Microalgae pyrolysis under isothermal and non-isothermal conditions

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dc.contributor.author Cano Pleite, Eduardo
dc.contributor.author Rubio Rubio, Mariano
dc.contributor.author García Hernando, Néstor
dc.contributor.author Soria Verdugo, Antonio
dc.date.accessioned 2021-04-26T10:31:03Z
dc.date.available 2022-10-01T23:00:05Z
dc.date.issued 2020-10
dc.identifier.bibliographicCitation Cano-Pleite, E., Rubio-Rubio, M., García-Hernando, N. & Soria-Verdugo, A. (2020). Microalgae pyrolysis under isothermal and non-isothermal conditions. Algal Research, 51, 102031.
dc.identifier.issn 2211-9264
dc.identifier.uri http://hdl.handle.net/10016/32482
dc.description.abstract The present work analyzes and compares the non-isothermal and isothermal pyrolysis processes of two different kinds of microalgae: Spirulina platensis and Chlorella pyrenoidosa. The non-isothermal pyrolysis process is carried out in a Thermogravimetric Analyzer (TGA), whereas a macro-TGA bubbling fluidized bed reactor is used for the isothermal pyrolysis reaction. The simplified Distributed Activation Energy Model (DAEM) is employed to derive the kinetic parameters of the reaction in the TGA, i.e., the pre-exponential factor and the activation energy. A consecutive reaction, first-order pyrolysis model with three competitive pseudo-components for the released pyrolysis vapors is proposed to evaluate the isothermal pyrolysis experiments conducted in a macro-TGA bubbling fluidized bed. The fluidized bed experimental setup allows measuring the real-time mass evolution during the microalgae pyrolysis process, which could be used to obtain the kinetic parameters of the different reactions of which the consecutive reaction model is comprised. The activation energies of the reactions using this isothermal pyrolysis model are in good agreement, both qualitatively and quantitatively, with those obtained from the non-isothermal pyrolysis measurements run in the TGA. A quantitative comparison reveals that the TGA measurements could be employed to provide a useful first estimation of the activation energy of the isothermal pyrolysis process in the bubbling fluidized bed. Qualitatively, the Differential Thermogravimetric (DTG) curves obtained from the thermogravimetric analysis revealed the presence of three peaks in the Chlorella pyrenoidosa DTG curve and two peaks in the Spirulina platensis DTG curve, which is in agreement with the number of pseudo-component reactions in the isothermal pyrolysis model. This indicates the capability of the non-isothermal pyrolysis tests in a TGA to predict the number of reactions required to characterize the isothermal pyrolysis process.
dc.format.extent 11
dc.language.iso eng
dc.publisher Elsevier
dc.rights © 2020 Elsevier B.V.
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subject.other Chlorella pyrenoidosa
dc.subject.other Spirulina platensis
dc.subject.other Fluidized bed
dc.subject.other Microalgae
dc.subject.other Pyrolysis kinetics
dc.subject.other Thermogravimetric analysis
dc.title Microalgae pyrolysis under isothermal and non-isothermal conditions
dc.type article
dc.subject.eciencia Energías Renovables
dc.identifier.doi https://doi.org/10.1016/j.algal.2020.102031
dc.rights.accessRights openAccess
dc.relation.projectID Comunidad de Madrid. 2019-T2/AMB-15938
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 1
dc.identifier.publicationissue 102031
dc.identifier.publicationlastpage 11
dc.identifier.publicationtitle Algal Research
dc.identifier.publicationvolume 51
dc.identifier.uxxi AR/0000027105
dc.contributor.funder Comunidad de Madrid
dc.affiliation.dpto UC3M. Departamento de Ingeniería Térmica y de Fluidos
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Tecnologías Apropiadas para el Desarrollo Sostenible
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Ingeniería de Sistemas Energéticos
dc.affiliation.grupoinv UC3M. Grupo de Investigación: Mecánica de Fluido
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