WO2013153915A1 - 排気ガス浄化用触媒 - Google Patents

排気ガス浄化用触媒 Download PDF

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WO2013153915A1
WO2013153915A1 PCT/JP2013/057475 JP2013057475W WO2013153915A1 WO 2013153915 A1 WO2013153915 A1 WO 2013153915A1 JP 2013057475 W JP2013057475 W JP 2013057475W WO 2013153915 A1 WO2013153915 A1 WO 2013153915A1
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exhaust gas
compound
catalyst
examples
site
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PCT/JP2013/057475
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English (en)
French (fr)
Japanese (ja)
Inventor
啓充 高木
高橋　進
彦睦 渡邉
晶子 杉岡
晃 阿部
孝裕 古川
啓太 石崎
直樹 大矢
貴弘 中
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三井金属鉱業株式会社
本田技研工業株式会社
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Priority to CN201380019292.7A priority Critical patent/CN104203402B/zh
Priority to DE201311002020 priority patent/DE112013002020T5/de
Priority to IN2259MUN2014 priority patent/IN2014MN02259A/en
Publication of WO2013153915A1 publication Critical patent/WO2013153915A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/32—Manganese, technetium or rhenium
    • B01J23/34—Manganese
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
    • B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/656—Manganese, technetium or rhenium
    • B01J23/6562—Manganese
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/66—Silver or gold
    • B01J23/68—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/688—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with manganese, technetium or rhenium
    • 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
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/70—Catalysts, in general, characterised by their form or physical properties characterised by their crystalline properties, e.g. semi-crystalline
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/03—Precipitation; Co-precipitation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/104—Silver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/206—Rare earth metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/206—Rare earth metals
    • B01D2255/2061—Yttrium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/206—Rare earth metals
    • B01D2255/2063—Lanthanum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/2073—Manganese
    • 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
    • B01J2235/00—Indexing scheme associated with group B01J35/00, related to the analysis techniques used to determine the catalysts form or properties
    • B01J2235/15—X-ray diffraction
    • 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
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0215—Coating
    • 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
    • F01N2510/065—Surface coverings for exhaust purification, e.g. catalytic reaction for reducing soot ignition temperature

Definitions

  • the present invention relates to an exhaust gas purifying catalyst used for purifying exhaust gas discharged from an internal combustion engine such as an automobile.
  • Exhaust gas discharged from internal combustion engines such as automobiles contains harmful components such as hydrocarbons, carbon monoxide, and nitrogen oxides.
  • the exhaust gas discharged from the diesel engine contains particulates (PM; particulate matter), and if these materials are released into the atmosphere as they are, they cause air pollution.
  • PM particulate matter
  • DPF diesel particulate filter
  • An object of the present invention is to provide a catalyst for purifying exhaust gas that is excellent in gas purification performance while combustion purifying particulates of exhaust gas discharged from an internal combustion engine such as an automobile.
  • the present inventors have found that from a crystal having a DyMn 2 O 5 structure in which the A site contains Y and the B site contains Mn.
  • the present inventors have found that a complex oxide having a B / A site composition ratio B / A larger than 2 is excellent in gas purification performance as well as combustion purification of particulates.
  • the exhaust gas purifying catalyst of the present invention comprises a crystal having a DyMn 2 O 5 structure in which the A site contains Y and the B site contains Mn, and the composition ratio B / A> 2 of the B site and the A site. It is characterized by including a double oxide.
  • a double oxide consisting of a crystal having a DyMn 2 O 5 structure and having a composition ratio B / A> 2 of the B site and the A site is B / A which is a stoichiometric ratio among the elements of the B site.
  • Excess B-site element that is a portion exceeding 2 means that at least a part is in solid solution in the crystal.
  • crystallization is interpreted as containing in the crystal
  • the exhaust gas purifying catalyst of the present invention preferably contains Ag, and at least a part of Ag is preferably dissolved in the double oxide crystal.
  • the catalyst layer supported on the catalyst support contains the double oxide, and Ag is supported on the catalyst layer.
  • the catalyst layer supported on the catalyst support contains the double oxide, and at least one element selected from Pt, Au, Pd and Rh is supported on the catalyst layer.
  • the exhaust gas purifying catalyst of the present invention is effective for purifying exhaust gas exhausted from an internal combustion engine such as an automobile because the exhaust gas purifying catalyst of the present invention combusts and purifies particulates and is excellent in gas purification performance.
  • FIG. 3 is a chart showing XRDs of exhaust gas purifying catalysts of Examples 1 to 4, 7 and Comparative Example 1.
  • FIG. 7 is a chart showing XRDs of exhaust gas purifying catalysts of Examples 8 to 11 and Comparative Example 1.
  • 6 is a chart showing XRD of exhaust gas purifying catalysts of Examples 12 to 16 and Example 4.
  • FIG. 7 is a chart showing XRD of exhaust gas purifying catalysts of Comparative Examples 1 to 6.
  • the exhaust gas purifying catalyst of the present invention will be described below.
  • the exhaust gas purifying catalyst of the present invention is composed of a crystal having a DyMn 2 O 5 structure in which the A site contains Y and the B site contains Mn, and the composition ratio B / A> 2 of the B site and the A site.
  • the double oxide composed of a crystal having a DyMn 2 O 5 structure is a dysprosium manganate structure whose XRD pattern is included in the space group Pbam (see DyMn 2 O 5 structure, ICSD (Inorganic crystal structure database)) It is identified as a crystal that takes Furthermore, mixed oxide of crystalline taking DyMn 2 O 5 structure is shown as a general formula AB 2 O 5.
  • the A site contains Y
  • the B site contains Mn
  • the B site and the A site have a composition ratio B / A> 2
  • the B site is excessive from the stoichiometric ratio
  • at least a part of the excess B-site element is dissolved in the crystal.
  • the element in which the excess B-site element is dissolved in the crystal means that the B-site element is excessively shifted from the stoichiometric ratio, but in the XRD pattern, the DyMn 2 O 5 structure And the BRD element having an ionic radius smaller than that of the A-site element is dissolved in a solid solution, so that a shift is observed in 2 ⁇ of the XRD peak.
  • the peak can not be attributed to and DyMn 2 O 5 include elements of B site is observed, as long observed deviation of 2 ⁇ of XRD peak attributed to DyMn 2 O 5, of excess B-site It is considered that at least a part of the element is dissolved in the crystal lattice.
  • the exhaust gas purifying catalyst of the present invention may coexist with an oxide of an element constituting the B site, for example, manganese oxide, together with the double oxide in which the B site is excessive.
  • an oxide of an element constituting the B site for example, manganese oxide
  • the exhaust gas purifying catalyst of the present invention may contain Ag.
  • Containing Ag means that Ag coexists with the double oxide, but at least a part of Ag may be dissolved in the crystal of the double oxide.
  • Such a double oxide of the present invention can be produced, for example, as follows.
  • An example of the production method will be described taking production of a complex oxide in which the A site is Y and the B site is Mn.
  • a precipitant is added to a solution containing Y and Mn to obtain a precipitate containing Y and Mn at an atomic ratio Mn / Y> 2, and this is dried and fired.
  • a method of obtaining a double oxide YMO can be mentioned.
  • YMn 2 O 5 those having a composition deviating from the stoichiometric ratio are also collectively referred to as YMO.
  • the production of the double oxide may be carried out by carrying out the Mn / Y ratio in a stoichiometric ratio, and thereafter, the excess Mn may be supported.
  • the support of Ag may be carried out by a method such as evaporation to dryness using silver nitrate or the like, or dry mixing using metal Ag.
  • Y compound used in each of the above production methods is a group consisting of La compound, Sr compound, Ce compound, Ba compound, Ca compound, Sc compound, Ho compound, Er compound, Tm compound, Yb compound, Lu compound and Bi compound.
  • the compound (Y 1-x A x ) Mn 2 + y O 5 (wherein A is La) is obtained by carrying out the above production method by replacing the Y atom of the Y compound with one or more compounds selected from , Sr, Ce, Ba, Ca, Sc, Ho, Er, Tm, Yb, Lu, or Bi, and 1>x> 0, y> 0).
  • the Mn compound used in each of the above production methods is a compound selected from the group consisting of Co compound, Fe compound, Ni compound, Cr compound, Mg compound, Ti compound, Nb compound, Ta compound, Ru compound and Cu compound.
  • the Y compound used in the above production method is composed of La compound, Sr compound, Ce compound, Ba compound, Ca compound, Sc compound, Ho compound, Er compound, Tm compound, Yb compound, Lu compound and Bi compound.
  • the Y atom of the Y compound is replaced with one or more compounds selected from the group, and the Mn compound is replaced with a Co compound, Fe compound, Ni compound, Cr compound, Mg compound, Ti compound, Nb compound, Ta compound, Ru compound.
  • La, Sr, Ce, Ba, Ca, Sc, Ho, Er, Tm, Yb, Lu, or Bi listed as atoms replacing Y at the A site have an ionic radius that can replace Y.
  • La, Ce, Ca, Sc, Ho, Er, Tm, Yb, Lu, or Bi having an ionic radius within ⁇ 10% with respect to the ionic radius of Y can be stably substituted. .
  • Co, Fe, Ni, Cr, Mg, Ti, Nb, Ta, Cu or Ru listed as atoms replacing Mn at the B site have an ionic radius that can replace Mn.
  • Co, Fe, Ni, Cr, Mg, Ti or Cu having an ionic radius within ⁇ 10% with respect to the ionic radius of Mn is particularly preferable because it can be stably replaced.
  • the double oxide of the present invention is preferably used as a catalyst layer supported on a catalyst support.
  • the catalyst support is made of, for example, ceramics or a metal material.
  • the shape of the catalyst support is not particularly limited, but is generally a honeycomb shape, a plate, a pellet, a DPF or the like, and preferably a honeycomb or a DPF.
  • the material for such a catalyst support include alumina (Al 2 O 3 ), mullite (3Al 2 O 3 -2SiO 2 ), cordierite (2MgO-2Al 2 O 3 -5SiO 2 ), and titanic acid.
  • Ceramics such as aluminum (Al 2 TiO 5 ) and silicon carbide (SiC), and metal materials such as stainless steel.
  • the combustion purification performance and gas purification performance of the particulates are further improved.
  • the amount of the supported metal element is 0.01 to 20%, preferably 0.1 to 10%, based on the total mass of the metal element and the support, the exhaust gas purification performance is improved.
  • a catalyst layer carrying at least one element selected from the group consisting of Ag, Pt, Au, Pd, Rh, Cu and Mn can be provided on the surface of the catalyst support. That is, a catalyst support made of a ceramic or metal material, a double oxide supported on the catalyst support, and Ag, Pt, Au, Pd, Rh, Cu and Mn supported on the double oxide
  • An exhaust gas purifying catalyst excellent in combustion purification performance and gas purification performance of particulates having a structure having at least one element selected from the group consisting of
  • the solution whose concentration was adjusted in step 1 was used as a raw material solution.
  • Ion exchange water was added to an aqueous solution obtained by mixing 26.59 mL of 2.5% NH 3 aqueous solution and 11.33 mL of 30% hydrogen peroxide water to prepare 265.9 mL as a precipitant. Thereafter, a precipitant was added dropwise to the raw material liquid to form a precipitate. The obtained precipitate was filtered, washed, and then heated to obtain a powder.
  • Examples 8-11 An yttrium nitrate solution and a manganese nitrate solution with known metal concentrations are prepared and mixed so that Y and Mn are in a proportion of excess Mn as shown in Table 1, and the final YMO obtained is 50 g / A solution whose concentration was adjusted with ion-exchanged water so as to be L was used as a raw material liquid. On the other hand, ion-exchanged water was added to an aqueous solution in which 26.59 mL of 2.5% NH 3 aqueous solution and 11.33 mL of 30% hydrogen peroxide solution were mixed to prepare 265.9 mL, which was used as a precipitant.
  • FIG. 1 shows XRD patterns after the exhaust gas purifying catalysts of Examples 1 to 4, 7 and Comparative Example 1 were subjected to a durability treatment at 700 ° C. for 30 hours in the atmosphere.
  • Table 1 also shows the ratio of the Ag (220) plane peak intensity and the YMO (211) plane peak intensity of each of Examples 1 to 11 and Comparative Example 1.
  • the peak attributed to Ag is smaller than the peak of Comparative Example 1 having the same amount of Ag. From this, at least a part of Ag is dissolved in the crystal. It is judged that
  • FIG. 2 shows XRD patterns after the exhaust gas purifying catalysts of Examples 8 to 11 and Comparative Example 1 were subjected to an endurance treatment at 700 ° C. for 30 hours in the atmosphere.
  • Table 1 also shows the ratio of the Ag (220) plane peak intensity and the YMO (211) plane peak intensity of each Example and Comparative Example.
  • the exhaust gas purifying catalysts of Examples 8 to 11 were identified as Y / Mn> 2, but a double oxide having a DyMn 2 O 5 structure.
  • the peak attributed to Ag is smaller than the peak of Comparative Example 1 having the same amount of Ag. From this, at least a part of Ag is a crystal of a double oxide. It is determined that
  • Examples 12-20 Using an yttrium nitrate solution, a manganese nitrate solution, and a lanthanum nitrate solution, Y and La have the ratio shown in column a of Table 2, and (Y + La) and Mn have the ratio shown in column b of Table 2.
  • Exhaust gas purifying catalysts of Examples 12 to 20 made of a double oxide of (Y 1-x La x ) Mn 2 + y O 5 were obtained in the same manner as Example 1 except that each was mixed. The amount of Ag supported on the obtained exhaust gas purification catalyst was 5.57% by mass based on the total mass of metal Ag + carrier.
  • Comparative Example 2 comprising a double oxide of (Y 1-x La x ) Mn 2 O 5 was carried out in the same manner as in Examples 12 to 16, except that excess Mn was not added.
  • 6 to 6 exhaust gas purification catalysts were obtained. The amount of Ag supported on the obtained exhaust gas purification catalyst was 5.57% by mass based on the total mass of metal Ag + carrier.
  • FIG. 3 shows XRD patterns after endurance treatment of the exhaust gas purifying catalysts of Examples 12 to 16 and Example 4 in the atmosphere at 700 ° C. for 30 hours.
  • FIG. 4 shows XRD patterns measured in the same manner for the exhaust gas purifying catalysts of Comparative Examples 1 to 6.
  • the peak attributed to Ag is the same Ag loading, and is smaller than the peaks of Comparative Examples 2 to 6 having the same La substitution amount. It is judged that at least a part of Ag is dissolved in the crystal.
  • ⁇ Fixed bed simulation gas purification performance evaluation test 1> The exhaust gas purifying catalysts of Examples 1 to 20 and Comparative Examples 1, 5, and 6 were subjected to the endurance treatment at 700 ° C. for 30 hours in the atmosphere, and the catalytic activity of the exhaust gas purifying catalyst was as follows. evaluated.
  • Tables 1 and 2 also show specific surface areas (measured by the BET method) after endurance treatment at 700 ° C. for 30 hours.
  • the exhaust gas purifying catalysts of Examples 1 to 11 in which Mn was excessive had improved catalytic activity as compared with Comparative Example 1. Further, the catalyst activity improves as the excess amount increases until Mn exceeds 50 at%. However, in Examples 5, 6, and 7 in which 60 at%, 80 at%, and 85 at% excess, the catalyst activity is lower than that in Example 4.
  • the excess amount of Mn was found to be 2 to 85 at%, preferably 5 to 50 at%.
  • Examples 21 and 22 Exhaust gas purifying catalysts of Examples 21 and 22 were obtained in the same manner as in Example 4 except that the amount of Ag supported was 0% by mass and 2% by mass based on the total mass of Ag + carrier.
  • ⁇ Fixed bed simulation gas purification performance evaluation test 2> The exhaust gas purification catalysts of Examples 21 and 22 were subjected to an endurance treatment at 700 ° C. for 30 hours in the atmosphere, and then the catalytic activity of the exhaust gas purification catalyst was evaluated by a fixed bed simulated gas purification performance evaluation test. The results are shown in Table 4. From this result, it was found that the exhaust gas purification performance is improved by the support of Ag. It has also been found that the supported amount of Ag is 1 to 20% by mass, preferably 1 to 10% by mass, based on the total mass of Ag + carrier.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
PCT/JP2013/057475 2012-04-10 2013-03-15 排気ガス浄化用触媒 WO2013153915A1 (ja)

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CN201380019292.7A CN104203402B (zh) 2012-04-10 2013-03-15 废气净化用催化剂
DE201311002020 DE112013002020T5 (de) 2012-04-10 2013-03-15 Katalysator für Abgasreinigung
IN2259MUN2014 IN2014MN02259A (enrdf_load_stackoverflow) 2012-04-10 2013-03-15

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WO2015159403A1 (ja) 2014-04-17 2015-10-22 三井金属鉱業株式会社 排気ガス浄化用触媒組成物及び排気ガス浄化触媒
US20170095794A1 (en) * 2015-10-01 2017-04-06 Clean Diesel Technologies, Inc. NO Oxidation Activity of Pseudo-brookite Compositions as Zero-PGM Catalysts for Diesel Oxidation Applications
WO2019097878A1 (ja) 2017-11-17 2019-05-23 三井金属鉱業株式会社 排ガス浄化用組成物
CN110433794B (zh) * 2019-08-15 2020-10-30 南开大学 通式AM2O5-x化合物作为催化VOC燃烧的催化剂的应用
CN115739073B (zh) * 2022-11-28 2024-07-26 深圳市蓝美蓝科技有限公司 一种催化剂及其制备方法与用途

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