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Solving structural models using the finite element method
Handlová, Marcela ; Martinásek, Josef (referee) ; Vlk, Zbyněk (advisor)
The work deals with the analysis of plane structures using the finite element method. Matlab programs are created to perform the calculations required for analysis with beam and plane four-node finite elements. With their use, a load-bearing bridge structure acting as a seven-span continuous beam is then analysed. By simplifying this structure, two models are created. The first model has a constant cross-section, the second one has haunched beams. The models are analyzed using finite elements of variable sizes and in the end, the results for different elements and models are compared.
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Hydrogenation of Tar Precursors in Pyrolysis Gasoline.
Sazanov, Z. ; Tukač, V. ; Chyba, V. ; Handlová, M. ; Hanika, Jiří ; Lederer, J. ; Kolena, J.
Experimental series were focused on catalytic hydrogenation of unsaturated components in pyrolysis gasoline: styrene, consecutive hydrogenation of dicyclopentadiene (DCPD) via dihydrodicyclopentadiene (DHDCPD) to tetrahydrodicyclopentadiene (THDCPD), indene, allylbenzene, 4-methylstyrene, 3-methylstyrene and 4-methylstyrene. Hydrogenation was investigated at temperature 30, 40 a 60°C and under hydrogen pressure 2 a 5 bar using Noblyst Degussa 1505 (0,1 hm. % Pd/ ? - Al2O3) catalyst.
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Unsaturated Hydrocarbons Hydrogenation in Trickle Bed Reactor during Periodic Feed Rate Modulation.
Chyba, V. ; Tukač, V. ; Handlová, M. ; Hanika, Jiří ; Sazanov, Z. ; Lederer, J. ; Kolena, J. ; Jiřičný, Vladimír ; Stavárek, Petr ; Staněk, Vladimír ; Kubička, D. ; Kubičková, I.
Effects of following feed rate modulation parameters on styrene and dicyclopentadiene hydrogenation in toluene and pyrolysis gasoline were investigated in pilot plant experiments: period length, its split, liquid feed rate and liquid rich to liquid poor period parts ratio. The catalyst deactivation was investigated too. Pilot plant results indicated 10% higher trickle bed reactor throughput by application of periodic feed rate modulation in comparison to steady state operation regime.
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CFD Model of Pyrolysis Gasoline Hydrogenation in Trickle Bed Reactor.
Tukač, V. ; Handlová, M. ; Hanika, Jiří ; Chyba, V. ; Sazanov, Z. ; Lederer, J. ; Kolena, J. ; Jiřičný, Vladimír ; Stavárek, Petr ; Staněk, Vladimír
Paper proposes hierarchic structure of mathematical models of pyrolysis gasoline hydrogenation in trickle bed reactor using egg-shell type catalyst. Model dimensions cover an interval from 3 mm of catalyst pellet diameter over a string of several catalyst pellets trickled by reaction mixture to finaly pilot plant trickle bed reactor of diameter 100 mm. Hydrodynamics, transport phenomena and chemical reaction kinetics were desribed by differential balances which were solved by a finite difference method using COMSOL Multiphysics software.
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Pyrolysis Gasoline Hydrogenation in Trickle Bed Reactor with Periodically Modulated Feed Rate.
Tukač, V. ; Hanika, Jiří ; Chyba, V. ; Handlová, M. ; Sazanov, Z. ; Lederer, J. ; Kolena, J. ; Jiřičný, Vladimír ; Stavárek, Petr ; Staněk, Vladimír
The effect of feed rate modulation on efficiency of pilot plant trickle bed reactor during pyrolysis gasoline hydrogenation using palladium supported catalyst was investigated. Enhancement factors for unsaturated hydrocarbon components were evaluated from experiments made both in steady state and dynamic operation modes. Feed rate modulation mode prefered hydrogenation of minority components of the feed.
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