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    • 4. 发明授权
    • Discharge gas treatment catalyst
    • 放电气处理催化剂
    • US07863216B2
    • 2011-01-04
    • US11231861
    • 2005-09-22
    • Yoshiaki ObayashiToshiyuki OnishiKozo Iida
    • Yoshiaki ObayashiToshiyuki OnishiKozo Iida
    • B01J23/00B01J21/00B01J20/00
    • B01D53/8628B01D53/79B01D53/8609
    • The invention provides a discharge gas treatment catalyst which can effectively decreases NOx and SO3 contained in a discharge gas. The discharge gas treatment catalyst, for removing nitrogen oxide and sulfur trioxide from a discharge gas, includes a carrier which is formed of titania-tungsten oxide and which carries ruthenium, and a titania-tungsten oxide-based NOx removal catalyst serving as a substrate which is coated with the carrier. When a discharge gas to which ammonia has been added and which contains SO3 and NOx is brought into contact with the catalyst, decomposition of ammonia is suppressed by ruthenium, and reduction of SO3 and NOx contained in the discharge gas is promoted, whereby SO3 concentration and NOx concentration can be further decreased.
    • 本发明提供一种放电气体处理催化剂,能够有效地减少放电气体中所含的NOx和SO 3。 用于从放电气体中除去氮氧化物和三氧化硫的放电气体处理催化剂包括由二氧化钛 - 氧化钨形成并载有钌的载体和用作基板的二氧化钛 - 氧化钨基NOx去除催化剂 涂有载体。 当添加有氨并且含有SO 3和NO x的放电气体与催化剂接触时,由钌抑制氨的分解,促进放电气体中所含的SO 3和NO x的还原,由此SO 3浓度和 NOx浓度可以进一步降低。
    • 10. 发明申请
    • Flue gas denitration catalyst and preparation process thereof
    • 烟气脱硝催化剂及其制备方法
    • US20050054523A9
    • 2005-03-10
    • US10705365
    • 2003-11-10
    • Shigeru NojimaKozo IidaYoshiaki ObayashiKatsumi NochiMasashi Kiyosawa
    • Shigeru NojimaKozo IidaYoshiaki ObayashiKatsumi NochiMasashi Kiyosawa
    • B01D53/94B01D53/86B01J23/00B01J23/30B01J35/04B01J37/02
    • B01D53/8631B01D53/8628B01J23/002B01J23/30B01J35/04B01J37/0238
    • Provided are a flue gas denitration catalyst having high denitration activity and capable of suppressing a side reaction, that is, oxidation of SO2; and a preparation process of the catalyst. The flue gas denitration catalyst comprises TiO2, WO3 and V2O5. In the surface layer of the catalyst within 200 μm from the surface thereof, V2O5 is supported on a carrier containing TiO2 and WO3. The supported amounts of V2O5 range from 0.4 to 5 wt. % based on the weight of the surface layer and range from 0.1 to 0.9 wt. % based on the total weight of the catalyst. The V2O5 thus supported has a crystallite size of less than 10 nm as measured by X-ray diffraction. The catalyst can be available by preparing a mixture containing TiO2 and WO3 and having V2O5 supported on the surface of an extruded product of the prepared mixture by a vapor phase method. The catalyst can be also available by having V2O5 supported on a powder of the prepared mixture by a vapor phase method and having the resulting powder supported on the surface of a formed product.
    • 本发明提供一种脱硝活性高,能够抑制副反应即SO2氧化的烟道气脱硝催化剂。 和催化剂的制备方法。 烟气脱硝催化剂包括TiO 2,WO 3和V 2 O 5。 在催化剂的表面200μm以内的表面层中,将V 2 O 5负载在含有TiO 2和WO 3的载体上。 V2O5的负载量为0.4〜5wt。 %,基于表层的重量,为0.1-0.9wt。 %,基于催化剂的总重量。 如此支持的V 2 O 5通过X射线衍射测得的微晶尺寸小于10nm。 催化剂可以通过制备含有TiO 2和WO 3的混合物并且通过气相法将V 2 O 5负载在所制备的混合物的挤出产品的表面上来获得。 催化剂也可以通过使V 2 O 5通过气相法在制备的混合物的粉末上负载并将所得粉末负载在成形产品的表面上来获得。