Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Patent
1993-08-03
1995-03-28
Straub, Gary P.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
423237, 4232391, 4232392, C01B 2120
Patent
active
054014786
ABSTRACT:
There is provided a catalytic method for converting nitrogen oxides to nitrogen (i.e., N.sub.2). The catalyst for this method comprises an acidic solid component comprising a Group IVB metal oxide modified with an oxyanion of a Group VIB metal. An example of this catalyst is zirconia, modified with tungstate. This method may be used for reducing emissions of nitrogen oxides from waste gases, including industrial exhaust gases and automobile exhaust gases. In a particular embodiment, nitrogen oxides in waste gases may be reacted with ammonia before the waste gases are discharged to the atmosphere.
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Chang Clarence D.
Santiesteban Jose G.
Shihabi David S.
Stevenson Scott A.
Kenehan, Jr. Edward F.
McKillop Alexander J.
Mobil Oil Corp.
Santini Dennis P.
Straub Gary P.
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