发明授权
- 专利标题: Selective catalytic reduction of nitrogen oxides
- 专利标题(中): 氮氧化物的选择性催化还原
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申请号: US100940申请日: 1993-08-03
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公开(公告)号: US5401478A公开(公告)日: 1995-03-28
- 发明人: Clarence D. Chang , Jose G. Santiesteban , David S. Shihabi , Scott A. Stevenson
- 申请人: Clarence D. Chang , Jose G. Santiesteban , David S. Shihabi , Scott A. Stevenson
- 申请人地址: VA Fairfax
- 专利权人: Mobil Oil Corp.
- 当前专利权人: Mobil Oil Corp.
- 当前专利权人地址: VA Fairfax
- 主分类号: B01D53/86
- IPC分类号: B01D53/86 ; B01D53/94 ; B01J23/68 ; B01J23/888 ; B01J23/889 ; C01B21/02 ; C01B21/20
摘要:
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.