Investigation on durability and reactivity of promising metal oxide sorbents during sulfidation and regeneration. Quarterly report, April--June 1995
Hot-gas desulfurization for the integrated gasification combined cycle (IGCC) process has been investigated by many researchers to remove effectively hydrogen sulfide with various metal oxide sorbents at high pressures and high temperatures. Metal oxides such as zinc titanate oxides, zinc ferrite oxide, copper oxide, manganese oxide and calcium oxide, were found to be promising sorbents in comparison with other removal methods such as membrane separations and reactive membrane separations. Removal reaction of H{sub 2}S from coal gas mixtures with ZT-4 or other promising sorbents of fine solid particles, and regeneration reaction of sulfur-loaded sorbents will be carried on in a batch reactor or a continuous differential reactor. The objectives of this research project are to find intrinsic initial reaction kinetics for the metal oxide-hydrogen sulfide heterogeneous reaction system, to obtain effects of concentrations of coal gas components such as hydrogen, carbon monoxide, carbon dioxide, oxygen, nitrogen and moisture on equilibrium reaction rate constants of the reaction system at various reaction temperatures and pressures, to identify regeneration kinetics of sulfur-loaded metal oxide sorbents, and to formulate promising metal oxide sorbents for the removal of sulfur from coal gas mixtures. Promising durable metal oxide sorbents of high-sulfur-absorbing capacity will be formulated by mixing active metal oxide powders with inert metal oxide powders and calcining these powder mixtures, or impregnating active metal oxide sorbents on supporting metal oxide matrixes. The Research Triangle Institute, a sub-contractor of this research project, will also prepare promising metal oxide sorbents for this research project, plan experiments on removal of sulfur compounds from coal gases with metal oxide sorbents as well as regeneration of sulfur-loaded metal oxide sorbents, and review experimental results.
- Research Organization:
- Tuskegee Univ., AL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG21-94MC31206
- OSTI ID:
- 206413
- Report Number(s):
- DOE/MC/31206-5119; ON: DE96004347
- Resource Relation:
- Other Information: PBD: Jul 1995
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL GAS
DESULFURIZATION
HOT GAS CLEANUP
SORBENT RECOVERY SYSTEMS
HYDROGEN SULFIDES
REMOVAL
ADSORBENTS
COMPARATIVE EVALUATIONS
PROGRESS REPORT
ZINC COMPOUNDS
TITANATES
ZINC OXIDES
IRON OXIDES
COPPER OXIDES
MANGANESE OXIDES
CALCIUM OXIDES
REACTION KINETICS
EXPERIMENTAL DATA