Changes of chemical and mechanical behavior of torrefied wheat straw

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Standard

Changes of chemical and mechanical behavior of torrefied wheat straw. / Shang, Lei; Ahrenfeldt, Jesper; Holm, Jens Kai; Sanadi, Anand Ramesh; Barsberg, Søren Talbro; Thomsen, Tobias; Stelte, Wolfgang; Henriksen, Ulrik B.

In: Biomass & Bioenergy, Vol. 40, 2012, p. 63-70.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Harvard

APA

CBE

MLA

Vancouver

Author

Shang, Lei; Ahrenfeldt, Jesper; Holm, Jens Kai; Sanadi, Anand Ramesh; Barsberg, Søren Talbro; Thomsen, Tobias; Stelte, Wolfgang; Henriksen, Ulrik B. / Changes of chemical and mechanical behavior of torrefied wheat straw.

In: Biomass & Bioenergy, Vol. 40, 2012, p. 63-70.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{52fca7dd88ef45dfb677ae7b5fc6d6de,
title = "Changes of chemical and mechanical behavior of torrefied wheat straw",
keywords = "Torrefaction, Grindability, Tensile strength, Hardgrove, ATR-FTIR, Triticum aestivum L",
publisher = "Pergamon",
author = "Lei Shang and Jesper Ahrenfeldt and Holm, {Jens Kai} and Sanadi, {Anand Ramesh} and Barsberg, {Søren Talbro} and Tobias Thomsen and Wolfgang Stelte and Henriksen, {Ulrik B.}",
year = "2012",
doi = "10.1016/j.biombioe.2012.01.049",
volume = "40",
pages = "63--70",
journal = "Biomass & Bioenergy",
issn = "0961-9534",

}

RIS

TY - JOUR

T1 - Changes of chemical and mechanical behavior of torrefied wheat straw

A1 - Shang,Lei

A1 - Ahrenfeldt,Jesper

A1 - Holm,Jens Kai

A1 - Sanadi,Anand Ramesh

A1 - Barsberg,Søren Talbro

A1 - Thomsen,Tobias

A1 - Stelte,Wolfgang

A1 - Henriksen,Ulrik B.

AU - Shang,Lei

AU - Ahrenfeldt,Jesper

AU - Holm,Jens Kai

AU - Sanadi,Anand Ramesh

AU - Barsberg,Søren Talbro

AU - Thomsen,Tobias

AU - Stelte,Wolfgang

AU - Henriksen,Ulrik B.

PB - Pergamon

PY - 2012

Y1 - 2012

N2 - The purpose of the study was to investigate the influence of torrefaction on the grindability of wheat straw. Straw samples were torrefied at temperatures between 200 °C and 300 °C and with residence times between 0.5 and 3 h. Spectroscopic information obtained from ATR-FTIR indicated that below 200 °C there was no obvious structural change of the wheat straw. At 200–250 °C hemicelluloses started to decompose and were totally degraded when torrefied at 300 °C for 2 h, while cellulose and lignin began to decompose at about 270–300 °C. Tensile failure strength and strain energy of oven dried wheat straw and torrefied wheat straw showed a clear reduction with increasing torrefaction temperature. In addition, Hardgrove Grindability Index (HGI) of wheat straw torrefied at different conditions was determined on a standard Hardgrove grinder. Both results showed an improvement of grindability in the torrefaction temperature range 250–300 °C, which can be well explained by the findings from FTIR analysis. At a torrefaction temperature of 260 °C and with a residence time of 2 h, wheat straw samples produced similar HGI values as coal (RUKUZN) with 0% moisture content. Under this condition, the Anhydrous Weight Loss (AWL%) of the wheat straw sample was 30% on dry and ash free basis (daf), and the higher heating value of the torrefied wheat straw was 24.2 MJ kg−1 (daf). The energy loss compared to the original material was 15% (daf).

AB - The purpose of the study was to investigate the influence of torrefaction on the grindability of wheat straw. Straw samples were torrefied at temperatures between 200 °C and 300 °C and with residence times between 0.5 and 3 h. Spectroscopic information obtained from ATR-FTIR indicated that below 200 °C there was no obvious structural change of the wheat straw. At 200–250 °C hemicelluloses started to decompose and were totally degraded when torrefied at 300 °C for 2 h, while cellulose and lignin began to decompose at about 270–300 °C. Tensile failure strength and strain energy of oven dried wheat straw and torrefied wheat straw showed a clear reduction with increasing torrefaction temperature. In addition, Hardgrove Grindability Index (HGI) of wheat straw torrefied at different conditions was determined on a standard Hardgrove grinder. Both results showed an improvement of grindability in the torrefaction temperature range 250–300 °C, which can be well explained by the findings from FTIR analysis. At a torrefaction temperature of 260 °C and with a residence time of 2 h, wheat straw samples produced similar HGI values as coal (RUKUZN) with 0% moisture content. Under this condition, the Anhydrous Weight Loss (AWL%) of the wheat straw sample was 30% on dry and ash free basis (daf), and the higher heating value of the torrefied wheat straw was 24.2 MJ kg−1 (daf). The energy loss compared to the original material was 15% (daf).

KW - Torrefaction

KW - Grindability

KW - Tensile strength

KW - Hardgrove

KW - ATR-FTIR

KW - Triticum aestivum L

U2 - 10.1016/j.biombioe.2012.01.049

DO - 10.1016/j.biombioe.2012.01.049

JO - Biomass & Bioenergy

JF - Biomass & Bioenergy

SN - 0961-9534

VL - 40

SP - 63

EP - 70

ER -