Thermal behavior of native, washed and steam exploded lignocellulosic biomass samples

Zoltán Sebestyén, E. Jakab, Zoltán May, Bálint Sipos, K. Réczey

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The aim of this study was to evaluate the chemical changes in the main components (cellulose, hemicellulose and lignin) of various lignocellulosic biomass samples during the steam explosion pretreatment. Pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and thermogravimetry/mass spectrometry (TG/MS) measurements have been performed on different native, washed and steam exploded woody (willow and spruce) and herbaceous (hemp, wheat straw and sweet sorghum bagasse) biomass samples. The main differences between the thermal decomposition of the samples are interpreted in terms of the altered structure of the biomass samples by the effective steam explosion treatment and the different alkali ion contents which have been determined using inductively coupled plasma-optical emission spectroscopy (ICP-OES) method. In order to separate these two effects, the native biomass samples have been washed with hot water to remove the main parts of the potassium and sodium ions. The concentration of K+ and Na+ has been reduced in the treated biomass samples so the thermal decomposition mechanism has been altered due to the elimination of the catalytic effects. Principal Component Analysis (PCA) has been used to find statistical correlations between the data. The functional group compositions of the lignin molecules have been modified significantly as indicated by the pyrograms and the score plot of the PCA. The amount of hemicellulose has been reduced. On the other hand, the relative amount of the structurally modified cellulose has been increased in the samples by the steam explosion pretreatment step.

Original languageEnglish
Pages (from-to)61-71
Number of pages11
JournalJournal of Analytical and Applied Pyrolysis
Volume101
DOIs
Publication statusPublished - May 2013

Fingerprint

Steam
Biomass
Explosions
Pyrolysis
Lignin
Cellulose
Principal component analysis
Mass spectrometry
Ions
Salix
Hemp
Optical emission spectroscopy
Bagasse
Straw
Alkalies
Inductively coupled plasma
Cannabis
Gas chromatography
Functional groups
Potassium

Keywords

  • Biomass
  • Lignocellulose
  • Principal component analysis
  • Pyrolysis
  • Steam explosion
  • Thermogravimetry

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Thermal behavior of native, washed and steam exploded lignocellulosic biomass samples. / Sebestyén, Zoltán; Jakab, E.; May, Zoltán; Sipos, Bálint; Réczey, K.

In: Journal of Analytical and Applied Pyrolysis, Vol. 101, 05.2013, p. 61-71.

Research output: Contribution to journalArticle

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