Hot gas desulfurization with sorbents containing mixed metal oxides
Advanced power generation systems such as the integrated gasification combined cycle power generators and the molten carbonate fuel cells have stringent fuel gas desulfurization requirements and process economics dictates that this desulfurization be performed near the temperature of the gasification off-gas. The most advanced hot gas desulfurization technology today is based on the zinc ferrite sorbent which has several shortcomings such as zinc loss by evaporation, and incomplete regeneration due to sulfate formation. The objective of this study is to develop an improved sorbent which can reduce H{sub 2}S levels to 1 ppmv or less, which can stabilize zinc, and produce economically recoverable amounts of elemental sulfur during regeneration. For this purpose, the desulfurization performance.of sorbents prepared by the addition of various amounts of V{sub 2}0{sub 5} to the zinc ferrite sorbent is investigated. Preliminary experiments show that the sorbent containing about 4.8 mass % vanadium shows a superior desulfurization performance compared to zinc ferrite. Addition of vanadium suppresses residual sulfate formation and possibly zinc evaporation. significant quantities of elemental sulfur were observed after the regeneration of vanadium containing sorbents.
- Research Organization:
- Hampton Univ., VA (United States). Dept. of Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-90PC90312
- OSTI ID:
- 10136330
- Report Number(s):
- CONF-921104-12; ON: DE93008212
- Resource Relation:
- Conference: American Institute of Chemical Engineers annual meeting,Miami, FL (United States),1-6 Nov 1992; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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Hot gas desulfurization with sorbents containing oxides of zinc, iron, vanadium and copper
Hot gas desulfurization with sorbents containing oxides of zinc, iron, vanadium and copper
Related Subjects
01 COAL, LIGNITE, AND PEAT
30 DIRECT ENERGY CONVERSION
COMBINED-CYCLE POWER PLANTS
COAL GASIFICATION
FUEL GAS
HOT GAS CLEANUP
MOLTEN CARBONATE FUEL CELLS
SPECIFICATIONS
ZINC COMPOUNDS
SORPTIVE PROPERTIES
DESULFURIZATION
FERRITES
OXIDES
VANADIUM OXIDES
HYDROGEN SULFIDES
REMOVAL
SULFUR
MATERIALS RECOVERY
REGENERATION
200102
010404
010402
300502
POWER CYCLES
GASIFICATION
PURIFICATION AND UPGRADING
PERFORMANCE AND TESTING