Claims
- 1. A composition comprising natural gas and dimethyl ether.
- 2. The composition of claim 1 wherein the natural gas is a lean natural gas.
- 3. The composition of claim 2 wherein the lean natural gas comprises less than about 3 mol % of C2 to C5 hydrocarbons with the balance of the hydrocarbons in the lean natural gas being essentially methane, based on the total composition.
- 4. The composition of claim 1 wherein dimethyl ether is present in an amount of less than 25 mol % based on the total composition.
- 5. The composition of claim 1 wherein dimethyl ether is present in an amount of less than 20 mol % based on the total composition.
- 6. The composition of claim 1 wherein dimethyl ether is present in an amount of from 10 mol % to 15 mol % based on the total composition.
- 7. The composition of claim 1 wherein the natural gas is derived from a regasified LNG product produced in an LNG process.
- 8. The composition of claim 1 having a heating value of from about 1000 BTU/scf to about 1200 BTU/scf.
- 9. The composition of claim 1 having a heating value of from about 1030 BTU/scf to about 1170 BTU/scf.
- 10. The composition of claim 1 having a heating value of from about 1050 BTU/scf to about 1150 BTU/scf.
- 11. A method for preparing a fuel blend comprising natural gas and dimethyl ether, the method comprising mixing a natural gas component and dimethyl ether.
- 12. The method of claim 11 wherein the natural gas component is derived from a regasified LNG product prepared in a LNG process.
- 13. The method of claim 12 further comprising:
pre-treating a natural gas stream comprising acid gases, water and other contaminants therein to remove at least a portion of the contaminants therefrom and provide a natural gas feed; cooling the natural gas feed in the LNG process to liquefy at least a portion of the natural gas component and thereby produce a LNG product; and re-gasifying the LNG product to obtain the natural gas component.
- 14. The method of claim 13 further comprising:
providing dimethyl ether; and mixing the dimethyl ether with the natural gas component to obtain the fuel blend.
- 15. The method of claim 14 wherein mixing of the natural gas component and dimethyl ether occurs at a site remote from the location where the natural gas stream originates.
- 16. The method of claim 12 wherein the dimethyl ether is blended in an amount such that the concentration of dimethyl ether in the fuel blend is less than 25 mol % based on the total fuel blend.
- 17. The method of claim 12 wherein the dimethyl ether is blended in an amount such that the concentration of dimethyl ether in the fuel blend is less than 20 mol % based on the total fuel blend.
- 18. The method of claim 12 wherein the dimethyl ether is blended in an amount such that the concentration of dimethyl ether in the fuel blend is from 10 mol % to 15 mol % based on the total fuel blend.
- 19. The method of claim 12 wherein the fuel blend has a heating value of from about 1000 BTU/scf to about 1200 BTU/scf.
- 20. The method of claim 12 wherein the fuel blend has a heating value of from about 1030 BTU/scf to about 1170 BTU/scf.
- 21. The method of claim 12 wherein the fuel blend has a heating value of from about 1050 BTU/scf to about 1150 BTU/scf.
- 22. The method of claim 11 further comprising:
pre-treating a natural gas stream comprising acid gases, water and other contaminants therein to remove at least a portion of the contaminants therefrom and provide a natural gas feed for a LNG process; mixing the dimethyl ether into the natural gas feed within a LNG process at a temperature above −220° F. (−140° C.) and in an amount such that the dimethyl ether does not solidify and form a separate solid phase during liquefaction of the natural gas feed in the LNG process; and cooling the resulting natural gas and dimethyl ether mixture within the LNG process to a temperature of from about −240° F. (−151° C.) to about −260° F. (−162° C.) or less so as to liquefy at least a portion of the mixture and thereby produce a blended liquid product at substantially atmospheric pressure; and re-gasifying the blended liquid product to produce the fuel blend.
- 23. The method of claim 22 wherein the fuel blend comprises dimethyl ether in an amount of 5 mole % or less based on the total fuel blend.
- 24. A method for preparing a fuel blend comprising natural gas and dimethyl ether, the method comprising:
pre-treating a natural gas stream comprising acid gases, water and other contaminants therein to remove at least a portion of the contaminants therefrom and provide a natural gas feed; cooling the natural gas feed in a LNG process to liquefy at least a portion of the natural gas component and thereby produce a LNG product; providing dimethyl ether; re-gasifying the LNG product to obtain the natural gas component; and mixing the dimethyl ether with the natural gas component to obtain the fuel blend.
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims benefit of U.S. Provisional Application Ser. No. 60/458,213, filed Mar. 27, 2003, the teachings of which are incorporated herein by reference in their entirety.
[0002] Filed concurrently on even date herewith is the application entitled “Integrated Processing of Natural Gas Into Liquid Products”, Attorney's Docket No. 37,488-00, which claims benefit from U.S. Provisional Application Ser. No. 60/458,005, filed Mar. 27, 2003. The teachings of these applications are also incorporated herein by reference.
Provisional Applications (1)
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Number |
Date |
Country |
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60458213 |
Mar 2003 |
US |