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US 2010/0062925 A1Published application
Method of inhibiting in situ silicate formation in desulfurization sorbents
AssigneeChina Petroleum & Chemical Corporation
InventorsRobert W. Morton, Roland Schmidt, Glenn W. Dodwell, Gregory C. Allred
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Abstract
A method for regenerating desulfurization sorbents that minimizes the in situ formation of one or more silicates. It has been discovered that regenerating sulfur-laden sorbent particles in a carbon oxide-rich environment unexpectedly reduces the in situ silicate formation rate, as compared to similar sorbents regenerated using conventional methods.
Claims41
A process for regenerating a plurality of sorbent particles, said process comprising:
- (a) introducing a plurality of sulfur-laden sorbent particles into a regeneration zone, wherein said sulfur-laden sorbent particles comprise a support component that comprises a silica source;
- (b) introducing one or more gas streams into said regeneration zone, wherein said one or more gas streams comprise oxygen and carbon oxide;
- and
- (c) regenerating at least a portion of said sulfur-laden sorbent particles in said regeneration zone under regeneration conditions to thereby provide a plurality of regenerated sorbent particles,
- wherein the total molar ratio of carbon oxide to oxygen in said one or more gas streams is greater than about 0.01:1.
2 more elements
A desulfurization process comprising:
- (a) contacting a plurality of initial sorbent particles with a sulfur-containing hydrocarbon stream in a fluidized bed desulfurization reactor under desulfurization conditions to thereby provide a sulfur-depleted hydrocarbon stream and a plurality of sulfur-laden sorbent particles;
- (b) contacting at least a portion of said sulfur-laden sorbent particles with a regeneration gas in a regeneration zone under regeneration conditions to thereby provide a plurality of regenerated sorbent particles;
- and
- (c) contacting at least a portion of said regenerated sorbent particles with a reduction agent in a reduction zone under reducing conditions to thereby provide a plurality of reduced sorbent particles,
- wherein said regeneration conditions include a carbon dioxide partial pressure greater than 1.25 psig.
2 more elements
Dependencies are inferred from the claim text.