Patent ID: 6790317
Filing Date: 2004-09-14
Classification: C10B,Y02E,Y02P

Abstract:
A process for the conversion of biomass material into charcoal or carbonized charcoal, comprising the steps of:(a) sealing said material in an enclosed container having a proximal end and a distal end whereby the non-inert contents of said container consist of said material and air; (b) pressurizing said container with air; (c) heating said material to cause it to ignite and burn; (d) controlling the pressure within said container at value P1, so that it does not exceed a limit pressure value Plimit, by releasing gas from said container; (e) optionally delivering additional air into said container to attain a temperature of above about 400Â° C. throughout said material while controlling said pressure at P1; (f) and releasing gas from said container to lower said pressure to pressure value P2.