Production of renewable bio-gasoline
View Patent ↗A process and system for separating bio-gasoline, bio-diesel and bio-fuel oil fractions from a bio-oil, and for producing a renewable gasoline including at least in part the bio-gasoline fraction, is provided. The process comprises separating bio-oil into a bio-gasoline fraction and a heavy fraction based on their boiling points. At least a portion of the bio-gasoline fraction is directly blended with a petroleum-derived gasoline, without any prior hydrotreatment, to thereby provide a renewable gasoline composition.
1. A process for producing a bio-gasoline fraction, said process comprising:
(a) converting biomass in a conversion reactor containing a catalyst to thereby produce a conversion reactor effluent comprising vapor conversion products;
(b) condensing at least a portion of said vapor conversion products to thereby provide a bio-oil having a total oxygen content of less than 15 weight percent; and
(c) separating said bio-oil by distillation into at least a bio-gasoline fraction and a heavy fraction, wherein at least 75 weight percent of said bio-gasoline fraction has a boiling point less than 205° C., and wherein at least 75 weight percent of said heavy fraction has a boiling point greater than 205° C.
2. The process of claim 1 wherein said bio-oil has a total oxygen content of less than 15 weight percent; and wherein at least 85 weight percent of said bio-gasoline fraction has a boiling point less than 205° C., and wherein at least 85 weight percent of said heavy fraction has a boiling point greater than 205° C.
3. The process of claim 1 wherein at least 5 weight percent of said bio-oil subjected to said separating of step (c) is separated into said bio-gasoline fraction.
4. The process of claim 1 wherein said separating of step (c) is accomplished by fractional distillation.
5. The process of claim 1 wherein said separating of step (c) further provides separation of a bio-diesel fraction from said heavy fraction, and wherein at least 75 weight percent of said bio-diesel fraction has a boiling point between 205° C. and 325° C.
6. The process of claim 5 wherein at least 5 weight percent of said bio-oil subjected to said separating of step (c) is separated into said bio-diesel fraction.
7. The process of claim 1 wherein said separating of step (c) further provides separation of a bio-fuel oil fraction from said heavy fraction, and wherein at least 75 weight percent of said bio-fuel oil fraction has a boiling point greater than 325° C.
8. The process of claim 7 wherein less than 60 weight percent of said bio-oil subjected to said separating of step (b) is separated into said bio-fuel oil fraction.
9. The process of claim 1 wherein said bio-oil is not subjected to additional deoxygenation between said converting of step (a) and said separating of step (c).
10. The process of claim 1 wherein said bio-gasoline fraction comprises phenolic compounds in an amount of at least 5 percent by weight.
11. The process of claim 1 wherein said bio-gasoline fraction comprises hydrocarbon compounds and oxygen-and-carbon-containing compounds, wherein the cumulative amount of aliphatic and aromatic hydrocarbons in said bio-gasoline fraction is at least 5 weight percent, wherein the amount of said oxygen-and-carbon-containing compounds in said bio-gasoline fraction is at least 15 weight percent, wherein said oxygen-and-carbon-containing compounds are selected from the group consisting of phenolics, furans, ketones, aldehydes, and mixtures thereof.
12. A process for producing a renewable gasoline composition, said process comprising:
(a) separating a bio-oil into at least a bio-gasoline fraction and a heavy fraction, wherein at least 75 weight percent of said bio-gasoline fraction has a boiling point less than 205° C., wherein at least 75 weight percent of said heavy fraction has a boiling point greater than 205° C., wherein said bio-oil has not previously been subjected to an oxygen-removing hydrotreatment step, wherein said bio-oil has a total oxygen content of less than 15 weight percent; and
(b) combining at least a portion of said bio-gasoline fraction with a petroleum-derived gasoline to thereby produce a renewable gasoline composition, wherein said renewable gasoline composition comprises said petroleum-derived gasoline in an amount of at least 80 weight percent and said bio-gasoline fraction in an amount greater than 0.1 and less than 20 weight percent.
13. The process of claim 12 wherein said petroleum-derived gasoline comprises hydrocarbons having between 5 and 12 carbon atoms per molecule.
14. The process of claim 12 wherein at least 5 weight percent of said bio-oil subjected to said separating of step (a) is separated into said bio-gasoline fraction.
15. The process of claim 12 wherein said bio-oil results from the thermochemical conversion of biomass in the presence of a catalyst.
16. The process of claim 12 wherein said bio-gasoline fraction comprises phenolic compounds in an amount of at least 5 percent by weight.
17. The process of claim 12 wherein said bio-gasoline fraction comprises hydrocarbon compounds and oxygen-and-carbon-containing compounds, wherein the cumulative amount of aliphatic and aromatic hydrocarbons in said bio-gasoline fraction is at least 5 weight percent, wherein the amount of oxygen-and-carbon-containing compounds in said bio-gasoline fraction is at least 15 weight percent, wherein said oxygen-and-carbon-containing compounds are selected from the group consisting of phenolics, furans, ketones, aldehydes, and mixtures thereof.
18. The process of claim 17 wherein the Anti-Knock Index (AKI) for said renewable gasoline composition increases by 0.3 to 0.45 AKI numbers, as compared to the AKI of said petroleum-derived gasoline, for each one volume % increase in concentration of said bio-gasoline fraction in said renewable gasoline composition, based on the total volume of said renewable gasoline composition.
19. The process of claim 12 wherein said renewable gasoline composition comprises at least 0.5 weight percent phenolics, and at least 50 ppmw carbonyls.
20. The process of claim 12 wherein said renewable gasoline composition has a copper corrosion test maximum value of No. 1.
21. The process of claim 12 wherein said bio-gasoline fraction is fully miscible with said petroleum-derived gasoline.
22. The process of claim 1 , wherein said bio-gasoline fraction comprises:
(i) a total oxygen content of less than 15 weight percent, and
(ii) phenolic compounds in an amount of at least 10 percent by weight.
23. The process of claim 12 , wherein said bio-gasoline fraction comprises:
(i) a total oxygen content of less than 15 weight percent, and
(ii) phenolic compounds in an amount of at least 10 percent by weight.