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    Nitrogen oxide removal catalyst
    2.
    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。

    Method of denitrating exhaust gas
    3.
    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。

    Catalyst for purifying an exhaust gas
    4.
    发明授权
    Catalyst for purifying an exhaust gas 失效
    用于净化废气的催化剂

    公开(公告)号：US5677254A

    公开(公告)日：1997-10-14

    申请号：US665820

    申请日：1996-06-19

    申请人： Shigeru Nojima ,  Kozo Iida ,  Norihisa Kobayashi ,  Satoru Serizawa ,  Atsushi Morii

    发明人： Shigeru Nojima ,  Kozo Iida ,  Norihisa Kobayashi ,  Satoru Serizawa ,  Atsushi Morii

    IPC分类号： B01J29/04 ,  B01J29/88 ,  B01J29/46 ,  B01J29/48

    CPC分类号： B01J29/88 ,  B01J29/04

    摘要： This invention relates to a catalyst for purifying an exhaust gas, which has a denitrification property in the lean atmosphere and good durability and is hardly deteriorated even in a high temperature rich atmosphere. The feature thereof consists in a catalyst for purifying an exhaust gas, comprising a crystalline silicate having the specified X-ray diffraction pattern and a chemical composition represented by the following chemical formula in the term of mole ratios of oxides under dehydrated state, (1.+-.0.8)R.sub.2 O.�aM.sub.2 O.sub.3.bM'O.cAl.sub.2 O.sub.3 !.ySiO.sub.2 in which R is at least one of alkali metal ions and hydrogen ion, M is at least one elementary ion selected from the group consisting of Group VIII elements of Periodic Table, rare earth elements, titanium, vanadium, chromium, niobium, antimony and gallium, M' is an alkaline earth metal ion selected from magnesium, calcium, strontium and barium ions, a>0, 20>b.gtoreq.0, a+c=1 and 3000>y>11, on which (I) at least one member selected from platinum group metals and (II) at least one metal selected from platinum group metals and at least one metal selected from the group consisting of rare earth elements are supported.

    摘要翻译： 本发明涉及一种排气净化用催化剂，其在贫气氛下具有脱氮性，耐久性良好，即使在高温环境下也难以劣化。 其特征在于，用于净化废气的催化剂，包括具有规定的X射线衍射图的结晶硅酸盐和由脱水状态的氧化物的摩尔比表示的以下化学式表示的化学组成，（1+ /0.8)R2O.Am2O3.bM'O.cAl2O3.p.SiO2，其中R是碱金属离子和氢离子中的至少一种，M是至少一种选自元素周期的VIII族元素的元素离子 表，稀土元素，钛，钒，铬，铌，锑和镓，M'是选自镁，钙，锶和钡离子的碱土金属离子，a> 0,20> b> / = 0，a + c = 1和3000> y> 11，其中（I）选自铂族金属中的至少一种和（II）选自铂族金属中的至少一种金属和选自稀有金属中的至少一种金属 支持地球元素。

    Method for the regeneration of a denitration catalyst
    5.
    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。

    Rectifying device
    8.
    发明授权
    Rectifying device 失效
    整流装置

    公开(公告)号：US5680884A

    公开(公告)日：1997-10-28

    申请号：US639999

    申请日：1996-04-30

    申请人： Shigeyuki Nishijima ,  Masaaki Taniguchi ,  Atsushi Morii ,  Osamu Naito

    发明人： Shigeyuki Nishijima ,  Masaaki Taniguchi ,  Atsushi Morii ,  Osamu Naito

    IPC分类号： F15D1/02 ,  B01D53/34 ,  B01F5/06 ,  B01J19/24 ,  B01J19/32

    CPC分类号： B01J19/32 ,  B01F5/061 ,  B01F5/0614 ,  B01J19/24 ,  B01J2219/00072 ,  B01J2219/32286 ,  B01J2219/32293 ,  B01J2219/32296 ,  B01J2219/326

    摘要： A high-performance rectifying device promotes the diffusion of energy, temperature and concentration in a fluid stream with a small pressure loss. The device is a lattice type rectifying device provided within a fluid flow passageway for equalizing the flow velocity distribution of the same fluid. Lattice elements each consist of two triangular plates disposed so as to form two opposed surfaces of a pyramid having its apex on the downstream side of the fluid flow and two other triangular plates forming two opposed surfaces of another pyramid having its apex jointed with the first-mentioned apex and having its bottom surface positioned on the downstream side of the fluid flow. The latter two opposed surfaces have their orientations deviated by 90 degrees from the two opposed surfaces on the upstream side. The lattice elements are arrayed in juxtaposition in directions perpendicular to the fluid flow with the orientation of adjacent lattice elements deviated by 90 degrees from each other and are connected in such a manner that the bottom surfaces of the above-mentioned pyramids may form a lattice. Furthermore the ratio of the length, in a direction parallel to the flow, of the lattice element to the breadth, in the direction perpendicular to the flow, of the lattice element should be kept in a range of 1.5-2.0. The lattice element may also be formed of a rectangular plate twisted by 90 degrees in the direction along the direction of the fluid flow.

    摘要翻译： 高性能整流装置促进能量，温度和浓度在流体流中的扩散，压力损失小。 该装置是设置在流体流动通道内用于均衡相同流体的流速分布的格子式整流装置。 晶格元件由两个三角形板组成，两个三角形板被设置成在流体流动的下游侧形成具有顶点的金字塔的两个相对表面，另外两个三角形板形成另一个金字塔的相对表面，其另一个金字塔的顶点与第一 - 并且其底表面位于流体流的下游侧。 后两个相对的表面具有从上游侧的两个相对表面偏离90度的方向。 晶格元素在垂直于流体流动的方向上并列排列，其中相邻晶格元素的取向相互偏离90度，并以上述棱锥的底表面形成晶格的方式连接。 此外，在晶格元素的与流动方向垂直的方向上的平行于流动的方向上的晶格长度与宽度的比例应保持在1.5-2.0的范围内。 格子元件也可以由沿流体流动方向的方向扭转90度的矩形板形成。

    Method for the denitration of exhaust gas
    10.
    发明授权
    Method for the denitration of exhaust gas 失效
    废气脱硝方法

    公开(公告)号：US5505919A

    公开(公告)日：1996-04-09

    申请号：US282962

    申请日：1994-07-29

    申请人： Atsushi Morii ,  Satoru Serizawa ,  Osamu Naito ,  Masanori Demoto ,  Toshiyuki Onishi ,  Norihisa Kobayashi ,  Kouzo Iida

    发明人： Atsushi Morii ,  Satoru Serizawa ,  Osamu Naito ,  Masanori Demoto ,  Toshiyuki Onishi ,  Norihisa Kobayashi ,  Kouzo Iida

    IPC分类号： B01D53/86 ,  B01D53/94 ,  F01N3/08 ,  B01J8/02

    CPC分类号： B01D53/8625 ,  B01D53/8628 ,  Y02C20/10

    摘要： A method for the denitration of exhaust gas from a gas turbine or an internal combustion engine which comprises (a) reducing a part of the NO.sub.2 constituting NO.sub.x contained in the exhaust gas to NO by means of a reduction catalyst bed for reducing NO.sub.2 to NO, the reduction catalyst bed being installed in flow communication with the exhaust gas outlet of the gas turbine or internal combustion engine, and (b) injecting NH.sub.3 into the exhaust gas within an exhaust heat recovery unit and then decomposing and removing NO.sub.x contained in the exhaust gas and now composed chiefly of NO, by means a denitration catalyst bed installed within the exhaust heat recovery unit to effect the catalytic reduction of NO.sub.x with NH.sub.3.

    摘要翻译： 一种用于从燃气轮机或内燃机脱硝废气的方法，该方法包括：（a）通过用于将NO 2还原为NO的还原催化剂床将排气中所含的构成NO 2的NO 2的一部分还原为NO， 所述还原催化剂床安装成与所述燃气轮机或内燃机的排气出口流动连通，以及（b）将NH 3喷射到排气热回收单元内的废气中，然后分解和除去废气中所含的NOx 现在主要由NO组成，通过设置在废热回收装置内的脱硝催化剂床，以实现用NH 3催化还原NOx。