The effect of alkaline pretreatment on the thermal decomposition of hemp

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

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The goal of this study was to clarify the effect of alkaline pretreatments on the thermal decomposition and composition of industrial hemp (Cannabis sativa L.) samples. Thermogravimetric/mass spectrometric measurements (TG/MS) have been performed, on untreated, hot water washed, and alkali-treated hemp samples. The main differences between the thermal decomposition of the samples are interpreted in terms of the different alkali ion contents which have been determined using inductively coupled plasma-optical emission spectroscopy (ICP-OES) method. Principal component analysis (PCA) has been used to find statistical correlations between the data. Correlations have been obtained between the parameters of the thermal decomposition and the alkali ion content as well as the altered chemical structure of the samples. The differences in the thermal behavior of the samples are explained by the different K+ and Na+ contents and the changed structure of the hemicellulose component of the samples due to the pretreatments. The more alkali ions remain in the hemp samples after the alkali treatment, the more ash, char and lower molecular products are formed during thermal decomposition.

Original languageEnglish
Pages (from-to)1061-1069
Number of pages9
JournalJournal of Thermal Analysis and Calorimetry
Volume105
Issue number3
DOIs
Publication statusPublished - Sep 2011

Fingerprint

Alkalies
Cannabis
pretreatment
thermal decomposition
Pyrolysis
alkalies
Ions
Ashes
Optical emission spectroscopy
Inductively coupled plasma
statistical correlation
Principal component analysis
ions
optical emission spectroscopy
ashes
principal components analysis
Water
Chemical analysis
products
water

Keywords

  • Alkaline pretreatment
  • Hemp
  • Principal component analysis
  • Thermal decomposition
  • Thermogravimetry

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics

Cite this

The effect of alkaline pretreatment on the thermal decomposition of hemp. / Sebestyén, Zoltán; May, Zoltán; Réczey, K.; Jakab, E.

In: Journal of Thermal Analysis and Calorimetry, Vol. 105, No. 3, 09.2011, p. 1061-1069.

Research output: Contribution to journalArticle

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