Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Method and composition for utilizing lime-urea hydrates to simultaneously reduce NO/sub x/ and SO/sub x/ in combustion effluents

Patent ·
OSTI ID:5244732
;
A method for simultaneously reducing sulfur and nitrogen oxides from a gaseous oxygen containing stream at a temperature of at least about 400/sup 0/F is described comprising: introducing into the stream at a predetermined ratio as a sorbent for the sulfur and nitrogen oxides, a composition comprising hydrated lime and a carboxamide in an amount sufficient to reduce the sulfur and nitrogen oxides in the effluent stream. The composition is prepared by hydrating lime in an aqueous medium containing the carboxamide and removing uncomplexed water to provide dry particles. The predetermined ratio is in an amount to provide a calcium to sulfur molar ratio of about 0.1 to 10 and carboxamide amino nitrogen to NO/sub x/ equivalent ratio in the range of about 0.2 to 20.
Assignee:
NOV; NOV-88-008629; EDB-88-097463
Patent Number(s):
US 4731233
OSTI ID:
5244732
Country of Publication:
United States
Language:
English

Similar Records

Simultaneous NO sub x /SO sub 2 removal by the dry injection of lime-urea hydrate
Technical Report · Wed Feb 28 23:00:00 EST 1990 · OSTI ID:7178285
Method and composition for decreasing emissions of sulfur oxides and nitrogen oxides
Patent · Tue Apr 25 00:00:00 EDT 1989 · OSTI ID:5954974
Sulfur dioxide sorption reactivity of hydrated lime: effect of hydration method
Conference · Wed Dec 31 23:00:00 EST 1986 · Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) · OSTI ID:6136419

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
500200 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION
ADSORBENTS
AIR POLLUTION CONTROL
ALKALINE EARTH METALS
AMIDES
AQUEOUS SOLUTIONS
CALCIUM
CARBONATE ROCKS
CARBONIC ACID DERIVATIVES
CARBOXYLATION
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CONTROL
DENITRIFICATION
DESORPTION
DESULFURIZATION
DISPERSIONS
ELEMENTS
GASEOUS WASTES
HYDRATES
LIMESTONE
METALS
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
REMOVAL
ROCKS
SEDIMENTARY ROCKS
SOLUTIONS
SORPTIVE PROPERTIES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE PROPERTIES
UREA
WASTES