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US 5,650,127 AGranted
NOx removal process
AssigneeGoal Line Environmental Technologies LLC
InventorsLarry E. Campbell, Eugene D. Guth, Robert Danziger
Life of this patent
Estimating the term…
Abstract
A method of decreasing the level of NOx and CO emissions in a gas turbine is disclosed. The method includes the steps of oxidizing NO and CO in the gas stream to corresponding NO.sub.2 and CO.sub.2, and then absorbing the nitrogen oxide pollutants on an absorption bed. The method can achieve levels of 0 to 2 ppm CO and 0.35 to 1.5 ppm NO in the resultant stream.
Claims16
A process to remove nitrogen oxides from turbine exhaust comprising the steps of:
- contacting a feed stream consisting essentially of nitrogen oxides including nitrogen dioxide and nitrogen oxide with an oxidation catalyst of platinum on an alumina support coated with zirconia at a space velocity in the range of 10,000 to 60,000 hr.sup.-1 at a temperature in the range of 200.degree. to 1000.degree. F., whereby substantially all of the nitrogen oxide is oxidized to nitrogen dioxide to produce an oxidized stream having reduced nitrogen oxide content from said feed stream and
- contacting said oxidized stream with an absorber selected from platinum or palladium coated over alumina, activated carbon or mixtures thereof at a space velocity in the range of 1000 to 50,000 hr.sup.-1 and temperatures in the range of 80.degree. to 600.degree. F. whereby an exhaust stream having a substantially reduced amount of nitrogen dioxide from said oxidized stream is produced.
Dependencies are inferred from the claim text.