Abstract
The organic compounds released in the thermal drying of peat and bark, and their behaviour in downstream sections, were studied to determine their impact on the formation of deposits in processes and on the environment. The releases were studied using laboratory-scale fluidized-bed drying experiments carried out on peat, pine bark and birch bark at different temperatures. In addition, peat particle and deposit samples were taken from the drying system of a peat power plans and bark, condensate and deposit samples from a pressurized steam dryer at a pulp mill. The hydrophillic compounds released were analysed using different chromatographic methods. All the samples were analysed for lipophilic extractives using capillary gas chromatography and mass spectrometry. The lipid composition of Finnish peat and peat extracts was investigated at the beginning of the study. The main hydrophillic compounds released from peat and barks were short-chain carboxylic acids, methanol, aliphatic aldehydes, anhydroglucoses and furanoic compounds. The hydrophillic compounds may cause organic load on the recipient or emissions to the air. Their amounts can be decreased by using lower drying temperatures. The major lipophilic compound groups released from peat consisted of fatty acids, those from pine bark of fatty acids and resin acids, and those
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Fagernaes, L
[1]
- Technical Research Centre of Finland, Espoo (Finland). Lab. of Fuel and Process Technology
Citation Formats
Fagernaes, L.
Peat and bark extractives and their behaviour in drying processes.
Finland: N. p.,
1992.
Web.
Fagernaes, L.
Peat and bark extractives and their behaviour in drying processes.
Finland.
Fagernaes, L.
1992.
"Peat and bark extractives and their behaviour in drying processes."
Finland.
@misc{etde_10148285,
title = {Peat and bark extractives and their behaviour in drying processes}
author = {Fagernaes, L}
abstractNote = {The organic compounds released in the thermal drying of peat and bark, and their behaviour in downstream sections, were studied to determine their impact on the formation of deposits in processes and on the environment. The releases were studied using laboratory-scale fluidized-bed drying experiments carried out on peat, pine bark and birch bark at different temperatures. In addition, peat particle and deposit samples were taken from the drying system of a peat power plans and bark, condensate and deposit samples from a pressurized steam dryer at a pulp mill. The hydrophillic compounds released were analysed using different chromatographic methods. All the samples were analysed for lipophilic extractives using capillary gas chromatography and mass spectrometry. The lipid composition of Finnish peat and peat extracts was investigated at the beginning of the study. The main hydrophillic compounds released from peat and barks were short-chain carboxylic acids, methanol, aliphatic aldehydes, anhydroglucoses and furanoic compounds. The hydrophillic compounds may cause organic load on the recipient or emissions to the air. Their amounts can be decreased by using lower drying temperatures. The major lipophilic compound groups released from peat consisted of fatty acids, those from pine bark of fatty acids and resin acids, and those from birch bark of triterpenoid alcohols. The peat lipids, and particularly the fatty acids, were enriched in the particle samples from the gas flows and in the deposit samples from the drying mill and the flue gas blower of the peat power plans.}
place = {Finland}
year = {1992}
month = {Dec}
}
title = {Peat and bark extractives and their behaviour in drying processes}
author = {Fagernaes, L}
abstractNote = {The organic compounds released in the thermal drying of peat and bark, and their behaviour in downstream sections, were studied to determine their impact on the formation of deposits in processes and on the environment. The releases were studied using laboratory-scale fluidized-bed drying experiments carried out on peat, pine bark and birch bark at different temperatures. In addition, peat particle and deposit samples were taken from the drying system of a peat power plans and bark, condensate and deposit samples from a pressurized steam dryer at a pulp mill. The hydrophillic compounds released were analysed using different chromatographic methods. All the samples were analysed for lipophilic extractives using capillary gas chromatography and mass spectrometry. The lipid composition of Finnish peat and peat extracts was investigated at the beginning of the study. The main hydrophillic compounds released from peat and barks were short-chain carboxylic acids, methanol, aliphatic aldehydes, anhydroglucoses and furanoic compounds. The hydrophillic compounds may cause organic load on the recipient or emissions to the air. Their amounts can be decreased by using lower drying temperatures. The major lipophilic compound groups released from peat consisted of fatty acids, those from pine bark of fatty acids and resin acids, and those from birch bark of triterpenoid alcohols. The peat lipids, and particularly the fatty acids, were enriched in the particle samples from the gas flows and in the deposit samples from the drying mill and the flue gas blower of the peat power plans.}
place = {Finland}
year = {1992}
month = {Dec}
}