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Thermodynamic Analysis of Digestate Pyrolysis Coupled with CO2 Sorption

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Computational Science and Its Applications – ICCSA 2023 Workshops (ICCSA 2023)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 14111))

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Abstract

To date the management of digestate is a crucial task for anaerobic digestion process. In the present work a strategy for digestate management is thermodynamically analyzed by a commercial software for process simulation called CHEMCAD®. Pyrolysis of digestate is simulated by a minimization of the free Gibbs energy. The sequestration of the carbon dioxide (CO2) released by the pyrolysis is investigated by the addition of calcium oxide, in order to reduce CO2 emissions. The effect of the pyrolysis temperature between 400–900 ℃ and of the CaO/digestate mass ratio between 0–0.5 was discussed, as well. The CHEMCAD application allowed to investigate the chemisorption behaviour by focusing on the temperature-dependent CO2 sorption trends in relation to different values of the CaO mass ratio. Temperature below 650 ℃ should be considered for CO2 sorption by CaO. CO2 molar fraction below 10% was obtained for temperature below 450 ℃ and CaO/digestate mass ratio higher than 0.4.

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Authors and Affiliations

  1. Earth- and Eco-Systems Expertise for Environmental Modelling and Restoration Company - EESEEMR, Synergy Centre ITT Dublin, TU Dublin-Tallaght Campus, Dublin 24, Dublin, 24 A386, Ireland

    Antonella Dimotta

  2. Laboratory of Thermochemical Processes for Waste and Biomass Valorization National, ENEA Research Centre, SS Jonica 106 km 419+500, 75026, Rotondella, Trisaia (MT), Italy

    Cesare Freda

Authors
  1. Antonella Dimotta
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  2. Cesare Freda
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Correspondence to Antonella Dimotta .

Editor information

Editors and Affiliations

  1. University of Perugia, Perugia, Italy

    Osvaldo Gervasi

  2. University of Basilicata, Potenza, Italy

    Beniamino Murgante

  3. University of Minho, Braga, Portugal

    Ana Maria A. C. Rocha

  4. University of Cagliari, Cagliari, Italy

    Chiara Garau

  5. University of Basilicata, Potenza, Italy

    Francesco Scorza

  6. University of Massachusetts Medical School, Worcester, MA, USA

    Yeliz Karaca

  7. Polytechnic University of Bari, Bari, Italy

    Carmelo M. Torre

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Dimotta, A., Freda, C. (2023). Thermodynamic Analysis of Digestate Pyrolysis Coupled with CO2 Sorption. In: Gervasi, O., et al. Computational Science and Its Applications – ICCSA 2023 Workshops. ICCSA 2023. Lecture Notes in Computer Science, vol 14111. Springer, Cham. https://doi.org/10.1007/978-3-031-37126-4_11

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  • DOI: https://doi.org/10.1007/978-3-031-37126-4_11

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-031-37125-7

  • Online ISBN: 978-3-031-37126-4

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