会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • Catalyst for purifying exhaust gases
    • 废气净化催化剂
    • US5948376A
    • 1999-09-07
    • US615789
    • 1996-03-14
    • Naoto MiyoshiTuneyuki TanizawaKazunobu IshibashiKoichi KasaharaSyuji Tateishi
    • Naoto MiyoshiTuneyuki TanizawaKazunobu IshibashiKoichi KasaharaSyuji Tateishi
    • B01D53/14B01D53/86B01D53/94B01J23/56B01J23/58B01J23/63B01J37/02
    • B01D53/945B01D53/9481B01J23/58B01J23/63B01D2255/91B01J37/0248F01N2570/16Y02T10/22
    • A catalyst for purifying exhaust gases includes a porous support, an NO.sub.x storage component including at least one member selected from the group consisting of alkaline-earth metals, rare-earth elements and alkali metals, and loaded on the porous support, a noble metal catalyst ingredient loaded on the porous support, and disposed adjacent to the NO.sub.x storage component, and ceria (CeO.sub.2) disposed away from the noble metal catalyst ingredient. By disposing the noble metal catalyst ingredient adjacent to the NO.sub.x storage component, the reduction reactions of NO.sub.x can be facilitated in fuel-rich (i.e., oxygen-lean) atmospheres without being interfered by the ceria. By disposing the ceria away from the noble metal catalyst ingredient, oxygen, which has been stored thereon in fuel-lean (i.e., oxygen-rich) atmospheres, can be released from the ceria at a controlled rate in a controlled amount in fuel-rich (i.e., oxygen-lean) atmospheres, and thereby the released oxygen can be inhibited from reacting with HC and CO in fuel-rich (i.e., oxygen-lean) atmospheres. Thus, the catalyst is improved in terms of NO.sub.x purifying performance.
    • 用于净化废气的催化剂包括多孔载体,包含选自碱土金属,稀土元素和碱金属中的至少一种的负载在多孔载体上的NOx储存组分,贵金属催化剂 负载在多孔载体上并且邻近于NOx储存组分设置的成分和远离贵金属催化剂成分的二氧化铈(CeO 2)。 通过将贵金属催化剂成分配置在与NOx存储成分相邻的位置,可以在不受二氧化铈干扰的情况下,富含燃料(即贫氧)的气氛中的NOx的还原反应变得容易。 通过将二氧化铈置于贵金属催化剂成分之外,其中储存在贫燃料(即富氧)气氛中的氧可以以受控的量在二氧化铈中以富含燃料的方式从二氧化铈中释放出来 (即,贫氧)气氛,从而可以抑制释放的氧与富含燃料(即贫氧)气氛中的HC和CO反应。 因此,NOx净化性能提高了催化剂。
    • 2. 发明授权
    • Catalyst for purifying exhaust gases
    • 废气净化催化剂
    • US6004521A
    • 1999-12-21
    • US638045
    • 1996-04-26
    • Naoto MiyoshiTuneyuki TanizawaKoichi KasaharaSyuji Tateishi
    • Naoto MiyoshiTuneyuki TanizawaKoichi KasaharaSyuji Tateishi
    • B01D53/94B01J23/58B01J23/63B01J37/02F01N3/08
    • B01D53/945B01J23/58B01J23/63B01J37/0248F01N3/0814F01N3/0842B01D2255/91F01N2570/14Y02T10/22
    • A catalyst for purifying exhaust gases includes a heat resistant support, a porous layer coated on the heat resistant support, a noble metal catalyst ingredient loaded on the porous layer, and an NO.sub.x storage component including at least one member selected from the group consisting of alkaline-earth metals, rare-earth elements and alkali metals, and loaded on the porous layer. In the catalyst, the noble metal catalyst ingredient and the NO.sub.x storage component are disposed adjacent to each other, and are dispersed uniformly in the porous layer. In fuel-lean (i.e., oxygen-rich) atmospheres, NO present in exhaust gases is oxidized to NO.sub.2 by the noble metal catalyst ingredient, and at the same time the resulting NO.sub.2 is stored in the NO.sub.x storage component which is disposed adjacent to the nobel metal catalyst. In the stoichiometric or fuel-rich (i.e., oxygen-lean) atmospheres, the stored NO.sub.2 is released, and simultaneously urged to react with HC and CO present in exhaust gases by the action of the noble metal catalyst ingredient which is disposed adjacent to the NO.sub.x storage component. Hence, the catalyst is improved in terms of NO.sub.x purifying performance.
    • 用于净化废气的催化剂包括耐热性载体,涂覆在耐热性载体上的多孔层,负载在多孔层上的贵金属催化剂成分和包含选自碱性物质中的至少一种的NO x储存组分 - 地面金属,稀土元素和碱金属,并负载在多孔层上。 在催化剂中,贵金属催化剂成分和NOx存储成分彼此相邻配置,均匀地分散在多孔层中。 在贫燃(即富氧)气氛中,废气中存在的NO被贵金属催化剂成分氧化成NO2,同时所得的NO 2储存在与 诺贝尔金属催化剂。 在化学计量或富燃料(即贫氧)气氛中,储存的NO 2被释放,并且同时被与贵金属催化剂成分相邻的贵金属催化剂成分的作用与存在于废气中的HC和CO反应 NOx储存组件。 因此,在NOx净化性能方面,催化剂得到改善。