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Experimental Study of Absorbent Hygiene Product Devolatilization in a Bubbling Fluidized Bed

Author

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  • Barbara Malsegna

    (Department of Industrial and Information Engineering and Economics (DIIIE), University of L’Aquila, Piazzale E. Pontieri 1-loc. Monteluco di Roio, 67100 L’Aquila, Italy)

  • Andrea Di Giuliano

    (Department of Industrial and Information Engineering and Economics (DIIIE), University of L’Aquila, Piazzale E. Pontieri 1-loc. Monteluco di Roio, 67100 L’Aquila, Italy)

  • Katia Gallucci

    (Department of Industrial and Information Engineering and Economics (DIIIE), University of L’Aquila, Piazzale E. Pontieri 1-loc. Monteluco di Roio, 67100 L’Aquila, Italy)

Abstract

This paper aims to investigate the usage of waste from Absorbent Hygienic Products (AHP) as a fuel for gasification or pyrolysis, two attractive routes to obtain valuable products and dispose of this kind of waste. The study experimentally investigated the devolatilization of coarsely shredded materials from diapers, in a laboratory-scale bubbling fluidized bed made of sand, as a representative preparatory step of the above-mentioned thermochemical conversions. Two versions of shredded materials were considered: as-manufactured diapers (AHPam, as a reference), and the cellulosic fraction of sterilized used diapers (AHPus). Results were presented, obtained from physical-chemical characterization of AHPam and AHPus (TGA, CHNS/O, proximate and ultimate analyses, XRF, ICP-AES, SEM-EDS), as well as from their devolatilizations at 500–600–700–800 °C under two different atmospheres (air plus nitrogen, or pure nitrogen as a reference). Generally, temperature influenced syngas composition the most, with better performances under pure nitrogen. At 700–800 °C under pure nitrogen, the highest syngas quality and yield were obtained. For AHPam and AHPus, respectively: (i) H 2 equaled 29.5 vol% and 23.7 vol%, while hydrocarbons equaled 14.8 vol% and 7.4 vol% on dry, dilution-free basis; (ii) 53.7 Nl and 46.0 Nl of syngas were produced, per 100 g of fuel. Overall, AHP emerged as an interesting fuel for thermochemical conversions.

Suggested Citation

  • Barbara Malsegna & Andrea Di Giuliano & Katia Gallucci, 2021. "Experimental Study of Absorbent Hygiene Product Devolatilization in a Bubbling Fluidized Bed," Energies, MDPI, vol. 14(9), pages 1-21, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:9:p:2399-:d:541939
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    References listed on IDEAS

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    1. Andrea Di Giuliano & Stefania Lucantonio & Katia Gallucci, 2021. "Devolatilization of Residual Biomasses for Chemical Looping Gasification in Fluidized Beds Made Up of Oxygen-Carriers," Energies, MDPI, vol. 14(2), pages 1-16, January.
    2. John Bongaarts, 2016. "Development: Slow down population growth," Nature, Nature, vol. 530(7591), pages 409-412, February.
    3. Asiphile Khanyile & Guy C. Caws & S’phumelele L. Nkomo & Ntandoyenkosi M. Mkhize, 2020. "Characterisation Study of Various Disposable Diaper Brands," Sustainability, MDPI, vol. 12(24), pages 1-18, December.
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    1. Rachele Foffi & Elisa Savuto & Matteo Stante & Roberta Mancini & Katia Gallucci, 2022. "Study of Energy Valorization of Disposable Masks via Thermochemical Processes: Devolatilization Tests and Simulation Approach," Energies, MDPI, vol. 15(6), pages 1-24, March.
    2. Chu, Chu & Wang, Ping & Boré, Abdoulaye & Ma, Wenchao & Chen, Guanyi & Wang, Pan, 2023. "Thermal plasma co-gasification of polyvinylchloride and biomass mixtures under steam atmospheres: Gasification characteristics and chlorine release behavior," Energy, Elsevier, vol. 262(PB).
    3. Armando Vitale & Alessandro Antonio Papa & Stefano Iannello & Erwin Ciro & Arda Hatunoglu & Valerio Corradetti & Nicola Rovelli & Pier Ugo Foscolo & Andrea Di Carlo, 2023. "Devolatilization of Polypropylene Particles in Fluidized Bed," Energies, MDPI, vol. 16(17), pages 1-20, August.
    4. Armando Vitale & Andrea Di Carlo & Pier Ugo Foscolo & Alessandro Antonio Papa, 2024. "Kinetic Model Implementation of Fluidized Bed Devolatilization," Energies, MDPI, vol. 17(13), pages 1-17, June.

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