Liquefaction of biomass at low pH
First Claim
1. A method for treatment of a biomass feedstock comprisingsubjecting the biomass feedstock to liquefaction, by treatment with hot compressed liquid water (HCW) at a subcritical condition;
- wherein the liquefaction is carried outat a temperature of from 330°
C. to below 374°
C.,at a pH below 3.0, andfor a reaction time below 1 minute.
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Abstract
The present invention relates to regulation of the p H of a liquefaction process. Presented is a method for treatment of a biomass feedstock wherein the biomass feedstock is subjected to liquefaction, at a p H of at most 4, by treatment with hot compressed liquid water (HCW) at subcritical and/or supercritical conditions to improve the conversion efficiency. The present invention is also directed to quenching of a liquefaction process according to above, preventing, minimizing or eliminating clogging and/or fouling of sticky biomass components in process equipment during processing as according to above, and to the use of additives in a biomass liquefaction process.
42 Citations
29 Claims
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1. A method for treatment of a biomass feedstock comprising
subjecting the biomass feedstock to liquefaction, by treatment with hot compressed liquid water (HCW) at a subcritical condition; wherein the liquefaction is carried out at a temperature of from 330°
C. to below 374°
C.,at a pH below 3.0, and for a reaction time below 1 minute. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
Specification