Estimation of elemental composition from proximate analysis of black liquor

The black liquor properties will vary depending on the raw material used fo r pulping, the pulping conditions, the equipment used for pulping and the t reatment of the liquor after the pulping. Accurate analysis of black liquor is needed to determine energy efficiency of a pulp mill, to calculate gas flows for environmental compliance reports and for production statistics. B lack liquor composition and combustion properties can be estimated from kno wn spread of data. Main source has been an internal company black liquor da tabank, which contains over 900 black liquor analysis. Regression equations for black liquor carbon, hydrogen, and inorganic element contents were der ived.