Influence of Biomass Chemical Properties on Torrefaction Characteristics

Different biomass types may differ with respect to torrefaction characteristics, and an improved understanding and ability to predict the torrefaction performance is, therefore, desired. In this study, the influence of the chemical properties (lignocellulose composition and alkali content) on the to...

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Main Authors:	Suriyati, Saleh, Hansen, Brian Brun, Jensen, Peter Arendt, Dam-Johansen, Kim
Format:	Article
Language:	English
Published:	American Chemical Society (ACS Publications) 2013
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/6489/ http://umpir.ump.edu.my/id/eprint/6489/ http://umpir.ump.edu.my/id/eprint/6489/ http://umpir.ump.edu.my/id/eprint/6489/1/Influence%20of%20Biomass%20Chemical%20Properties%20on%20Torrefaction%20Characteristics.pdf

id	ump-6489
recordtype	eprints
spelling	ump-64892018-05-21T06:45:46Z http://umpir.ump.edu.my/id/eprint/6489/ Influence of Biomass Chemical Properties on Torrefaction Characteristics Suriyati, Saleh Hansen, Brian Brun Jensen, Peter Arendt Dam-Johansen, Kim TP Chemical technology Different biomass types may differ with respect to torrefaction characteristics, and an improved understanding and ability to predict the torrefaction performance is, therefore, desired. In this study, the influence of the chemical properties (lignocellulose composition and alkali content) on the torrefaction behavior with respect to mass loss and grindability is investigated by simultaneous thermal analysis (STA) and by using a combined torrefaction and grinding reactor. The torrefaction behavior of six raw biomass samples and selected pretreated samples (washed and impregnated with KCl and K2CO3) has been studied. The investigated biomasses have reasonably similar carbohydrate compositions (hemicelluloses 18–25 wt % db; cellulose 38–48 wt % db; lignin 17–29 wt % db) with the exception of spruce bark, which is lower in hemicellulose content (12.9 wt % db) and cellulose content (24 wt % db), and higher in lignin content (36.8 wt % db). An increasing biomass potassium (K) content decreases the temperature of maximal conversion for both raw and alkali-impregnated biomass samples, thus decreasing the solid product yield at 270 and 300 °C. This was especially pronounced when the biomass potassium content increased from 0 to 0.2 wt %. However, the higher lignin content in bark causes a higher solid yield than what would be expected from the alkali content, illustrating that both potassium content and lignocellulose composition affect the solid yield obtained by torrefaction. The grindability of the torrefied products was evaluated by determining the d50 value of the particle size distribution of the biomass before and after torrefaction in the combined torrefaction and mill reactor. A significant decrease in d50 value was observed when the alkali content increased from 0 to 0.2 wt % db, whereas no additional effect is seen for higher potassium contents. American Chemical Society (ACS Publications) 2013 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/6489/1/Influence%20of%20Biomass%20Chemical%20Properties%20on%20Torrefaction%20Characteristics.pdf Suriyati, Saleh and Hansen, Brian Brun and Jensen, Peter Arendt and Dam-Johansen, Kim (2013) Influence of Biomass Chemical Properties on Torrefaction Characteristics. Energy & Fuels, 27 (12). pp. 7541-7548. ISSN 0887-0624 http://dx.doi.org/10.1021/ef401788m DOI: 10.1021/ef401788m
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Suriyati, Saleh Hansen, Brian Brun Jensen, Peter Arendt Dam-Johansen, Kim Influence of Biomass Chemical Properties on Torrefaction Characteristics
description	Different biomass types may differ with respect to torrefaction characteristics, and an improved understanding and ability to predict the torrefaction performance is, therefore, desired. In this study, the influence of the chemical properties (lignocellulose composition and alkali content) on the torrefaction behavior with respect to mass loss and grindability is investigated by simultaneous thermal analysis (STA) and by using a combined torrefaction and grinding reactor. The torrefaction behavior of six raw biomass samples and selected pretreated samples (washed and impregnated with KCl and K2CO3) has been studied. The investigated biomasses have reasonably similar carbohydrate compositions (hemicelluloses 18–25 wt % db; cellulose 38–48 wt % db; lignin 17–29 wt % db) with the exception of spruce bark, which is lower in hemicellulose content (12.9 wt % db) and cellulose content (24 wt % db), and higher in lignin content (36.8 wt % db). An increasing biomass potassium (K) content decreases the temperature of maximal conversion for both raw and alkali-impregnated biomass samples, thus decreasing the solid product yield at 270 and 300 °C. This was especially pronounced when the biomass potassium content increased from 0 to 0.2 wt %. However, the higher lignin content in bark causes a higher solid yield than what would be expected from the alkali content, illustrating that both potassium content and lignocellulose composition affect the solid yield obtained by torrefaction. The grindability of the torrefied products was evaluated by determining the d50 value of the particle size distribution of the biomass before and after torrefaction in the combined torrefaction and mill reactor. A significant decrease in d50 value was observed when the alkali content increased from 0 to 0.2 wt % db, whereas no additional effect is seen for higher potassium contents.
format	Article
author	Suriyati, Saleh Hansen, Brian Brun Jensen, Peter Arendt Dam-Johansen, Kim
author_facet	Suriyati, Saleh Hansen, Brian Brun Jensen, Peter Arendt Dam-Johansen, Kim
author_sort	Suriyati, Saleh
title	Influence of Biomass Chemical Properties on Torrefaction Characteristics
title_short	Influence of Biomass Chemical Properties on Torrefaction Characteristics
title_full	Influence of Biomass Chemical Properties on Torrefaction Characteristics
title_fullStr	Influence of Biomass Chemical Properties on Torrefaction Characteristics
title_full_unstemmed	Influence of Biomass Chemical Properties on Torrefaction Characteristics
title_sort	influence of biomass chemical properties on torrefaction characteristics
publisher	American Chemical Society (ACS Publications)
publishDate	2013
url	http://umpir.ump.edu.my/id/eprint/6489/ http://umpir.ump.edu.my/id/eprint/6489/ http://umpir.ump.edu.my/id/eprint/6489/ http://umpir.ump.edu.my/id/eprint/6489/1/Influence%20of%20Biomass%20Chemical%20Properties%20on%20Torrefaction%20Characteristics.pdf
first_indexed	2023-09-18T22:02:16Z
last_indexed	2023-09-18T22:02:16Z
_version_	1777414477300367360

Influence of Biomass Chemical Properties on Torrefaction Characteristics

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