Removal of undesirable gaseous components from a hot waste gas

Patent · Tue Feb 07 04:00:00 EST 1984

OSTI ID:6671088

Linde, G

In a process for the removal of sulfur dioxide and nitrogen oxides, the waste gas is cooled and scrubbed with a physical absorbent selective for sulfur dioxide. The nitrogen oxides are catalytically removed from the waste gas by reaction with ammonia, which is added to the waste gas prior to the scrubbing step. The catalyst packing is disposed in the same housing and is at the hot end of a regenerator for cooling the waste gas and is arranged upstream of the regenerator packing. The cooling is conducted to the dew point so as to dissolve residual ammonia, and air is used to remove the ammonia during regeneration, the resultant heated air being primarily used in the combustion zone.

• Assignee: Linde Aktiengesellschaft (Germany, Federal Republic of)
• Patent Number(s): US 4430303
• OSTI ID: 6671088
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AMMONIA
CATALYSIS
CHALCOGENIDES
DESIGN
EQUIPMENT
GASEOUS WASTES
HYDRIDES
HYDROGEN COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL EQUIPMENT
PURIFICATION
REGENERATORS
SCRUBBERS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES
ZEOLITES