Superior catalysts for selective catalytic reduction of nitric oxide. Final technical report, October 1, 1993--September 30, 1995
The most advanced and proven technology for NO{sub x} control for stationary sources is Selective Catalytic Reduction (SCR). In SCR, NO{sub x} is reduced by NH{sub 3} to N{sub 2} and H{sub 2}O. The commercial catalysts are based on V{sub 2}O{sub 5}/TiO{sub 2}, and the vanadium-based catalysts are patented by the Japanese (Mitsubishi). However, there are three main advantages for the vanadium-based SCR catalyst: (a) a tendency to be poisoned in the flue gas; (b) oxidation of SO{sub 2} to SO{sub 3} by V{sub 2}O{sub 5}, this is a particularly severe problem due to the higher sulfur content of American coals compared with coals used in Japan (from Australia) and in Europe; (c) environmental problems involved in the disposal of the spent catalyst (due to the toxicity of vanadium). In order to overcome these problems, in addition to the undesirable dominance by the Japanese patent position, the authors have studied in this project a new type of catalyst for the SCR reaction; namely, pillared clays, which have adjustable, unique structures and acidity. Three types of catalysts were developed and tested for this reaction, i.e. Fe{sub 2}O{sub 3}-pillared clays, delaminated Fe{sub 2}O{sub 3}-pillared clays, and ion-exchanged pillared clays. The project was divided into sixteen tasks, and will be reported as such.
- Research Organization:
- State Univ. of New York, Buffalo, NY (United States). Dept. of Chemical Engineering; Michigan Univ., Ann Arbor, MI (United States). Dept. of Chemical Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-93PC93217
- OSTI ID:
- 257354
- Report Number(s):
- DOE/PC/93217-T9; ON: DE96012353; TRN: AHC29615%%50
- Resource Relation:
- Other Information: PBD: [1995]
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
NITRIC OXIDE
SELECTIVE CATALYTIC REDUCTION
CLAYS
CATALYTIC EFFECTS
IRON OXIDES
PROGRESS REPORT
FLUE GAS
AIR POLLUTION CONTROL
NITROGEN OXIDES
AMMONIA
NITROGEN
WATER VAPOR
VANADIUM OXIDES
TITANIUM OXIDES
POISONING
CHEMICAL REACTORS
CHEMICAL PREPARATION
CATALYSTS
CHROMIUM OXIDES
PROMOTERS
SODIUM OXIDES
POTASSIUM OXIDES
CESIUM OXIDES
INHIBITION
SULFUR DIOXIDE
ETHYLENE
EXPERIMENTAL DATA