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Design of transit bus
Semerák, Jan ; Pelikán, František (referee) ; Zvonek, Miroslav (advisor)
The diplom work is focused on the design of transit bus. I pointed out two aim: design from the view of future the perspektive; environmental drive and create timeless bus design, which should be correspond with the drive of near future. It was chosen the most ecological drive with help of hydrogen and fuel cells. This drive was developed in detail. Like reserve and helpful energy source was used ultrakapacitors and fotovoltaic cells. Bus design tries to realize the future requirement of carriers and regarding to its oscillating along big cities so represent with its design the used drived unit. The internal ordering of interior tries to realize the together and future reguirements on the sit ergonomics, store of bagages, hygienic requirements and good lookout of passengers. The name and logo of transit bus arrise from reference to fuell, environment and fuell cell.
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Application of Commercial Sorbent into Coal-derived Syngas Desulfurization Field for Clean Coal technologies Development
Chien, H.-Y. ; Chyou, Y.-P. ; Svoboda, Karel
Advanced applications of producer gas (e.g. fuel cells, catalytic processes for liquid fuels production) require deep gas cleaning. Dry desulfurization technologies of fuel gas select appropriate sorbents according to material’s physical and chemical properties like sulfur capacity, attainable sulphur concentration in gas, price, etc.. The properties of a commercial sorbent were determined by means of XRD, ICP-OES, SEM and surface area measurement. The main components of the sorbent were ZnO, CuO and alumina. The content of effective metal oxides for desulfurization reaches approx. 70% , the surface area is 90.8 m2/g. The sorbent has been used as a moderate-temperature desulfurization agent (300-600oC) for H2S removal from model gas in a fixed-bed reactor. Its H2S removal properties are promising for application in clean coal technology field. The theoretical amount of sulfur capacity according to effective metal oxide content in the sorbent is 20.5 g-S/100 g.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22015061614110 - PDF
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Low temperature fuel cell for ultra-light-plane
Hladiš, Lukáš ; Brázdil, Marian (referee) ; Pospíšil, Jiří (advisor)
This thesis deals with the concept of propulsion for ultralight plane with using fuel cells technology. Here are described the individual kinds of fuel cells and possible fuel. Furthermore it is listed the calculation of low-temperature fuel cell H2 - O2 with polymeric membrane (PEM). The thesis includes also a part with the design drawings of the proposed solutions.
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Low Temperature Fuel Cells H2-O2 with Anionic and Bipolar Membrane
Barath, Peter ; Sedlaříková, Marie (advisor)
The doctoral thesis deals with investigation of the catalysts and ionexchanege membranes for fuel cells H2-O2. The work contains the basic principles of chemical reactions, thermodynamic aspects and kinetic properties in PEM fuel cells.Ion-exchagers based on fluorinated polymer sulfonic acids known as NAFION are used in most cases. These compounds are very expensive. Also a strong corrosive attribute requires platinum as a catalysator. These facts make the membrane fuel cells fully non-competetive with e.g. internal combustion engine in spite of all ecological advantages of this electrical power source. The subject of doctoral thesis is research and development of compounds for the composite electrode materials base on NiOx, Ni-Pd and Raney Ni suitable as catalysts a nd alkaline or bipolar ionexchange membranes for electrochemical fuel cells.
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Low temperature Fuel Cells
Kazda, Tomáš ; Novák, Vítězslav (referee) ; Barath, Peter (advisor)
The Bachelor’s thesis is aimed at the low-temperature fuel cells and their usage in cars and mobile applications. In the theory part of this project is described the evolution of the fuel cells in last years and historically as well. Further there are described their functions and particular kinds of the fuel cells with aim at low-temperature cells. In the practical part of this thesis we were making different kinds of carbon mixtures. We have been doing measurements of mixtures on rotate disk electrode and in the experimental fuel cell. At the end of the work are experimentally evaluated different types of carbon materials with different contents of platinum depositing. The results are evaluated using electro analytical methods, using this evaluation to optimize the composition of the material used as electrode material in fuel cells.
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Fuel cells
Ralbovský, Peter ; Škvařil, Jan (referee) ; Chroboczek, Libor (advisor)
This bachalor’s thesis deals with a fuel cells technology, their principle and division. There’s also describes how to obtain hydrogen from natural gas as fuel. Furthermore, there are advantages and disadvantages of fuel cells. At the end of the work there are applications of fuel cells and their use in cogeneration and trigeneration.
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Investigation of new anode materials for methanol polymer fuel cells
Fiala, Roman ; Sofer, Zdeněk (referee) ; Matolín, Vladimír (advisor)
We investigated new types of anode catalysts for polymer membrane fule cell (PEMFC). Pt doped CeO2 thin lms were deposited by rf-magnetron sputtering on carbon nanotubes (CNTs) directly grown on GDL by using CVD. We observed considerable increase of speci c power by 1000 times and more in comparison with standard PtRu anode catalyst. For this new anode system we obtained the speci c power of 44.3 W/mg(Pt). The interaction of Pt with CeO2 layers with di erent substrates was investigated by using photoelectron spectroscopy. The results showed that platinum was in cationic state and the Pt2+/Pt4+ ratio was dependent of substrates materials. We also demonstrated that the performance of direct methanol fuel cell with Pt and PtRu catalyst can be dramatically increased simply by adding sodium hydroxide to methanol fuel. Cell voltage and power output characteristics were studied in dependence on current, temperature and concentration of sodium hydroxide. Endurance test was performed and the fuel cell exhibited stable response. Power density of 80.7 mW/cm2 was recorded for 2 M methanol/2 M sodium hydroxide fuel 30řC.
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Simulation of steady-state and dynamic behavior of low-temperature fuel cell
Smugala, Ondrej ; Radil, Lukáš (referee) ; Ptáček, Michal (advisor)
This bachelor´s thesis is concerned with mathematic modelling of low temperature proton exchange membrane fuel cell (PEMFC). First part of the thesis is focused on explaining the principle of production of electricity by this type of source. The main advantages and disadvantages of this technology are presented there. A division of fuel cells according to the stack temperature and the kind of used electrolyte is also made in this part. Typical technical information is mentioned for every type of fuel cell. The rest of thesis is concerned with the PEMFC. Firstly there is a description of construction of fuel cell and a presentation of applications in the industry. The second part of work includes a mathematical description of steady and dynamic behavior of fuel cell which is based on relations among fundamental parameters and quantities. The other part contains all results of simulation which was made on a model created in Matlab Simulink. Comparison of the results of real measurement with the results of simulation which was performed on a modified model is provided in the last part of thesis.
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