Structural and chemical modifications of typical South African biomasses during torrefaction

Lihle D. Mafu, Hein W.J.P. Neomagus, Raymond C. Everson, Marion Carrier, Christien A. Strydom, John R. Bunt

Research output: Contribution to journalArticle

Abstract

Torrefaction experiments were carried out for three typical South African biomass samples (softwood chips, hardwood chips and sweet sorghum bagasse) to a weight loss of 30wt.%. During torrefaction, moisture, non-structural carbohydrates and hemicelluloses were reduced, resulting in a structurally modified torrefaction product. There was a reduction in the average crystalline diameter (La) (XRD), an increase in the aromatic fraction and a reduction in aliphatics (substituted and unsubstituted) (CPMAS 13C NMR). The decrease in the aliphatic components of the lignocellulosic material under the torrefaction conditions also resulted in a slight ordering of the carbon lattice. The degradation of hemicelluloses and non-structural carbohydrates increased the inclusive surface area of sweet sorghum bagasse, while it did not change significantly for the woody biomasses.

Original languageEnglish
Pages (from-to)192-197
Number of pages6
JournalBioresource Technology
Volume202
Early online date14 Dec 2015
DOIs
Publication statusPublished - Feb 2016

Fingerprint

Bagasse
Chemical modification
Carbohydrates
sorghum
carbohydrate
Biomass
Softwoods
Hardwoods
biomass
nuclear magnetic resonance
Moisture
Carbon
surface area
X-ray diffraction
Nuclear magnetic resonance
moisture
Crystalline materials
Degradation
degradation
carbon

Bibliographical note

-

Keywords

  • biomass
  • CP-MAS C NMR
  • torrefaction
  • XRD

Cite this

Mafu, L. D., Neomagus, H. W. J. P., Everson, R. C., Carrier, M., Strydom, C. A., & Bunt, J. R. (2016). Structural and chemical modifications of typical South African biomasses during torrefaction. Bioresource Technology, 202, 192-197. https://doi.org/10.1016/j.biortech.2015.12.007
Mafu, Lihle D. ; Neomagus, Hein W.J.P. ; Everson, Raymond C. ; Carrier, Marion ; Strydom, Christien A. ; Bunt, John R. / Structural and chemical modifications of typical South African biomasses during torrefaction. In: Bioresource Technology. 2016 ; Vol. 202. pp. 192-197.
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Mafu, LD, Neomagus, HWJP, Everson, RC, Carrier, M, Strydom, CA & Bunt, JR 2016, 'Structural and chemical modifications of typical South African biomasses during torrefaction', Bioresource Technology, vol. 202, pp. 192-197. https://doi.org/10.1016/j.biortech.2015.12.007

Structural and chemical modifications of typical South African biomasses during torrefaction. / Mafu, Lihle D.; Neomagus, Hein W.J.P.; Everson, Raymond C.; Carrier, Marion; Strydom, Christien A.; Bunt, John R.

In: Bioresource Technology, Vol. 202, 02.2016, p. 192-197.

Research output: Contribution to journalArticle

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