Patent ID: 8436120
Filing Date: 2013-05-07
Classification: C05D,C05G,C10B,C10C,C10J,C10K,C10L,Y02E,Y02P,Y10T

Abstract:
1. An improved fast pyrolysis method of the type used to decompose biomass into a non-bio-oil product, said fast pyrolysis method characterized by the steps of i) combining the biomass, a carrier gas, and a particulate solid source of heat in a pyrolysis chamber, ii) allowing the biomass to decompose during an apparent vapor residence time, and ii) collecting a product, wherein the improvement comprises the steps of: Step (a) directing superheated steam into the pyrolysis chamber; Step (b) applying to the pyrolysis chamber sufficient heat from an external source to raise the temperature in the chamber to at least about 430° C.; Step (c) collecting a stream containing char; Step (d) collecting an aerosol stream; Step (e) producing a gas stream and a condensables stream from the aerosol stream of Step (d); and, Step (f) separating the condensables stream of Step (e) into i) an aqueous product stream and ii) oligomeric lignin.