Method to remove sulfur or sulfur-containing species from a source
View Patent ↗High surface area iron oxides that can be ferroxane-derived iron oxides are described, as well as methods of using the same to remove at least a portion of one or more sulfur-containing species from a gas stream or liquid stream.
1. A method to remove at least a portion of one or more sulfur-containing species from a gas stream or liquid stream comprising contacting said gas stream or liquid stream with an iron oxide comprising ferroxane-derived crystalline Fe 2 O 3 having a specific surface area of 10 m 2 /g or greater, and wherein said at least a portion of one or more sulfur-containing species is retained on said ferroxane-derived crystalline Fe 2 O 3 .
2. The method of claim 1 , wherein said specific surface area is from about 10 m 2 /g to about 80 m 2 /g.
3. The method of claim 1 , wherein said iron oxide has an average particle size of from about 5 microns to about 20 microns.
4. The method of claim 1 , wherein said iron oxide has an average particle size of from about 10 microns to about 15 microns.
5. The method of claim 1 , wherein said iron oxide has an average particle size of from about 7 microns to about 15 microns.
6. The method of claim 1 , wherein said iron oxide has particle sizes and wherein at least 90% of said particle sizes are in a range of from about 1 micron to about 40 microns.
7. The method of claim 1 , wherein said iron oxide has particle sizes and wherein at least 90% of said particle sizes are in a range of from about 1 micron to about 30 microns.
8. The method of claim 1 , wherein at least one or more sulfur-containing species are removed from a gas stream and said gas stream comprises natural gas, synthesis gas, methane, coal gas, propane, or any combinations thereof.
9. The method of claim 1 , wherein one or more sulfur-containing species are removed from a liquid stream, wherein said liquid stream is a hydrocarbon stream.
10. The method of claim 1 , wherein one or more sulfur-containing species are removed from a liquid stream, wherein said liquid stream is gasoline or diesel fuel.
11. The method of claim 1 , wherein one or more sulfur-containing species are removed from a liquid stream, wherein said liquid stream is water.
12. The method of claim 1 , wherein said iron oxide is on at least one support.
13. The method of claim 12 , wherein said support is a fixed support.
14. The method of claim 12 , wherein said support is a template scaffolding.
15. The method of claim 1 , wherein said material is present as a bed of material.
16. The method of claim 12 , wherein said support is a plurality of supports.
17. The method of claim 1 , wherein said method is conducted in at least two vessels, wherein said vessels are alternatively operated.
18. The method of claim 1 , wherein said sulfur-containing species comprises H 2 S.
19. The method of claim 1 , wherein said sulfur-containing species comprises H 2 S, a thiol, a thiolfuran, or any combination thereof.
20. The method of claim 1 , wherein said sulfur-containing species comprises SO x , a sulfite, a disulfite, an organic sulfur compound, or any combination thereof.
21. The method of claim 1 , further comprising converting a ferroxane to a ferric oxide prior to contacting said gas stream or liquid stream with said ferric oxide.
22. The method of claim 21 , wherein said ferroxane has a formula Fe(O) a (OH) b (X) c wherein X is a chemically reactive substituent, and a, b, and c are positive integers or fractions in the range of from 0 to 3.
23. The method of claim 21 , wherein said ferroxane is converted to a ferric oxide by heat treating the ferroxane.