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    Exhaust gas purification apparatus, exhaust gas purification method, and sulfur component trapping agent for internal combustion engine
    10.
    发明申请
    Exhaust gas purification apparatus, exhaust gas purification method, and sulfur component trapping agent for internal combustion engine 审中-公开
    废气净化装置，废气净化方法和内燃机用硫成分捕集剂

    公开(公告)号：US20070144143A1

    公开(公告)日：2007-06-28

    申请号：US10593494

    申请日：2004-03-24

    申请人： Masato Kaneeda ,  Hidehiro Iizuka ,  Kazutoshi Higashiyama ,  Yuichi Kitahara ,  Osamu Kuroda

    发明人： Masato Kaneeda ,  Hidehiro Iizuka ,  Kazutoshi Higashiyama ,  Yuichi Kitahara ,  Osamu Kuroda

    IPC分类号： F01N3/00 ,  F01N3/10 ,  F01N7/00

    CPC分类号： F01N3/0807 ,  F01N3/035 ,  F01N3/0814 ,  F01N3/0842 ,  F01N3/085 ,  F01N3/106 ,  F01N13/009 ,  F01N13/0097 ,  F01N2510/0682 ,  F01N2570/14 ,  Y02A50/2344 ,  Y02T10/24

    摘要： An object of the present invention is to provide a new exhaust gas purification apparatus for an internal combustion engine operated under a condition of an air fuel ratio leaner than a theoretical air fuel ratio, a method for purification of exhaust gas and an exhaust gas purification catalyst, which is suitable for suppressing degradation of the NOx purification catalyst by sulfur components. An exhaust gas purification apparatus for an internal combustion engine, which comprises an exhaust gas passage for an internal combustion engine into which exhaust gas of lean air fuel ratio and rich or stoichiometric air fuel ratio flows, a NOx trapping catalyst that functions to trap NOx in the exhaust gas when the air fuel ratio is lean, a sulfur component trapping agent for trapping sulfur components in the exhaust gas, which is disposed before the NOx trapping catalyst, and a catalyst for oxidizing the sulfur components, which is disposed before the sulfur component trapping agent, wherein the sulfur component trapping agent has a trapping rate of 85 % or more of an amount of inflow sulfur in a trapping test at a flow rate of 150 ppm SO3-5% O2—balance being N2 gas per 1.5 moles of the sulfur trapping agent at 300° C. and a space velocity of 30,000/h for 1 hour; and the sulfur component trapping agent has a release rate of sulfur amount of 5 % or less of sulfur trapped in the sulfur component trapping agent in a release test under a flow of a 3000 ppm H2-600 ppm C3H6-3000 ppm O2-3.5 % CO—balance being N2 gas at a temperature elevation rate of 10° C. /min from 250 to 750° C. at an sulfur component trapping agent entrance, after the trapping test.

    摘要翻译： 本发明的目的是提供一种在比理论空燃比稀薄的空气燃料比的条件下操作的内燃机的新型废气净化装置，废气净化方法和废气净化催化剂 ，其适用于通过硫成分抑制NOx净化催化剂的降解。 一种用于内燃机的废气净化装置，其包括用于内燃机的排气通道，稀燃空气排气和浓空气或化学计量空燃比流过的排气通道，用于捕集NOx的NOx捕集催化剂 在空燃比稀的情况下的废气，用于捕集在NOx捕集催化剂之前的排气中的硫成分的硫成分捕获剂和硫成分的氧化催化剂， 捕集剂，其中所述硫成分捕获剂在150ppm SO 3 -5％O的流量下捕获试验中的流入硫的捕获率为85％以上 > 2平衡物为N 2气体/ 300摩尔的捕集剂，300℃/ h的空速1小时; 并且在3,000ppm H 2 -200ppm的流量下，在脱模试验中，硫成分捕集剂的硫量的释放速率为硫成分捕获剂中捕集的硫的5％以下 C3H6-3000ppm O2-3.5％CO平衡为N 2气体，温度升高速率为10℃/ min，从250℃升至750℃， 一种硫成分捕获剂入口，经过捕集试验。