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Kinetic study for the co-pyrolysis of lignocellulosic biomass and plastics using the distributed activation energy model

AuthorsNavarro López, María Victoria ; López Sebastián, José Manuel ; Veses Roda, Alberto ; Callén Romero, Mª Soledad ; García Martínez, Tomás
Issue Date20-Sep-2018
CitationEnergy - the International Journal 165 (Part.A): 731-742 (2018)
AbstractThe characteristics of bio-oil produced from biomass pyrolysis can be improved by co-feeding waste materials. In this work, co-pyrolysis of lignocellulosic biomass with six different waste plastics (waste tyre (WT), polylactic acid (PLA), polystyrene (PS), polyethylene terephthalate (PET), polypropylene (PP) and high density polyethylene (HDPE)) were conducted in a thermogravimetric analyser to study thermal decomposition of the mixtures. The distributed activation energy model (DAEM) was applied to pure feedstocks at 5 and 10 °C/min heating rates to fit the kinetic parameters. The model was used to simulate the co-pyrolysis of biomass/plastic mixtures assuming additive effect of components at different weight proportions and heating rates. Profiles of the fraction of mass remaining for mixtures at 100 °C/min were reproduced with a remarkable agreement. Discrepancies between the experimental and calculated profiles were considered as a measure of the extent of interactions occurring in the co-pyrolysis. Projections of the behaviour of mixtures under flash pyrolysis conditions were performed to study important aspects of the process, such as radical interactions and optimum working temperature
Publisher version (URL)https://doi.org/10.1016/j.energy.2018.09.133
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