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    • 2. 发明申请
    • DESULFATION METHOD FOR SCR CATALYST
    • SCR催化剂的脱硫方法
    • WO2017168327A2
    • 2017-10-05
    • PCT/IB2017/051774
    • 2017-03-28
    • BASF CORPORATION
    • YANG, XiaofanTANG, WeiyongZHANG, Ze
    • B01J38/04B01J29/90F01N3/20B01J29/06B01J29/70B01J29/72B01J29/072B01D53/94
    • The present invention provides methods for low temperature desulfating sulfur-poisoned SCR catalysts, and emission control systems adapted to apply such desulfating methods, in order to regenerate catalytic NOx conversion activity. The methods are adapted for treating an SCR catalyst to desorb sulfur from the surface of the SCR catalyst and increase NOx conversion activity of the SCR catalyst, the treating step including treating the SCR catalyst with a gaseous stream comprising a reductant for a first treatment time period and at a first treatment temperature, wherein the first treatment temperature is about 350°C or less, followed by a second treatment time period and a second treatment temperature higher than the first treatment temperature, wherein the molar ratio of reductant to NOx during the treating step is about 1.05:1 or higher.
    • 本发明提供了用于低温脱硫硫中毒的SCR催化剂的方法以及适用于应用这种脱硫方法以便再生催化NOx转化活性的排放控制系统。 该方法适于处理SCR催化剂以从SCR催化剂的表面解吸硫并提高SCR催化剂的NO x转化活性,处理步骤包括用包含还原剂的气流在第一处理时间段处理SCR催化剂 并且在第一处理温度下,其中第一处理温度为约350℃或更低,接着是第二处理时间段和高于第一处理温度的第二处理温度,其中在处理期间还原剂与NO x的摩尔比 步骤约为1.05:1或更高。