Patent ID: 8353973

Claim:
A method for subjecting biomass to pyrolysis to extract bio-fuel therefrom, the method comprising the steps of: providing a pyrolysis unit having a burn enclosure with an igniter, a combustion chamber, an inner pyrolysis chamber, and an outer pyrolysis chamber, the chambers arranged generally concentrically such that the combustion chamber is innermost substantially surrounded by the inner pyrolysis chamber which is substantially surrounded by the outer pyrolysis chamber, a first proximate end of the combustion chamber extending from and in communication with an end of a rearward portion of the burn enclosure, and a second distal end of the combustion chamber in communication with a first proximate end of the inner pyrolysis chamber, and a second distal end of the inner pyrolysis chamber in communication with a first proximate end of the outer pyrolysis chamber; injecting an admixture of air and fuel under pressure into the burn enclosure and igniting the admixture to facilitate combustion of the admixture in a first direction through the combustion chamber while also substantially deoxygenating the combustion chamber; introducing biomass into the pyrolysis unit at a location proximate to both the second end of the combustion chamber and the first end of the inner pyrolysis chamber, in the presence of sufficient temperature and absence of oxygen to cause pyrolysis of the biomass to occur along the length of the inner pyrolysis chamber between the first and second ends thereof, and to further continue pyrolysis if necessary in the outer pyrolysis chamber between the first end and a second distal end thereof; fitting a capturing and channeling means proximate to the second end of the outer pyrolysis chamber to effectuate removal of exhaust gases containing entrained matter resulting from pyrolytic reactions within the pyrolysis unit; and separating and collecting bio-fuel entrained in the exhaust gases.