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    • 3. 发明申请
    • Catalyst and method for reduction of nitrogen oxides
    • 用于还原氮氧化物的催化剂和方法
    • US20060029535A1
    • 2006-02-09
    • US10899749
    • 2004-07-27
    • Kevin Ott
    • Kevin Ott
    • B01D53/56
    • B01J29/7615B01D53/8625Y02C20/10
    • A Selective Catalytic Reduction (SCR) catalyst was prepared by slurry coating ZSM-5 zeolite onto a cordierite monolith, then subliming an iron salt onto the zeolite, calcining the monolith, and then dipping the monolith either into an aqueous solution of manganese nitrate and cerium nitrate and then calcining, or by similar treatment with separate solutions of manganese nitrate and cerium nitrate. The supported catalyst containing iron, manganese, and cerium showed 80 percent conversion at 113 degrees Celsius of a feed gas containing nitrogen oxides having 4 parts NO to one part NO2, about one equivalent ammonia, and excess oxygen; conversion improved to 94 percent at 147 degrees Celsius. N2O was not detected (detection limit: 0.6 percent N2O).
    • 通过将ZSM-5沸石浆料涂布到堇青石整料上制备选择性催化还原(SCR)催化剂,然后将铁盐升华到沸石上,煅烧整料,然后将整料浸入硝酸锰和铈的水溶液中 硝酸盐,然后煅烧,或通过用硝酸锰和硝酸铈的单独溶液进行类似处理。 含有铁,锰和铈的载体催化剂在113摄氏度的含有氮氧化物的转化率为80%,所述氮氧化物含有4份NO至1份NO 2,约1当量氨和过量氧 ; 转化率在147摄氏度时提高到94%。 未检测到N 2 O(检测限:0.6%N 2 O)。