Patent ID: 9175235
Filing Date: 2015-11-03
Classification: C10G,C10L

Abstract:
1. A method for reducing coke deposition on a catalyst used in cracking of a pyrolysis oil vapor, the method comprising: (a) subjecting a biomass to torrefaction; (b) pyrolyzing the torrefaction-treated biomass, thereby generating a heated pyrolysis oil vapor; (c) catalytically esterifying the heated pyrolysis oil vapor or components thereof, thereby providing a heated pyrolysis oil vapor having a reduced acid and aldehyde content compared to a heated pyrolysis oil vapor not catalytically esterified; and (d) cracking the catalytically esterified heated pyrolysis oil vapor, thereby generating a bio-oil, wherein said cracking step comprises contacting the heated pyrolysis oil vapor with a second catalyst, and wherein said catalyst accumulates a reduced coke deposition compared to when the heated pyrolysis oil vapor is generated from a biomass not treated with torrefaction.