公开(公告)号：US08187995B2

公开(公告)日：2012-05-29

申请号：US12926786

申请日：2010-12-09

申请人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

发明人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

IPC分类号： B01J21/06 ,  B01J23/10 ,  C01G25/02 ,  C01B13/14 ,  C01F17/00 ,  F01N3/10

CPC分类号： C01G25/00 ,  B01D53/945 ,  B01D2255/407 ,  B01D2255/908 ,  B01J23/10 ,  B01J23/63 ,  B01J35/002 ,  B01J35/023 ,  B01J37/0036 ,  B01J37/0081 ,  B01J37/04 ,  C01P2002/72 ,  C01P2004/61 ,  C01P2004/62 ,  Y02T10/22

摘要： This invention relates to a cerium-zirconium-base composite oxide, which is useful, e.g., for the purification of exhaust gas discharged from combustion engines such as internal combustion engines and boilers and can release a high level of oxygen in a low temperature region, a method for producing the same, an oxygen storage/release component using the same, an exhaust gas purification catalyst, and an exhaust gas purification method. The cerium-zirconium-base composite oxide satisfies requirements (1) that the oxygen release initiation temperature is 380° C. or below, (2) that the oxygen release amount is not less than 485 μmol/g, and further (3) that the oxygen release amount at 400° C. is not less than 15 μmol/g. The cerium-zirconium-base composite oxide can be produced, for example, by mixing a starting material for cerium and a starting material for zirconium at a predetermined mixing ratio together, melting the starting material mixture at a temperature at or above the melting point, then cooling the melt to form an ingot, then optionally grinding the ingot to prepare powder, subsequently removing strain within powder crystal grains under heating, and then grinding to a further fine state.

摘要翻译： 本发明涉及一种铈 - 锆基复合氧化物，其可用于例如从内燃机和锅炉等内燃机排放的废气的净化，并可在低温区域释放高水平的氧气， 其制造方法，使用其的氧气储存/释放组分，废气净化催化剂和废气净化方法。 铈锆系复合氧化物满足氧释放开始温度为380℃以下的要求（1），（2）氧释放量为485μmol/ g以上，进一步（3） 在400℃下的氧释放量不小于15μmol/ g。 铈 - 锆基复合氧化物可以通过例如将铈原料和锆原料以预定的混合比混合在一起，在起始原料混合物在熔点以上的温度下熔融， 然后冷却熔体以形成锭，然后任选地研磨锭以制备粉末，随后在加热下除去粉末晶粒内的应变，然后研磨至更细的状态。

公开(公告)号：US20110171092A1

公开(公告)日：2011-07-14

申请号：US12926786

申请日：2010-12-09

申请人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

发明人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

IPC分类号： B01D53/94 ,  B01J21/06 ,  B01D53/62 ,  B01D53/72 ,  B01D53/56

CPC分类号： C01G25/00 ,  B01D53/945 ,  B01D2255/407 ,  B01D2255/908 ,  B01J23/10 ,  B01J23/63 ,  B01J35/002 ,  B01J35/023 ,  B01J37/0036 ,  B01J37/0081 ,  B01J37/04 ,  C01P2002/72 ,  C01P2004/61 ,  C01P2004/62 ,  Y02T10/22

摘要： This invention relates to a cerium—zirconium-base composite oxide, which is useful, e.g., for the purification of exhaust gas discharged from combustion engines such as internal combustion engines and boilers and can release a high level of oxygen in a low temperature region, a method for producing the same, an oxygen storage/release component using the same, an exhaust gas purification catalyst, and an exhaust gas purification method. The cerium—zirconium-base composite oxide satisfies requirements (1) that the oxygen release initiation temperature is 380° C. or below, (2) that the oxygen release amount is not less than 485 μmol/g, and further (3) that the oxygen release amount at 400° C. is not less than 15 μmol/g. The cerium—zirconium-base composite oxide can be produced, for example, by mixing a starting material for cerium and a starting material for zirconium at a predetermined mixing ratio together, melting the starting material mixture at a temperature at or above the melting point, then cooling the melt to form an ingot, then optionally grinding the ingot to prepare powder, subsequently removing strain within powder crystal grains under heating, and then grinding to a further fine state.

摘要翻译： 本发明涉及一种铈 - 锆基复合氧化物，其可用于例如从内燃机和锅炉等内燃机排放的废气的净化，并可在低温区域释放高水平的氧气， 其制造方法，使用其的氧气储存/释放组分，废气净化催化剂和废气净化方法。 铈锆系复合氧化物满足氧释放开始温度为380℃以下的要求（1），（2）氧释放量为485μmol/ g以上，进一步（3） 在400℃下的氧释放量不小于15μmol/ g。 铈 - 锆基复合氧化物可以通过例如将铈原料和锆原料以预定的混合比混合在一起，在起始原料混合物在熔点以上的温度下熔融， 然后冷却熔体以形成锭，然后任选地研磨锭以制备粉末，随后在加热下除去粉末晶粒内的应变，然后研磨至更细的状态。

公开(公告)号：US07871956B2

公开(公告)日：2011-01-18

申请号：US11717162

申请日：2007-03-13

申请人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

发明人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

IPC分类号： B01J21/06 ,  B01J23/10 ,  C01G25/02 ,  C01B13/14 ,  C01F17/00

CPC分类号： C01G25/00 ,  B01D53/945 ,  B01D2255/407 ,  B01D2255/908 ,  B01J23/10 ,  B01J23/63 ,  B01J35/002 ,  B01J35/023 ,  B01J37/0036 ,  B01J37/0081 ,  B01J37/04 ,  C01P2002/72 ,  C01P2004/61 ,  C01P2004/62 ,  Y02T10/22

摘要： This invention relates to a cerium-zirconium-base composite oxide, which is useful, e.g., for the purification of exhaust gas discharged from combustion engines such as internal combustion engines and boilers and can release a high level of oxygen in a low temperature region, a method for producing the same, an oxygen storage/release component using the same, an exhaust gas purification catalyst, and an exhaust gas purification method. The cerium-zirconium-base composite oxide satisfies requirements (1) that the oxygen release initiation temperature is 380° C. or below, (2) that the oxygen release amount is not less than 485 μmol/g, and further (3) that the oxygen release amount at 400° C. is not less than 15 μmol/g. The cerium-zirconium-base composite oxide can be produced, for example, by mixing a starting material for cerium and a starting material for zirconium at a predetermined mixing ratio together, melting the starting material mixture at a temperature at or above the melting point, then cooling the melt to form an ingot, then optionally grinding the ingot to prepare powder, subsequently removing strain within powder crystal grains under heating, and then grinding to a further fine state.

摘要翻译： 本发明涉及一种铈 - 锆基复合氧化物，其可用于例如从内燃机和锅炉等内燃机排放的废气的净化，并可在低温区域释放高水平的氧气， 其制造方法，使用其的氧气储存/释放组分，废气净化催化剂和废气净化方法。 铈锆系复合氧化物满足氧释放开始温度为380℃以下的要求（1），（2）氧释放量为485μmol/ g以上，进一步（3） 在400℃下的氧释放量不小于15μmol/ g。 铈 - 锆基复合氧化物可以通过例如将铈原料和锆原料以预定的混合比混合在一起，在起始原料混合物在熔点以上的温度下熔融， 然后冷却熔体以形成锭，然后任选地研磨锭以制备粉末，随后在加热下除去粉末晶粒内的应变，然后研磨至更细的状态。

公开(公告)号：US20070155624A1

公开(公告)日：2007-07-05

申请号：US11717162

申请日：2007-03-13

申请人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

发明人： Takahiro Wakita ,  Akira Kohara ,  Yasuharu Kanno ,  Hiroaki Omoto

IPC分类号： B01J23/10

CPC分类号： C01G25/00 ,  B01D53/945 ,  B01D2255/407 ,  B01D2255/908 ,  B01J23/10 ,  B01J23/63 ,  B01J35/002 ,  B01J35/023 ,  B01J37/0036 ,  B01J37/0081 ,  B01J37/04 ,  C01P2002/72 ,  C01P2004/61 ,  C01P2004/62 ,  Y02T10/22

摘要： This invention relates to a cerium-zirconium-base composite oxide, which is useful, e.g., for the purification of exhaust gas discharged from combustion engines such as internal combustion engines and boilers and can release a high level of oxygen in a low temperature region, a method for producing the same, an oxygen storage/release component using the same, an exhaust gas purification catalyst, and an exhaust gas purification method. The cerium-zirconium-base composite oxide satisfies requirements (1) that the oxygen release initiation temperature is 380° C. or below, (2) that the oxygen release amount is not less than 485 μmol/g, and further (3) that the oxygen release amount at 400° C. is not less than 15 μmol/g. The cerium-zirconium-base composite oxide can be produced, for example, by mixing a starting material for cerium and a starting material for zirconium at a predetermined mixing ratio together, melting the starting material mixture at a temperature at or above the melting point, then cooling the melt to form an ingot, then optionally grinding the ingot to prepare powder, subsequently removing strain within powder crystal grains under heating, and then grinding to a further fine state.

摘要翻译： 本发明涉及一种铈 - 锆基复合氧化物，其可用于例如从内燃机和锅炉等内燃机排放的废气的净化，并可在低温区域释放高水平的氧气， 其制造方法，使用其的氧气储存/释放组分，废气净化催化剂和废气净化方法。 铈锆系复合氧化物满足氧释放开始温度为380℃以下的要求（1），（2）氧释放量为485mumol / g以上，进一步（3） 在400℃下的氧释放量不小于15mumol / g。 铈 - 锆基复合氧化物可以通过例如将铈原料和锆原料以预定的混合比混合在一起，在起始原料混合物在熔点以上的温度下熔融， 然后冷却熔体以形成锭，然后任选地研磨锭以制备粉末，随后在加热下除去粉末晶粒内的应变，然后研磨至更细的状态。

公开(公告)号：US5609839A

公开(公告)日：1997-03-11

申请号：US463889

申请日：1995-06-05

申请人： Takashi Itoh ,  Yukio Kosaki ,  Takeshi Chonan ,  Takashi Matsuda ,  Yasuharu Kanno ,  Masao Wakabayashi ,  Makoto Nakamura

发明人： Takashi Itoh ,  Yukio Kosaki ,  Takeshi Chonan ,  Takashi Matsuda ,  Yasuharu Kanno ,  Masao Wakabayashi ,  Makoto Nakamura

IPC分类号： B01D53/94 ,  B01J23/50 ,  B01J35/10 ,  B01J8/02

CPC分类号： B01D53/9418 ,  B01J23/50 ,  B01J35/0026 ,  B01J35/1019 ,  B01D2251/208 ,  B01D2255/104 ,  B01D2258/012 ,  Y02T10/24

摘要： A NO.sub.x removal catalyst resistant to high temperatures, comprising an activated alumina wherein the specific surface area measured by the nitrogen adsorption method is 120 m.sup.2 /g or more, the bulk density measured by the mercury porosimetry is 0.60 g/cm.sup.3 or more, and the skeleton density measured by the mercury porosimetry is 1.80 g/cm.sup.3 or less and silver carried on said activated alumina. Then said catalyst or a structure having said catalyst coated on a substrate is brought in contact with exhaust gas from an internal combustion engine that is operated at a lean fuel/air ratio, such as a lean-burn engine, NO.sub.x can be removed efficiently within a quite short contact time.

摘要翻译： 耐高温的NOx去除催化剂，其包含活性氧化铝，其中通过氮吸附法测得的比表面积为120m 2 / g以上，通过水银孔率法测定的体积密度为0.60g / cm 3以上， 通过水银孔率法测定的骨架密度为1.80g / cm 3以下，在所述活性氧化铝上承载银。 然后，所述催化剂或具有涂覆在基板上的所述催化剂的结构与来自以稀燃燃料发动机的贫燃料/空气比操作的内燃机的废气接触，可以有效地将NOx除去 相当短的接触时间。

公开(公告)号：US5559072A

公开(公告)日：1996-09-24

申请号：US358373

申请日：1994-12-19

申请人： Takashi Itoh ,  Yukio Kosaki ,  Takeshi Chonan ,  Takashi Matsuda ,  Yasuharu Kanno ,  Masao Wakabayashi ,  Makoto Nakamura

发明人： Takashi Itoh ,  Yukio Kosaki ,  Takeshi Chonan ,  Takashi Matsuda ,  Yasuharu Kanno ,  Masao Wakabayashi ,  Makoto Nakamura

IPC分类号： B01D53/94 ,  B01J23/50 ,  B01J35/10 ,  B01J23/48

CPC分类号： B01D53/9418 ,  B01J23/50 ,  B01J35/0026 ,  B01J35/1019 ,  B01D2251/208 ,  B01D2255/104 ,  B01D2258/012 ,  Y02T10/24

摘要： A NO.sub.x removal catalyst resistant to high temperatures, comprising an activated alumina wherein the specific surface area measured by the nitrogen adsorption method is 120 m.sup.2 /g or more, the bulk density measured by the mercury porosimetry is 0.60 g/cm.sup.3 or more, and the skeleton density measured by the mercury porosimetry is 1.80 g/cm.sup.3 or less and silver carried on said activated alumina. When said catalyst or a structure having said catalyst coated on a substrate is brought in contact with exhaust gas from an internal combustion engine that is operated at a lean fuel/air ratio, such as a lean-burn engine, NO.sub.x can be removed efficiently within a quite short contact time.

摘要翻译： 耐高温的NOx去除催化剂，其包含活性氧化铝，其中通过氮吸附法测得的比表面积为120m 2 / g以上，通过水银孔率法测定的体积密度为0.60g / cm 3以上， 通过水银孔率法测定的骨架密度为1.80g / cm 3以下，在所述活性氧化铝上承载银。 当所述催化剂或具有涂覆在基板上的所述催化剂的结构与来自稀燃燃料发动机的贫燃料/空气比的内燃机的废气接触时，可以有效地将NOx除去 相当短的接触时间。

公开(公告)号：US20130236381A1

公开(公告)日：2013-09-12

申请号：US13885256

申请日：2011-10-13

申请人： Takehiro Fujimura ,  Yasuharu Kanno

发明人： Takehiro Fujimura ,  Yasuharu Kanno

IPC分类号： B01J23/63 ,  B01D53/94 ,  B01D53/56

CPC分类号： B01J23/63 ,  B01D53/565 ,  B01D53/9413 ,  B01D2255/1025 ,  B01D2255/2061 ,  B01D2255/2063 ,  B01D2255/2065 ,  B01D2255/2066 ,  B01D2255/2068 ,  B01D2255/20715 ,  B01D2255/20738 ,  B01D2255/407 ,  B01D2255/90 ,  B01D2255/9202 ,  B01D2258/012 ,  B01D2258/0283 ,  B01J23/002 ,  B01J23/10 ,  B01J35/002 ,  B01J35/006 ,  B01J35/023 ,  B01J35/04 ,  B01J35/1061 ,  B01J35/1066 ,  B01J37/0036 ,  B01J37/0201 ,  B01J2523/00 ,  F01N3/0864 ,  F01N3/2803 ,  F01N2570/14 ,  Y02A50/2344 ,  B01J2523/3706 ,  B01J2523/3725 ,  B01J2523/48

摘要： A denitration catalyst composition to efficiently and reductively remove nitrogen oxides from exhaust gas of a boiler or an internal combustion engine operated in lean-combustion, such as a gasoline engine, a diesel engine, by carbon monoxide and hydrocarbons; and a denitration method using the catalyst composition. In the denitration catalyst composition, a precious metal element having Rh as an essential component is supported on a zirconium oxide-based carrier formed by condensing or mixing primary particles having a zirconium oxide as a main component, and further a cerium-containing oxide (B) is present at the surface of the zirconium oxide-based carrier and at the gap of the secondary particles; and a denitration method characterized in that exhaust gas containing NO, CO and O2 is contacted with the denitration catalyst composition, under oxidative atmosphere having an air/fuel ratio of 14.7 or higher, at a temperature of 400 to 800° C.

摘要翻译： 1.一种脱硝催化剂组合物，用于通过一氧化碳和碳氢化合物在诸如汽油发动机，柴油发动机之类的贫燃燃烧的锅炉或内燃机的废气中有效还原地除去氮氧化物; 和使用催化剂组合物的脱硝方法。 在脱硝催化剂组合物中，以Rh为必须成分的贵金属元素负载在通过将具有氧化锆作为主要成分的一次粒子冷凝或混合而形成的氧化锆系载体上，还含有含铈氧化物 ）存在于氧化锆基载体的表面和二次粒子的间隙处; 以及脱气方法，其特征在于，在空气/燃料比为14.7以上的氧化气氛下，在400〜800℃的温度下，含有NO，CO和O 2的废气与脱硝催化剂组合物接触。

公开(公告)号：US20070158343A1

公开(公告)日：2007-07-12

申请号：US10587849

申请日：2005-02-08

申请人： Toshiaki Shimada ,  Yasuki Yoshida ,  Hirokazu Kuwabara ,  Yasuhiro Osame ,  Yasuharu Kanno ,  Yasuji Kawamata ,  Hideyo Yamasaki

发明人： Toshiaki Shimada ,  Yasuki Yoshida ,  Hirokazu Kuwabara ,  Yasuhiro Osame ,  Yasuharu Kanno ,  Yasuji Kawamata ,  Hideyo Yamasaki

IPC分类号： B65D6/00 ,  B60L8/00

CPC分类号： F17C1/06 ,  F17C1/08 ,  F17C1/14 ,  F17C1/16 ,  F17C2201/0109 ,  F17C2201/0119 ,  F17C2201/0166 ,  F17C2201/056 ,  F17C2203/013 ,  F17C2203/0604 ,  F17C2203/0619 ,  F17C2203/0646 ,  F17C2203/0648 ,  F17C2203/0665 ,  F17C2203/0668 ,  F17C2203/067 ,  F17C2205/0323 ,  F17C2205/0397 ,  F17C2209/222 ,  F17C2209/232 ,  F17C2209/234 ,  F17C2221/011 ,  F17C2221/012 ,  F17C2221/033 ,  F17C2223/0123 ,  F17C2223/035 ,  F17C2260/011 ,  F17C2260/012 ,  F17C2260/013 ,  F17C2265/07 ,  F17C2270/0168 ,  F17C2270/0184 ,  F17C2270/0194 ,  F17C2270/02 ,  F17C2270/05 ,  F17C2270/07 ,  F17C2270/0763 ,  Y02E60/321

摘要： A pressure vessel liner includes a tubular trunk, and head plates for closing opposite end openings of the trunk. Provided inside the trunk is a reinforcing member integral with the trunk and extending longitudinally of the trunk for dividing the interior of the trunk into a plurality of spaces. The two head plates are joined respectively to opposite ends of the reinforcing member. The pressure vessel liner has an enhanced pressure resistant strength against longitudinal forces.

摘要翻译： 压力容器衬套包括管状躯干和用于封闭躯干的相对端部开口的头板。 在躯干内部设置有与躯干一体并且用于将躯干的内部分成多个空间的躯干纵向延伸的加强构件。 两个头板分别连接到加强件的相对端。 压力容器衬里对纵向力具有增强的耐压强度。

公开(公告)号：US20060261073A1

公开(公告)日：2006-11-23

申请号：US10566712

申请日：2004-08-06

申请人： Yasuharu Kanno

发明人： Yasuharu Kanno

IPC分类号： F17C1/00

CPC分类号： F17C1/06 ,  F17C1/08 ,  F17C1/14 ,  F17C1/16 ,  F17C2201/0109 ,  F17C2203/013 ,  F17C2203/0604 ,  F17C2203/0607 ,  F17C2203/0617 ,  F17C2203/0619 ,  F17C2203/0646 ,  F17C2203/0648 ,  F17C2203/0668 ,  F17C2203/067 ,  F17C2209/21 ,  F17C2209/2154 ,  F17C2209/22 ,  F17C2209/221 ,  F17C2209/222 ,  F17C2209/224 ,  F17C2209/227 ,  F17C2209/228 ,  F17C2209/232 ,  F17C2209/234 ,  F17C2221/011 ,  F17C2221/012 ,  F17C2221/033 ,  F17C2223/0123 ,  F17C2223/035 ,  F17C2223/036 ,  F17C2260/011 ,  F17C2260/012 ,  F17C2270/01 ,  F17C2270/0168 ,  F17C2270/0178 ,  F17C2270/0184 ,  F17C2270/0186 ,  F17C2270/02 ,  F17C2270/05 ,  F17C2270/07 ,  F17C2270/0763 ,  Y02E60/321

摘要： A pressure vessel liner includes a tubular trunk and head plates for closing opposite end openings of the trunk. The pressure vessel liner includes a first liner component providing the trunk, and two second liner components joined respectively to opposite ends of the first liner component and providing the two head plates. The first and second liner components have reinforcing walls provided inside peripheral walls, respectively, and correspond to one another in the position of the reinforcing walls. Each adjacent pair of liner components have their reinforcing walls joined in corresponding relation. The liner has an increased pressure resistant strength against longitudinal forces.

摘要翻译： 压力容器衬里包括用于封闭躯干的相对端部开口的管状躯干和头板。 压力容器衬里包括提供躯干的第一衬垫部件和分别连接到第一衬里部件的相对端并提供两个头板的两个第二衬垫部件。 第一和第二衬里部件分别具有设置在周壁内部的加强壁，并且在加强壁的位置处彼此对应。 每个相邻的一对衬垫部件具有以相应关系连接的加强壁。 衬里对纵向力具有增加的耐压强度。

公开(公告)号：US08796171B2

公开(公告)日：2014-08-05

申请号：US13885256

申请日：2011-10-13

申请人： Takehiro Fujimura ,  Yasuharu Kanno

发明人： Takehiro Fujimura ,  Yasuharu Kanno

IPC分类号： B01J21/00 ,  B01J23/00 ,  B01J23/02 ,  B01J23/10 ,  B01J23/40 ,  B01J23/42 ,  B01J23/63 ,  B01D53/94 ,  B01J35/02 ,  B01D53/56 ,  B01J35/10 ,  B01J35/00 ,  F01N3/28 ,  F01N3/08

CPC分类号： B01J23/63 ,  B01D53/565 ,  B01D53/9413 ,  B01D2255/1025 ,  B01D2255/2061 ,  B01D2255/2063 ,  B01D2255/2065 ,  B01D2255/2066 ,  B01D2255/2068 ,  B01D2255/20715 ,  B01D2255/20738 ,  B01D2255/407 ,  B01D2255/90 ,  B01D2255/9202 ,  B01D2258/012 ,  B01D2258/0283 ,  B01J23/002 ,  B01J23/10 ,  B01J35/002 ,  B01J35/006 ,  B01J35/023 ,  B01J35/04 ,  B01J35/1061 ,  B01J35/1066 ,  B01J37/0036 ,  B01J37/0201 ,  B01J2523/00 ,  F01N3/0864 ,  F01N3/2803 ,  F01N2570/14 ,  Y02A50/2344 ,  B01J2523/3706 ,  B01J2523/3725 ,  B01J2523/48

摘要： A denitration catalyst composition to efficiently and reductively remove nitrogen oxides from exhaust gas of a boiler or an internal combustion engine operated in lean-combustion, such as a gasoline engine, a diesel engine, by carbon monoxide and hydrocarbons; and a denitration method using the catalyst composition. In the denitration catalyst composition, a precious metal element having Rh as an essential component is supported on a zirconium oxide-based carrier formed by condensing or mixing primary particles having a zirconium oxide as a main component, and further a cerium-containing oxide (B) is present at the surface of the zirconium oxide-based carrier and at the gap of the secondary particles; and a denitration method characterized in that exhaust gas containing NO, CO and O2 is contacted with the denitration catalyst composition, under oxidative atmosphere having an air/fuel ratio of 14.7 or higher, at a temperature of 400 to 800° C.

摘要翻译： 1.一种脱硝催化剂组合物，用于通过一氧化碳和碳氢化合物在诸如汽油发动机，柴油发动机之类的贫燃燃烧的锅炉或内燃机的废气中有效还原地除去氮氧化物; 和使用催化剂组合物的脱硝方法。 在脱硝催化剂组合物中，以Rh为必须成分的贵金属元素负载在通过将具有氧化锆作为主要成分的一次粒子冷凝或混合而形成的氧化锆系载体上，还含有含铈氧化物 ）存在于氧化锆基载体的表面和二次粒子的间隙处; 以及脱气方法，其特征在于，在空气/燃料比为14.7以上的氧化气氛下，在400〜800℃的温度下，含有NO，CO和O 2的废气与脱硝催化剂组合物接触。