Low water biomass-derived pyrolysis oils and processes for producing the same
AssigneeEnsyn Renewables, Inc.
InventorsStanley J. Frey, Douglas A. Clarke
Life of this patent
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Abstract
Low water-containing biomass-derived pyrolysis oils and processes for producing them are provided. The process includes condensing pyrolysis gases including condensable pyrolysis gases and non-condensable gases to separate the condensable pyrolysis gases from the non-condensable gases, the non-condensable gases having a water content, drying the non-condensable pyrolysis gases to reduce the water content of the-non-condensable gases to form reduced-water non-condensable pyrolysis gases, and providing the reduced-water non-condensable pyrolysis gases to a pyrolysis reactor for forming the biomass-derived pyrolysis oil.
Claims16
A process for lowering water in a biomass-derived pyrolysis oil, comprising:
- i) condensing pyrolysis gases to separate condensable pyrolysis gases from water-containing non-condensable pyrolysis gases;
- ii) drying the water-containing non-condensable pyrolysis gases to reduce the water content of the water-containing non-condensable pyrolysis gases to form reduced-water non-condensable pyrolysis gases;
- iii) providing the reduced-water non-condensable pyrolysis gases to a pyrolysis reactor;
- iv) pyrolyzinq a biomass material in the pyrolysis reactor with the reduced-water non-condensable pyrolysis gases to form reduced-water pyrolysis gases;
- and
- v) condensing at least a portion of the reduced-water pyrolysis gases to form a low-water biomass-derived pyrolysis oil.
A process for preparing low-water biomass-derived pyrolysis oil, comprising:
- i) introducing pyrolysis gases into a condenser, wherein the pyrolysis gases comprise condensable pyrolysis gases and water-containing non-condensable pyrolysis gases;
- ii) adjusting the condenser to a predetermined temperature to provide a threshold vapor pressure of water in the condenser to thereby provide a maximum water content included in the low-water biomass-derived pyrolysis oil;
- iii) condensing the pyrolysis gases in the condenser to separate the condensable pyrolysis gases from the water-containing non-condensable pyrolysis gases;
- iv) drying the water-containing non-condensable pyrolysis gases to reduce the water content of water-containing non-condensable pyrolysis gases to form reduced-water non-condensable pyrolysis gases;
- v) providing the reduced-water non-condensable pyrolysis gases to a pyrolysis reactor;
- vi) pyrolyzing a biomass material in the pyrolysis reactor with the reduced-water non-condensable pyrolysis gases to form reduced-water pyrolysis gases;
- and
- vii) condensing at least a portion of the reduced-water pyrolysis gases to form the low-water biomass-derived pyrolysis oil.
A process for preparing low-water biomass-derived pyrolysis oil, comprising:
- i) condensing pyrolysis gases to separate condensable pyrolysis gases from water-containing non-condensable pyrolysis gases;
- ii) drying the water-containing non-condensable pyrolysis gases to reduce the water content of the water-containing non-condensable pyrolysis gases to form reduced-water non-condensable pyrolysis gases;
- iii) providing the reduced-water non-condensable pyrolysis gases to a pyrolysis reactor;
- iv) pyrolyzing a biomass material in the pyrolysis reactor with the reduced-water non-condensable pyrolysis gases to form reduced-water pyrolysis gases;
- and
- v) condensing at least a portion of the reduced-water pyrolysis gases to form the low-water biomass-derived pyrolysis oil, the low-water biomass-derived pyrolysis oil having a water content in a range of about 2% to about 30%.
Dependencies are inferred from the claim text.