Enhanced durability of high-temperature desulfurization sorbents for moving-bed applications. Option 2 Program: Development and testing of zinc titanate sorbents

Technical Report · Thu Apr 01 04:00:00 EST 1993

DOI:https://doi.org/10.2172/10106568· OSTI ID:10106568

Ayala, R E

One of the most advantageous configurations of the integrated gasification combined cycle (IGCC) power system is coupling it with a hot gas cleanup for the more efficient production of electric power in an environmentally acceptable manner. In conventional gasification cleanup systems, closely heat exchangers are necessary to cool down the fuel gases for cleaning, sometimes as low as 200--300{degree}F, and to reheat the gases prior to injection into the turbine. The result is significant losses in efficiency for the overall power cycle. High-temperature coal gas cleanup in the IGCC system can be operated near 1000{degree}F or higher, i.e., at conditions compatible with the gasifier and turbine components, resulting is a more efficient overall system. GE is developing a moving-bed, high-temperature desulfurization system for IGCC power systems in which mixed-metal oxides are currently being used as desulfurization sorbents. The objective of this contract is to identify and test fabrication methods and sorbent chemical compositions that enhance the long-term chemical reactivity and mechanical durability of zinc ferrite and other novel sorbents for moving-bed, high-temperature desulfurization of coal-derived gases. Zinc ferrite was studied under the base program of this contract. In the next phase of this program novel sorbents, particularly zinc titanate-based sorbents, are being studied under the remaining optional programs. This topical report summarizes only the work performed under the Option 2 program. In the course of carrying out the program, more than 25 zinc titanate formulations have been prepared and characterized to identify formulations exhibiting enhanced properties over the baseline zinc titanate formulation selected by the US Department of Energy.

• Research Organization: General Electric Co., Schenectady, NY (United States). Corporate Research and Development Center
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC21-88MC25003
• OSTI ID: 10106568
• Report Number(s): DOE/MC/25003--3495; ON: DE94000028; BR: AA0510000
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402
010404
20 FOSSIL-FUELED POWER PLANTS
200102
ADSORBENTS
CHEMICAL REACTION KINETICS
COAL GAS
COAL GASIFICATION
COMBINED-CYCLE POWER PLANTS
DESULFURIZATION
FERRITES
GASIFICATION
HOT GAS CLEANUP
MECHANICAL PROPERTIES
MOLYBDENUM
PELLETS
POROSITY
POWER CYCLES
PURIFICATION AND UPGRADING
TITANATES
ZINC COMPOUNDS