Abstract

North American wood species have been pyrolysed in a vacuum-pyrolysis, laboratory reactor under various conditions. The pyrolysis oils were analyzed in detail for their content in phenolic compounds after derivatization to their acetyl derivatives. Pyrolysis process conditions such as temperature, heating rate, sample amount, particle size, vapour residence time, biomass moisture content and additives and/or catalysts leading to high yield of valuable phenolic compounds have been investigated. The influence of such parameters on the formation of syringylic and guaiacylic compounds is discussed.

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