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Possibility of Advanced Modified-Silica-Based Porous Materials Utilisation in Water Adsorption Processes—A Comparative Study

Author

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  • Karol Sztekler

    (Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland)

  • Agata Mlonka-Mędrala

    (Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland)

  • Nezar H. Khdary

    (King Abdulaziz City for Science and Technology, Riyadh 11442, Saudi Arabia)

  • Wojciech Kalawa

    (Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland)

  • Wojciech Nowak

    (Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland)

  • Łukasz Mika

    (Faculty of Energy and Fuels, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland)

Abstract

Due to a high risk of power outages, a heat-driven adsorption chillers are gaining the attention. To increase the efficiency of the chiller, new adsorbents must be produced and examined. In this study, four newly developed silica–based porous materials were tested and compared with silica gel, an adsorber commonly paired with water. Extended sorption tests using mercury intrusion porosimetry, gas adsorption, and dynamic vapor sorption were performed. The morphology of the samples was determined using a scanning electron microscope. The thermal properties were defined using simultaneous thermal analysis and a laser flash method. Metal organic silica (MOS) nanocomposites analysed in this study had thermal properties similar to those of commonly used silica gel. MOS samples have a thermal diffusivity coefficient in the range of 0.17–0.25 mm 2 /s, whereas silica gel of about 0.2 mm 2 /s. The highest water adsorption capacity was measured for AFSMo-Cu and equal to 33–35%. For narrow porous silica gel mass uptake was equal about 25%. In the case of water adsorption, it was observed that the pore size of the sorbent is essential, and adsorbents with pore sizes higher than 5 nm, are most recommended in working pairs with water.

Suggested Citation

  • Karol Sztekler & Agata Mlonka-Mędrala & Nezar H. Khdary & Wojciech Kalawa & Wojciech Nowak & Łukasz Mika, 2022. "Possibility of Advanced Modified-Silica-Based Porous Materials Utilisation in Water Adsorption Processes—A Comparative Study," Energies, MDPI, vol. 15(1), pages 1-15, January.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:1:p:368-:d:718007
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    References listed on IDEAS

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    1. Karol Sztekler & Wojciech Kalawa & Łukasz Mika & Agata Mlonka-Medrala & Marcin Sowa & Wojciech Nowak, 2021. "Effect of Additives on the Sorption Kinetics of a Silica Gel Bed in Adsorption Chiller," Energies, MDPI, vol. 14(4), pages 1-13, February.
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    Cited by:

    1. Marcin Sosnowski & Jaroslaw Krzywanski & Norbert Skoczylas, 2022. "Adsorption Desalination and Cooling Systems: Advances in Design, Modeling and Performance," Energies, MDPI, vol. 15(11), pages 1-6, May.
    2. Ahmed S. Alsaman & Ahmed A. Hassan & Ehab S. Ali & Ramy H. Mohammed & Alaa E. Zohir & Ayman M. Farid & Ayman M. Zakaria Eraqi & Hamdy H. El-Ghetany & Ahmed A. Askalany, 2022. "Hybrid Solar-Driven Desalination/Cooling Systems: Current Situation and Future Trend," Energies, MDPI, vol. 15(21), pages 1-25, October.
    3. Małgorzata Sieradzka & Agata Mlonka-Mędrala & Izabela Kalemba-Rec & Markus Reinmöller & Felix Küster & Wojciech Kalawa & Aneta Magdziarz, 2022. "Evaluation of Physical and Chemical Properties of Residue from Gasification of Biomass Wastes," Energies, MDPI, vol. 15(10), pages 1-19, May.

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