Aviation fuel composition
AssigneeShell USA, Inc.
InventorsGriffin Michael VALENTICH, Elise Marie MINER
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Abstract
This invention provides an aviation fuel composition comprising: a cycloparaffinic kerosene generated from hydropyrolysis and hydroconversion of a solid biomass containing lignocellulose, wherein the cycloparaffinic kerosene comprises at least 90 vol % cycloparaffins and less than 1 vol % aromatics; a paraffinic-based kerosene comprising normal and iso-paraffins in an amount of greater than 95%; and optionally, a petroleum-derived kerosene. The aviation fuel composition of the present invention provides an environmentally-friendly fuel while providing improved lubricity and low temperature viscosity properties.
Claims17
An aviation fuel composition comprising:
- a cycloparaffinic kerosene generated from hydropyrolysis and hydroconversion of a solid biomass containing lignocellulose, wherein the cycloparaffinic kerosene comprises at least 90 vol % cycloparaffins and less than 1 vol % aromatics:
- a paraffinic-based kerosene comprising normal and iso-paraffins in an amount of greater than 95 vol %;
- and
- optionally, a petroleum-derived kerosene.
An aviation fuel composition according to clam 1 wherein the aviation fuel composition comprises from 10 vol % to 95 vol % of cycloparaffinic kerosene and from 1 vol % to 80 vol % of paraffinic kerosene, based on the total aviation fuel composition.
A process for producing an aviation fuel composition comprising:
- feeding a solid feedstock and hydrogen to a first stage hydropyrolysis reactor, wherein the first stage hydropyrolysis reactor comprises one or more deoxygenation catalyst, and wherein the solid feedstock comprises biomass containing lignocellulose;
- hydropyrolysing the solid feedstock in the first stage hydropyrolysis reactor to generate a product stream comprising partially deoxygenated hydropyrolysis product, H2O, H2, CO2, CO, C1-C3 gases, char and catalyst fines;
- feeding at least a portion of the product stream to a second stage hydroconversion reactor comprising one or more hydroconversion catalyst;
- hydroconverting the partially deoxygenated hydropyrolysis product in the product stream to generate a vapor phase product comprising substantially fully deoxygenated hydrocarbon product, H2O, CO, CO2, and C1-C3 gases;
- condensing the vapor phase product to generate a deoxygenated hydrocarbon liquid comprising the substantially fully deoxygenated hydrocarbon product, wherein the substantially fully deoxygenated hydrocarbon product comprises a cycloparaffinic kerosene wherein the cycloparaffinic kerosene comprises at least 90 vol % cycloparaffins and less than 1 vol % aromatics;
- and
- mixing the cycloparaffinic kerosene with a paraffinic-based kerosene comprising normal and iso-paraffins in an amount of greater than 95 vol % and a petroleum derived jet fuel to generate the aviation fuel composition.
A process for producing an aviation fuel composition, comprising:
- mixing a cycloparaffinic kerosene derived from hydropyrolysis and hydroconversion of a biomass containing lignocellulose wherein the cycloparaffinic kerosene comprises at least 90 vol % cycloparaffins and less than 1 vol % aromatics with a paraffinic-based kerosene comprising normal and iso-paraffins in an amount of greater than 95 vol %, and optionally, a petroleum-derived jet fuel.
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A method for improving the lubricity of an aviation fuel composition comprising the steps of:
- blending:
- a cycloparaffinic kerosene generated from hydropyrolysis and hydroconversion of a solid biomass containing lignocellulose, wherein the cycloparaffinic kerosene comprises at least 90 vol % cycloparaffins and less than 1 vol % aromatics;
- and
- a paraffinic-based kerosene comprising normal and iso-paraffins in an amount of greater than 95 vol %;
- to produce an aviation fuel composition, and
- measuring the lubricity of the aviation fuel composition according to ASTM D5001.
A method for improving the low temperature viscosity of an aviation fuel composition comprising the steps of:
- blending:
- a cycloparaffinic kerosene generated from hydropyrolysis and hydroconversion of a solid biomass containing lignocellulose, wherein the cycloparaffinic kerosene comprises at least 90 vol % cycloparaffins and less than 1 vol % aromatics;
- and
- a paraffinic-based kerosene comprising normal and iso-paraffins in an amount of greater than 95 vol %;
- to produce an aviation fuel composition, and
- measuring the low temperature viscosity of the aviation fuel composition according to ASTM D7945.
Dependencies are inferred from the claim text.