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dc.contributor.authorWang, Liang
dc.contributor.authorLi, Tian
dc.contributor.authorVárhegyi, Gábor
dc.contributor.authorSkreiberg, Øyvind
dc.contributor.authorLøvås, Terese
dc.date.accessioned2018-02-20T09:37:05Z
dc.date.available2018-02-20T09:37:05Z
dc.date.created2017-12-13T12:23:56Z
dc.date.issued2017
dc.identifier.citationEnergy & Fuels. 2017, 32 (1), 588-597.nb_NO
dc.identifier.issn0887-0624
dc.identifier.urihttp://hdl.handle.net/11250/2485846
dc.description.abstractThe CO2 gasification of chars was investigated by thermogravimetric analysis (TGA). The chars were prepared from spruce and its forest residue. Prior to the gasification, the raw materials were pelletized and pulverized. Part of the samples was directly gasified in the TGA when the char was formed at low heating rates before the gasification. Another sort of char was prepared in a drop-tube reactor (DTR) at a heating rate of around 1 × 104 °C/s and a residence time of 0.2 s at 1200 °C. The kinetic evaluation was based on TGA experiments with linear, modulated, and constant-reaction rate (CRR) temperature programs. The gasification of the DTR chars took place at temperatures 80–100 °C lower than the chars formed at low heating rates. The chars formed at low heating rates exhibited a side reaction that occurred 80–100 °C below the main peak of the mass-loss rate curves during the gasification. Accordingly the gasification kinetics of these chars was described by assuming two pseudocomponents. The thermal annealing (thermal deactivation) of the chars during the gasification experiments was taken into account by the pre-exponential factors, which were allowed to have different values at different temperature programs. A strong compensation effect was observed between the activation energy (E) and the rest of the kinetic parameters. Nevertheless, the obtained E values varied in a narrow interval (from 219 until 227 kJ/mol) and were very close to the ones obtained for other chars with similar kinetic evaluation procedures (Wang et al., Energy & Fuels 2013, 27, 6098−6107 and Wang et al., Energy & Fuels 2014, 28, 7582–7590).nb_NO
dc.language.isoengnb_NO
dc.publisherAmerican Chemical Societynb_NO
dc.titleCO2 Gasification of Chars Prepared by Fast and Slow Pyrolysis from Wood and Forest Residue: A Kinetic Studynb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.pagenumber588-597nb_NO
dc.source.volume32nb_NO
dc.source.journalEnergy & Fuelsnb_NO
dc.source.issue1nb_NO
dc.identifier.doi10.1021/acs.energyfuels.7b03333
dc.identifier.cristin1526739
dc.relation.projectNorges forskningsråd: 228726nb_NO
dc.description.localcodeThis is a post-peer-review, pre-copyedit version of an article published in [Energy Fuels]. Locked until 12.12.2018 due to copyright restrictions. The final authenticated version is available online at: https://pubs.acs.org/doi/10.1021/acs.energyfuels.7b03333nb_NO
cristin.unitcode194,64,25,0
cristin.unitnameInstitutt for energi- og prosessteknikk
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode2


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