JP7358157B2 - 複合酸化物触媒、多孔質複合体および複合酸化物触媒の製造方法 - Google Patents
複合酸化物触媒、多孔質複合体および複合酸化物触媒の製造方法 Download PDFInfo
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- JP7358157B2 JP7358157B2 JP2019176556A JP2019176556A JP7358157B2 JP 7358157 B2 JP7358157 B2 JP 7358157B2 JP 2019176556 A JP2019176556 A JP 2019176556A JP 2019176556 A JP2019176556 A JP 2019176556A JP 7358157 B2 JP7358157 B2 JP 7358157B2
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- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Filtering Materials (AREA)
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
Description
2 基材
3 捕集層
22 隔壁
23 セル
S21~S23 ステップ
Claims (6)
- 排ガス中の粒子状物質の燃焼を促進させる複合酸化物触媒であって、
含有金属として、第1金属であるセリウムと、第2金属であるランタンと、第3金属と、を含み、
前記第3金属は、マンガンまたはプラセオジムであり、
前記含有金属におけるセリウムの含有率は10mol%以上かつ93mol%以下であり、
前記含有金属におけるランタンの含有率は3.5mol%以上かつ45mol%以下であり、
前記第3金属がマンガンである場合、前記含有金属における前記第3金属の含有率は3.5mol%以上かつ45mol%以下であり、
前記第3金属がプラセオジムである場合、前記含有金属における前記第3金属の含有率は10mol%であり、
前記含有金属におけるランタンの含有率は、前記含有金属における前記第3金属の含有率と等しく、
前記含有金属におけるセリウム、ランタンおよび前記第3金属以外の金属の含有率は1mol%以下であり、
倍率5000倍のSEM画像において内部に空洞を有する粒子を含み、
前記空洞の径は、0.2μm以上かつ5μm以下であることを特徴とする複合酸化物触媒。 - 請求項1に記載の複合酸化物触媒であって、
前記含有金属におけるセリウムの含有率は80mol%以上かつ93mol%以下であり、
前記含有金属におけるランタンの含有率は3.5mol%以上かつ10mol%以下であり、
前記第3金属がマンガンである場合、前記含有金属における前記第3金属の含有率は3.5mol%以上かつ10mol%以下であることを特徴とする複合酸化物触媒。 - 多孔質複合体であって、
多孔質の基材と、
前記基材上に形成され、排ガス中の粒子状物質を捕集する多孔質の捕集層と、
を備え、
前記捕集層は請求項1または2に記載の複合酸化物触媒を含むことを特徴とする多孔質複合体。 - 請求項3に記載の多孔質複合体であって、
前記基材は、内部が隔壁により複数のセルに仕切られたハニカム構造を有し、
前記複数のセルのうち少なくとも一部のセルの内側面は、前記捕集層により被覆されることを特徴とする多孔質複合体。 - 請求項4に記載の多孔質複合体であって、
ガソリンエンジンまたディーゼルエンジンから排出される排ガス中の粒子状物質を捕集するフィルタであることを特徴とする多孔質複合体。 - 排ガス中の粒子状物質の燃焼を促進させる複合酸化物触媒の製造方法であって、
原料金属の硝化物とクエン酸とを混合して混合水溶液を調製する工程と、
前記混合水溶液を加熱して前駆体を得る工程と、
前記前駆体を焼成して複合酸化物触媒を得る工程と、
を備え、
前記原料金属は、第1金属であるセリウムと、第2金属であるランタンと、第3金属と、を含み、
前記第3金属は、マンガンまたはプラセオジムであり、
前記原料金属におけるセリウムの含有率は10mol%以上かつ93mol%以下であり、
前記原料金属におけるランタンの含有率は3.5mol%以上かつ45mol%以下であり、
前記第3金属がマンガンである場合、前記原料金属における前記第3金属の含有率は3.5mol%以上かつ45mol%以下であり、
前記第3金属がプラセオジムである場合、前記原料金属における前記第3金属の含有率は10mol%であり、
前記原料金属におけるランタンの含有率は、前記原料金属における前記第3金属の含有率と等しく、
前記原料金属におけるセリウム、ランタンおよび前記第3金属以外の金属の含有率は1mol%以下であり、
前記複合酸化物触媒は、倍率5000倍のSEM画像において内部に空洞を有する粒子を含み、
前記空洞の径は、0.2μm以上かつ5μm以下であることを特徴とする複合酸化物触媒の製造方法。
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US17/022,441 US11904298B2 (en) | 2019-09-27 | 2020-09-16 | Composite oxide catalyst, porous composite, and method of producing composite oxide catalyst |
CN202010977202.7A CN112569923B (zh) | 2019-09-27 | 2020-09-17 | 复合氧化物催化剂、多孔质复合体以及复合氧化物催化剂的制造方法 |
DE102020212119.2A DE102020212119A1 (de) | 2019-09-27 | 2020-09-25 | Verbundoxidkatalysator, poröser verbundstoff und verfahren zur herstellung eines verbundoxidkatalysators |
DE102020216573.4A DE102020216573A1 (de) | 2019-09-27 | 2020-12-24 | Verbundoxidkatalysator, poröser verbundstoff und verfahren zur herstellung eines verbundoxidkatalysators |
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