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Methoxyphenols in smoke from biomass burning

Abstract

Wood and other forest plant materials were burned in laboratory experiments with the ambition to simulate the natural burning course in a fireplace or a forest fire. Smoke samples were taken and analysed with respect to methoxyphenols, using gas chromatography and mass spectrometry. Different kinds of bio pellets, intended for residential heating were studied in the same way. The aim of a first study was to establish analytical data to facilitate further research. Thirty-six specific methoxyphenols were identified, and gas chromatographic retention and mass spectrometric data were determined for these. In a subsequent study, the methoxyphenol emissions from the burning of wood and other forest plant materials were investigated. Proportions and concentrations of specific methoxyphenols were determined. Methoxyphenols and anhydrosugars, formed from the decomposition of lignin and cellulose respectively, were the most prominent semi-volatile compounds in the biomass smoke. The methoxyphenol compositions reflected the lignin structures of different plant materials. Softwood smoke contained almost only 2-methoxyphenols, while hardwood smoke contained both 2-methoxyphenols and 2,6-dimethoxyphenols. The methoxyphenols in smoke from pellets, made of sawdust, bark and lignin, reflected the source of biomass. Although smoke from incompletely burned wood contains mainly methoxyphenols and anhydrosugars, there is also a smaller amount of well-known  More>>
Authors:
Publication Date:
Jul 01, 2000
Product Type:
Thesis/Dissertation
Report Number:
NEI-SE-311
Reference Number:
EDB-00:094949
Resource Relation:
Other Information: TH: Thesis (TeknL); 81 refs, 18 figs; PBD: 2000
Subject:
09 BIOMASS FUELS; 54 ENVIRONMENTAL SCIENCES; WOOD; LIGNIN; COMBUSTION; ANTIOXIDANTS; METHOXY RADICALS; WOOD WASTES; SMOKES; HEALTH HAZARDS
OSTI ID:
20068732
Research Organizations:
Chalmers Univ. of Technology, Goeteborg (Sweden). Dept. of Chemical Environmental Science
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
TRN: SE0007225
Availability:
Also available from: Chalmers Univ. of Technology, Dept. of Chemical Environmental Science, SE-412 96 Goeteborg, Sweden; Available to ETDE participating countries only(see www.etde.org); commercial reproduction prohibited; OSTI as DE20068732
Submitting Site:
SWD
Size:
56 pages
Announcement Date:

Citation Formats

Kjaellstrand, J. Methoxyphenols in smoke from biomass burning. Sweden: N. p., 2000. Web.
Kjaellstrand, J. Methoxyphenols in smoke from biomass burning. Sweden.
Kjaellstrand, J. 2000. "Methoxyphenols in smoke from biomass burning." Sweden.
@misc{etde_20068732,
title = {Methoxyphenols in smoke from biomass burning}
author = {Kjaellstrand, J}
abstractNote = {Wood and other forest plant materials were burned in laboratory experiments with the ambition to simulate the natural burning course in a fireplace or a forest fire. Smoke samples were taken and analysed with respect to methoxyphenols, using gas chromatography and mass spectrometry. Different kinds of bio pellets, intended for residential heating were studied in the same way. The aim of a first study was to establish analytical data to facilitate further research. Thirty-six specific methoxyphenols were identified, and gas chromatographic retention and mass spectrometric data were determined for these. In a subsequent study, the methoxyphenol emissions from the burning of wood and other forest plant materials were investigated. Proportions and concentrations of specific methoxyphenols were determined. Methoxyphenols and anhydrosugars, formed from the decomposition of lignin and cellulose respectively, were the most prominent semi-volatile compounds in the biomass smoke. The methoxyphenol compositions reflected the lignin structures of different plant materials. Softwood smoke contained almost only 2-methoxyphenols, while hardwood smoke contained both 2-methoxyphenols and 2,6-dimethoxyphenols. The methoxyphenols in smoke from pellets, made of sawdust, bark and lignin, reflected the source of biomass. Although smoke from incompletely burned wood contains mainly methoxyphenols and anhydrosugars, there is also a smaller amount of well-known hazardous compounds present. The methoxyphenols are antioxidants. They appear mainly condensed on particles and are presumed to be inhaled together with other smoke components. As antioxidants, phenols interrupt free radical chain reactions and possibly counteract the effect of hazardous smoke components. Health hazards of small-scale wood burning should be re-evaluated considering antioxidant effects of the methoxyphenols.}
place = {Sweden}
year = {2000}
month = {Jul}
}