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    Method for the regeneration of a denitration catalyst
    1.
    发明授权
    Method for the regeneration of a denitration catalyst 失效
    脱硝催化剂再生方法

    公开(公告)号：US6025292A

    公开(公告)日：2000-02-15

    申请号：US023219

    申请日：1998-02-12

    申请人： Yoshiaki Obayashi ,  Kouzo Iida ,  Atsushi Morii ,  Osamu Naito ,  Akira Hattori

    发明人： Yoshiaki Obayashi ,  Kouzo Iida ,  Atsushi Morii ,  Osamu Naito ,  Akira Hattori

    IPC分类号： B01D53/86 ,  B01D53/94 ,  B01D53/96 ,  B01J23/92 ,  B01J38/60 ,  B01J27/28

    CPC分类号： B01J23/92 ,  B01D53/8625 ,  B01J38/60 ,  Y02C20/30

    摘要： Disclosed are (1) a method for the regeneration of a denitration catalyst wherein, in order to regenerate a denitration catalyst having reduced denitration power, the catalyst is cleaned with a cleaning fluid having a hydrofluoric acid concentration of 0.3 to 3% by weight and maintained at a temperature of 20 to 80.degree. C., and (2) a method for the regeneration of a denitration catalyst which comprises the steps of cleaning a denitration catalyst having reduced denitration power under the conditions described in (1) above, drying the cleaned catalyst, and impregnating the catalyst with a catalytically active component so as to support it on the catalyst.

    摘要翻译： 公开了（1）一种用于再生脱硝催化剂的方法，其中为了再生具有降低的脱硝功率的脱硝催化剂，用具有0.3至3重量％的氢氟酸浓度的清洁流体清洁催化剂，并保持 温度为20〜80℃，（2）脱硝催化剂的再生方法，其特征在于，在上述（1）所述的条件下，对具有降低的脱硝功率的脱硝催化剂进行清洗， 催化剂，并用催化活性组分浸渍催化剂以便将其载于催化剂上。

    Nitrogen oxide removal catalyst
    3.
    发明授权
    Nitrogen oxide removal catalyst 失效
    氧化氮去除催化剂

    公开(公告)号：US5869419A

    公开(公告)日：1999-02-09

    申请号：US871520

    申请日：1997-06-09

    申请人： Yoshiaki Obayashi ,  Kozo Iida ,  Shigeru Nojima ,  Atsushi Morii ,  Osamu Naito

    发明人： Yoshiaki Obayashi ,  Kozo Iida ,  Shigeru Nojima ,  Atsushi Morii ,  Osamu Naito

    IPC分类号： B01D53/86 ,  B01D53/94 ,  B01D53/96 ,  B01J23/30 ,  B01J37/02 ,  B01J38/00 ,  B01J23/00 ,  B01J8/00 ,  B01J23/16

    CPC分类号： B01J38/00 ,  B01D53/8628 ,  B01D53/8631 ,  B01J23/30 ,  B01J37/0244

    摘要： This invention effectively utilizes a solid type honeycomb-shaped NO.sub.x removal catalyst which has been used in a catalytic ammonia reduction process and hence reduced in NO.sub.x removal power, and thereby provides an inexpensive catalyst having NO.sub.x removal power equal to that of a fresh catalyst. The nitrogen oxide removal catalyst of this invention, which is useful in a process wherein ammonia is added to exhaust gas and nitrogen oxides present in the exhaust gas are catalytically reduced, has a two-layer structure composed of a lower layer comprising a spent solid type nitrogen oxide removal catalyst and an upper layer comprising a fresh TiO.sub.2 -WO.sub.3 -V.sub.2 O.sub.5 ternary or TiO.sub.2 -WO.sub.3 binary catalyst powder which has been applied to the lower layer so as to give a coating thickness of 100 to 250 .mu.m. Moreover, the catalyst power constituting the upper layer is a catalyst powder obtained by pulverizing a spent solid type nitrogen oxide removal catalyst.

    摘要翻译： 本发明有效地利用了催化氨还原方法中使用的固体型蜂窝状NOx去除催化剂，从而降低了NOx去除能力，从而提供了具有等于新鲜催化剂的NOx去除功率的便宜的催化剂。 本发明的氮氧化物去除催化剂可用于将排放气体中存在氨和排出气体中存在的氮氧化物的方法进行催化还原的方法中，具有由下层构成的二层结构，该下层由废固体型 氮氧化物去除催化剂和上层，其包含新的TiO 2 -WO 3-V 2 O 5三元或TiO 2 -WO 3二元催化剂粉末，其被施加到下层以使涂层厚度为100-250μm。 此外，构成上层的催化剂功率是通过粉碎废固体型氮氧化物去除催化剂而获得的催化剂粉末。

    Methods of denitrating exhaust gases
    4.
    发明授权
    Methods of denitrating exhaust gases 失效
    废气排放方法

    公开(公告)号：US6080376A

    公开(公告)日：2000-06-27

    申请号：US988116

    申请日：1997-12-10

    申请人： Kouzo Iida ,  Shigeru Nojima ,  Yoshiaki Obayashi ,  Norihisa Kobayashi ,  Satoru Serizawa

    发明人： Kouzo Iida ,  Shigeru Nojima ,  Yoshiaki Obayashi ,  Norihisa Kobayashi ,  Satoru Serizawa

    IPC分类号： B01D53/86 ,  B01J29/04 ,  B01J29/06 ,  C01B21/00

    CPC分类号： B01D53/8625 ,  B01D53/8628 ,  B01D53/8634 ,  B01J29/04 ,  B01J29/061

    摘要： A method of denitrating an exhaust gas by means of removing nitrogen oxides catalytically using ammonia as a reducing agent while introducing an exhaust gas containing the nitrogen oxides into a reaction vessel packed with a catalyst, comprising:providing a denitration catalyst layer in the upstream of the gas flow, an ammonia decomposition catalyst layer capable of decomposing oxidatively ammonia into nitrogen and nitrogen oxides in the downstream and a second denitration catalyst layer or a denitration catalyst layer capable of decomposing ammonia in the further downstream; and,adding ammonia in an amount not less than the reaction equivalence for the nitrogen oxides in the exhaust gas to the inlet of the first denitration catalyst layer.

    摘要翻译： 一种通过使用氨作为还原剂催化除去氮氧化物，同时将含有氮氧化物的废气引入填充有催化剂的反应容器中来对废气进行脱硝的方法，包括：在所述催化剂的上游提供脱硝催化剂层 气流，能够将氧化性氨分解成下游的氮和氮氧化物的氨分解催化剂层和能够在下游分解氨的第二脱硝催化剂层或脱硝催化剂层; 并且将不少于排气中的氮氧化物的反应当量的氨加入到第一脱硝催化剂层的入口。

    Method of denitrating exhaust gas
    6.
    发明授权
    Method of denitrating exhaust gas 有权
    废气排放方法

    公开(公告)号：US06479026B1

    公开(公告)日：2002-11-12

    申请号：US09405535

    申请日：1999-09-24

    申请人： Kozo Iida ,  Shigeru Nojima ,  Yoshiaki Obayashi ,  Atsushi Morii

    发明人： Kozo Iida ,  Shigeru Nojima ,  Yoshiaki Obayashi ,  Atsushi Morii

    IPC分类号： B01D5356

    CPC分类号： B01D53/8625 ,  B01D53/8628 ,  B01D53/8634

    摘要： The present invention provides a method of denitrating exhaust gas, which can control the NOx removal efficiency of exhaust gas at 90% or higher while suppressing the release of unreacted ammonia to 0.1 ppm or less. The method carries out denitration of exhaust gas for removing nitrogen oxides with catalytic reduction by introducing a nitrogen-oxide-containing gas into a catalyst-filled reaction chamber and adding ammonia as reducing agent in an excessive amount to the same chamber. The method comprises the steps of: introducing exhaust gas and ammonia into a first denitrating catalyst layer disposed on the most upstream side in the gas stream to remove nitrogen oxides; supplying the gas into a first ammonia decomposing catalyst layer disposed on the downstream side of the first denitrating catalyst layer to control the ammonia content to be suitable for the subsequent denitrating process, the first ammonia decomposing catalyst layer having ability to oxidatively decompose unreacted ammonia into nitrogen and nitrogen oxides; then supplying the gas into a second denitrating catalyst layer disposed on the downstream side of the first ammonia decomposing catalyst layer; thereafter supplying the gas into a second ammonia decomposing catalyst layer disposed on the most downstream side to remove the residual ammonia, the second ammonia decomposing catalyst layer being provided with a catalyst which can oxidatively decompose the residual ammonia into nitrogen and nitrogen oxides or a catalyst which can oxidatively decompose the residual ammonia into nitrogen oxides.

    摘要翻译： 本发明提供一种排气废气的方法，其可以将废气的NOx去除效率控制在90％以上，同时将未反应氨的释放抑制在0.1ppm以下。 该方法通过将含氮氧化物的气体引入填充有催化剂的反应室中并且将氨作为还原剂过量加入到相同的室中，通过催化还原来进行用于除去氮氧化物的废气的脱硝。 该方法包括以下步骤：将排气和氨引入设置在气流中最上游侧的第一脱硝催化剂层中以除去氮氧化物; 将气体供给到设置在第一脱硝催化剂层的下游侧的第一氨分解催化剂层，以控制氨含量适合于随后的脱硝工艺，第一氨分解催化剂层具有将未反应的氨氧化分解成氮的能力 和氮氧化物; 然后将气体供给到设置在第一氨分解催化剂层的下游侧的第二脱硝催化剂层中; 然后将气体供给到设置在最下游侧的第二氨分解催化剂层以除去残留的氨，第二氨分解催化剂层设置有可将残留的氨氧化分解成氮和氮氧化物的催化剂或催化剂， 可以将残留的氨氧化分解成氮氧化物。

    Gas turbine single plant modifying method, a catalyst re-using method and a re-produced catalyst
    8.
    发明授权
    Gas turbine single plant modifying method, a catalyst re-using method and a re-produced catalyst 有权
    燃气轮机单厂改造方法，催化剂再利用方法和再生催化剂

    公开(公告)号：US07316988B2

    公开(公告)日：2008-01-08

    申请号：US10405618

    申请日：2003-04-03

    申请人： Hitoshi Nakamura ,  Norihisa Kobayashi ,  Kozo Iida ,  Osamu Naito ,  Yoshiaki Obayashi

    发明人： Hitoshi Nakamura ,  Norihisa Kobayashi ,  Kozo Iida ,  Osamu Naito ,  Yoshiaki Obayashi

    IPC分类号： B01J23/00 ,  B01J23/24 ,  B01J21/00

    CPC分类号： B01J23/92 ,  B01D53/8628 ,  B01D53/96 ,  B01J38/485 ,  F01K23/10 ,  Y02E20/16

    摘要： A high temperature denitration catalyst of a gas turbine single plant contains TiO2, at least one of WO3 and MoO3 and V2O5 of 0.5 wt % or less, preferably 0.2 wt % or less, or none of V2O5, and is optimized to be used in a temperature range up to a maximum 450 to 600° C. The used high temperature denitration catalyst is immersed into a V-containing water solution and dried and/or burned. An intermediate temperature denitration catalyst is produced containing a V2O5 component of 0.5 wt % or more, preferably 1.0 wt % or more, and is optimized for use in a temperature range of 250 to 450° C. This intermediate temperature denitration catalyst is re-used in a combined cycle plant after being modified or in other plants.

    摘要翻译： 燃气轮机单一工厂的高温脱硝催化剂含有TiO 2，WO 3 3和MoO 3 3和V 3中的至少一个， 0.5重量％以下，优选0.2重量％以下，或者不是V 2 O 5 O 5， 并优化为在最高达450至600℃的温度范围内使用。将所使用的高温脱硝催化剂浸入含V的水溶液中并干燥和/或燃烧。 制备含有0.5重量％以上，优选1.0重量％以上的V 2 O 5 O 5成分的中间温度脱硝催化剂，优选用于温度 范围为250至450℃。该中间温度脱硝催化剂在经修改后或在其它工厂中再次用于联合循环设备中。

    Exhaust gas treatment catalyst and exhaust gas treatment system
    10.
    发明授权
    Exhaust gas treatment catalyst and exhaust gas treatment system 有权
    废气处理催化剂和废气处理系统

    公开(公告)号：US08202481B2

    公开(公告)日：2012-06-19

    申请号：US12523770

    申请日：2008-08-07

    申请人： Katsumi Nochi ,  Yoshiaki Obayashi ,  Akira Hattori

    发明人： Katsumi Nochi ,  Yoshiaki Obayashi ,  Akira Hattori

    IPC分类号： B01D50/00

    CPC分类号： B01D53/8628 ,  B01D53/8634 ,  B01D2251/2062 ,  B01D2255/1021 ,  B01D2255/20707 ,  B01D2255/20723 ,  B01D2255/20769 ,  B01D2255/20776 ,  B01J21/063 ,  B01J23/30 ,  B01J23/6482 ,  B01J23/6525 ,  B01J23/6527 ,  B01J35/023 ,  B01J35/04 ,  B01J35/08 ,  B01J37/0009 ,  B01J37/0036 ,  B01J37/0248

    摘要： Provided are an exhaust gas treatment catalyst capable of reducing ammonia leakage rate while keeping a sufficient NOx removal efficiency, said catalyst comprising a coating layer and a catalyst base material, wherein said coating layer has a decreased thickness relative to that of a catalyst base material; and an exhaust gas treatment system using the same. In the exhaust gas treatment catalyst for catalytically removing nitrogen oxides from an exhaust gas by using ammonia as a reducing agent and simultaneously decomposing and removing unreacted ammonia, a coating layer comprising platinum supported on titania is formed on a surface of a porous catalyst base material comprising titania and at least one compound selected from oxides of vanadium (V), oxides of tungsten (W) and oxides of molybdenum (Mo).

    摘要翻译： 提供了能够在保持足够的NOx去除效率的同时降低氨泄漏速率的废气处理催化剂，所述催化剂包括涂层和催化剂基材，其中所述涂层相对于催化剂基材的厚度减小; 以及使用该废气处理系统的废气处理系统。 在通过使用氨作为还原剂并且同时分解和除去未反应的氨来从废气中催化除去氮氧化物的废气处理催化剂中，在多孔催化剂基材的表面上形成包含负载在二氧化钛上的铂的涂层， 二氧化钛和选自钒（V​​），钨（W）和钼（Mo）的氧化物的氧化物的至少一种化合物。