Investigation of Tar Properties for Tar Removal by Scrubbing

A new concept to remove tar by scrubbing from biomass gasification gas is investigated. The concept is based on a system capable to remove the tars in two sequential stages: heavy tars are removed in a first hot absorber and the light tars (and water) are removed in a second, colder, absorber. The liquid stream contain light tars is recirculated to the first absorber to be used as primary solvent. Key data (viscosity and the melting temperature of various liquid mixtures) are investigated to preliminary assess the performance of the proposed system