Mild temperature gasification: Partitioning sulfur to gas as H{sub 2}S. Final technical report, September 1, 1992--November 30, 1993
- Kentucky Univ., Lexington, KY (United States). Center for Applied Energy Research
- Kentucky Univ., Lexington, KY (United States)
Bench-scale, mild-temperature fluidized bed gasification (MTFBG) was performed on three high sulfur Illinois basin coals after mixing with phosphoric-acid. The research initiated development of an advanced processing technology which partitions coal sulfur to the gas phase as H{sub 2}s. The MTFBG experiments were performed on Illinois coals IBC-101, IBC-106 and IBC-110. Product yields were between 60--80% char, 0.41.3% tar and 20--40% gases. Gas yields were sensitive to the coal/acid mixing ratios and the residence time of the coal within the gasifier. Tar and gas yields were significantly lower for coal/acid feeds than for coal-only feeds. At 500{degrees}C, the sulfur removal was as high as 82% for IBC-106; sulfur emissions during combustion of this char would be 1.10 lbs SO{sub 2}/MMBtu. Emission levels from the IBC-110 char would be 1.15 lbs SO{sub 2}/MMBtu whereas it would be 2.15 lb SO,/MmBtu from the IBC-101 char. In comparison, the emission levels from chars produced during gasification of coal using no acid would be 4.35 (IBC-110) and 4.81 (IBC-101), whereas the emission levels of the parent coals would be between 5--6 lb SO{sub 2}/MMBtu. Gas product analysis confirmed that the coal sulfur was removed as H{sub 2}s. Pressurized hot-water filtration of the chars removed nearly 80% of the phosphorus. Its removal rate should be near 95% to restrain the reagent cost to less than $25/Ton of SO{sub 2}.
- Research Organization:
- Kentucky Univ., Lexington, KY (United States). Center for Applied Energy Research
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FC22-92PC92521
- OSTI ID:
- 10134534
- Report Number(s):
- DOE/PC/92521-T99; ON: DE94008338; BR: AV0100000/AV0102000
- Resource Relation:
- Other Information: PBD: [1993]
- Country of Publication:
- United States
- Language:
- English
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