Hot Coal Gas Desulfurization with manganese based sorbents. Quarterly report, August 1, 1993--September 30, 1993

Technical Report · Fri Oct 01 00:00:00 EDT 1993

DOI:https://doi.org/10.2172/10131421· OSTI ID:10131421

Hepworth, M T

The focus of work being performed on Hot Coal Gas Desulfurization at the Morgantown Energy Technology Center is primarily in the use of zinc ferrite and zinc titanate sorbents; however, prior studies at the US Steel Fundamental Research Laboratories in Monroeville, PA, by E. T. Turkdogan indicated that an alternate sorbent, manganese dioxide-containing ore in mixture with alumina (75 wt % ore + 25 wt % Al{sub 2}O{sub 3}) may be a viable alternative to zinc-based sorbents. Manganese, for example, has a lower vapor pressure in the elemental state than zinc hence it is not as likely to undergo depletion from the sorbent surface upon loading and regeneration cycles. Also manganese oxide is less readily reduced to the elemental state than iron hence the range of reduction potentials for oxygen is somewhat greater than for zinc ferrite. In addition, thermodynamic analysis of the manganese-oxygen-sulfur system shows it to be less amenable to sulfation than zinc ferrite. Potential also exists for utilization of manganese at higher temperatures than zinc ferrite or zinc titanate. This report documents progress in pelletizing and testing via thermogravimetric analysis of individual pellet formulations of manganese ore/alumina combinations and also manganese carbonate/alumina with two binders, dextrin and bentonite. Preliminary results indicate that the manganese carbonate material, being of higher purity than the manganese ore, has a higher degree of sulfur capacity and more rapid absorption kinetics. A 2-inch fixed-bed reactor has been fabricated and is now ready for subjecting pellets to cyclic loading and regeneration.

• Research Organization: Minnesota Univ., Minneapolis, MN (United States). Dept. of Civil and Mineral Engineering
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC21-92MC29246
• OSTI ID: 10131421
• Report Number(s): DOE/MC/29246-3616; ON: DE94004057; BR: AA0510000
• Resource Relation: Other Information: PBD: Oct 1993
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL GASIFICATION
COAL GAS
DESULFURIZATION
HYDROGEN SULFIDES
REMOVAL
ZINC COMPOUNDS
FERRITES
TITANATES
HOT GAS CLEANUP
MANGANESE OXIDES
ADSORBENTS
ALUMINIUM OXIDES
PELLETIZING
THERMAL GRAVIMETRIC ANALYSIS
MANGANESE COMPOUNDS
CARBONATES
BINDERS
PROGRESS REPORT
010404
010402
GASIFICATION
PURIFICATION AND UPGRADING