Development of the mixed-metal oxide process for high-temperature fuel gas desulfurization and a ceramic-supported molten alkali carbonate sorbent for high-temperature HCl removal

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:6100916

Anderson, G L; Berry, F O; Gross, M N

During the past year, several alternative metal ozide-containing sorbents have undergone laboratory-scale screening tests to determine their suitability for use in the IGT mixed metal oxide process for high temperature fuel gas desulfurization. Based on these tests, two mixtures of metal oxide-containing sorbents have been selected for upcoming bench-scale tests. These are (1) a combination of cobalt titanate- and zinc oxide-containing sorbents and (2) a combination of cobalt titanate-, zinc oxide- and cobalt oxide-containing sorbents. The first mixture is expected to be able to reduce the sulfur content of a typical coal-derived fuel gas to less than 30 ppM at 1200/sup 0/F while the second mixture is expected to be able to reduce the sulfur content to less than 1 ppM. However, the most important attribute of either mixture is that when regenerated with air and recycled tail gas from the regeneration, the fuel gas sulfur is expected to be recovered as elemental sulfur rather than SO/sub 2/. Laboratory-scale studies on a ceramic-supported molten alkali carbonate sorbent for the removal of HCl from high temperature fuel gases have also been completed. The sorbent, which was prepared by a technique developed by IGT for producing a similar high temperature thermal energy storage media was found to be extremely reactive toward HCl and to have an excellent HCl removal capacity. In a recent fixed-bed test with the sorbent, the HCl content of a gas containing 99.66% CO/sub 2/, 3000 ppM H/sub 2/O and 400 ppM HCl was reduced to less than 0.75 ppM at 1110/sup 0/F, atmospheric pressure, and a space velocity of 1000 h/sup -1/. Analysis of the sorbent after the test indicated a sorption capacity of approximately 16 lb chloride/100 lb sorbent. 2 references, 8 figures, 9 tables.

• Research Organization: Institute of Gas Technology, Chicago, IL (USA); Dow Corning Corp., Midland, MI (USA)
• OSTI ID: 6100916
• Report Number(s): CONF-8405124-2; ON: TI85900655
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CARBON COMPOUNDS
CARBON OXYSULFIDE
CARBON SULFIDES
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
COBALT COMPOUNDS
COBALT OXIDES
DATA
DESULFURIZATION
DIAGRAMS
ELEMENTS
EXPERIMENTAL DATA
FLOWSHEETS
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
HIGH TEMPERATURE
HOT GAS CLEANUP
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INFORMATION
INORGANIC ACIDS
LITHIUM CARBONATES
LITHIUM COMPOUNDS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PURIFICATION
RECOVERY
REMOVAL
SODIUM CARBONATES
SODIUM COMPOUNDS
SORBENT RECOVERY SYSTEMS
SULFIDES
SULFUR
SULFUR COMPOUNDS
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZINC COMPOUNDS
ZINC OXIDES