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    • 8. 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。
    • 10. 发明授权
    • Methods for the regeneration of a denitration catalyst
    • 脱硝催化剂再生方法
    • US06395665B2
    • 2002-05-28
    • US09263709
    • 1999-03-05
    • Shigeru NojimaKozo IidaYoshiaki Obayashi
    • Shigeru NojimaKozo IidaYoshiaki Obayashi
    • B01J3864
    • B01J38/60B01D53/8625B01D53/96B01J23/92B01J38/62B01J38/64B01J38/66B01J38/68Y02C20/30
    • This invention provides a method for the regeneration of a denitration catalyst which comprises cleaning a denitration catalyst having reduced denitration power with an aqueous alkaline solution to remove the substances deposited thereon, and subjecting the catalyst to an activation treatment with an aqueous acid solution; a method for the regeneration of a denitration catalyst which comprises cleaning a denitration catalyst having reduced denitration power with a cleaning fluid comprising an aqueous solution containing sulfuric acid or ammonia at a concentration of 0.05 to 20% by weight and maintained at a temperature of 10 to 90°C.; and a method for the regeneration of a denitration catalyst which comprises cleaning a denitration catalyst having reduced denitration power under the above-described conditions, and impregnating the denitration catalyst with a catalytically active component so as to support it on the catalyst.
    • 本发明提供了一种用于再生脱硝催化剂的方法,其包括用碱性水溶液清洗具有降低的脱硝功率的脱硝催化剂以除去其上沉积的物质,并用酸水溶液进行活化处理; 一种用于再生脱硝催化剂的方法,其包括用包含浓度为0.05至20重量%的硫酸或氨的水溶液的清洁流体清洗具有降低的脱硝功率的脱硝催化剂,并保持在10至 90°C。 以及脱硝催化剂的再生方法,该方法包括在上述条件下清洗具有降低的脱硝功率的脱硝催化剂,并用催化活性组分浸渍脱硝催化剂以便将其支持在催化剂上。