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9 条记录 (耗时 0.018 秒)

    Method for removing NOx
    1.
    发明授权
    Method for removing NOx 有权
    NOx去除方法

    公开(公告)号：US06423283B1

    公开(公告)日：2002-07-23

    申请号：US09623797

    申请日：2000-09-08

    申请人： Masayoshi Ichiki ,  Masaki Akiyama ,  Atsushi Fukuju

    发明人： Masayoshi Ichiki ,  Masaki Akiyama ,  Atsushi Fukuju

    IPC分类号： B01J800

    CPC分类号： B01D53/8625 ,  Y02A50/2345 ,  Y02C20/10

    摘要： The invention provides a process for removing NOx which is free of impairment in denitration efficiency at a reaction temperature of up to 300° C. even when the component molar ratio of NOx in the gas to be treated is NO2>NO. For use in removing NOx from the gas to be treated and containing NO2 in a larger amount than NO, that is, having a (NO2)/NOx ratio in excess of 0.5, by selective reduction with use of ammonia serving as a main reducing agent in the presence of a denitration catalyst, the process of the invention for removing NOx comprises adding to the denitration reaction system a substance for removing an excess of oxygen accumulating on catalyst active sites by selectively reducing the oxygen at not higher than 300° C., for example, at 300 to 150° C., in other words, a substance which reacts with the excess of oxygen on the catalyst active sites and becomes oxidized at not higher than 300° C.

    摘要翻译： 本发明提供一种除去在300℃以下的反应温度下脱硝效率不受损害的NOx的方法，即使待处理气体中的NOx的成分摩尔比为NO2> NO。 用于从待处理的气体中除去NO含量大于NO的NO 2，即NO 2 / NOx比超过0.5时，通过使用氨作为主要还原剂进行选择性还原 在脱硝催化剂的存在下，本发明除去NOx的方法包括向脱硝反应体系中加入一种物质，用于通过选择性地将氧气在不高于300℃下还原，除去积聚在催化剂活性位上的过量氧， 例如，在300〜150℃，换句话说，与催化剂活性部位上的过量氧反应并在不高于300℃下氧化的物质。

    Method of Regenerating Thermally Deteriorated Catalyst
    5.
    发明申请
    Method of Regenerating Thermally Deteriorated Catalyst 审中-公开
    再生热劣化催化剂的方法

    公开(公告)号：US20080248943A1

    公开(公告)日：2008-10-09

    申请号：US10572310

    申请日：2004-09-21

    申请人： Atsushi Fukuju ,  Masayoshi Ichiki ,  Kazuhiro Yano

    发明人： Atsushi Fukuju ,  Masayoshi Ichiki ,  Kazuhiro Yano

    IPC分类号： B01J38/68

    CPC分类号： B01J23/22 ,  B01D53/96 ,  B01D2255/20723 ,  B01J23/30 ,  B01J23/92 ,  B01J38/60 ,  B01J38/66 ,  B01J38/68

    摘要： A catalyst that is used for a method of reduction removal of NOx in a exhaust gas by using ammonia as a reducing agent and has been deteriorated in activity by aggregation of vanadium oxide as an active component through long term use at a high temperature is washed with an acid aqueous solution having pH of 6 or less, and preferably 4 or less. The washing operation dissolves and removes away mainly the vanadium oxide as the aggregated active component, and then vanadium oxide as the active component is re-deposited thereon. The method of the invention enables regeneration of a thermally deteriorated catalyst, which has conventionally been impossible. The washing operation with the acid aqueous solution or an alkali aqueous solution does not influence the mechanical strength of the catalyst.

    摘要翻译： 一种催化剂，其用于通过使用氨作为还原剂还原除去废气中的NO x的方法，并且通过长期凝聚氧化钒作为活性成分而使活性降低 在高温下使用的pH为6以下，优选为4以下的酸性水溶液洗涤。 洗涤操作主要溶解并除去作为聚集的活性组分的氧化钒，然后将作为活性组分的氧化钒再沉积在其上。 本发明的方法能够再生传统上不可能的热劣化催化剂。 用酸性水溶液或碱性水溶液进行洗涤操作不影响催化剂的机械强度。

    Method of regenerating deteriorated catalyst
    6.
    发明申请
    Method of regenerating deteriorated catalyst 审中-公开
    再生劣化催化剂的方法

    公开(公告)号：US20070032373A1

    公开(公告)日：2007-02-08

    申请号：US10572311

    申请日：2004-09-21

    申请人： Nobuo Matsumoto ,  Tetsuo Kodama ,  Atsushi Fukuju ,  Masayoshi Ichiki ,  Kazuhiro Yano

    发明人： Nobuo Matsumoto ,  Tetsuo Kodama ,  Atsushi Fukuju ,  Masayoshi Ichiki ,  Kazuhiro Yano

    IPC分类号： B01J38/00

    CPC分类号： B01J38/60 ,  B01D53/8628 ,  B01D53/96 ,  B01D2255/20723 ,  B01D2255/20776 ,  B01J23/92

    摘要： The invention is to provide a method for regenerating a deteriorated denitration catalyst by an easy and simple procedure. A catalyst that is used for reduction removal of NOx contained in a exhaust gas by using ammonia as a reducing agent and has been deteriorated in activity through long term use is washed with an acid aqueous solution having pH of 4 or less, and preferably 2 or less, containing vanadium and/or tungsten. The washing operation dissolves away mainly an alkali metal, an alkaline earth metal, arsenic and sulfur, which are deteriorating components, and vanadium and tungsten having been deteriorated in activity, and simultaneously vanadium and/or tungsten as an active component is deposited thereon. Examples of the alkali metal include potassium and sodium, and examples of the alkaline earth metal include calcium.

    摘要翻译： 本发明提供一种通过简单且简单的方法再生劣化脱硝催化剂的方法。 通过使用氨作为还原剂并且通过长期使用而使活性劣化的用于还原除去废气中的NO x的催化剂用pH为 4以下，优选为2以下，含有钒和/或钨。 洗涤操作主要消除作为劣化组分的碱金属，碱土金属，砷和硫，活性劣化的钒和钨，同时沉积作为活性组分的钒和/或钨。 碱金属的实例包括钾和钠，碱土金属的实例包括钙。

    NOx adsorbents
    7.
    发明授权
    NOx adsorbents 失效
    NOx吸附剂

    公开(公告)号：US5840649A

    公开(公告)日：1998-11-24

    申请号：US588882

    申请日：1996-01-19

    申请人： Masayoshi Ichiki ,  Yuki Sairyo ,  Kazuhiro Kondo ,  Atsushi Fukuju

    发明人： Masayoshi Ichiki ,  Yuki Sairyo ,  Kazuhiro Kondo ,  Atsushi Fukuju

    IPC分类号： B01D53/02 ,  B01D53/04 ,  B01J23/32 ,  B01J8/00 ,  B01J23/40

    CPC分类号： B01D53/02 ,  B01D2253/112 ,  B01D2253/306 ,  B01D2257/404 ,  B01D2257/80

    摘要： The present invention relates to a Mn-added titania carrier obtained by adding a Mn salt to amorphous titania and baking the titania. The invention also relates to an NOx adsorbent comprising the above-mentioned titania carrier and adsorbing components comprising oxides of Ru and/or Ce supported on the carrier. The invention also relates to an NOx adsorbent comprising the above-mentioned titania carrier and adsorbing components comprising oxides of Ru and/or Ce and an oxide of at least one metal among Ag, Cu and Mn supported on the carrier. The NOx adsorbents embodying the invention are effectively used for efficiently adsorbing and removing NOx from gases which contain much moisture and low-concentration, for example, a few ppm NOx such as gases discharged by ventilation from highway tunnels.

    摘要翻译： 本发明涉及通过向无定形二氧化钛中加入Mn盐并烘烤二氧化钛而获得的添加Mn的二氧化钛载体。 本发明还涉及包含上述二氧化钛载体的NOx吸附剂和包含负载在载体上的Ru和/或Ce的氧化物的吸附组分。 本发明还涉及包含上述二氧化钛载体的NOx吸附剂和包含Ru和/或Ce的氧化物的吸附组分和在载体上负载的Ag，Cu和Mn中的至少一种金属的氧化物。 实施本发明的NOx吸附剂有效地用于有效吸附和除去含有大量水分和低浓度的气体中的NOx，例如少量的NOx，例如通过公路隧道排放的气体。