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Modeling of slow pyrolysis of various biomass feedstock in a rotary drum using TGA data
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering.ORCID iD: 0000-0002-1881-2686
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering.ORCID iD: 0000-0001-7995-3151
2018 (English)In: Chemical Engineering and Processing, ISSN 0255-2701, E-ISSN 1873-3204, Vol. 129, p. 95-102Article in journal (Refereed) Published
Abstract [en]

Design and optimization of biomass gasification faces the challenge of feedstock variation. Specifically, design calculations require kinetic rate expressions for the given feedstock, whose rigorous determination is demanding and often exceeds available recourses in an early development stage. In this work, we model the slow pyrolysis of biomass for the production of biochar. The aim is to predict the conversion of raw biomass to biochar as a function of the process conditions. Here, we will show that TGA data processed with an isoconversional method is enough to obtain an effective rate expression which allows for predicting the behavior of the biomass at an arbitrary temperature evolution. Such rate expressions can then be used in the process model to simulate conversion of raw biomass to biochar. To illustrate the feasibility of this approach we consider four vastly different biomass, namely spruce wood, pulp, lignin and xylan–lignin, undergoing slow pyrolysis in an indirectly heated rotary kiln reactor. The results of our modeling are compared to experimental data obtained from a 500 kW pilot plant pyrolyzer and to a more detailed process model.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 129, p. 95-102
Keywords [en]
Biomass pyrolysis, Isoconversional, Process model, Rotary drum
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-228722DOI: 10.1016/j.cep.2018.05.002ISI: 000435059000012Scopus ID: 2-s2.0-85047165839OAI: oai:DiVA.org:kth-228722DiVA, id: diva2:1210996
Funder
Swedish Energy Agency
Note

QC 20180530

Available from: 2018-05-30 Created: 2018-05-30 Last updated: 2018-07-02Bibliographically approved

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Sadegh-Vaziri, RamiarBäbler, Matthäus

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