Refinery gas processing method
A process for hydrogen recovery from refinery gas system comprising supplying the refinery gas to an inlet manifold fluidly coupled to a conditioning stage, the conditioning stage comprising a reactor having a reforming catalyst deposited on an ultra-short-channel-length metal substrate; supplying oxidant to the conditioning stage via the inlet manifold; supplying steam from a steam generator to the conditioning stage via the inlet , manifold; reacting the refinery gas in the conditioning stage; and discharging a product through a discharge outlet fluidly coupled to the conditioning stage, the discharge outlet configured to flow the product for use by a downstream reformer. The process allows to either increase the H2 production rate or lower the firing rate while maintaining a constant H2 production rate for the downstream steam reformer, independent of the feed compositional variability of the refinery or still gas.
1. A refinery gas system for hydrogen recovery comprising:
a conditioning stage fluidly coupled to an inlet manifold, said conditioning stage comprising a reactor having a reforming catalyst deposited on an ultra-short-channel-length substrate;
an oxidant stream fluidly coupled to said conditioning stage via said inlet manifold upstream of said conditioning stage;
a steam generator fluidly coupled to said conditioning stage via said inlet manifold upstream of said conditioning stage;
at least one process gas supply fluidly coupled upstream of said conditioning stage via said inlet manifold; and
a discharge outlet fluidly coupled to said conditioning stage, the discharge outlet configured to flow a product for gas phase desulfurization and subsequently for use by a downstream reformer.
2. The refinery gas system for hydrogen recovery according to claim 1 , wherein said reforming catalyst comprising an Rh-based catalyst.
3. The refinery gas system for hydrogen recovery according to claim 1 , wherein said conditioning stage is configured for the refinery gas processing at space velocities as high as 175,000 hr −1 .
4. The refinery gas system for hydrogen recovery according to claim 1 , wherein said conditioning stage is configured for processing refinery gas comprising up to about 19 volume percent olefins in an oxidative mode in the absence of a dilution or a recycle.
5. The refinery gas system for hydrogen recovery according to claim 1 , wherein said feed gas comprises a still gas composition.
6. The refinery gas system for hydrogen recovery according to claim 1 , wherein said reforming catalyst deposited on the ultra-short-channel-length metal substrate configured to operate up to 1000 degrees Centigrade.
7. The refinery gas system for hydrogen recovery according to claim 1 , wherein non-sulfided reforming catalyst is deposited on the ultra-short-channel-length metal substrate.
8. The refinery gas system for hydrogen recovery according to claim 1 , wherein said reforming catalyst deposited on the ultra-short-channel-length metal substrate that is configured to perform a complete conversion of an organic sulfur species present in the refinery gas.
9. A process for hydrogen recovery from refinery gas system comprising:
supplying the refinery gas to an inlet manifold fluidly coupled to a conditioning stage, said conditioning stage comprising a reactor having a reforming catalyst deposited on an ultra-short-channel-length metal substrate;
supplying oxidant to said conditioning stage via said inlet manifold;
supplying steam from a steam generator to said conditioning stage via said inlet manifold;
reacting said refinery gas in said conditioning stage; and
discharging a product through a discharge outlet fluidly coupled to said conditioning stage, the discharge outlet configured to flow the product to a downstream gas phase desulfurizer followed by for use by a downstream reformer.
10. The process of claim 9 , further comprising:
processing at space velocities as high as 175,000 hr −1 through said conditioning stage.
11. The process of claim 9 , further comprising:
processing of feed gas comprising up to about 19 volume percent olefins in an oxidative mode in the absence of a dilution or a recycle through said conditioning stage.
12. The process of claim 9 , further comprising:
performing a complete conversion of an organic sulfur present in the refinery gas feed on said reforming catalyst deposited on the ultra-short-channel-length metal substrate.
13. The process of claim 9 , further comprising:
reacting said refinery gas in said conditioning stage up to 1000 degrees Centigrade.
14. The process of claim 9 , further comprising:
performing selective reduction of olefins in the refinery gas to less than 1.0 volume percent in the product.
15. The process of claim 9 , wherein said reforming catalyst comprises an Rh-based catalyst.
16. The process of claim 9 , supplying oxidant to the conditioning stage via the inlet manifold includes an O/C ratio of 0.25-0.75. The quantity of oxidant relative to quantity of refinery/still gas fed to the conditioning stage is best described by an O/C ratio, wherein “O” represents the moles of oxygen present in the oxidant and “C” represents the moles of carbon present in the refinery/still gas fed to the conditioning stage.
17. The process of claim 9 , wherein supplying steam from a steam generator to said conditioning stage via said inlet manifold includes a steam-to-carbon ratio of 0.5-1.0.
18. The process of claim 9 , further comprising:
operating at pressure compatible with the downstream steam reformer of up to 300 psia.