Desulfurization of hot fuel gas produced from high-chlorine Illinois coals. Final technical report, September 1, 1991--August 31, 1992

Technical Report · Thu Dec 31 04:00:00 EST 1992

DOI:https://doi.org/10.2172/10117820· OSTI ID:10117820

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., Research Triangle Park, NC (United States)

In this project, simulated gasifier-product streams were contacted with the zinc titanate desulfurization sorbent in a bench-scale atmospheric fluidized-bed reactor at temperatures ranging from 538 to 750 {degree}C (1000 to 1382 {degree}F). The first set of experiments involved treating a medium-Btu fuel gas (simulating that of a ``Texaco`` oxygen-blown, entrained-bed gasifier) containing 1.4 percent H{sub 2}S and HCl concentrations of 0, 200, and 1500 ppmv. The second experimental set evaluated hot-gas desulfurization of a low-Btu fuel gas (simulating the product of the ``U-Gas`` air-blown gasifier), with HCl concentrations of 0, 200, and 800 ppmv. These operating conditions were typical of the gas-treatment requirements of gasifiers fueled by Illinois basin coals containing up to 0.6 percent chlorine. The results of the experiments at 538 and 650 {degree}C at all the HCl concentrations revealed no deleterious effects on the capability of the sorbent to remove H{sub 2}S from the fuel gas mixtures. In most cases, the presence of the HCl significantly enhanced the desulfurization reaction rate. Some zinc loss, however, was encountered in certain situations at 750 {degree}C when low-steam operating conditions were present. Also of interest, a portion of the incoming HCl was removed from the gas stream and was retained permanently by the sorbent. This behavior was examined in more detail in a limited set of experiments aimed at identifying ways to modify the sorbents composition so that the sorbent could act as a simultaneous desulfurization and dechlorination agent in the hot-gas cleanup process.

• 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: 10117820
• Report Number(s): DOE/PC/91334--T125; ON: DE94005726; BR: AV0100000
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402
010404
CHLORIDES
COAL
COAL DEPOSITS
COAL GAS
COAL GASIFICATION
DESULFURIZATION
EXPERIMENTAL DATA
GASIFICATION
HOT GAS CLEANUP
HYDROCHLORIC ACID
HYDROGEN SULFIDES
ILLINOIS
PROGRESS REPORT
PURIFICATION AND UPGRADING
REMOVAL
SULFUR CONTENT
TEXACO GASIFICATION PROCESS
TITANATES
U-GAS PROCESS
ZINC COMPOUNDS