发明名称 |
Catalyst for purifying exhaust gas, process for producing the same, and method for purifying exhaust gas |
摘要 |
A catalyst for purifying an exhaust gas includes a support including rutile titania, an NOx storage material including at least on element selected from alkali metals, alkaline-earth metals and rare-earth elements and loaded on the support, and a noble metal loaded on the support. Since the rutile TiO2 and the NOx storage material form a fine composite oxide, the NOx storage material is likely to decompose even when it is subject to the sulfur poisoning, and the NOx storage material easily recovers the NOx storage ability. Therefore, the NOx storage material can be inhibited from the sulfur poisoning, and a high NOx conversion ratio can be maintained even after the service at an elevated temperature.
|
申请公布号 |
US6649133(B1) |
申请公布日期 |
2003.11.18 |
申请号 |
US20000581938 |
申请日期 |
2000.08.11 |
申请人 |
TOYOTA JIDOSHA KABUSHIKI KAISHA;KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO |
发明人 |
HASEGAWA YORIKO;KIMURA MAREO;TAKAHASHI NAOKI;SUZUKI HIROMASA;TANIZAWA RIEMI;SOBUE KAZUAKI |
分类号 |
B01D53/94;B01J21/06;B01J23/00;B01J23/58;B01J23/63;F01N3/08;(IPC1-7):B01D53/56 |
主分类号 |
B01D53/94 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|