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US 2003/0114296 A1Published application
Desulfurization with improved sorbent regeneration
AssigneeConocoPhillips Company
InventorsJason J. Gislason, Ronald E. Brown, Robert W. Morton, Glenn W. Dodwell
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Abstract
During regeneration of a sulfurized sorbent, the oxygen partial pressure in the regeneration zone is controlled to minimize sulfation of the sorbent.
Claims33
A process for regenerating a sorbent, said process comprising the steps of:
- (a) charging an oxygen-containing regeneration stream to a regeneration zone;
- (b) charging a sulfurized sorbent comprising a promoter metal and zinc sulfide to said regeneration zone;
- and
- (c) contacting said sulfurized sorbent with said regeneration stream in said regeneration zone under regeneration conditions sufficient to maintain an average oxygen partial pressure in said regeneration zone of less than about 2.0 psig.
1 more element
A process for regenerating and activating a sorbent, said process comprising the steps of:
- (a) contacting a sulfurized sorbent comprising zinc sulfide with an oxygen-containing stream in a regeneration zone under regeneration conditions sufficient to maintain an average oxygen partial pressure in said regeneration zone of less than about 2.0 psig, thereby providing a desulfurized sorbent;
- and
- (b) contacting said desulfurized sorbent with a reducing stream in an activation zone under activation conditions including a temperature which is more than about 300° F. and less than about 1000° F., thereby providing an activated sorbent.
A desulfurization process comprising the steps of:
- (a) contacting a sulfurized sorbent comprising a promoter metal and zinc sulfide with an oxygen-containing stream in a regeneration zone under regeneration conditions sufficient to convert at least a portion of said zinc sulfide to zinc oxide, thereby providing a desulfurized sorbent, said regeneration conditions including an average oxygen partial pressure of less than about 2.0 psig;
- (b) contacting at least a portion of said desulfurized sorbent with a hydrogen-containing stream in an activation zone under activation conditions sufficient to reduce the valence of said promoter metal, thereby providing an activated sorbent;
- and
- (c) contacting at least a portion of said activated sorbent with a sulfur-containing fluid comprising at least about 50 ppmw sulfur in a desulfurization zone under desulfurization conditions sufficient to provide a desulfurized fluid comprising less than about 50 weight percent of the amount of sulfur in said sulfur-containing fluid, wherein at least about 50 weight percent of said sulfur in said sulfur-containing fluid is present in the form of organosulfur compounds.
1 more element
Dependencies are inferred from the claim text.