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Feasibility study: Hg removal technology using electrochemical methods - large unit and its comparison with alternative technology
Zach, Boleslav ; Veselý, Václav ; Šyc, Michal ; Puchýř, R. ; Foltýn, M. ; Přemyslovský, P. ; Pařízek, V.
In the introductory chapters, an introduction to the technology for Hg capture from combustion processes using electrochemical methods (membrane electrolyzer)and the design of a unit with capacity applicable to a typical power plant unit was made. This technology has not fully demonstrated its effectiveness from laboratory tests in semi-operational trials. These findings have been taken into account in the design of the unit for a larger power plant, therefore the design considers the use of more units in parallel, which places demands on the built-up space. The number of units used and the size of the built-up area is then matched by the high cost of the investment. Although this is a technology that does not consume any chemicals or sorbents - only electricity - it is an investment and operationally expensive technology, as can be seen from the comparison with alternative technologies. A comparison of the investment costs and cumulative expenditure (investment, reinvestment, maintenance and operating costs) for the electrochemical technology with electrolyzer and the two alternative technologies shows that if the economic aspect alone is the decisive criterion for the choice of technology, the technology of dosing Na2S solution into the scrubber absorber solution for flue gas treatment clearly comes out best at current prices.
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Semi-operational verification of mercury removal from flue gas by electrochemical methods
Šyc, Michal ; Grolig, O. ; Přemyslovský, P. ; Pařízek, V.
This is the final report of the project Pilot-scale verification of mercury removal from flue gas by electrochemical methods TK04020330 summarizing the course of activities for the last year of the project and the results achieved during the project. The content of the report is a description of the commissioning and operation of the pilot unit designed and constructed during the project. The results of laboratory experiments, pilot-scale verification of the technology, and testing of mercury oxidation in flue gas. The conclusions drawn from the experimental results are included in the report.
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Simulations of the magnetic domains dynamics in antiferromagnetic CuMnAs
Pařízek, Vojtěch ; Němec, Petr (advisor) ; Pokorný, Vladislav (referee)
Antiferromagnetic materials are promising materials for implementation in spintronic memory devices. In contrast to the more well-known ferromagnetic materials, which are already used in magnetoresistive random access memory (MRAM) devices, they possess multiple advantages, such as no net magnetization and ultrafast dynamics. Antiferro- magnetic memories store information through the orientation of the antiferromagnetic ordering. The magnetoresistance of the materials could be used for the electrical readout of the antiferromagnetic structure. In recent experiments in an antiferromagnet CuMnAs after applying a series of electrical or optical pulses, a change in resistivity associated with a significant decrease in the size of antiferromagnetic domains was observed. This means that one is able to perform electrical or optical writing in antiferromagnets. The state persists for timescales that exceed the magnetic dynamics timescales by many orders of magnitude. Here, we present the findings of the antiferromagnetic domain dynamics simulations in CuMnAs, specifically focusing on the process of small domain relaxation leading to the formation of larger domains. The simulations were based on atomistic spin dynamics. For all temperatures, a growth of magnetic domains was detected. However, the size of the...
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Technical report on progress and achievements for 2022
Šyc, Michal ; Grolig, O. ; Přemyslovský, P. ; Pařízek, V.
The response of the research base has sparked interest in validating more advanced mercury separation techniques from flue gas than BAT. These techniques maintain the existing fuel base and focus on the wet scrubbing process of acid gases. The Institute of Chemical Process Fundamentals has developed an original electro-separation technology of the soluble form of mercury from the wet limestone slurry, where the process simultaneously oxidizes the metallic mercury to achieve the desired capture.
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Analysis of current situation of financial consulting in the Czech republic
Pařízek, Vojtěch ; Gruber, Petr (advisor) ; Tuček, Miroslav (referee)
This bachelor thesis "Analysis of current situation of financial consulting in the Czech republic" analyzes past and current situation of financial advisory services. It refers to the historical development of insurance and brokerage activities as a whole. One of the main objectives of this study is to determine how the public understands this issue and to verify small clients' attitude to financial advisory services. The next objective is to explore the rules and regulatory requirements of the problem and try to determine whether these requirements are right and correct.
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