Catalyst for purifying exhaust gas and method for purifying exhaust gas
    1.
    发明授权
    Catalyst for purifying exhaust gas and method for purifying exhaust gas 失效
    废气净化催化剂及排气净化方法

    公开(公告)号:US5518976A

    公开(公告)日:1996-05-21

    申请号:US273430

    申请日:1994-07-11

    摘要: A catalyst for purifying exhaust gas comprising crystalline iridium silicate having a Si/Ir atomic ratio of 50 to 800 and a Si/Al atomic ratio of not less than 15. The catalyst exhibits excellent activity and selectivity when used for purification of, and specifically for eliminating NOx from, an exhaust gas which contains reducing components including hydrocarbons, oxygen in excess of the stoichiometric quantity necessary for completely oxidizing all of the reducing components, and nitrogen oxides. The catalyst is highly durable to hydrothermal aging.

    摘要翻译: 一种用于净化排气的催化剂,其包含Si / Ir原子比为50至800且Si / Al原子比不小于15的结晶铱硅酸盐。当用于纯化时,该催化剂表现出优异的活性和选择性,并且具体用于 从包含烃的还原成分的废气中除去NOx,超过完全氧化所有还原成分所需的化学计量量的氧和氮氧化物。 催化剂对水热老化具有高度的耐久性。

    Catalyst for selective oxidation and elimination of carbon monoxide present in hydrogen-containing gases
    3.
    发明授权
    Catalyst for selective oxidation and elimination of carbon monoxide present in hydrogen-containing gases 失效
    用于选择性氧化和消除含氢气体中存在的一氧化碳的催化剂

    公开(公告)号:US06576208B1

    公开(公告)日:2003-06-10

    申请号:US09704694

    申请日:2000-11-03

    IPC分类号: B01J2340

    摘要: A catalyst for selective oxidation of carbon monoxide present in a hydrogen-containing gas is provided in which the catalyst comprises ruthenium supported on an alumina hydrate. This catalyst has a high selective oxidation activity to carbon monoxide. A carbon monoxide elimination method using this catalyst is also provided. In this method, to a gas containing at least hydrogen and carbon monoxide and being richer in the hydrogen than the carbon monoxide on the basis of volume, oxygen is added in an amount necessary for oxidizing at least part of carbon monoxide present in that gas, and thereafter the gas to which the oxygen has been added is brought into contact with the catalyst described above. Also provided is a solid polymer electrolyte fuel cell system that utilizes this method.

    摘要翻译: 提供了一种用于选择性氧化存在于含氢气体中的一氧化碳的催化剂,其中催化剂包含负载在氧化铝水合物上的钌。 该催化剂对一氧化碳具有高选择性氧化活性。 还提供了使用该催化剂的一氧化碳消除方法。 在该方法中,基于体积,至少含有一氧化碳和一氧化碳的气体比一氧化碳更丰富,以氧气中存在的至少一部分一氧化碳的量加入氧气, 然后使已经加入氧气的气体与上述催化剂接触。 还提供了利用该方法的固体聚合物电解质燃料电池系统。