The effect of alkaline pretreatment on the thermal decomposition of hemp |
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Authors: | Zoltán Sebestyén Zoltán May Kati Réczey Emma Jakab |
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Institution: | 1.Institute of Materials and Environmental Chemistry, Chemical Research Center,Hungarian Academy of Sciences,Budapest,Hungary;2.Department of Applied Biotechnology and Food Science,Budapest University of Technology and Economics,Budapest,Hungary |
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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. |
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Keywords: | |
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