Development of process for combined NO/sub x//SO/sub x/ control. Technical progress report, January 1984. [Iron- and copper-exchanged synthetic mordenite zeolite]
Exchange/impregnation studies and adsorption testing of iron- and copper-exchanged synthetic mordenite zeolite is continuing. The major technical progress made during the reporting period is summarized as follows: (1) Copper-exchanged zeolite is slightly more reactive than iron-exchanged zeolite with regards to removing SO/sub 2/ at the process conditions. (2) The capacity of iron-exchanged zeolite for chemisorbing SO/sub 2/ is quite dependent on the method and technique used in the ion exchange/impregnation. Iron (II) cations are much preferred compared with iron(III) cations even though the iron(II) is undoubtedly oxidized to iron(III) at the reaction operating conditions. (3) The utilization efficiencies of the loaded copper with respect to reaction with the SO/sub 2/ is in the range of 50 to 60% while monitoring an overall 90% SO/sub 2/ removal efficiency when 2-in. deep adsorbent beds are used. When 12-in. deep adsorption beds were used, the utilization efficiency of the iron-exchanged zeolites are on the order of 40%. (4) The iron-exchanged zeolites consistently provided greater than 90% NO/sub x/ removal efficiencies, usually greater than 95%, even with 2-in. deep adsorption beds. With the copper-exchanged zeolites, the NO/sub x/ removal efficiencies were in the range of about 50 to 70%. (5) Preliminary studies were performed on regeneration of the chemisorbed products using CO and H/sub 2/ in CO/sub 2/ carrier gas. The use of hydrogen appears to be more efficient than CO on the reducing gas, but mixtures of CO and H/sub 2/ appear to work as well. An insufficient number of tests have been run to draw definitive conclusions at this time.
- Research Organization:
- Science Applications, Inc., San Diego, CA (USA)
- DOE Contract Number:
- AC22-83PC60265
- OSTI ID:
- 5262346
- Report Number(s):
- SAI-84/3021; ON: DE84006688
- Country of Publication:
- United States
- Language:
- English
Similar Records
Bench-scale studies on the use of metal-exchanged synthetic mordenite for the simultaneous removal of NO/sub x/ and SO/sub x/ from simulated flue gases: Final report
Development of process for combined NO/sub x//SO/sub x/ control. Technical progress report, September 1984
Related Subjects
42 ENGINEERING
20 FOSSIL-FUELED POWER PLANTS
NITROGEN OXIDES
ADSORPTION
REMOVAL
SULFUR DIOXIDE
ZEOLITES
REGENERATION
SORPTIVE PROPERTIES
CARBON DIOXIDE
CARBON MONOXIDE
CATIONS
COMPARATIVE EVALUATIONS
COPPER COMPOUNDS
EFFICIENCY
HYDROGEN
ION EXCHANGE
IRON COMPOUNDS
MORDENITE
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHARGED PARTICLES
ELEMENTS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IONS
MATERIALS
MINERALS
NITROGEN COMPOUNDS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
SILICATE MINERALS
SORPTION
SULFUR COMPOUNDS
SULFUR OXIDES
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
010800* - Coal
Lignite
& Peat- Waste Management
424000 - Engineering- Pollution Control Equipment- (1980-1989)
200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions