Methoxyphenols from burning of Scandinavian forest plant materials

Kjällstrand, Jennica; Ramnäs, Olle Jerker; Petersson, Göran

doi:10.1016/s0045-6535(99)00427-0

Cited by 45 publications

(39 citation statements)

References 15 publications

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“…Less volatile compounds like P AB and methoxyphenols [3] appear in a latter part of the chromatograms. The differences in response factors were small compared with the impact of burning conditions, and the response determined for vanillin was therefore used for all compOlmds [3].…”

Section: °Cmentioning

confidence: 98%

“…The methoxyphenols are formed in high proportions from incomplete burning, as primary degradation products of plant lignin [3]. Both softwood and hardwood give rise to 2-methoxyphenols, whereas 2,6-dimethoxyphenols are obtained in large proportions from hardwood only.…”

Section: Smoke Samplesmentioning

confidence: 99%

“…On the other hand, they constitute as much as half of the amount of recorded compounds in smoke from the tiled stove. The methoxyphenols include vanillin and structurally related pleasant compounds [2,3]. They have antioxidant properties [4,5], which may even counteract hazardous effects of the smoke.…”

Section: Health Hazards Relative To Burning Conditionsmentioning

confidence: 99%

“…Primary major components from combustion of lignin in wood are methoxyphenols [2,3], which possess antioxidative properties [4,5]. The wood polysaccharides give rise to 1,6-anhydroglucose [1,6].…”

Section: Introductionmentioning

confidence: 99%

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Phenols and Aromatic Hydrocarbons in Chimney Emissions from Traditional and Modern Residential Wood Burning

Kjällstrand¹,

Petersson²

2001

Environmental Technology

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The emissions from a traditional tiled stove consisted mainly of lignin-related methoxyphenols with antioxidant properties, and 1,6-anhydroglucose from cellulose degradation. A wood stove of presently introduced energy-efficient design for residential heating and hot-water supply was shown to emit small amounts of methoxyphenols and anhydrosugars from primary wood pyrolysis. Secondary harmful components like benzene and polycyclic aromatic hydrocarbons constituted a major portion of the organic emissions. It is concluded that differences in smoke composition are essential to consider in recommendations and rules for proper choices of wood burning devices.

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Section: °Cmentioning

confidence: 98%

Section: Smoke Samplesmentioning

confidence: 99%

Section: Health Hazards Relative To Burning Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phenols and Aromatic Hydrocarbons in Chimney Emissions from Traditional and Modern Residential Wood Burning

Kjällstrand¹,

Petersson²

2001

Environmental Technology

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“…It is therefore of interest to determine chimney emissions of specific organic compounds from pellet burning. Comparisons can then be made with primary thermal degradation products released from wood pellets [5], from firewood [6] and from forest biomass [7]. Comparisons can also be made with emitted volatile hydrocarbons from firewood [8].…”

Section: Introductionmentioning

confidence: 99%

Specific chimney emissions and biofuel characteristics of softwood pellets for residential heating in Sweden

Olsson

Kjällstrand

Petersson

2003

Biomass and Bioenergy

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Softwood pellets are mainly produced from sawdust and to some extent from wood shavings. The moisture content is typically less than half of that in firewood. The present annual residential use in Sweden for pellet burners in boilers and for pellet stoves amounts to more than 100 000 tonnes and is increasing rapidly. The total annual production capacity at the more than 20 units exceeds one million tonnes, and permits continued rapid replacement of firewood and petroleum oil for residential heating.With the purpose of characterising emissions to air, chimney smoke was sampled, and specific compounds were assessed by gas chromatography and mass spectrometry. Benzene was the predominant aromatic compound in emissions from pellet burners. The smoke from stoves contained methoxyphenols with antioxidant properties and lower proportions of aromatic hydrocarbons. Observed differences in emissions from specific burning appliances are of interest with regard to both health hazards and regulation of emissions.Consideration of ecological aspects and pollution hazards indicates that wood pellets should be used primarily for residential heating, whereas controlled large-scale combustion is preferable for most other types of biomass waste.

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Mass spectrometry in the biosynthetic and structural investigation of lignins

Reale

Tullio

Spreti

et al. 2004

Mass Spectrometry Reviews

131

117

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Lignin, a resistant cell-wall constituent of all vascular plants that consists of ether and carbon-linked methoxyphenols, is still far from being structurally described in detail. The main problem in its structural elucidation is the difficulty of isolating lignin from other wood components without damaging lignin itself. Furthermore, the high number and variegated forms of linkages that occur between the monomeric units and the chemical resistance of certain ether bonds limit the extent to which analytical and degradation procedures can be used to elucidate the lignin structure. Most of our present knowledge about the molecular structure of lignin is based on the analysis of monomers, dimers or, at the most, tetramers of degraded isolated lignins. Mass spectrometry (MS), which offers advantages in terms of speed, specificity, and sensitivity, has revealed to be a very powerful technique in the structural elucidation of lignins, in combination with the great number of chemical and thermal degradation methods available in the study of lignin. Moreover, the recent development of new ionization techniques in MS-electrospray ionization (ESI)-MS and matrix-assisted laser desorption/ionization (MALDI)-MS-has provided new possibilities to also analyze the undegraded lignin macromolecule.

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Methoxyphenols from burning of Scandinavian forest plant materials

Cited by 45 publications

References 15 publications

Phenols and Aromatic Hydrocarbons in Chimney Emissions from Traditional and Modern Residential Wood Burning

Phenols and Aromatic Hydrocarbons in Chimney Emissions from Traditional and Modern Residential Wood Burning

Specific chimney emissions and biofuel characteristics of softwood pellets for residential heating in Sweden

Mass spectrometry in the biosynthetic and structural investigation of lignins

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