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CO2 Gasification Kinetics of Algal and Woody Char Procured under Different Pyrolysis Conditions and Heating Rates
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-8235-9839
Department of Chemical Engineering, Monash University.
2015 (English)In: A C S Sustainable Chemistry & Engineering, ISSN 2168-0485, Vol. 3, no 2, p. 365-373Article in journal (Refereed) Published
Abstract [en]

This paper presents the results on gasification kinetic data, influence of the different models on predicted gasification rates, reaction order and comparison of gasification reactivity of the chars prepared in different conditions as well as that among the feedstock (algal and woody chars). A fresh water alga, Chlorococcum humicola and three types of woody biomass were pyrolyzed separately in a thermogravimetric analyzer (TGA) and in an entrained flow reactor (EFR), and the resultant chars were then gasified in the temperature range 700–1000 °C under CO2 to compare their intrinsic kinetics and to determine the transition temperatures between kinetic control and intraparticle diffusion control. The transition temperature was dependent on both sample and pyrolysis condition. Activation energy and frequency factor were determined using three kinetic models (volumetric, grain and random pore). The activation energy of different chars was determined to be in the range of 180–307 kJ/mol. Among the models, the random pore model was found to be predicting the weight loss profile most accurately except for the algal and a woody char from EFR. The reaction order and reactivity were found to be varying significantly with the pyrolysis condition of the chars.

Place, publisher, year, edition, pages
2015. Vol. 3, no 2, p. 365-373
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-2847DOI: 10.1021/sc500777uISI: 000348894000021Scopus ID: 2-s2.0-84922146556Local ID: 08fbb818-ee42-4acb-b81a-7b6f8e841f81OAI: oai:DiVA.org:ltu-2847DiVA, id: diva2:975701
Note
Validerad; 2015; Nivå 2; 20150120 (kawkir)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Kirtania, Kawnish

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CiteExportLink to record
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