Methods for producing low oxygen biomass-derived pyrolysis oils

摘要

Methods for producing low oxygen biomass-derived pyrolysis oil are provided. Starting biomass-derived pyrolysis oil is deoxygenated by exposing the biomass-derived oil to a first catalyst in the presence of hydrogen-containing gas at first hydroprocessing conditions to produce a partially deoxygenated biomass-derived pyrolysis oil. The first catalyst has a neutral catalyst support. The partially deoxygenated biomass-derived pyrolysis oil is exposed to a second catalyst in the presence of additional hydrogen-containing gas at second hydroprocessing conditions to produce a hydrocarbon product. The biomass-derived pyrolysis oil may be esterified prior to deoxygenation. A portion of the low oxygen biomass-derived pyrolysis oil is recycled.

主权项

1. A method for producing low oxygen biomass-derived pyrolysis oil, the method comprising the steps of:
reducing the solids content of biomass-derived pyrolysis oil to less than about 0.10%; reducing the total metals content thereof to less than about 100 ppm; reducing the water content thereof to less than about 20 weight percent (wt. %), the steps of reducing the solids content, the metals content, and the water content producing a treated biomass-derived pyrolysis oil; and esterifying the treated biomass-derived pyrolysis oil followed by deoxygenating the treated biomass-derived pyrolysis oil in the presence of a hydrogen containing gas and a catalyst.