Selective removal of nitrogen oxides from waste gases using V--MO--W catalysts

Patent · Mon Jan 30 23:00:00 EST 1978

OSTI ID:5130786

Shiraishi, T; Shimizu, S; Shindo, T

A process for selective removal of nitrogen oxides from waste gases containing 1,500 ppM or less (gas volume) of nitrogen oxides is described. The waste gases are contacted with a metal oxide catalyst containing vanadium oxide and at least one of molybdenum oxide and tungsten oxide with an atomic ratio of the oxide forming elements of: V/sub 12-x-y/Mo/sub x/W/sub y/ wherein 0 < or = to x < or = to 8, 0 < or = to y < or = to 5 and 0.3 < or = to x + y < or = to 8, at a temperature of 150/sup 0/ to 700/sup 0/C in the presence of 0.3 to 4 mol of ammonia (on the basis of 1 mol of the nitrogen oxides).

• Assignee: Sumitomo Chemical Co., Ltd.
• Patent Number(s): US 4071601
• OSTI ID: 5130786
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas &amp; Particulate Emissions
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305 -- Energy Conservation
Consumption
&amp; Utilization-- Industrial &amp; Agricultural Processes-- Industrial Waste Management
33 ADVANCED PROPULSION SYSTEMS
330701 -- Emission Control-- Nitrogen Oxides
42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR POLLUTION CONTROL
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
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS
TUNGSTEN OXIDES
VANADIUM COMPOUNDS
VANADIUM OXIDES
WASTES