Analysis of the influence of pre-treatment with liquid hot water (LHW) on the chemical composition of wooden chips

The goal of this paper is to analyze the chemical composition untreated and treated wooden chips from native narrow-leaved ash (Fraxinus angustifolia Vahl. ssp. Pannonica Soó & Simon). In order determine effect pretreatment with liquid hot water (LHW) on changes in composition, content moisture, cellulose, lignin, minerals (ash), extractives soluble water, organic solvents, for was determined. This done accordance TAPPI ASTM standard methods. properties chips, 30 min 60 at a temperature 100 °C, are compared that occurred defined as result applied treatments. research performed under controlled conditions laboratory, results treatments were subject comparative analysis. Applied had statistically significant decreasing extractives. cellulose hemicellulose increased while lignin did not significantly change.