Method for the removal of sulfur oxides and nitrogen oxides from exhaust gases

Patent · Tue Aug 23 04:00:00 EDT 1983

OSTI ID:5566190

Grochowski, H; Knoblauch, K

Sulfur oxides and nitrogen oxides are removed from exhaust gases containing additionally oxygen and steam, by the addition of gaseous ammonia at temperatures between about 110/sup 0/ and 180/sup 0/ C. The exhaust gases travel in the interior of a reactor across a travelling bed which goes from above to below, composed of granulated, carbon-containing adsorbent with or without catalysts. In the first travelling bed initially a large portion of the sulfur oxides is adsorptively removed. In the second travelling bed after dosed addition of gaseous ammonia the nitrogen oxides are catalytically reduced to nitrogen as well as further sulfur oxides being separated. The improvement involves extending the path of the exhaust gases between the first and the second travelling beds and introducing into the volume of the exhaust gas stream between the travelling beds a forced mixture of dosed added ammonia with the exhaust gas departing from the first travelling bed.

• Assignee: Bergwerksverband GmbH (Germany, Federal Republic Of)
• Patent Number(s): US 4400363
• OSTI ID: 5566190
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
ADSORPTION
AMMONIA
CHALCOGENIDES
CHEMICAL REACTIONS
DESULFURIZATION
ELEMENTS
EXHAUST GASES
FLUIDS
GASEOUS WASTES
GASES
HYDRIDES
HYDROGEN COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
POWER PLANTS
REMOVAL
SORPTION
STEAM
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES