发明名称 |
Hydrothermally stable catalyst for improved lean NOx reduction |
摘要 |
Certain metal-exchanged SUZ-4 zeolites have been prepared that have catalytic activity for the reduction of NOx in the exhaust of a hydrocarbon or alcohol fueled engine operated under fuel lean conditions. Initially the SUZ-4 zeolite contains alkali metal cations such as Li<+>, Na<+>, K<+> and/or Cs<+>. These alkali metal cation-containing zeolites are partially exchanged with at least one of copper (II), silver (I), iron (III) or cobalt (II) ions. The resulting partially exchanged SUZ-4 zeolites display such activity and are stable under extreme hydrothermal aging conditions.
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申请公布号 |
US6645448(B2) |
申请公布日期 |
2003.11.11 |
申请号 |
US20010982583 |
申请日期 |
2001.10.18 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
CHO BYONG KWON;BLINT RICHARD J.;SUBBIAH AYYAPPAN |
分类号 |
B01D53/94;B01J29/72;B01J29/76;(IPC1-7):F01N3/10 |
主分类号 |
B01D53/94 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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