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公开(公告)号：US5271913A
公开(公告)日：1993-12-21
申请号：US961116
申请日：1992-10-14
申请人： Kouza Iida , Yoshiaki Obayashi , Satoru Serizawa
发明人： Kouza Iida , Yoshiaki Obayashi , Satoru Serizawa
CPC分类号： B01J29/46 , B01D53/8628
摘要： A denitration catalyst for a high-temperature exhaust gas which is used to catalytically reduce and remove nitrogen oxides in the reaction temperature range of from 500.degree. to 700.degree. C. in the process of adding an ammonia gas to the exhaust gas containing the nitrogen oxides, the aforesaid catalyst being characterized by carrying 0.5 to 10% by weight of cerium in terms of Ce.sub.2 O.sub.3 or 0.5 to 5% by weight of iron in terms of Fe.sub.2 O.sub.3 on a high silica type zeolite in which the molar ratio of SiO.sub.2 /Al.sub.2 O.sub.3 is 20 or more.
摘要翻译： 在向含有氮氧化物的废气中加入氨气的过程中，用于高温废气的脱硝催化剂用于催化还原和除去在500〜700℃的反应温度范围内的氮氧化物 上述催化剂的特征在于，以SiO 2 / Al 2 O 3的摩尔比为20的高二氧化硅型沸石，以Ce2O3为0.5〜10重量％的铈或0.5〜5重量％的以Fe 2 O 3换算的铁 或者更多。
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公开(公告)号：US6080376A
公开(公告)日：2000-06-27
申请号：US988116
申请日：1997-12-10
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。
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公开(公告)号：US5728356A
公开(公告)日：1998-03-17
申请号：US508174
申请日：1995-07-27
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.
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公开(公告)号：US5677254A
公开(公告)日：1997-10-14
申请号：US665820
申请日：1996-06-19
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。
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公开(公告)号：US5738832A
公开(公告)日：1998-04-14
申请号：US621704
申请日：1996-03-26
申请人： Takashi Dogahara , Kazuo Koga , Yoshiaki Danno , Daisuke Sanbayashi , Kozo Iida , Satoru Serizawa , Norihisa Kobayashi
发明人： Takashi Dogahara , Kazuo Koga , Yoshiaki Danno , Daisuke Sanbayashi , Kozo Iida , Satoru Serizawa , Norihisa Kobayashi
CPC分类号： B01D53/9481 , B01D53/9495 , F01N13/009 , F01N3/0835 , F01N3/0878 , F01N3/2053 , F01N9/00 , F01N2250/12 , F01N2410/12 , Y02T10/20 , Y02T10/47
摘要： An exhaust gas purifying apparatus, which is intended to improve hydrocarbon purifying performance and simplify the after-treatment of adsorbed hydrocarbon, an in which a three way valve 51 is operated under the control of a controller 80 to cause a bypass exhaust gas passage 30 to be communicated with a main exhaust gas passage, so that hydrocarbon in exhaust gas is adsorbed onto an adsorption catalyst 40 when the temperature of a three way catalyst 20 in the main exhaust gas passage 13 is low. When the three way catalyst temperature increases, the bypass exhaust gas passage is shut off from the main exhaust gas passage by the three way valve and the adsorption catalyst is heated by a heater 60, so that the adsorbed hydrocarbon is oxidized at the adsorption catalyst to form a harmless substance.
摘要翻译： 一种排气净化装置，其旨在提高烃净化性能并简化吸附的烃的后处理，其中三通阀51在控制器80的控制下操作以使旁路废气通道30 与主废气通道连通，当主排气通路13中的三元催化剂20的温度低时，废气中的烃被吸附到吸附催化剂40上。 当三元催化剂温度升高时，通过三通阀将旁路废气通道从主排气通道切断，并且吸附催化剂被加热器60加热，使得吸附的烃在吸附催化剂下氧化成 形成无害物质。
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公开(公告)号：US5679314A
公开(公告)日：1997-10-21
申请号：US500234
申请日：1995-07-10
申请人： Atsushi Morii , Satoru Serizawa , Osamu Naito , Toshiyuki Onishi , Kouzo Iida
发明人： Atsushi Morii , Satoru Serizawa , Osamu Naito , Toshiyuki Onishi , Kouzo Iida
CPC分类号： B01D53/8625 , B01J20/06 , B01J20/08 , B01J20/18 , B01J20/3408 , B01J20/3433 , B01J20/3458 , B01J20/3483
摘要： A method for recovering an ammonia adsorbent which comprises streaming an NO.sub.x -containing gas at 300.degree.-600.degree. C. through an ammonia adsorbent layer which adsorbs ammonia and which is saturated with ammonia.
摘要翻译： 一种用于回收氨吸附剂的方法，其包括在300-600℃下通过吸附氨并被氨饱和的氨吸附剂层流动含氮气体。
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公开(公告)号：US5897687A
公开(公告)日：1999-04-27
申请号：US546102
申请日：1995-10-20
申请人： Teruko Shimada , Toshiyuki Onishi , Satoru Serizawa , Atsushi Morii , Osamu Naito , Shigeyuki Nishijima
发明人： Teruko Shimada , Toshiyuki Onishi , Satoru Serizawa , Atsushi Morii , Osamu Naito , Shigeyuki Nishijima
CPC分类号： B01D53/0462 , B01D53/8631 , B01D2257/406 , B01D2259/40056 , B01D2259/40081 , B01D2259/4009 , B01D2259/402
摘要： Disclosed is an ammonia adsorption apparatus for removing ammonia contained in a treated gas discharged from a denitrator for decomposing nitrogen oxides present in exhaust gas using ammonia as a reducing agent, comprising at least two adsorption towers into which ammonia-containing exhaust gas is introduced in a vertical direction for removing the ammonia by adsorption, wherein, during regeneration of each adsorption tower, hot gas used for desorption purposes flows from a top toward a bottom of the adsorption tower and cooling gas flows from the bottom toward the top of the adsorption tower.
摘要翻译： 公开了一种氨吸附装置，用于除氨中排出的处理气体中所含的氨，其中所述处理气体用于使用氨作为还原剂分解废气中存在的氮氧化物，所述脱氮器包括至少两个吸附塔，所述吸附塔中含有氨的废气被引入到 通过吸附除去氨的垂直方向，其中，在每个吸附塔的再生期间，用于解吸目的的热气从吸附塔的顶部向底部流动，冷却气体从吸附塔的底部向顶部流动。
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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
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。
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公开(公告)号：US5431894A
公开(公告)日：1995-07-11
申请号：US105739
申请日：1993-08-12
申请人： Toshiyuki Onishi , Shozo Kaneko , Satoru Serizawa , Toshihiko Imamoto , Atsushi Morii , Osamu Naito
发明人： Toshiyuki Onishi , Shozo Kaneko , Satoru Serizawa , Toshihiko Imamoto , Atsushi Morii , Osamu Naito
CPC分类号： F01N3/2066 , B01D53/8631 , B01F3/04056 , B01F5/0456 , B01F5/0463 , F01N2610/02 , F01N2610/1453 , Y02C20/10 , Y02T10/24
摘要： A method for denitrating an exhaust gas is disclosed which comprises the steps of injecting ammonia from an ammonia injection device into a high-temperature exhaust gas containing nitrogen oxides in a temperature range of 480.degree. C. or more, and then bringing a mixture of ammonia and the high-temperature exhaust gas into contact with a denitration catalyst to reduce the mixture, said method being characterized in that ammonia is injected through the ammonia injection device in which at least an inner surface is subjected to an aluminizing treatment, whereby ammonia is prevented from decomposing; and an apparatus for denitrating an exhaust gas is also disclosed.
摘要翻译： 公开了一种用于脱气废气的方法，其包括将氨从氨注入装置注入到含有氮氧化物的高温废气中的步骤，所述高温废气在480℃或更高的温度范围内，然后将氨的混合物 所述高温废气与脱硝催化剂接触以减少混合物，所述方法的特征在于通过至少内表面进行镀铝处理的氨注入装置注入氨，从而防止氨 从分解 还公开了一种用于脱气废气的设备。
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