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A simple expression for the apparent reaction rate of large wood char gasification with steam
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering.
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2010 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 101, no 11, 4187-4192 p.Article in journal (Refereed) Published
Abstract [en]

A simple expression for the apparent reaction rate of large wood char gasification with steam is proposed. Large char samples were gasified under steam atmosphere using a thermo-balance reactor. The apparent reaction rate was expressed as the product of the intrinsic rate and the effective factor. The effective factor was modified to include the effect of change in char diameter and intrinsic reaction rate during the reaction. Assuming uniform conversion ratio throughout a particle, the simplified reaction scheme was divided into three stages. In the initial stage, the local conversion ratio increases without particle shrinkage. In the middle stage, the particle shrinks following the shrinking core model without change in the local conversion ratio. In the final stage, the local conversion ratio increases without particle shrinkage. The validity of the modified effective value was confirmed by comparison with experimental results. (C) 2010 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2010. Vol. 101, no 11, 4187-4192 p.
Keyword [en]
Biomass gasification, Char gasification with steam, Apparent reaction rate, Effective factor
National Category
Agricultural Science Industrial Biotechnology
Identifiers
URN: urn:nbn:se:kth:diva-28415DOI: 10.1016/j.biortech.2010.01.051ISI: 000275999800056OAI: oai:DiVA.org:kth-28415DiVA: diva2:388753
Note
QC 20110118Available from: 2011-01-18 Created: 2011-01-14 Last updated: 2017-12-11Bibliographically approved

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