Desulfurization of hot fuel gas produced from high-chlorine Illinois coals. Technical report, March 1, 1992--May 31, 1992

Technical Report · Thu Oct 01 04:00:00 EDT 1992

DOI:https://doi.org/10.2172/10185608· OSTI ID:10185608

O`Brien, W S ^[1]; Gupta, R P ^[2]

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1. Southern Illinois Univ., Carbondale, IL (United States)
2. Research Triangle Inst., Durham, NC (United States)

New coal gasification processes are now being developed which can generate electricity with high thermal efficiency either in an integrated gasification combined cycle (IGCC) or in a fuel cell (MCFC). Both of these new coal-to-electricity pathways require that the coal-derived fuel gas be at a high temperature and be free of potential pollutants, such as sulfur compounds. Unfortunately, some high-sulfur Illinois coals also contain significant chlorine which converts into hydrogen chloride (HCl) in the coal-gas. This project investigates the effect of HCl, in concentrations typical of a gasifier fed by high-chlorine Illinois coals, on zinc-titanate sorbents that are currently being developed for H{sub 2}S and COS removal from hot coal gas. This study is designed to identify any deleterious changes in the sorbent caused by the HCI, both in absorptive operation and in the regeneration cycle, and will pave the way to modify the sorbent formulation or the process operating procedure to remove HCl along with the H{sub 2}S and COS from hot coal gas. This will negate any harmful consequences of utilizing high-chlorine Illinois coal in these processes. The work activity during the third quarter of this project involved the performance of the second block-set of experiments in the bench-scale fluidized-bed reactor. These experiments were designed to study the effect of HCl in the desulfurization of a low-Btu fuel gas. Nine single-cycle experiments were performed, at operating temperature of 538, 650, and 750{degrees}C, with HCl concentrations of 0, 200, and 800 ppMv. The presence of HCl in the coal gas significantly enhanced the desulfurization efficacy of the sorbent. A 10-cycle sulfidation-regeneration sequence is currently being performed at 650{degrees}C with 800 ppMv HCl in the simulated fuel gas to determine any adverse effects on the sorbent structure or its desulfurization capability.

• Research Organization: Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
• DOE Contract Number: FG22-91PC91334
• OSTI ID: 10185608
• Report Number(s): DOE/PC/91334--T102; ON: DE93000940
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402
CARBON OXYSULFIDE
COAL GASIFICATION
DESULFURIZATION
EXPERIMENTAL DATA
FLUIDIZED BEDS
FUEL GAS
HOT GAS CLEANUP
HYDROCHLORIC ACID
HYDROGEN SULFIDES
PROGRESS REPORT
PURIFICATION AND UPGRADING
REMOVAL
SORPTIVE PROPERTIES
TEMPERATURE RANGE 0400-1000 K
TITANATES
U-GAS PROCESS
ZINC COMPOUNDS