Przeglądaj wg Autor "Kapica-Kozar, Joanna"

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    CO2 Sorbents Based on Spherical Carbon and Photoactive Metal Oxides: Insight into Adsorption Capacity, Selectivity and Regenerability
    (MDPI, 2022-10-11) Pełech, Iwona; Kusiak-Nejman, Ewelina; Staciwa, Piotr; Sibera, Daniel; Kapica-Kozar, Joanna; Wanag, Agnieszka; Latzke, Filip; Pawłowska, Karolina; Michalska, Adrianna; Narkiewicz, Urszula; Morawski, Antoni W.; Zachodniopomorski Uniwersytet Technologiczny w Szczecinie
    This work aimed to obtain hybrid composites based on photoactive metal oxide and carbon having adsorption properties. The materials, composed of titanium dioxide or zinc oxide and spherical carbon, were obtained from resorcinol-formaldehyde resin, treated in a solvothermal reactor heated with microwaves and then subjected to carbonization, were received. The functional groups of pure carbon spheres (unsaturated stretching C=C, stretching C-OH and C-H bending vibrations), CS/ZnO and CS/TiO2 samples were determined by FT-IR analysis. The characteristic bands for ZnO and TiO2 were observed below 1000 cm(-1). The thermal oxidative properties are similar for TiO2- and ZnO-modified carbon spheres. We have observed that the increased carbon sphere content in nanocomposites results in starting the decomposition process at a lower temperature, therefore, nanocomposites have a broader combustion temperature range. The effect of the oxides' addition to carbon spheres on their adsorption properties was evaluated in detail by examining CO2 adsorption from the gas phase. The selectivity of CO2 over N-2 at a temperature of 25 degrees C and pressure of 1 bar (a novelty in testing CS-based sorbents) calculated for 3.00 CS/TiO2 and 4.00 CS/ZnO was 15.09 and 16.95, respectively. These nanocomposites exhibit excellent cyclic stability checked over 10 consecutive adsorption-desorption cycles.
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    The Effect of the Modification of Carbon Spheres with ZnCl2 on the Adsorption Properties towards CO2
    (MDPI, 2022-02) Pełech, Iwona; Staciwa, Piotr; Sibera, Daniel; Kusiak-Nejman, Ewelina; Morawski, Antoni W.; Kapica-Kozar, Joanna; Narkiewicz, Urszula; Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin; Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin; Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Department of General Civil Engineering, Faculty of Civil and Environmental Engineering, West Pomeranian University of Technology in Szczecin; Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin; Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin; Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin; Department of Inorganic Chemical Technology and Environment Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin
    Zinc chloride and potassium oxalate are often applied as activating agents for carbon materials. In this work, we present the preparation of ZnO/carbon spheres composites using resorcinol-formaldehyde resin as a carbon source in a solvothermal reactor heated with microwaves. Zinc chloride as a zinc oxide source and potassium oxalate as an activating agent were applied. The effect of their addition and preparation conditions on the adsorption properties towards carbon dioxide at 0 degrees C and 25 degrees C were investigated. Additionally, for all tested sorbents, the CO2 sorption tests at 40 degrees C, carried out utilizing a thermobalance, confirmed the trend of sorption capacity measured at 0 and 25 degrees C. Furthermore, the sample activated using potassium oxalate and modified using zinc chloride (a carbon-to-zinc ratio equal to 10:1) displayed not only a high CO2 adsorption capacity (2.69 mmol CO2/g at 40 degrees C) but also exhibited a stable performance during the consecutive multicycle adsorption-desorption process.
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    The influence of the addition of carbon spheres on photoactivity of TiO2 and ZnO in CO2 reduction process
    (Elsevier, 2023-09-09) Morawski, Antoni W.; Ćmielewska, Katarzyna; Kusiak-Nejman, Ewelina; Staciwa, Piotr; Kapica-Kozar, Joanna; Ekiert, Ewa; Pełech, Iwona; Narkiewicz, Urszula; Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydział Technologii i Inżynierii Chemicznej. Katedra Technologii Chemicznej Nieorganicznej i Inżynierii Środowiska; West Pomeranian University of Technology in Szczecin. Faculty of Chemical Technology and Engineering. Department of Inorganic Chemical Technology and Environment Engineering
    The development of an effective photocatalyst for CO2 reduction is currently being addressed by many scientists. This study concerns the influence of the addition of carbon spheres (CS) on photoactivity of TiO2 and ZnO. The photocatalysts were tested in a liquid phase system in an alkaline environment. The suspensions of the tested materials were irradiated with UV–Vis light for 6 h. Then, the amount of the obtained products in the gas phase was analysed by gas chromatography. The identified products of CO2 photoreduction were hydrogen, carbon monoxide, and methane. Based on the results, it was found that CS/TiO2 and CS/ZnO showed similar activity in carbon dioxide reduction processes, however, more product amounts were obtained in experiments with the use of CS/TiO2 materials. The addition of carbon spheres to titanium dioxide improved its activity in carbon monoxide production. The maximum photoactivity of CS/TiO2 was observed for the addition of 0.1 g of CS. On the other hand, in the case of CS/ZnO materials, carbon spheres did not positively affect their performance. Nevertheless, their activity increased with the CS amount.
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    New Insight on Carbon Dioxide-Mediated Hydrogen Production
    (Chemistry Europe, European Chemical Societies Publishing, 2022-04-03) Morawski, Antoni W.; Kusiak-Nejman, Ewelina; Pełech, Iwona; Cmielewska, Katarzyna; Sibera, Daniel; Staciwa, Piotr; Wanag, Agnieszka; Gano, Marcin; Ekiert, Ewa; Kapica-Kozar, Joanna; Witkowski, Kordian; Narkiewicz, Urszula; Zachodniopomorski Uniwersytet Technologiczny w Szczecinie
    A new approach to hydrogen production from water is described. This simple method is based on carbon dioxide-mediated water decomposition under UV radiation. The water contained dissolved sodium hydroxide, and the solution was saturated with gaseous carbon dioxide. During saturation, the pH decreased from about 11.5 to 7-8. The formed bicarbonate and carbonate ions acted as scavengers for hydroxyl radicals, preventing the recombination of hydroxyl and hydrogen radicals and prioritizing hydrogen gas formation. In the presented method, not yet reported in the literature, hydrogen production is combined with carbon dioxide. For the best system with alkaline water (0.2 m NaOH) saturated with CO2 under UV-C, the hydrogen production amounted to 0.6 mu mol h(-1) during 24 h of radiation.
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    On the Selectivity of Simultaneous CO2 and N2 Reduction Using TiO2/Carbon Sphere Photocatalysts Prepared by Microwave Treatment and Mounted on Silica Cloth
    (MDPI, 2023-08-24) Kusiak-Nejman, Ewelina; Ćmielewska, Katarzytna; Pełech, Iwona; Ekiert, Ewa; Staciwa, Piotr; Sibera, Daniel; Wanag, Agnieszka; Kapica-Kozar, Joanna; Gano, Marcin; Narkiewicz, Urszula; Morawski, Antoni Waldemar; Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydział Budownictwa i Inżynierii Środowiska. Katedra Budownictwa Ogólnego; Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydział Technologii i Inżynierii Chemicznej. Katedra Technologii Chemicznej Nieorganicznej i Inżynierii Środowiska; Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydział Technologii i Inżynierii Chemicznej. Katedra Technologii Chemicznej Organicznej i Materiałów Polimerowych; West Pomeranian University of Technology in Szczecin. Faculty of Chemical Technology and Engineering. Department of Inorganic Chemical Technology and Environment Engineering; West Pomeranian University of Technology in Szczecin. Faculty of Civil and Environmental Engineering. Department of General Civil Engineering; West Pomeranian University of Technology in Szczecin. Faculty of Chemical Technology and Engineering. Department of Chemical Organic Technology and Polymeric Materials
    This paper presents new photocatalysts obtained by treating carbon spheres (CS) and TiO2 in a microwave reactor at a pressure of 20 atm and a temperature of up to 300 °C for 15 min and then depositing TiO2/CS composites on glass fibre cloths. Such highly CO2-adsorbing photocatalysts showed photoactivity in the simultaneous water-splitting process, generating H2, reducing CO2 to CO and CH4, and reducing N2 to NH3. In addition, calculations of the hydrogen balance involved in all reactions were performed. Adding 1 g of carbon spheres per 1 g of TiO2 maintained the high selectivity of nitrogen fixation at 95.87–99.5%, which was continuously removed from the gas phase into the water as NH4+ ions.
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    Postępy w technologii i inżynierii chemicznej 2023: praca zbiorowa pod redakcją Zofii Lendzion-Bieluń i Dariusza Moszyńskiego
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2023) Barańska, Julia; Konopka, Piotr; Koroniak-Szejn, Katarzyna; Zabiszak, Michał; Jastrząb, Renata; Czerwonko, Wojciech; Dzienisz, Alicja; Lubkowski, Krzysztof; Wróblewska, Elwira; Piz, Mateusz; Kunicka, Klaudia Maria; Derkowska, Monika; Kłaniecki, Konrad Józef; Rzemieniecki, Tomasz; Kaczmarek, Damian Krystian; Kraśkiewicz, Agata; Kowalczyk, Agnieszka; Litwicka, Natalia; Irzmańska, Emilia; Ściążko, Andrzej; Majewska, Kleopatra; Story, Anna; Niemczak, Michał; Stachowiak, Witold; Olejniczak, Adriana; Klejdysz, Tomasz; Jarzyna, Paulina; Podolak, Natalia; Janus, Ewa; Prochowska, Marta; Kusiak-Nejman, Ewelina; Kapica-Kozar, Joanna; Ekiert, Ewa; Pełech, Iwona; Morawski, Antoni Waldemar; Narkiewicz, Urszula; Serafin, Julia; Tomala, Oliwia; Kucharski, Łukasz; Nowak, Anna; Klimowicz, Adam; Weisbrodt, Mateusz; Schmidt, Beata; Woźniak, Piotr; Gryta, Marek; Lendzion-Bieluń, Zofia; Moszyński, Dariusz; Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydział Technologii i Inżynierii Chemicznej; Polskie Towarzystwo Chemiczne
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    VIII Szczecińskie Sympozjum Młodych Chemików. Praca zbiorowa pod redakcją Elwiry K. Wróblewskiej i Łukasza Struka
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2023) Ambroziak, Barbara; Bosacka, Monika; Barańska, Julia; Konopka, Piotr; Koroniak, Katarzyna; Jastrząb, Renata; Bołt, Małgorzata; Mermela, Aleksandra; Hanek, Kamil; Żak, Patrycja; Dubrowska, Kamila; Jurkiewicz, Martyna; Jabłońska, Joanna; Paszkiewicz, Oliwia; Augustyniak, Adrian; Pełech, Robert; Rakoczy, Rafał; Dzienisz, Alicja; Lubkowski, Krzysztof; Wróblewska, Elwira; Grzegorczyk, Kacper; Murasiewcz, Halina; Hryb, Maria; Pełech, Iwona; Olejniczak, Adrianna; Wojcieszak, Marta; Niemczak, Michał; Kaczmarek, Damian K.; Koroniak-Szejn, Katarzyna; Zabiszak, Michał; Kowalska, Karolina; Kuwik, Marta; Pisarska, Joanna; Pisarski, Wojciech A.; Kowalczyk, Agnieszka; Litwicka, Natalia; Irzmańska, Emilia; Lubowicz, Magdalena M.; Idzik, Tomasz J.; Sośnicki, Jacek G.; Majewska, Kleopatra; Story, Anna; Stachowiak, Witold; Kaczmarek, Damian Krystian; Klejdysz, Tomasz; Rzemieniecki, Tomasz; Kordas, Marian; Pietrusewicz, Karolina; Podolak, Natalia; Janus, Ewa; Prochowska, Natalia; Kusiak-Nejman, Ewelina; Kapica-Kozar, Joanna; Ekiert, Ewa; Morawski, Antoni W.; Narkiewicz, Urszula; Serafin, Julia; Tomala, Oliwia; Kucharski, Łukasz; Klimowicz, Adam; Sroka, Weronika; Nowacka, Aleksandra; Szymańska, Julia; Rachwalski, Michał; Pieczonka, Adam Marek; Ściążko, Andrzej; Świętczak, Eliza; Tkaczyk, Patrycja; Weisbrodt, Mateusz; Syguda, Anna; Przybył, Patrycja; Materna, Katarzyna; Woźniak, Piotr; Gryta, Marek; Piz, Mateusz; Kraśkiewicz, Agata; Jabłoński, Maciej; Markowska-Szczupak, Agata; Snopek, Klaudia; Czerwonko, Wojciech; Wróblewska, Elwira K. redaktor; Struk, Łukasz redaktor
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    ZnO/Carbon Spheres with Excellent Regenerability for Post-Combustion CO2 Capture
    (MDPI, 2021-10-28) Pełech, Iwona; Sibera, Daniel; Staciwa, Piotr; Kusiak-Nejman, Ewelina; Kapica-Kozar, Joanna; Wanag, Agnieszka; Narkiewicz, Urszula; Morawski, Antoni W.; Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydział Technologii i Inżynierii Chemicznej. Katedra Technologii Chemicznej Nieorganicznej i Inżynierii Środowiska; Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydział Budownictwa i Inżynierii Środowiska. Katedra Budownictwa Ogólnego; West Pomeranian University of Technology in Szczecin. Faculty of Chemical Technology and Engineering. Department of Inorganic Chemical Technology and Environment Engineering; West Pomeranian University of Technology in Szczecin. Faculty of Civil and Environmental Engineering. Department of General Civil Engineering
    This paper examines the synthesis of the ZnO/carbon spheres composites using resorcinol—formaldehyde resin as a carbon source and zinc nitrate as a zinc oxide source in a solvothermal reactor heated with microwaves. The influence of activation with potassium oxalate and modification with zinc nitrate on the physicochemical properties of the obtained materials and CO2 adsorption capacity was investigated. It was found that in the case of nonactivated material as well as activated materials, the presence of zinc oxide in the carbon matrix had no effect or slightly increased the values of CO2 adsorption capacity. Only for the material where the weight ratio of carbon:zinc was 2:1, the decrease of CO2 adsorption capacity was reported. Additionally, CO2 adsorption experiments on nonactivated carbon spheres and those activated with potassium oxalate with different amounts of zinc nitrate were carried out at 40 °C using thermobalance. The highest CO2 adsorption capacity at temperature 40 °C (2.08 mmol/g adsorbent) was achieved for the material after activation with potassium oxalate with the highest zinc nitrate content as ZnO precursor. Moreover, repeated adsorption/desorption cycle experiments revealed that the as-prepared carbon spheres were very good CO2 adsorbents, exhibiting excellent cyclic stability with a performance decay of less than 10% over up to 25 adsorption-desorption cycles.