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WP5 Status Report Months 31 to 50
Křišťál, Jiří ; Stavárek, Petr ; Jiřičný, Vladimír
Within WP5 in this reporting period focused on the development of a new intensified reactor concept for sulph(on)ation reaction. Based on the previous hydrodynamic experiments and mathematical models we designed a new reactor – microSulphonator. We also constructed and manufactured several prototypes that were later tested with model fluids. Experimental data were used for the validation of the models defined previously. Results of this period served as a basis for the final microSulphonators to be tested in the PGB pilot plant during the demonstration phase of the F3 project.
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Oxidation of Volatile Organic Compounds in a Multifunctional High Temperature and High-Pressure Cassette Microreactor
Vajglová, Zuzana ; Stavárek, Petr ; Křišťál, Jiří ; Jirátová, Květa ; Ludvíková, Jana ; Jiřičný, Vladimír
Analysis of the total oxidation of ethanol including reaction intermediates data obtained in the examined reactors on the temperature showed that differentmaterial applied in the construction of reactors and their arrangement give slightly different results of catalyst testing, the ones obtained from microreactor being more precise. More precise control of reaction temperature due to higher heat transfer capabilities and limited backmixing of reaction mixture in a packed bed microreactor is advantageous and leads to the more accurate results of oxidation catalysts testing. However, it is necessary to ensure in order the material used for the reactor construction did not affect the catalytic reaction. The results accomplished confirm that microreactors are not only suitable for performing of catalytic reactions in a laboratory scale but also promising way for creation of new, safer and cleaner production processes.
Plný tet: SKMBT_C22014050212452 -  PDF
Plný text: content.csg - PDF
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Hydrodynamic and Heat Transfer Model of a Gas-Liquid Microreactor
Křišťál, Jiří ; Stavárek, Petr ; Staněk, Vladimír ; Jiřičný, Vladimír ; Simoncelli, A. ; Vanhoutte, D. ; Tarchini, R. ; Talford, M. ; Hass-Santo, K. ; Benzinger, W.
In this contribution we present a hydrodynamic and heat transfer model of a microreactor for a gas-liquid reaction. In the course of formulation of the model, we considered the characteristic features of the studied system – the gas-liquid flow pattern and the change in physical properties induced by pressure and temperature variation along the microreactor. Based on the input information (gas and liquid flow rates, compositions, temperatures), the model calculates the two-phase pressure drop and outlet temperature as the principal result. These results serve as a basis for the design of an intensified pilot scale microreactor.
Plný tet: SKMBT_C22012102413550 - PDF
Plný text: content.csg - PDF
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BIORAF – Biorefinery Research Centre of Competence
Topka, Pavel ; Hajšlová, J. ; Demnerová, K. ; Cepák, Vladislav ; Vosátka, Miroslav ; Jiřičný, Vladimír ; Jandejsek, Z. ; Kopenec, J. ; Šmejkal, M. ; Kaštánek, P. ; Šolcová, Olga
The project, which started in 2012, creates an interdisciplinary center with high innovation potential for sustainable utilization of renewable sources, and will bring the Czech Republic to the leading position in next-generation biorefinery within next eight years. The project links the private sector with experts from different fields of science (e.g., biosciences, phycology, analytical chemistry, enzymology, microbiology, chemical and biochemical engineering, material engineering, etc.).
Plný tet: SKMBT_C22012102413542 - PDF
Plný text: content.csg - PDF
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Gas-Liquid Flows in Thin-Gap Electrochemical Microchannels – PIV Study
Záloha, Petr ; Křišťál, Jiří ; Jiřičný, Vladimír ; Aubin, J.
We focused on the study of the local hydrodynamics of liquid in gas-liquid flow in thingap microchannels (width 10 mm, depth 2 mm - 0.1 mm). Two-phase flow was obtained by injecting bubbles into the channel to mimic the gas generation during electrochemical reactions. The liquid flow velocity vectors were obtained by the PIV technique. Single phase measurements were used to verify our method by comparison with the theoretical velocity profiles. Local velocity fields around single bubble were evaluated.
Plný tet: SKMBT_C22012102413481 - PDF
Plný text: content.csg - PDF
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