Selective removal of nitrogen oxides from waste gases
A process for the selective removal of nitrogen oxides from waste gases containing sulfur oxides as well as nitrogen oxides is described. The waste gases are contacted with a catalyst comprising active metal oxides consisting of vanadium oxide and at least one of molybdenum oxide and tungsten oxide as a catalytically active component and ..cap alpha..-alumina having a specific surface area of 0.3 to 12 m/sup 2//g and a pore volume of 0.1 cm/sup 3//g or more as a carrier. The atomic ratio of the vanadium, molybdenum, tungsten and aluminum contained in the carrier alumina is given. The catalyst works in the presence of ammonia of 0.3 to 4 mol on the basis of 1 mol of nitrogen oxides contained in the waste gases at a temperature of 150 to 700/sup 0/C.
- Assignee:
- Sumitomo Chemical Co., Ltd.
- Patent Number(s):
- US 4075283
- OSTI ID:
- 5130792
- Country of Publication:
- United States
- Language:
- English
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Process for removal of nitrogen oxides from waste gas
Selective removal of nitrogen oxides from waste gas
Related Subjects
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR POLLUTION CONTROL
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AMMONIA
CATALYSTS
CATALYTIC CONVERTERS
CHALCOGENIDES
CHEMICAL COMPOSITION
EQUIPMENT
GASEOUS WASTES
HYDRIDES
HYDROGEN COMPOUNDS
MOLYBDENUM COMPOUNDS
MOLYBDENUM OXIDES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
REMOVAL
SULFUR COMPOUNDS
SULFUR OXIDES
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
TUNGSTEN OXIDES
VANADIUM COMPOUNDS
VANADIUM OXIDES
WASTES