Pyrolysis kinetics of biomass wastes using isoconversional methods and the distributed activation energy model

Cindy Natalia Arenas, María Victoria Navarro, Juan Daniel Martínez

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    68 Scopus citations

    Abstract

    In this work, a thermogravimetric analyser was used to assess the pyrolysis kinetics of pineapple, orange and mango peel wastes and agro-industrial by-products, rice husk and pine wood. Five isoconversional methods (KAS, FWO, Starink, Vyazovkin and Friedman) and one model-fitting method (DAEM) accurately fitted the experimental data at three heating rates (5, 10 and 20 °C/min) between 10% and 90% conversion. These methods agree with the trends shown by the activation energy (Ea) distribution calculated, with fluctuations between 150 and 550 kJ/mol. The fluctuations of Ea in the whole range of conversion, in addition to a higher number of relevant reactions obtained by DAEM for fruit peel samples compared to agro-industrial samples, are associated with a higher extractive content in the peels. Kinetic parameters fitted by DAEM were successfully verified at the highest heating rate studied.

    Original languageEnglish
    Article number121485
    JournalBioresource Technology
    Volume288
    DOIs
    StatePublished - Sep 2019

    Bibliographical note

    Funding Information:
    The authors would like to express all their gratitude to COLCIENCIAS and CIDI-UPB for the financial support given by the projects 1210-715-51742 and 387C-11/18-24, respectively. We are also grateful to GIMEL group from UdeA for making the TGA device available to us, and to the GRAIN group from UPB for their support in extractives quantification. In addition, the authors would like to thank MINECO and FEDER for their financial support (Project ENE2015-68320-R) and the Regional Government of Aragon (DGA) for the support provided under their research groups support programme.

    Publisher Copyright:
    © 2019 Elsevier Ltd

    Keywords

    • Biomass
    • Isoconversional methods
    • Kinetic models
    • Pyrolysis
    • Thermogravimetric analysis

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