Method for thermal transformation of biomass

Abstract

In the method for thermal biomass processing, comprising charging the material in a converter, pyrolyzing said material at a temperature ranging between 650 and 950° C. in the medium of a reducing gas, feeding of steam after the pyrolysis reaction has been completed, and isolating the resultant solid residue, reducing gas is prepared by combusting a hydrocarbon fuel at an air consumption factor α ranging from 0.85 to 1.1, and by mixing the resultant combustion products together with the biomass pyrolysis gases, the ratio between said gases and said combustion products being (1-3):1. The proposed method for biomass processing makes possible using a biomass as a pollution-free fuel, as well as for simultaneously producing activated charcoal having high specific surface area ranging from 280 to 500 ml/100 g.

1 . A method for thermal biomass processing, comprising charging the material in a converter, pyrolyzing said material at a temperature ranging between 650 and 950° C. in the medium of a reducing gas, feeding of steam after the pyrolysis reaction has been completed, and isolating the resultant solid residue, CHARACTERIZED in that said reducing gas is prepared by combusting a hydrocarbon fuel at an air consumption factor a ranging from 0.85 to 1.1, and by mixing the resultant combustion products together with the biomass pyrolysis gases, the ratio between said gases and said combustion products being (1-3):1.  
     
     
         2 . The method of  claim 1 , CHARACTERIZED in that saturated steam is fed at a temperature ranging from 105 and 140° C., and a weight percentage ratio between said saturated steam and the material being processed is equal to (0.1-0.25):1.