behavior of these technologies will be studied. Verification of developed models by experimental data will be implemented. Aim of the work is the improvement of economic and ecological technological parameters. The universal simulation programs from Aspen Technology will be used preferentially.

Mathematical models of composite materials prepared by dispersing solid particles of a filler in a liquid polymer matrix

Department: Department of Organic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Pavel Čapek, CSc.

Annotation

The work is aimed at the mathematical modelling of composite materials, the preparation of which includes the creation of a suspension of solid particles in a liquid mixture of a solvent and a polymer precursor, volume contraction of the suspension caused by evaporating the solvent and by forming a solid polymer matrix. The initial suspension is modelled using the random sequential addition of particles of various shapes. Then, the motion of particles of the filler in the shrinking suspension is simulated. Each model microstructure and the corresponding microstructure of the real composite material sample are characterised using statistical measures and these measures are subsequently compared with each other for the quality of the model to be evaluated. The real microstructures are deduced from digital images of their polished sections that are observed using a scanning electron microscope.

Nanostructured/ composite materials based on TiO2 for photocatalytic processes in gaseous phase

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: prof. Dr. Ing. Josef Krýsa

Annotation

Air polution represents a significant problem which can be conveniently solved by an application of photocatalytic processes. Therefore the aim of the present thesis is the preparation of new photocatalytically active composite materials based on TiO2 and the determination of their adsorption and photocatalytic properties. Titanium dioxide nanotubes prepared by anodic oxidation show a larger active area (compared to planar samples), allowing more efficient removal of polutants from the gaseous phase. The influence of various modifications of TiO2 nanotubes and of operating parameters (flow, humidity and UV intensity) on photocatalytic efficiency will be investigated. The goal is to get the material having at the same time good adsorption properties and at the same time a high ability to remove unwanted volatile substances in the air. Part of the work will use the standard ISO tests for monitoring the kinetics of oxidation reactions (NOx, VOCs) on the surface of the prepared photocatalysts. The important part is the characterization of materials/coatings (XRD, SEM, BET, Raman spectroscopy) and further development of methods allowing the testing of functional properties of the prepared materials/coatings in air treatment.

Photoelectrochemical systems for conversion of solar light

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: prof. Dr. Ing. Josef Krýsa

Annotation

A photoelectric chemical system involving a photoanode, photocathode, membrane and suitable ox/red couple allows the conversion of solar energy into chemical energy. The theme of this thesis is the investigation of possible systems for solar energy conversion with a focus on suitable photoanode and photocathode materials and their combination with suitable electrolytes. Part of the work will be the preparation of selected photoanode or photocathode materials (e.g. Fe2O3, ZnO, WO3, BiVO4, CuO, CuFeO2, etc.) and investigation of their behaviour during long-term photoelectric polarization.
Different methods of preparation (aerosol pyrolysis, spray pyrolysis, etc. ) will be used and the resulting films will be characterised (XRD, GDS, UV-VIS, BET, SEM) and their photo-electrochemical properties (open circuit potential, photocurrent, IPCE) evaluated. The attention will be given to the influence of composition, doping, crystalline phase, layer thickness and porosity.

Photoelectrodes for pollutant removal and hydrogen generation from water using solar light

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: prof. Dr. Ing. Josef Krýsa

Annotation

Production of hydrogen as an alternative energy source/carrier is becoming recently very important and intensively studied process. One of the promising options is direct production of hydrogen from water via solar light. Very important process is also removal of persistent pollutants in waters by advanced oxidation processes, one of them is photo-electrochemical oxidation. The topic of the present thesis is the preparation of semiconductor photoanodes and photocathodes (eg. WO3, BiVO4, CuO, CuFeO2, atd.) for photo-electrochemical water splitting or photo-electrochemical removal of persistent pollutants. Different methods of preparation (aerosol pyrolysis, spray pyrolysis, etc. ) will be used and the resulting films will be characterised (XRD, GDS, UV-VIS, BET, SEM) and their photo-electrochemical properties (open circuit potential, photocurrent, IPCE) evaluated. The attention will be given to the influence of composition, crystalline phase, layer thickness and porosity. The best photoanode and photocathode layers will be applied in the tandem solar photo-electrochemical cell and its efficiency for water decomposition to hydrogen and oxygen by sunlight will be determined.

Polymer electrolytes for energy conversion devices

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: Ing. Jaromír Hnát, Ph.D.

Annotation

Polymer ion selective materials are well established in the many technologies including the environment protection, food industry and large scale production of the basic chemical substances. Energy conversion devices represent the recent but sharply growing field of the ion selective membrane utilization. The work is focused on the complex characterisation of the physio-chemical and electrochemical properties of the developmental ion selective polymer electrolytes.

Prediction and experimental determination of transport properties of mixed-matrix membranes

Department: Department of Organic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Pavel Čapek, CSc.

Annotation

The work is aimed at simulation and experimental determination of transport properties of mixed-matrix membranes that differ from each other in polymer and filler materials. In addition, the membranes containing different fractions of filler particles will be investigated. Statistical treatment of obtained data will accompany the experimental determination of permeability. Permeability will also be modelled on the basis of reconstructed microstructures of the membranes and transport properties of components forming the membranes.

Preparation and characterization of mixed matrix membranes for gas separation

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: doc. Dr. Ing. Vlastimil Fíla

Annotation

Gas membrane separation represents one of the perspective and energy saving alternative with respect to the present separation processes (PSA, TSA etc.). In the frame of this work the mixed matrix membranes, combining the perspective properties of the both, microporous and polymeric membranes, will be prepared and characterized. The microporous material e.g. ZIF-8, silicalite-1, ETS, FAU, TS-1, AFX, MOF will be used as filler and combined with polyimide matrix. The key issue of mixed matrix membranes preparation which needs to be solved is the adhesion and interface interactions of filler and polymer because of their effects on compactness and selectivity of membrane. The aim of this study is evaluation of different possibilities of microporous and polymer phase modifications with respect to the compactness of membranes and their selectivity and permeability in selected systems of hydrocarbons, CO2 and H2.

Preparation of electrospun nanofibrous carriers for deposition of catalyst nanoparticles and immobilization of living cells

Department: Department of Organic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: Ing. Karel Soukup, Ph.D.

Annotation

The main aim of the proposed PhD project is focused on assessment of the specific properties of the novel polymeric nanofibrous materials prepared by electrospinning technique in applications as effective catalyst supports and promising scaffolds for living cells (in cooperation with the University of South Bohemia). Other targets of this project will be specifically addressed to the optimization of the electrospinning process parameters with respect to properties of the prepared supports, deposition of the catalytically active centers or living cells. Additionally, assessment of the effect of support microstructure on the phenomenological kinetics of model reactions and adhesion of the cells will be performed as well. Studied model reactions will involve both reaction in gas-phase (the total oxidation of volatile organic compounds) and liquid-phase (selective hydrogenation of unsaturated hydrocarbons). Required education and skills:
• Master degree in chemical technologies, chemical engineering or biotechnology;
• methodical and creative approach to work;
• willingness to perform experimental work and learn new issues.

Procedures for design and installation of relief valves in the refinery-petrochemical industry

Department: Department of Organic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Tomáš Herink, Ph.D.

Annotation

In the field of industrial safety, relief valves hold a key and absolutely irreplaceable role. They are the last autonomous barrier, which are able to protect technological equipment against overpressure and thus avert extraordinary situations leading often to serious accidents. However, the inappropriate design, setting and operation of these technological elements can paradoxically contribute to the loss of integrity of the equipment during releasing pressure from the protected pressure equipment and cause an even more serious situation. Although the role of relief valves in industrial practice is absolutely indispensable, the relevant theory of their design, selection and appropriate installation is not known to the wider technical community in the field of chemical technology design. The doctoral dissertation thesis will focus on the comparison of international standards and the so-called "best engineering practice" and corresponding recommendations for the design and selection of relief valves. The findings will be compared with industrial practice in the field of refining and petrochemical technologies with different years of installation and commissioning from the 70s of the 20th century to the present. An analysis will be performed on individual case studies, including a detailed assessment of the availability and completeness of operational documentation, definition of individual relieve scenarios, capacity design of a relief valve or a set of relief valves and appropriate design and arrangement of relevant piping systems as well. The calculations will be performed using mathematical models in steady state and dynamic mode in Aspen Hysys, which also contains a specialized tool for assessment and designing relief systems for pressure vessels. Individual tools will be used for calculations and will be evaluated in terms of complexity and usability for common engineering practice. The determination of frequent shortcomings and deviations from standards and recommendations in the relief valve systems design and the resulting risks evaluation will be the output of the doctoral thesis. Basic recommendations for industrial practice will be defined. The verification of relief valves and their modifications on operating technologies and at the same time, new relief valves designing procedures will be described. The individual recommendations will be aimed at minimizing operating and investment costs in compliance with all safety elements and rules.

Processing possibilities of materials derived from thermal cracking of waste polymers

Department: Department of Organic Technology, Faculty of Chemical Technology
Theses supervisor: Ing. Adam Karaba, Ph.D.

Annotation

Processes design to dispose of waste polymer material, such as plastics and rubber, are being currently introduced in the industry. In these processes, the material undergoes slow pyrolysis or gradual thermal cracking of original polymers and potentially usable materials are formed. For example, condensed gasses from the process represent a certain kind of fuel and are currently co-incinerated with other fuels in powerful boilers. But these material streams can represent a significant source of hydrocarbon for the industry. A potentially better way is to engage such a material stream into an appropriate node in the refinery-petrochemical complex. Specifically, the steam-cracking process has the potential to transform the stream into valued products. This would replace current energetic use by the material use, which is more valuable in terms of resources usage and usually is economically more beneficial. The composition of these condensates is strongly dependent on the input material and conditions of the primary thermal treatment and therefore the composition varies in a broad range. These condensates may contain valuable hydrocarbons fractions, but also oxygen-, sulfur-, and nitrogen-containing organic compound, halogens, metals in the form of salts, even solid particles which may not evaporate under standard operating temperatures. Therefore, such a material stream cannot be connected directly to the processing, but necessarily will require some form of pre-treatment. Moreover, it is necessary to evaluate the potential impact of these impurities presence on the following process (and next following processes) from many different points of view, e.g. catalyst poisoning in following processing steps, contamination of final product or corrosion, of the equipment.

Rational design of oxides for anodic electrolytic reactions

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: doc.Ing. Petr Krtil, CSc.

Annotation

The work will focus systematically approach to description activity and selectivity of oxide materials in gas evolving anodic processes namely in oxygen and chlorine evolution. Primary attention will be paid to the behavior of modelf binary in the systems based on Ru-Ti-Me (Me= transition metal) identified as prospective materials in computational studies. General relationships between the local structure of the active sites on oxides and their activity in electrocatalytic processes will be formulated and subsequently used in formulation of novel class of anodic electrocalytst.

Self-cleaning and antibacterial coating based on TiO2 and ZnO

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: prof. Dr. Ing. Josef Krýsa

Annotation

The main scope of this work is preparation of photocatalytic active coatings/ paints based on TiO2 a ZnO on the appropriate substrate (ceramics, glass, metals, facades, hydraulic binders) by different methods. The important part of the work is films characterization (XRD, SEM, Raman spectroscopy) and development of methods for testing photoactivity and hydrophilic and antibacterial properties of prepared layers. Studied parameters will be the methods of precursor deposition (dip-coating, spraying) and the influence of the binder in the coating and the substrate.

Separation of humic substances from water by membrane processes

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Martin Zlámal, Ph.D.

Solvent effects in acid catalyzed reactions

Department: Department of Organic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies

Annotation

Acid-catalyzed reactions are of large importance in the production of fine chemicals. The influence of the type of acid catalyst, type of acid sites, temperature, and occasionally pressure on the reaction course is widely studied. Used solvent is often chosen based on preliminary experiments or on literary data. Recently, the trend showing the influence of the solvent on the reaction course is visible. Typically, the properties of the solvent such as basicity and polarity are included in the discussion. The aim of the work will be the study of the solvent's influence on the course of the chosen acid-catalyzed reaction. The influence of the solvent properties will be the goal. Possible synergy between solvent and catalyst from the point of view of selectivity or reaction rate will be evaluated. The used catalysts will be characterized by available methods (XRD,TPD pyridine, IR, UV-Vis, etc.). The interaction solvent-acid site-substrate will be discussed. For the evaluation also theoretically based calculation may be used.

Study of inorganic ions separation by nanofiltration

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Martin Zlámal, Ph.D.

Technological utilization of streams comprising methylated cyclopentadiene derivatives

Department: Department of Organic Technology, Faculty of Chemical Technology
Theses supervisor: doc. Ing. Tomáš Herink, Ph.D.

Annotation

The Diels-Alder reaction of cyclopentadiene and methylcyclopentadiene forms methyl derivatives of dicyclopentadiene. There are three positional isomers of methylcyclopentadiene therefore the Diels-Alder cycloaddition reactions result in a mixture of a number of co-dimers, referred to as methyldicyclopentadienes (MDCPD) and dimethyldicyclopentadienes (DMDCPD). The mixture of MDCPD and DMDCPD isomers is present in products of the pyrolysis of hydrocarbon mixtures. Due to the chemical reactivity of these co-dimers, the industrial end use can be assumed in applications such as the production of unsaturated polyester resins, epoxy resins or modified hydrocarbon resins. The main objective of the dissertation will be to assess the possibilities of using the mixtures of MDCPD and DMDCPD for the preparation of various types of resins, with regard to the variability in the composition and the presence of methyl groups. The obtained results will define the industrial possibilities of using MDCPD and DMDCPD mixtures and will be used for the conceptual technology design.

Titanium oxides and titanates for advanced applications

Department: Department of Inorganic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: Ing. Jan Šubrt, CSc.

Annotation

Li-ion batteries are one of the most promising electrochemical power sources. Ti-based materials such as Li4Ti5O12, Li2Ti3O7, TiO2-B and H2Ti3O7, are considered as important anodes for Li-ion batteries due to their high safety and excellent cycling stability. Li-ion battery (LIB) technology (typically using carbon materials as the anode) faces serious challenges if it is to take over the hybrid electric vehicles and stationary power sources. Ti-based compounds, especially Li4Ti5O12 have been demonstrated as the most promising anode materials for large-sized LIBs since they exhibit excellent cycling reversibility and a high operating voltage to ensure improved safety. However, the rate capability of these Ti-based materials are relatively low because of a large polarization at high charge–discharge rates. To enhance its electrical conductivity, ion doping and surface modification, and ionic diffusivity by designing various nanosized materials were used. A new preparation method will be used based on the extraction of sulphate ions from the crystals of titanium sulphate hydrates and their replacement with hydroxyl groups in aqueous alkali solution. The method leads to nanostructured metatitanic acid or alkali titanates and is suitable also for metal doping the material.

Two-dimensional materials as a catalytic support

Department: Department of Organic Technology, Faculty of Chemical Technology
Also available in programme: Chemistry and Chemical Technologies
Theses supervisor: Ing. Martin Veselý, Ph.D.

Annotation

Two-dimensional (2D) materials exhibit increased catalytic activity in 2D material supported metallic nanoparticles in comparison with their bulk counterparts. The increase in activity attributes to specific 2D support-nanoparticle interactions. The project is focused on an investigation of the specific interactions for graphene, as reference support, and ‘materials beyond graphene’ based on phosphorus, arsenic, antimony, and bismuth. To suggest a mechanism of the specific interactions, we will investigate a spatial-temporally resolved catalytic activity of supported catalyst prepared by lithography and chemical routes. By tuning of a spatial distribution and size of the active sites, we will identify individual contributions, including an exclusive effect of the support, causing the increase in catalytic activity. The suggested mechanism, also verified by standard methods of catalytic testing, will bring a new insight into the understanding of nanoparticles-2D support interaction and open new possibilities for the rational design of 2D material supported metal catalysts.


UCT Prague
5 Technická
166 28 Prague 6 – Dejvice
IČO: 60461337
VAT: CZ60461373

Data mail: sp4j9ch

Copyright UCT Prague 2014
Informations provided by Department of International Relations, Department of R&D, technical service by Computer Centre
switch to desktop version