Biomass pretreatment for fast pyrolysis to liquids
First Claim
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1. A method for producing an organic liquid product from a solid biomass, the method comprising:
- (a) pre-processing the solid biomass to produce a modified solid biomass, wherein the step of pre-processing comprises demineralization, solvent explosion, heat treatment or any combination of any of the foregoing, wherein in the solid biomass is subjected to one or more of;
(1) demineralization and wherein the demineralization comprises(i) contacting the solid biomass with a solvent to produce a swelled biomass;
(ii) removing at least part of the solvent from the swelled biomass; and
(iii) optionally repeating the steps of contacting and removing;
(2) solvent explosion and wherein the solvent is ammonia, water or carbon dioxide;
(b) contacting the pre-processed biomass with an inorganic material present in an effective amount for increasing pyrolysis yield of an organic liquid product to form a pre-treated biomass, wherein the inorganic material is aluminum sulfate, ammonium hydroxide, or any combination of any of the foregoing; and
(c) subjecting the solid pre-treated biomass to a pyrolysis reaction in the presence of the inorganic material to produce the organic liquid product.
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Abstract
Aspects of the present invention relate to methods, systems, and compositions for preparing a solid biomass for fast pyrolysis. The method includes contacting the solid biomass with an inorganic material present in an effective amount for increasing fast pyrolysis yield of an organic liquid product (e.g., bio-oil). In various embodiments, the inorganic material is selected from the group consisting of aluminum sulfate, aluminum nitrate, aluminum chloride, aluminum hydroxide, ammonium hydroxide, magnesium hydroxide, potassium hydroxide, and combinations thereof.
22 Citations
17 Claims
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1. A method for producing an organic liquid product from a solid biomass, the method comprising:
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(a) pre-processing the solid biomass to produce a modified solid biomass, wherein the step of pre-processing comprises demineralization, solvent explosion, heat treatment or any combination of any of the foregoing, wherein in the solid biomass is subjected to one or more of; (1) demineralization and wherein the demineralization comprises (i) contacting the solid biomass with a solvent to produce a swelled biomass; (ii) removing at least part of the solvent from the swelled biomass; and (iii) optionally repeating the steps of contacting and removing; (2) solvent explosion and wherein the solvent is ammonia, water or carbon dioxide; (b) contacting the pre-processed biomass with an inorganic material present in an effective amount for increasing pyrolysis yield of an organic liquid product to form a pre-treated biomass, wherein the inorganic material is aluminum sulfate, ammonium hydroxide, or any combination of any of the foregoing; and (c) subjecting the solid pre-treated biomass to a pyrolysis reaction in the presence of the inorganic material to produce the organic liquid product. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for producing an organic liquid product from a solid biomass, the method comprising:
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(a) contacting the solid biomass with a solvent to produce a swelled biomass; (b) removing at least part of the solvent from the swelled biomass to remove at least part of the minerals from the biomass forming a demineralized solid biomass; (c) contacting the demineralized solid biomass with an inorganic material present in an effective amount for increasing pyrolysis yield of an organic liquid product to form a pre-treated biomass, wherein the inorganic material is aluminum sulfate, ammonium hydroxide, or any combination of any of the foregoing; and (d) subjecting the solid pre-treated biomass to a pyrolysis reaction in the presence of the inorganic material to produce the organic liquid product. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method for pretreating a solid biomass for pyrolysis, the method comprising:
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(a) pre-processing the solid biomass to produce a modified solid biomass, wherein the step of pre-processing comprises demineralization, solvent explosion, heat treatment or any combinations of the foregoing, wherein the solid biomass is subjected to solvent explosion and wherein the solvent is ammonia, water or carbon dioxide; and (b) contacting the pre-processed biomass with an inorganic material present in an effective amount for increasing pyrolysis yield of an organic liquid product to form a pre-treated biomass, wherein the inorganic material is aluminum sulfate, ammonium hydroxide, or any combination of any of the foregoing. - View Dependent Claims (15, 16, 17)
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Specification