Patent ID: 9670413
Date: 2017-06-06
CPC Classifications: C10B,Y02E,Y02P

Claim:
1. A method, comprising: i) introducing char and a heat transfer medium into a reheater; ii) combusting at least a portion of the char with an excess amount of an oxygen-containing gas to form an oxygen-containing flue gas and a heated heat transfer medium; iii) adjusting said excess amount of the oxygen containing gas to control the reheater temperature; iv) forming a low-oxygen carrier gas, comprising: passing at least a portion of the oxygen-containing flue gas through an external reduction unit; and v) contacting a biomass with the heated heat transfer medium and a portion of the low-oxygen carrier gas in a fast pyrolysis reactor to form the char, wherein said low-oxygen carrier gas has an oxygen content of about 0 vol %.