Bio-oil production with optimal byproduct processing
First Claim
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1. A process for producing bio-oil and processing byproducts of bio-oil production, said process comprising:
- (a) pyrolyzing biomass in a conversion reactor in the presence of a catalyst to thereby produce a reactor effluent comprising bio-oil, carbon monoxide (CO), and methane, wherein the weight ratio of said CO to said bio-oil in said reactor effluent is at least 0.5;
1, wherein the weight ratio of said methane to said bio-oil in said reactor effluent is at least 0.05;
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(b) condensing and separating a substantial portion of said bio-oil from said reactor effluent, thereby leaving an uncondensed stream comprising at least a portion of said methane and at least a portion of said CO; and
(c) generating hydrogen by reacting water with at least a portion of said CO and/or at least a portion of said methane, thereby producing a hydrogen-enriched stream comprising generated hydrogen, wherein said process produces said generated hydrogen at a rate that is at least 0.5 percent of the rate of introduction of said biomass into said conversion reactor on a weight basis.
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Abstract
A process and system for the conversion of biomass under high severity in the presence of a catalyst to produce a bio-oil, olefins, methane, and carbon monoxide (CO). The methane and/or CO can be used to generate hydrogen and the generated hydrogen can be used for hydrotreating the bio-oil. Additionally, or alternatively, a syngas stream, a carbon dioxide-rich stream, and/or a methane-rich stream can be recovered for use in the bio-oil production process and/or for use in a conventional petroleum refinery and/or petrochemical plant.
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Citations
39 Claims
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1. A process for producing bio-oil and processing byproducts of bio-oil production, said process comprising:
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(a) pyrolyzing biomass in a conversion reactor in the presence of a catalyst to thereby produce a reactor effluent comprising bio-oil, carbon monoxide (CO), and methane, wherein the weight ratio of said CO to said bio-oil in said reactor effluent is at least 0.5;
1, wherein the weight ratio of said methane to said bio-oil in said reactor effluent is at least 0.05;
1;(b) condensing and separating a substantial portion of said bio-oil from said reactor effluent, thereby leaving an uncondensed stream comprising at least a portion of said methane and at least a portion of said CO; and (c) generating hydrogen by reacting water with at least a portion of said CO and/or at least a portion of said methane, thereby producing a hydrogen-enriched stream comprising generated hydrogen, wherein said process produces said generated hydrogen at a rate that is at least 0.5 percent of the rate of introduction of said biomass into said conversion reactor on a weight basis. - 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)
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26. A process for producing bio-oil and processing byproducts of bio-oil production, said process comprising:
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(a) pyrolyzing biomass in a riser reactor in the presence of a catalyst to thereby produce a reactor effluent comprising bio-oil, carbon monoxide (CO), olefins, and methane, wherein the weight ratio of said CO to said bio-oil in said reactor effluent is at least 0.5;
1, wherein the weight ratio of said olefins to said bio-oil in said reactor effluent is at least 0.1;
1, wherein the weight ratio of said methane to said bio-oil in said reactor effluent is at least 0.05;
1;(b) condensing and separating a substantial portion of said bio-oil from said reactor effluent, thereby leaving an uncondensed stream comprising at least a portion of said methane and at least a portion of said CO; and (c) generating hydrogen from at least a portion of said uncondensed stream to thereby produce a hydrogen-enriched stream comprising generated hydrogen; (d) recovering from at least a portion of said hydrogen-enriched stream at least one of the following recovered streams; (i) a syngas stream comprising hydrogen and at least a portion of said CO, wherein said hydrogen and said CO make up at least 75 weight percent of said syngas stream, (ii) a hydrogen-rich stream, wherein hydrogen makes up at least 75 weight percent of said hydrogen-rich stream, (iii) a carbon dioxide-rich stream comprising at least 75 weight percent carbon dioxide (CO2), or (iv) a methane-rich stream, wherein said methane makes up at least 75 weight percent of said methane-rich stream, wherein when said syngas stream is recovered in step (d) said process produces said syngas stream at a rate that is at least 5 percent of the rate of introduction of said biomass into said conversion reactor on a weight basis, wherein when said hydrogen-rich stream is recovered in step (d) said process produces said hydrogen-rich stream at a rate that is at least 0.5 percent of the rate of introduction of said biomass into said conversion reactor on a weight basis, wherein when said CO2-rich stream is recovered in step (d) said process produces said CO2-rich stream at a rate that is at least 5 percent of the rate of introduction of said biomass into said conversion reactor on a weight basis, wherein when said methane-rich stream is recovered in step (d) said process produces said methane-rich stream at a rate that is at least 0.5 percent of the rate of introduction of said biomass into said conversion reactor on a weight basis. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A system for producing bio-oil, said system comprising:
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a biomass feedstock source for providing solid particulate biomass; a conversion reactor for thermally converting at least a portion of said solid particulate biomass feedstock into a reactor effluent comprising bio-oil, carbon monoxide (CO), olefins, and methane; a partial condenser for partially condensing at least a portion of said reactor effluent into a bio-oil stream and an uncondensed stream; an olefin removal unit for removing olefins from said uncondensed stream thereby providing an olefin-depleted stream; a hydrogen generation unit having a water inlet, wherein said hydrogen generation unit is operable to generate hydrogen by reacting water with CO and/or methane from said olefin-depleted stream; and a hydrotreater for reacting at least a portion of said bio-oil stream with at least a portion of the generated hydrogen from said hydrogen generation unit. - View Dependent Claims (37, 38, 39)
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Specification