Methods for producing phase stable, reduced acid biomass-derived pyrolysis oils

a biomass-derived pyrolysis oil, phase stable technology, applied in the direction of biofeedstock, liquid carbonaceous fuels, petroleum industry, etc., can solve the problems of limiting its utilization as fuel/biofuel, high oxygenation of organic liquids with properties, and low energy density and susceptibility to increased viscosity

Inactive Publication Date: 2012-02-02
UOP LLC
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Problems solved by technology

However, biomass-derived pyrolysis oil is a complex, highly oxygenated organic liquid having properties that currently limit its utilization as a fuel / biofuel, particularly for diesel applications.
For example, conventional biomass-derived pyrolysis oil has high acidity (with a low pH and high total acid number (TAN)) making it corrosive to storage, pipes, and downstream equipment, with low energy density and susceptibility to increased viscosity over time.
While the direct titration of a base to the biomass-derived pyrolysis oil reduces its acidity (as measured by an increase in pH), phase instability of the biomass-derived pyrolysis oil results.
Phase instability results in phase separation, viscosity increases, and often, solids formation.
Such phase instability reduces utilization of the biomass-derived pyrolysis oil as a biofuel.

Method used

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  • Methods for producing phase stable, reduced acid biomass-derived pyrolysis oils
  • Methods for producing phase stable, reduced acid biomass-derived pyrolysis oils
  • Methods for producing phase stable, reduced acid biomass-derived pyrolysis oils

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Embodiment Construction

[0011]The following detailed description of the invention is merely exemplary in nature and is not intended to limit the invention or the application and uses of the invention. Furthermore, there is no intention to be bound by any theory presented in the preceding background of the invention or the following detailed description of the invention.

[0012]Various exemplary embodiments of the present invention are directed to a method for producing phase stable, reduced acid biomass-derived pyrolysis oils. It should be appreciated that while the oil produced according to exemplary embodiments of the present invention is generally described herein as a “reduced acid biomass-derived pyrolysis oil”, this term generally includes any oil produced having a lower acidity than the conventional biomass-derived pyrolysis oil from which it is derived. As noted previously, “phase stability” as used herein means the ability of the oil to resist changes in chemical composition and maintain homogeneity...

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Abstract

Methods for producing phase stable, reduced acid biomass-derived pyrolysis oils are provided. Biomass-derived pyrolysis oil having a determined water content no greater than about 30% by weight is provided. A base is mixed with the biomass-derived pyrolysis oil to produce reduced acid biomass-derived pyrolysis oil. A base is selected from an inorganic base or a nitrogen-containing base.

Description

FIELD OF THE INVENTION[0001]The present invention generally relates to methods for producing biofuels, and more particularly relates to methods for producing phase stable, reduced acid biomass-derived pyrolysis oils.DESCRIPTION OF RELATED ART[0002]Fast pyrolysis is a thermal process during which solid carbonaceous biomass feedstock, i.e., “biomass”, such as wood waste, agricultural waste, etc., is rapidly heated to pyrolysis temperatures of about 300° C. to about 900° C. in the absence of air using a pyrolysis reactor. Under these conditions, solid and gaseous pyrolysis products are formed. A condensable portion (vapors) of the gaseous pyrolysis products is condensed into biomass-derived pyrolysis oil.[0003]Biomass-derived pyrolysis oil can be burned directly as fuel for certain boiler and furnace applications, and can also serve as a potential feedstock in the production of biofuels in petroleum refineries or in stand-alone process units. Biomass-derived pyrolysis oil has the poten...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10L1/10
CPCC10L1/04C10L1/02Y02P30/20
Inventor KOCH, MARK B.BRANDVOLD, TIMOTHY A.
Owner UOP LLC
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