A Comparative Study of Pyrolysis Liquids by Slow Pyrolysis of Industrial Hemp Leaves, Hurds and Roots

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ID: 265651
2021
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This study assessed the pyrolysis liquids obtained by slow pyrolysis of industrial hemp leaves, hurds, and roots. The liquids recovered between a pyrolysis temperature of 275–350 °C, at two condensation temperatures 130 °C and 70 °C, were analyzed. Aqueous and bio-oil pyrolysis liquids were produced and analyzed by proton nuclear magnetic resonance (NMR), gas chromatography–mass spectrometry (GC-MS), and atmospheric pressure photoionization Fourier transform ion cyclotron resonance mass spectrometry (APPI FT-ICR MS). NMR revealed quantitative concentrations of the most abundant compounds in the aqueous fractions and compound groups in the oily fractions. In the aqueous fractions, the concentration range of acetic acid was 50–241 gL−1, methanol 2–30 gL−1, propanoic acid 5–20 gL−1, and 1-hydroxybutan-2-one 2 gL−1. GC-MS was used to compare the compositions of the volatile compounds and APPI FT-ICR MS was utilized to determine the most abundant higher molecular weight compounds. The different obtained pyrolysis liquids (aqueous and oily) had various volatile and nonvolatile compounds such as acetic acid, 2,6-dimethoxyphenol, 2-methoxyphenol, and cannabidiol. This study provides a detailed understanding of the chemical composition of pyrolysis liquids from different parts of the industrial hemp plant and assesses their possible economic potential.
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Authors Ayobami Salami;Jorma Heikkinen;Laura Tomppo;Marko Hyttinen;Timo Kekäläinen;Janne Jänis;Jouko Vepsäläinen;Reijo Lappalainen;Salami, Ayobami;Heikkinen, Jorma;Tomppo, Laura;Hyttinen, Marko;Kekäläinen, Timo;Jänis, Janne;Vepsäläinen, Jouko;Lappalainen, Reijo;
Journal molecules
Year 2021
DOI 10.3390/molecules26113167
URL
https://doi.org/10.3390/molecules26113167
Keywords
NMR gc-ms economic assessment chemical characterization volatile compounds pyrolysis liquid slow pyrolysis industrial hemp appi ft-icr ms nonvolatile compounds

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