Removal of oxides of nitrogen from gas streams which also contain sulfur dioxide

Patent · Tue Nov 18 00:00:00 EST 1975

OSTI ID:7298125

Collins, D D

Method and means are described for removal of oxides of nitrogen (NOx) from gas streams which also contain sulfur dioxide. Examples of such streams are stack gases from electrical generation plants which use fuels containing sulfur, such as some coals and fuel oils. The invention contemplates the absorption in water of the sulfur dioxide to form sulfurous acid, the addition of a multivalent metal such as iron to the resulting aqueous solution, and the reduction of the nitrogen in the oxides of nitrogen to elemental nitrogen as a consequence of reaction of the oxides of nitrogen with the metal-containing solution.

• Assignee: Chemsoil Corp.
• Patent Number(s): US 3920421
• OSTI ID: 7298125
• Resource Relation: Patent File Date: Filed date 15 Jan 1974
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
FLUE GAS
DENITRIFICATION
NITROGEN OXIDES
REMOVAL
POLLUTION CONTROL EQUIPMENT
DESIGN
AIR POLLUTION
CHEMICAL REACTIONS
FOSSIL-FUEL POWER PLANTS
SULFUR DIOXIDE
CHALCOGENIDES
EQUIPMENT
GASEOUS WASTES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
POWER PLANTS
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions