Superior catalysts for selective catalytic reduction of nitric oxide. Quarterly technical progress report, 1 January 1994--31 March 1994
During the past quarter, progress has been made in four tasks as summarized below: Task 1: A delaminated Fe{sub 2}O{sub 3} pillared clay was synthesized and carefully characterized. The chemical composition was measured by ICP atomic emission spectrometry. The structural changes in the clay as well as the iron oxide particle sizes were characterized by X-ray diffraction techniques. Task 2: The Selective Catalytic Reduction (SCR, i.e., NO reduction with NH{sub 3}) activities of the delaminated pillared clay were tested and compared with four other most active SCR catalysts: a commercial V{sub 2}O{sub 5} + WO{sub 3}/TiO{sub 2} catalyst, a Fe{sub 2}O{sub 3}-pillared clay, and two supported Fe{sub 2}O{sub 3} catalysts (on Al{sub 2}O{sub 3} and TiO{sub 2}). The delaminated Fe{sub 2}O{sub 3} pillared clay exhibited the highest SCR activities. Catalyst stability test showed that the delaminated sample was also stable. Task 3: To further increase the SCR activity of the delaminated pillared clay, Cr{sub 2}O{sub 3} was doped as a promoter by incipient wetness. Task 4: Deactivation effects of SO{sub 2} and H{sub 2}O on the SCR activities of the delaminated Fe{sub 2}O{sub 3} pillared clay were studied, and compared with other SCR catalysts. The delaminated clay catalyst showed the least deactivation.
- Research Organization:
- State Univ. of New York, Buffalo, NY (United States). Dept. of Chemical Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-93PC93217
- OSTI ID:
- 10150062
- Report Number(s):
- DOE/PC/93217--T2; ON: DE94011777; BR: AA1525050
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010800
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
CHEMICAL PREPARATION
CHROMIUM OXIDES
EXPERIMENTAL DATA
IRON OXIDES
NITRIC OXIDE
POISONING
PROGRESS REPORT
SELECTIVE CATALYTIC REDUCTION
SULFUR DIOXIDE
TITANIUM OXIDES
TUNGSTEN OXIDES
VANADIUM OXIDES
WASTE MANAGEMENT
WATER VAPOR
010800
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
CHEMICAL PREPARATION
CHROMIUM OXIDES
EXPERIMENTAL DATA
IRON OXIDES
NITRIC OXIDE
POISONING
PROGRESS REPORT
SELECTIVE CATALYTIC REDUCTION
SULFUR DIOXIDE
TITANIUM OXIDES
TUNGSTEN OXIDES
VANADIUM OXIDES
WASTE MANAGEMENT
WATER VAPOR