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Wyszukujesz frazę "Lubkowski, Krzysztof" wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Enthalpy of isopropanol adsorption on zeolite
    Autorzy:
    Jabłoński, Maciej
    Dzienisz, Alicja
    Sawicka, Marta
    Wróblewska, Elwira
    Lubkowski, Krzysztof
    Dąbrowska, Grażyna
    Piz, Mateusz
    Sreńscek-Nazzal, Joanna
    Powiązania:
    https://bibliotekanauki.pl/articles/779858.pdf
    Data publikacji:
    2019
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Enthalpy
    Adsorption
    Zeolite
    HiSiv 3000
    Isopropanol
    Opis:
    The enthalpy of isopropanol adsorption on ZSM-5 (Zeolite Socony Mobil Framework Type MFI) was determined by the static adsorption method at the temperature range from 20°C to 100°C. Langmuir and Huttig models of equilibrium adsorption have been used to calculate the enthalpy of isopropanol adsorption at these conditions. Adsorption isotherms determined by the flow method at 20°C and 30°C have been also used in the calculations. The obtained values of isopropanol adsorption enthalpy were compared with the values of isopropanol evaporation enthalpy and with the results obtained from isopropanol and water desorption measurements with thermogravimetry and differential scanning calorimetry methods.
    Źródło:
    Polish Journal of Chemical Technology; 2019, 21, 4; 58-65
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ethylcellulose as a coating material in controlled-release fertilizers
    Autorzy:
    Lubkowski, Krzysztof
    Smorowska, Aleksandra
    Sawicka, Marta
    Wróblewska, Elwira
    Dzienisz, Alicja
    Kowalska, Małgorzata
    Sadłowski, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/778115.pdf
    Data publikacji:
    2019
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    mineral fertilizers
    controlled release
    ethylcellulose
    Opis:
    Ethylcellulose polymer was used as a coating material in the preparation of controlled release fertilizers. The materials have been prepared with the use of an immersion method. The mass ratio of polymer to fertilizer was in the range of 0.165–0.285 and the layer thickness was in the range of 204–244 μm. Mechanical properties of the prepared materials were significantly better in comparison with the initial fertilizer. Measurements of time and the degree of release of mineral components from the obtained materials were determined with a standard method. Ethylcellulose-coated materials have met the requirements of controlled release fertilizers.
    Źródło:
    Polish Journal of Chemical Technology; 2019, 21, 1; 52-58
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heat effects in the reaction of sulfuric acid with ilmenites influenced by initial temperature and acid concentration
    Autorzy:
    Jabłoński, Maciej
    Lubkowski, Krzysztof
    Tylutka, Sandra
    Ściążko, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1849318.pdf
    Data publikacji:
    2021
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    ilmenites digestion
    sulfuric acid
    enthalpy of reaction
    Opis:
    The influence of temperature and sulfuric acid concentration on the enthalpy and the rate of heat release during the reaction of Norwegian and Australian ilmenites with sulfuric acid was determined. The experimental results obtained from calorimetric measurements were compared with theoretical calculations based on the oxide composition and the phase composition of the raw material. Experimentally determined heat of reaction for Norwegian ilmenite (900–940 kJ/kg) and Australian ilmenite (800–840 kJ/kg) showed good agreement with theoretical calculations based on the phase composition of the raw material. It was found that the enthalpy of ilmenites decomposition reaction does not depend on the concentration of sulfuric acid in the concentration range from 83% to 93%. It was also demonstrated that the temperature and concentration of sulfuric acid have a significant impact on the thermokinetics of the decomposition process, increasing the value of the average rate of temperature change.
    Źródło:
    Polish Journal of Chemical Technology; 2021, 23, 3; 37-42
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of sulfur addition on the hazard-type reaction of ilmenite ores with sulfuric acid
    Autorzy:
    Jabłoński, Maciej
    Lubkowski, Krzysztof
    Tylutka, Sandra
    Ściążko, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1849314.pdf
    Data publikacji:
    2021
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    hazard-type reaction
    ilmenite
    titanium dioxide pigment
    sulfur
    Opis:
    The paper presents results of thermokinetic investigation of the hazard-type reaction of Norwegian and Australian ilmenite ores with sulfuric acid, modified by the addition of elemental sulfur, to increase the process safety in industrial conditions. In the reactions of both ilmenite ores the addition of sulfur caused a reduction of the thermal power generated in the reaction and a decrease in the value of the thermokinetic parameter ΔTmax/Δτ for almost the whole range of initial concentrations of sulfuric acid. It was also found that the addition of sulfur to the reaction did not negatively affect the degree of ilmenite leaching. The interpretation of the obtained thermokinetic curves allowed to determine safe process conditions for both types of titanium raw materials.
    Źródło:
    Polish Journal of Chemical Technology; 2021, 23, 3; 17-23
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of sulfur addition on the hazard-type reaction of ilmenite ores with sulfuric acid
    Autorzy:
    Jabłoński, Maciej
    Lubkowski, Krzysztof
    Tylutka, Sandra
    Ściążko, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/1849319.pdf
    Data publikacji:
    2021
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    hazard-type reaction
    ilmenite
    titanium dioxide pigment
    sulfur
    Opis:
    The paper presents results of thermokinetic investigation of the hazard-type reaction of Norwegian and Australian ilmenite ores with sulfuric acid, modified by the addition of elemental sulfur, to increase the process safety in industrial conditions. In the reactions of both ilmenite ores the addition of sulfur caused a reduction of the thermal power generated in the reaction and a decrease in the value of the thermokinetic parameter ΔTmax/Δτ for almost the whole range of initial concentrations of sulfuric acid. It was also found that the addition of sulfur to the reaction did not negatively affect the degree of ilmenite leaching. The interpretation of the obtained thermokinetic curves allowed to determine safe process conditions for both types of titanium raw materials.
    Źródło:
    Polish Journal of Chemical Technology; 2021, 23, 3; 17-23
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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