Hydrocarbon fuel oil for use in fuel cell system
View Patent ↗Hydrocarbon fuel oil with paraffins as the main constituent for use in fuel cell systems is provided having (1) paraffins of less than 13 carbons constitute not less than 60% by mass; (2) isoparaffins of 15 or more carbons constitute from 0.01 to 9% by mass; and (3) normal paraffins of 13 or more carbons constitute not more than 2% by mass. Also, in addition to the aforementioned compositions (1) to (3), it is preferable if isoparaffins of 17 or more carbons constitute not more than 3% by mass.
1. A method of operating a fuel cell system containing a reforming apparatus, said method comprising:
(a) providng a hydrocarbon fuel oil with paraffins as the main constituent to the fuel cell system at an inlet temperature to the reforming apparatus of at least 310° C., said hydrocarbon fuel oil having:
(1) paraffins of less than 13 carbons constitute not less than 60% by mass;
(2) isoparaffins of 15 or more carbons constitute from 0.01 to 9% by mass; and
(3) normal paraffins of 13 or more carbons constitute not more than 2% by mass; and
(b) operating the fuel cell system.
2. The method of claim 1 wherein the isoparaffins of 15 or more carbons constitute from 1.8 to 9% by mass.
3. The method of claim 2 wherein the isoparaffins of 15 or more carbons constitute from 2 to 9% by mass.
4. The method of claim 1 wherein the isoparaffins of 15 or more carbons constitute not more than 7% by mass.
5. The method of claim 2 wherein the isoparaffins of 15 or more carbons constitute not more than 7% by mass.
6. The method of claim 3 wherein the isoparaffins of 15 or more carbons constitute not more than 7% by mass.
7. The method of claim 1 wherein the isoparaffins of 17 or more carbons constitute not more than 3% by mass.
8. The method of claim 2 wherein the isoparaffins of 17 or more carbons constitute not more than 3% by mass.
9. The hydrocarbon fuel oil method of claim 4 wherein the isoparaffins of 17 or more carbons constitute not more than 3% by mass.
10. The method of claim 1 wherein the paraffins of less than 13 carbons constitute not less than 70% by mass.
11. The method of claim 2 wherein the paraffins of less than 13 carbons constitute not less than 70% by mass.
12. The method of claim 4 wherein the paraffins of less than 13 carbons constitute not less than 70% by mass.
13. The method of claim 7 wherein the paraffins of less than 13 carbons constitute not less than 70% by mass.
14. The method of claim 10 wherein the paraffins of less than 13 carbons constitute not less than 75% by mass.
15. The method of claim 1 wherein the normal paraffins of 13 or more carbons constitute not more than 1% by mass.
16. The method of claim 2 wherein the normal paraffins of 13 or more carbons constitute not more than 1% by mass.
17. The method of claim 4 wherein the normal paraffins of 13 or more carbons constitute not more than 1% by mass.
18. The method of claim 7 wherein the normal paraffins of 13 or more carbons constitute not more than 1% by mass.
19. The method of claim 10 wherein the normal paraffins of 13 or more carbons constitute not more than 1% by mass.
20. The method of claim 14 wherein the normal paraffins of 13 or more carbons constitute not more than 1% by mass.
21. The method of claim 15 wherein the normal paraffins of 13 or more carbons constitute not more than 0.5% by mass.
22. The method of claim 1 wherein paraffins of 7 carbons or less constitute less than 1% by mass.
23. The method of claim 1 wherein the hydrocarbon fuel oil has the total amount of n-paraffins is up to 37.48% by mass.