Method for separating biochar from wood ash

Details Method for separating biochar from wood ash Method for separating biochar from wood ash

B - Operations, Transporting

01

J

B01J 8/24 (2006.01) B01D 11/02 (2006.01)

Patent

CA 2676514

Wood ash residues are a complex ternary mixture of small stones, biochar particles and ash. The present application shows how a combination of physical separation processes can be applied to the efficient extraction of a biochar-rich fraction. Two different techniques were tested: segregation and elutriation. The effects of the fluidization velocity on both of the processes were investigated respectively. Either technique happened to be ineffective, on its own, to obtain high purity biochar. However, a combination of segregation and elutriation proved to recover 78% of the biochar with a purity of 90%.

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