Skip to main content
main-content
Top

Hint

Swipe to navigate through the articles of this issue

01-06-2015 | Original Article | Issue 2/2015

Biomass Conversion and Biorefinery 2/2015

Effect of holding time on fuel properties of biochars prepared from the torrefaction of coffee residue

Journal:
Biomass Conversion and Biorefinery > Issue 2/2015
Authors:
Sii-Chew Liu, Wen-Tien Tsai, Ming-Hsuan Li, Chi-Hung Tsai

Abstract

Decomposition reactions during torrefaction start at 563 K, as shown by thermogravimetric analysis (TGA), as determined by pretests. Based on these findings, different biochars were produced by torrefaction at 563 K, combined with increasing holding times (10–40 min). The fuel properties of biochar products were investigated by means of calorific value, ultimate analysis, true density, and scanning electron microscopy (SEM). The maximal increase in the calorific value of biochar occurred at about 20 min, which correlated positively with its carbon contents. More consistently, the true densities of the resulting biochar end products increased mostly within the holding time ranging from 10 to 20 min, which we proposed as the best process window for torrefaction of coffee residue. At longer holding time (>20 min), we observed a shrinking of biochar by SEM, making it more friable or brittle. It may involve more hemicellulose depolymerization, leading to a porous and corrugated structure.

Please log in to get access to this content

To get access to this content you need the following product:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 69.000 Bücher
  • über 500 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Umwelt
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Testen Sie jetzt 30 Tage kostenlos.

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

  • über 50.000 Bücher
  • über 380 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Umwelt
  • Maschinenbau + Werkstoffe




Testen Sie jetzt 30 Tage kostenlos.

Literature
About this article

Other articles of this Issue 2/2015

Biomass Conversion and Biorefinery 2/2015 Go to the issue