Bench-scale demonstration of hot-gas desulfurization technology. Quarterly technical progress report, April 1, 1994--June 30, 1994
Technical Report
·
OSTI ID:10189630
Hot-gas desulfurization research utilizing regenerable mixed-metal oxide sorbents which can reduce the sulfur in coal gas to less than 20 ppMv and can be regenerated in a cyclic manner with air for multicycle operation is described. Zinc titanate (Zn{sub 2}TiO{sub 4} or ZnTiO{sub 3}), formed by a solid-state reaction of zinc oxide (ZnO) and titanium dioxide (TiO{sub 2}), is currently one of the leading sorbents. Overall chemical reactions with Zn{sub 2}TiO{sub 4} during the desulfurization (sulfidation)-regeneration cycle are shown below: Sulfidation: Zn{sub 2}TiO{sub 4} + 2H{sub 2}S {yields} 2ZnS + TiO{sub 2} + 2H{sub 2}O and Regeneration: 2ZnS + TiO{sub 2} + 3O{sub 2} {yields} Zn{sub 2}TiO{sub 4} + 2SO{sub 2}. The goal of this project is to continue further development of the zinc titanate desulfurization and Direct Sulfur Recovery (DSRP) technologies by: Scaling UP the zinc titanate reactor system; developing an integrated skid-mounted zinc titanate desulfurization-DSRP reactor system; testing the integrated system over an extended period with real coal-gas from an operating gasifier to quantify the degradative effect, if any, of the trace contaminants present in coal gas; developing an engineering database suitable for system scaleup; and designing, fabricating and commissioning a larger DSRP reactor system capable of operating on a six-fold greater volume of gas than the DSRP reactor used in the bench-scale field test.
- Research Organization:
- Research Triangle Inst., Research Triangle Park, NC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC21-93MC30010
- OSTI ID:
- 10189630
- Report Number(s):
- DOE/MC/30010--3914; ON: DE95001481; BR: AA0510000
- Country of Publication:
- United States
- Language:
- English
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