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Bed Reactor, Part IV, Final Research Report, Task C and G, Project FT-TA/039, 2007
Jiřičný, Vladimír ; Staněk, Vladimír ; Stavárek, Petr ; Vychodilová, Hana ; Vlček, Dalibor ; Karfík, David ; Tukač, V. ; Chyba, V. ; Lederer, J. ; Kolena, J. ; Kubička, D. ; Hanika, Jiří
The results of the research of hydrogenation reaction running in Trickle bed reactor (TBR) under condition of steady state or periodic pulse modulation of liquid feed are presented in the report. The effect od pulse period and split on reaction conversion including optimal operation conditions was determined. Yhe extensive hydrodynamic study of TBR was conducted and judged in terms of pressure drop profiles along the catalytic layer, liquid hold up and residence time distribution. Results of hydrodynamic study confirm determination of optimal operating conditions related to maximum conversion.
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Liquid Holdup in Hydrogenation Trickle Bed Reactor
Stavárek, Petr ; Jiřičný, Vladimír ; Staněk, Vladimír ; Hanika, Jiří ; Lederer, J. ; Tukač, V.
Experimental study of liquid holdup in trickle bed reactor with organic liquid is presented. On-line column weighting method was employed for liquid holdup measurements. Liquid holdup was measured in wide range of gas and liquid flow rates covering film and pulse flow regime. Porous and nonporous bed packing was used. Measured liquid holdup values were in good agreement with the predictions of empirical correlation from literature. Presented results are a part of the project New operational methods of trickle bed reactors – intensification and safe control supported by Ministry of Industry and Trade of the Czech Republic (grant no. MPO FT-TA/039).
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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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Transition Phenomena in Trickle Bed Reactor, Part IV, Intermediate Research Report, Task C, Project FT-TA/039, 2007
Jiřičný, Vladimír ; Staněk, Vladimír ; Hanika, Jiří ; Vychodilová, Hana ; Stavárek, Petr ; Vlček, Dalibor ; Karfík, David ; Tukač, V. ; Chyba, V. ; Lederer, J. ; Kubička, D.
This report sumarizes project results obtained from December 10th 2006 to July 31st 2007. Working team effort was concentraced on residence time distribution measurement by refractometric method in laboratory trickle bed reactor with organic liquid. Method was tested giving reproducible results.
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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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