BIOMASS TREATMENT FOR HYDROTHERMAL HYDROCATALYTIC CONVERSION
First Claim
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1. A method for selective removal of a detrimental metals and their anion species from a cellulosic biomass solids comprising:
- a. providing a detrimental species-containing cellulosic biomass solids;
b. introducing said detrimental species-containing cellulosic biomass solids from an inlet into a treatment vessel, said cellulosic biomass solids having a true interstitial volume in said vessel;
c. introducing an acidic solution having a pH of at most 4 from an inlet to said cellulosic biomass solids containing vessel at a temperature in the range of 0°
C. to 60°
C. in an amount to fill at least about 5% bed volume to at most about 40% bed volume of said true interstitial volume;
d. subsequently to step c, introducing an aqueous solution having a pH of at least 5 from an inlet to said acidic cellulosic biomass solids-containing vessel, thereby producing washed cellulosic biomass solids having reduced detrimental species content compared to the detrimental species-containing cellulosic biomass solids and an acidic water effluent, wherein said acidic water effluent is in the range of about 3 parts to about 0.5 parts relative to about 1 part of detrimental species-containing cellulosic biomass solids (dry basis);
e. introducing a removal stream comprising a gas stream or an organic solvent solution from an inlet to the vessel containing the washed cellulosic biomass solids thereby producing a pretreated cellulosic biomass solids with reduced water content compared to the water washed cellulosic biomass solids and an aqueous effluent;
f. discharging the pretreated cellulosic biomass solids from an outlet and transferring at least a portion of the discharged pretreated biomass solids to a digestion and/or reaction zone;
g. recycling at least a first portion of the aqueous effluent to produce acidic solution; and
h. recycling at least a second portion of the aqueous effluent as an aqueous solution.
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Abstract
A selective removal of metal and its anion species that are detrimental to subsequent hydrothermal hydrocatalytic conversion from the biomass feed prior to carrying out catalytic hydrogenation/hydrogenolysis/hydrodeoxygenation of the biomass in a manner that does not reduce the effectiveness of the hydrothermal hydrocatalytic treatment while minimizing the amount of water used in the process is provided.
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Citations
38 Claims
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1. A method for selective removal of a detrimental metals and their anion species from a cellulosic biomass solids comprising:
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a. providing a detrimental species-containing cellulosic biomass solids; b. introducing said detrimental species-containing cellulosic biomass solids from an inlet into a treatment vessel, said cellulosic biomass solids having a true interstitial volume in said vessel; c. introducing an acidic solution having a pH of at most 4 from an inlet to said cellulosic biomass solids containing vessel at a temperature in the range of 0°
C. to 60°
C. in an amount to fill at least about 5% bed volume to at most about 40% bed volume of said true interstitial volume;d. subsequently to step c, introducing an aqueous solution having a pH of at least 5 from an inlet to said acidic cellulosic biomass solids-containing vessel, thereby producing washed cellulosic biomass solids having reduced detrimental species content compared to the detrimental species-containing cellulosic biomass solids and an acidic water effluent, wherein said acidic water effluent is in the range of about 3 parts to about 0.5 parts relative to about 1 part of detrimental species-containing cellulosic biomass solids (dry basis); e. introducing a removal stream comprising a gas stream or an organic solvent solution from an inlet to the vessel containing the washed cellulosic biomass solids thereby producing a pretreated cellulosic biomass solids with reduced water content compared to the water washed cellulosic biomass solids and an aqueous effluent; f. discharging the pretreated cellulosic biomass solids from an outlet and transferring at least a portion of the discharged pretreated biomass solids to a digestion and/or reaction zone; g. recycling at least a first portion of the aqueous effluent to produce acidic solution; and h. recycling at least a second portion of the aqueous effluent as an aqueous solution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 36)
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18. A method for selective removal of a detrimental metals and their anion species from a cellulosic biomass solids comprising:
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a. providing a detrimental species-containing cellulosic biomass solids; b. introducing said detrimental species-containing cellulosic biomass solids from an inlet into a treatment vessel, said cellulosic biomass solids having a true interstitial volume in said vessel; c. introducing an acidic solution having a pH of at most 4 from an inlet to said cellulosic biomass solids containing vessel at a temperature in the range of 0°
C. to 60°
C. in an amount to fill at least about 5% bed volume to at most about 40% bed volume of said true interstitial volume;d. subsequently to step c, introducing an aqueous solution having a pH of at least 5 from an inlet to said acidic cellulosic biomass solids-containing vessel, thereby producing washed cellulosic biomass solids having reduced detrimental species content compared to the detrimental species-containing cellulosic biomass solids and an acidic water effluent; e. introducing a base solution having a pH of at least 9 from an inlet to said washed cellulosic biomass solids containing vessel at a temperature in the range of 0°
C. to 60°
C. in an amount to fill at least about 5% bed volume to at most about 40% bed volume of said true interstitial volume;f. subsequently to step e, introducing an aqueous solution having a pH of at most 8 from an inlet to said basic cellulosic biomass solids-containing vessel, thereby producing second washed cellulosic biomass solids having reduced detrimental species content compared to the detrimental species-containing cellulosic biomass solids and an basic water effluent; g. wherein the combined amount of said acidic water effluent and said basic water effluent is in the range of about 3 parts to about 0.5 parts relative to about 1 part of detrimental species-containing cellulosic biomass solids (dry basis) h. introducing a removal stream comprising a gas stream or an organic solvent solution from an inlet to the vessel containing the second washed cellulosic biomass solids thereby producing a pretreated cellulosic biomass solids with reduced water content compared to the second water washed cellulosic biomass solids and a second aqueous effluent; i. discharging the pretreated cellulosic biomass solids from an outlet and transferring at least a portion of the discharged pretreated biomass solids to a digestion and/or reaction zone; j. recycling at least a first portion of the aqueous effluent to produce acidic solution; k. recycling at least a first portion of the second aqueous effluent to produce base solution; and l. recycling at least a second portion of the aqueous effluent and at least a second portion of the second aqueous effluent as an aqueous solution. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 37)
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27. A method for selective removal of a detrimental metals and their anion species from a cellulosic biomass solids comprising:
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a. providing a detrimental species-containing cellulosic biomass solids; b. introducing said detrimental species-containing cellulosic biomass solids from an inlet into a treatment vessel, said cellulosic biomass solids having a true interstitial volume in said vessel; c. introducing a base solution having a pH of at least 9 from an inlet to said cellulosic biomass solids containing vessel at a temperature in the range of 0°
C. to 60°
C. in an amount to fill at least about 5% bed volume to at most about 40% bed volume of said true interstitial volume;d. subsequently to step c, introducing an aqueous solution having a pH of at most 8 from an inlet to said basic cellulosic biomass solids-containing vessel, thereby producing washed cellulosic biomass solids having reduced detrimental species content compared to the detrimental species-containing cellulosic biomass solids and an basic water effluent; e. introducing a base solution having a pH of at most 4 from an inlet to said washed cellulosic biomass solids containing vessel at a temperature in the range of 0°
C. to 60°
C. in an amount to fill at least about 5% bed volume to at most about 40% bed volume of said true interstitial volume;f. subsequently to step e, introducing an aqueous solution having a pH of at least 5 from an inlet to said basic cellulosic biomass solids-containing vessel, thereby producing second washed cellulosic biomass solids having reduced detrimental species content compared to the detrimental species-containing cellulosic biomass solids and an acidic water effluent; g. wherein the combined amount of said acidic water effluent and said basic water effluent is in the range of about 3 parts to about 0.5 parts relative to about 1 part of detrimental species-containing cellulosic biomass solids (dry basis) h. introducing a removal stream comprising a gas stream or an organic solvent solution from an inlet to the vessel containing the second washed cellulosic biomass solids thereby producing a pretreated cellulosic biomass solids with reduced water content compared to the second water washed cellulosic biomass solids and a second aqueous effluent; i. discharging the pretreated cellulosic biomass solids from an outlet and transferring at least a portion of the discharged pretreated biomass solids to a digestion and/or reaction zone; j. recycling at least a first portion of the aqueous effluent to produce base solution; k. recycling at least a first portion of the second aqueous effluent to produce acidic solution; and l. recycling at least a second portion of the aqueous effluent and at least a second portion of the second aqueous effluent as an aqueous solution. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 38)
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Specification