The composition and properties of the products of fast pyrolysis of hardwood, obtained in a two-chamber ablation type reactor in the temperature range 450-600ºС, are investigated. It has been found that, upon the additional drying of wood at 200ºС and subsequent pyrolysis, the quality of bio-oil is improved owing to the decrease in the amount of water and acids. It has been shown that the increase of the drying temperature to 240ºС decreases the yield of the main product. Maximum parameters of the drying conditions and the temperature of the pyrolysis of wood, at which the bio-oil yield exceeds 60% and its calorific value makes up 17-20 МJ/kg, have been determined.
Keywords: Wood, Fast pyrolysis, Pyrolytic oil, Ablation type reactor
Authors
Urbanovich I.
Latvian State Institute of Wood Chemistry, Riga, Latvia
Dobele G.
Latvian State Institute of Wood Chemistry, Riga, Latvia
Kampars V.
Member of the Latvian Academy of Sciences, Riga Technical University, Faculty of Material Science and Applied Chemistry, Riga, Latvia
Samulis E.
Joint-Stock Company “Kņavas granulas”, Kņava, Latvia
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