DSRP, Direct Sulfur Production

Conference · Sun Aug 01 00:00:00 EDT 1993

OSTI ID:10183341

Gangwal, S K; McMichael, W J; Agarwal, S K; Jang, B L; Howe, G B ^[1]; Chen, D H; Hopper, J R ^[2]

---

1. Research Triangle Inst., Research Triangle Park, NC (United States)
2. Lamar Univ., Beaumont, TX (United States)

Hot-gas desulfurization processes for IGCC and other advanced power applications utilize regenerable mixed-metal oxide sorbents to remove hydrogen sulfide (H{sub 2}S) from raw coal gas. Regeneration of these sorbents produces an off-gas typically containing I to 3 percent sulfur dioxide (SO{sub 2}). Production of elemental sulfur is a highly desirable option for the ultimate disposal of the SO{sub 2} content of this off-gas. Elemental sulfur, an essential industrial commodity, is easily stored and transported. As shown in Figure 1, the DSRP consists of two catalytic reactors, each followed by a sulfur condenser. Hot regenerator off-gas is mixed with a hot coal-gas slip stream and fed to the first DSRP reactor. Approximately 95 percent of the sulfur gas in the inlet stream of the first reactor is converted to elemental sulfur. The outlet gas of the first DSRP reactor is cooled, condensing out sulfur. The gas could be recycled after the Stage I condenser. Alteratively, by adjusting the proportion of coal gas to regenerator off-gas, the effluent composition of the first reactor can be controlled to produce an H{sub 2}S-to-SO{sub 2} ratio of 2 to 1 at 95 percent sulfur conversion. The cooled gas stream is then passed to the second DSRP reactor where 80 to 90 percent of the remaining sulfur compounds are converted to elemental sulfur via the modified Claus reaction at high pressure. The total efficiency of the two reactors for the conversion of sulfur compounds to elemental sulfur is projected to be about 99.5 percent.

• Research Organization: Research Triangle Inst., Research Triangle Park, NC (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC21-90MC27224
• OSTI ID: 10183341
• Report Number(s): DOE/MC/27224-93/C0199; CONF-9306148-4; ON: DE93019292
• Resource Relation: Conference: Coal-fired power systems `93: advances in IGCC and PFBC review meeting,Morgantown, WV (United States),28-30 Jun 1993; Other Information: PBD: [1993]
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
01 COAL, LIGNITE, AND PEAT
COMBINED-CYCLE POWER PLANTS
COAL GASIFICATION
COAL GAS
HOT GAS CLEANUP
ADSORBENTS
REGENERATION
HYDROGEN SULFIDES
MATERIALS RECOVERY
SULFUR
PRODUCTION
CLAUS PROCESS
REDUCTION
CHEMICAL REACTORS
CATALYSTS
360601
010402
010404
PREPARATION AND MANUFACTURE
PURIFICATION AND UPGRADING
GASIFICATION