In-situ upgrading of biomass pyrolysis vapor using acid catalyst and alcohol
AssigneeChevron U.S.A. Inc.
InventorsYunquan Liu, Armando Joseph Belardinelli, Curtis L. Krause
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Abstract
Processes for thermal conversion of biomass are provided. The processes involve upgrading the pyrolysis vapor from a pyrolysis reactor. The steps include thermally converting a biomass feedstock in a pyrolysis reactor, recovering a pyrolysis vapor from the reactor, passing the pyrolysis vapor in contact with an acid catalyst in the presence of alcohol, and converting the resulting upgraded pyrolysis vapor into a liquid product. The resulting biooil liquid product is more refined, and the overall processes offer economic and energy efficiency.
Claims6
A process for the thermal conversion of biomass comprising the steps of:
- a) thermal conversion of a biomass feedstock in a pyrolysis reactor;
- b) recovering a pyrolysis vapor from the reactor;
- c) passing the pyrolysis vapor in contact with an acid catalyst in the presence of an alcohol to produce an upgraded pyrolysis vapor;
- and
- d) converting the upgraded pyrolysis vapor from step c) into a liquid product.
Dependencies are inferred from the claim text.