Advanced Sulfur Control Processing

Technical Report · Tue Dec 31 04:00:00 EST 1996

DOI:https://doi.org/10.2172/419969· OSTI ID:419969

Gangwal, S K; Portzer, J W; Turk, B S; Gupta, R ^[1]

---

1. Research Triangle Inst., Research Triangle Park, NC (United States)

The primary objective of this project is to determine the feasibility of an alternate concept for the regeneration of high temperature desulfurization sorbents in which elemental sulfur, instead of SO{sub 2}, is produced. If successful, this concept will eliminate or alleviate problems caused by the highly exothermic nature of the regeneration reaction, the tendency for metal sulfate formation, and the need to treat the regeneration off-gas to prevent atmospheric SO{sub 2}, emissions. Iron and cerium-based sorbents were chosen on the basis of thermodynamic analysis to determine the feasibility of elemental sulfur production. The ability of both to remove H{sub 2}S during the sulfidation phase is less than that of zinc-based sorbents, and a two-stage desulfurization process will likely be required. Preliminary experimental work used electrobalance reactors to compare the relative rates of reaction of O{sub 2} and H{sub 2}O with FeS. More detailed studies of the regeneration of FeS as well as the sulfidation of CeO{sub 2} and regeneration of Ce{sub 2}O{sub 2}S are being carried out in a laboratory-scale fixed-bed reactor equipped with a unique analytical system which permits semi-continuous analysis of the distribution of elemental sulfur, H{sub 2}S, and SO{sub 2} in the reaction product gas.

• Research Organization: USDOE Morgantown Energy Technology Center, WV (United States)
• Sponsoring Organization: USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)
• DOE Contract Number: AC21-94MC30012
• OSTI ID: 419969
• Report Number(s): DOE/MC/30012--97/C0728; CONF-960757--21; ON: DE97051025
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CERIUM OXIDES
COAL GAS
DESULFURIZATION
EXPERIMENTAL DATA
HYDROGEN SULFIDES
IRON OXIDES
MATERIALS RECOVERY
REGENERATION
REMOVAL
SORBENT RECOVERY SYSTEMS
SULFIDATION
SULFUR