Patent ID: 7931783

Claim:
A method for producing pyrolysis liquid from biomass, comprising the step of decomposing the biomass into pyrolysis liquid, char and pyrolysis gas in a fast pyrolysis process, the method comprising the steps of: feeding the biomass into a centrifuge chamber; rotating a rotor to impart rotation on biomass distributed in gas volume in the centrifuge chamber, whereby the biomass is forced towards an outer wall of the centrifuge chamber by centrifugal forces, which provide an even pressure of biomass against said outer wall of the centrifuge chamber; decomposing the biomass into pyrolysis vapors and char by maintaining said outer wall at a temperature of 350-700 degrees Celsius to effect the pyrolysis process at or near the outer wall of the centrifuge chamber; separating the pyrolysis vapours and char; conveying the pyrolysis vapors and char away from the centrifuge chamber; condensing the at least a portion of said pyrolysis vapors to obtain said pyrolysis liquid and pyrolysis gas.