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    Wyświetlanie 1-4 z 4
    Tytuł:
    Analiz i modelirovanie teploobmennykh ustrojjstv v kontaktnykh apparatakh
    Analysis and simulation of heat exchange devices in the contact devices
    Autorzy:
    Spinov, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/77965.pdf
    Data publikacji:
    2014
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    heat exchange
    contact
    mass transfer
    heat transfer
    contact device
    energy efficiency
    mathematical model
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 5
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energetic Efficiency of Mixing and Mass Transfer in Single Phase and Two-Phase Systems
    Autorzy:
    Bałdyga, J.
    Jasińska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/184853.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chemical test reaction
    energetic efficiency
    mass transfer
    mixing
    chemiczne reakcje testowe
    wydajność energetyczna
    transfer masy
    mieszanie
    Opis:
    In this work a concept of energetic efficiency of mixing is presented and discussed; a classical definition of mixing efficiency is modified to include effects of the Schmidt number and the Reynolds number. Generalization to turbulent flows is presented as well. It is shown how the energetic efficiency of mixing as well as efficiencies of drop breakage and mass transfer in twophase liquid-liquid systems can be identified using mathematical models and test chemical reactions. New expressions for analyzing efficiency problem are applied to identify the energetic efficiency of mixing in a stirred tank, a rotor stator mixer and a microreactor. Published experimental data and new results obtained using new systems of test reactions are applied. It has been shown that the efficiency of mixing is small in popular types of reactors and mixers and thus there is some space for improvement.
    Źródło:
    Chemical and Process Engineering; 2017, 38, 1; 79-96
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of new chemical test reactions to study mass transfer from shrinking droplets and micromixing in the rotor-stator mixer
    Autorzy:
    Bałdyga, J.
    Kotowicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/184911.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    efficiency of mixing
    mass transfer
    micromixing
    rotor-stator mixer
    test reaction
    wydajność mieszania
    transfer masy
    mikromieszanie
    reakcja testowa
    Opis:
    A pair of fast competitive reactions, neutralization and 2,2-dimetoxypropane (DMP) hydrolysis, has been applied do study mass transfer and micromixing in a T 50 Ultra-Turrax® - IKA rotor-stator device. In experiments the dispersed organic phase containing p-Toluenesulfonic acid (pTsOH) dissolved in diisopropyl ether, whereas the continuous phase was represented by the aqueous solution of sodium hydroxide, 2,2-dimetoxypropane (DMP) and ethanol. During mixing a fast mass transfer of a solute (pTsOH) from organic phase droplets, which were shrinking due to fast dissolution of the organic solvent, was followed by micromixing and chemical reactions in the continuous phase. Measured hydrolysis yields were applied to express effects of mixing on the course of chemical reactions. Modeling was based on application of models describing drop breakup, mass transfer in the liquid-liquid system and micromixing. Combined effects of mass transfer and drop breakage on drop population were expressed using the population balance equations. The model has been used to interpret experimental results, in particular to identify the efficiency of mixing.
    Źródło:
    Chemical and Process Engineering; 2017, 38, 3; 477-489
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structured catalytic reactor for VOC combustion
    Autorzy:
    Kołodziej, A.
    Łojewska, J.
    Kleszcz, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/778459.pdf
    Data publikacji:
    2007
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    katalizator strukturalny
    siatka
    transport masy
    structured catalyst
    gauze
    mass transfer
    diffusional limitation
    performance efficiency
    Opis:
    VOC emission has recently become a challenge for environmental protection. Catalytic combustion seems a promising method of VOC removal, however, there are still more specific demands concerning the process. The reactor design has to assure enhanced transfer properties accompanied by low flow resistance to reduce the pumping costs. Neither the packed beds nor the classic ceramic monoliths are able to fulfil the requirements. To solve the problem we propose a wire gauze structure composed of several gauze sheets staked. A number of mass transfer and flow resistance experiments were performed for two gauze types and correlations were derived for the Sherwood number and the friction factor. The results were found to be in a reasonable agreement with the literature available. The studied gauze structures were compared with a classic monolith for the assumed case study. The calculated length of the gauze structured reactor was significantly shorter, up to ten times, when compared with a classic ceramic monolith, but the pressure drop was higher.
    Źródło:
    Polish Journal of Chemical Technology; 2007, 9, 1; 10-14
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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