JP2009078224A - Method for manufacturing catalyst for burning particulate matter - Google Patents
Method for manufacturing catalyst for burning particulate matter Download PDFInfo
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- JP2009078224A JP2009078224A JP2007249094A JP2007249094A JP2009078224A JP 2009078224 A JP2009078224 A JP 2009078224A JP 2007249094 A JP2007249094 A JP 2007249094A JP 2007249094 A JP2007249094 A JP 2007249094A JP 2009078224 A JP2009078224 A JP 2009078224A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 32
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000013618 particulate matter Substances 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title abstract description 6
- 239000002245 particle Substances 0.000 claims abstract description 41
- 239000010419 fine particle Substances 0.000 claims abstract description 12
- 239000007864 aqueous solution Substances 0.000 claims abstract description 11
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims abstract description 8
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- 238000002485 combustion reaction Methods 0.000 claims description 18
- 230000001376 precipitating effect Effects 0.000 claims 1
- 239000000243 solution Substances 0.000 abstract description 8
- 230000001678 irradiating effect Effects 0.000 abstract description 2
- 239000002244 precipitate Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 13
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000006185 dispersion Substances 0.000 description 6
- 229910001961 silver nitrate Inorganic materials 0.000 description 6
- 239000007787 solid Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000000746 purification Methods 0.000 description 3
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910001923 silver oxide Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
本発明は、ディーゼルエンジンからの排ガスなどに含まれる粒状物質、いわゆるパティキュレートマターを燃焼させるパティキュレートマター燃焼用触媒の製造方法に関する。 The present invention relates to a method for producing a particulate matter combustion catalyst for burning particulate matter contained in exhaust gas from a diesel engine, so-called particulate matter.
ディーゼルエンジンからの排ガスでは、当該排ガス中に含まれる粒状物質、いわゆるパティキュレートマター（以下、これをＰＭという）の存在が問題である。通常、排気中のＰＭはＤＰＦ（ディーゼルパティキュレートフィルターの略）により捕集されるが、この捕集による目詰まりのため、排ガスの圧力損失が高まり、出力および燃費の低下を引き起こす。 In exhaust gas from a diesel engine, the presence of particulate matter contained in the exhaust gas, so-called particulate matter (hereinafter referred to as PM) is a problem. Normally, PM in exhaust gas is collected by DPF (abbreviation of diesel particulate filter), but due to the clogging due to this collection, the pressure loss of exhaust gas increases, causing a decrease in output and fuel consumption.
このようにＰＭによるＤＰＦの目詰まりを防ぐためには、フィルター上でＰＭを燃焼除去しなければならない。この燃焼除去のためには一般に６００℃超といった比較的高い温度が必要であり、フィルターの電気的な加熱、もしくはエンジンの制御によって排気温度を高めてフィルターを加熱すること等が提案されている。 Thus, in order to prevent clogging of the DPF by PM, PM must be burned and removed on the filter. In general, a relatively high temperature of over 600 ° C. is necessary for this combustion removal, and it has been proposed to heat the filter by increasing the exhaust temperature by electrically heating the filter or controlling the engine.
これに関して特許文献１では、ハニカムフィルターの表面にＰＭを燃焼させる触媒を担持させ、ＰＭの捕集と同時に連続的に燃焼させる排ガス浄化触媒が開示されている。この特許文献１では、ＰＭを燃焼させる触媒として、アルカリ金属のケイ酸塩、アルミン酸塩、ジルコン酸塩等が開示されている。
In this regard,
また、特許文献２では、ＰＭフィルターと、活性酸素放出剤とからなる排ガス浄化装置が開示されている。ここで、この活性酸素放出剤は、周囲に過剰酸素があると酸素を取り込んで酸素を保持し、周囲の酸素濃度が低下すると活性酸素を放出する物質として示されており、具体例としては、アルカリ金属、アルカリ土類金属、希土類、遷移金属が挙げられている。
また、外部エネルギーを使用する方法として、特許文献３では、酸化性のガスを供給することで、銀粒子を活性の高い酸化銀へ変換するシステムが提案されている。
しかしながら、上記特許文献１、２のような触媒が提案されてはいるものの、ディーゼルエンジンの比較的低い排ガス温度（たとえば４００℃程度）での連続燃焼に対応した触媒は実現されていないのが現状である。
However, although catalysts such as those in
また、上記特許文献３のような外部エネルギーを使用する方法では、燃費の低下を招き、システムとしても大型になることから、車両へ搭載される触媒システムとしては、不向きである。
Further, the method using external energy as described in
上記のように、従来技術としてＰＭを連続燃焼させるための様々な排ガス浄化装置が提案されているが、外部エネルギーを使用しない方法で、ディーゼルエンジンの比較的低い排ガス温度での連続燃焼に対応できるシステムは確立していない。 As described above, various exhaust gas purification devices for continuously burning PM have been proposed as conventional techniques, but can be used for continuous combustion of diesel engines at a relatively low exhaust gas temperature by a method that does not use external energy. The system has not been established.
本発明は、上記問題に鑑みてなされたものであり、外部エネルギーを必要とせず、ディーゼルエンジンの比較的低い排気温度でも連続燃焼可能なＰＭ燃焼用触媒を提供することを目的とする。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a PM combustion catalyst that does not require external energy and can continuously burn even at a relatively low exhaust temperature of a diesel engine.
上記目的を達成するため、本発明は、Ｃｅ酸化物粒子を水溶液中に分散させ、この水溶液中に水溶性のＡｇ塩を溶解させた後、さらにジエタノールアミンを加えたうえで、超音波を照射することにより、Ｃｅ酸化物粒子の表面にＡｇ微粒子を還元して析出させることを特徴とする。 In order to achieve the above object, according to the present invention, Ce oxide particles are dispersed in an aqueous solution, a water-soluble Ag salt is dissolved in the aqueous solution, diethanolamine is further added, and ultrasonic waves are irradiated. Thus, Ag fine particles are reduced and deposited on the surface of the Ce oxide particles.
本発明は、後述する実施例に代表されるような試作検討を行った結果、実験的に見出されたものであり、本ＰＭ燃焼用触媒の製造方法によって、Ｃｅ酸化物粒子の表面にＡｇ微粒子を均一に担持してなる触媒が作製される。そして、この触媒によれば、低温で活性酸素を放出するため、外部エネルギーを必要とせず、ディーゼルエンジンの比較的低い排気温度でも連続燃焼可能なＰＭ燃焼用触媒が提供される。 The present invention has been experimentally found as a result of trial production as typified by Examples described later, and is produced on the surface of Ce oxide particles by the method for producing a catalyst for PM combustion. A catalyst is formed by uniformly supporting fine particles. According to this catalyst, since active oxygen is released at a low temperature, a PM combustion catalyst that does not require external energy and can continuously burn even at a relatively low exhaust temperature of a diesel engine is provided.
本発明の実施形態に係るＰＭ燃焼用触媒の製造方法では、まず、硝酸セリウム溶液中に沈殿剤としてジエタノールアミンを滴下することにより、Ｃｅ酸化物（たとえば、ＣｅＯ2）よりなる粒子を作製する。ここで、このＣｅ酸化物粒子のサイズは、ナノメートルオーダー（平均粒径が１００μｍ以下）であることが好ましいが、それ以上のサイズであってもよい。 In the method for producing a PM combustion catalyst according to an embodiment of the present invention, first, particles of Ce oxide (for example, CeO 2 ) are prepared by dropping diethanolamine as a precipitant into a cerium nitrate solution. Here, the size of the Ce oxide particles is preferably on the order of nanometers (average particle size is 100 μm or less), but may be larger than that.
次に、このＣｅ酸化物粒子を水に入れて超音波分散させる。そして、Ｃｅ酸化物粒子が分散してなる水溶液中に、硝酸銀などの水溶性のＡｇ塩を溶解させる。さらに、この水溶液に対して、還元剤としてのジエタノールアミンを加えた状態で超音波を照射する。これにより、Ａｇ塩が還元されて、Ｃｅ酸化物粒子の表面にＡｇ微粒子として析出する。 Next, the Ce oxide particles are placed in water and ultrasonically dispersed. Then, a water-soluble Ag salt such as silver nitrate is dissolved in an aqueous solution in which Ce oxide particles are dispersed. Further, this aqueous solution is irradiated with ultrasonic waves in a state where diethanolamine as a reducing agent is added. Thereby, the Ag salt is reduced and precipitated as Ag fine particles on the surface of the Ce oxide particles.
後は、このＣｅ酸化物粒子を乾燥、焼成することにより、本実施形態のＰＭ燃焼用触媒として、表面にＡｇ微粒子が均一に担持されたＣｅ酸化物粒子が作製される。この本実施形態の触媒によれば、外部エネルギーが不要で、たとえば約３００℃程度でＰＭの連続燃焼が可能であり、ディーゼルエンジンの排ガス浄化触媒として使用が可能である。 Thereafter, the Ce oxide particles are dried and fired, whereby Ce oxide particles having Ag fine particles uniformly supported on the surface are produced as the PM combustion catalyst of the present embodiment. According to the catalyst of this embodiment, external energy is unnecessary, for example, PM can be continuously burned at about 300 ° C., and can be used as an exhaust gas purification catalyst for a diesel engine.
次に、本発明を以下の実施例および比較例に基づいて、より具体的に述べることとするが、本発明は、これら実施例に限定されるものではない。 Next, the present invention will be described more specifically based on the following examples and comparative examples, but the present invention is not limited to these examples.
（実施例１）
上記実施形態に示した方法により平均粒径が２０ｎｍであるＣｅ酸化物粒子を作製し、このＣｅ酸化物粒子を１ｗｔ％分散してなるＣｅ酸化物粒子分散液を作製した。そして、この分散液中に、Ａｇ固形比が２０ｗｔ％となるように硝酸銀溶液を添加し、さらに、ジエタノールアミンを２０ｍｌ／Ｌ加えた。ここで、Ａｇ固形比が２０ｗｔ％とは、Ａｇ単独の重量とＣｅ酸化物粒子の重量とが２０：８０となることである。
Example 1
Ce oxide particles having an average particle diameter of 20 nm were prepared by the method described in the above embodiment, and a Ce oxide particle dispersion liquid in which 1 wt% of the Ce oxide particles were dispersed was prepared. And in this dispersion liquid, the silver nitrate solution was added so that Ag solid ratio might be 20 wt%, and also diethanolamine was added 20 ml / L. Here, the Ag solid ratio of 20 wt% means that the weight of Ag alone and the weight of Ce oxide particles are 20:80.
続いて、この分散液に、超音波を１時間照射して硝酸銀を還元析出させることにより、Ｃｅ酸化物粒子の表面にＡｇ微粒子を担持させた。その後、この溶液を１２０℃で蒸発乾固させたのち、５００℃で１時間の熱処理を行い、本実施例の触媒として表面にＡｇ微粒子が担持されてなるＣｅ酸化物粒子を得た。 Subsequently, Ag fine particles were supported on the surface of the Ce oxide particles by irradiating the dispersion with ultrasonic waves for 1 hour to reduce and precipitate silver nitrate. Thereafter, this solution was evaporated to dryness at 120 ° C., and then heat-treated at 500 ° C. for 1 hour to obtain Ce oxide particles having Ag fine particles supported on the surface as a catalyst of this example.
（実施例２）
平均粒径が１００ｎｍであるＣｅ酸化物粒子を１ｗｔ％分散してなるＣｅ酸化物粒子分散液に、Ａｇ固形比が２０ｗｔ％となるように硝酸銀溶液を添加した後、ジエタノールアミンを２０ｍｌ／Ｌ加え、これに超音波を１時間照射して還元析出させることにより、Ｃｅ酸化物粒子の表面にＡｇ微粒子を担持した。
(Example 2)
After adding a silver nitrate solution so that the Ag solid ratio becomes 20 wt%, to a Ce oxide particle dispersion obtained by dispersing 1 wt% of Ce oxide particles having an average particle diameter of 100 nm, 20 ml / L of diethanolamine is added, This was irradiated with ultrasonic waves for 1 hour for reduction precipitation, whereby Ag fine particles were supported on the surface of the Ce oxide particles.
そして、この溶液を１２０℃で蒸発乾固させたのち、５００℃で１時間の熱処理を行い、本実施例の触媒として、表面にＡｇ微粒子が担持されてなるＣｅ酸化物粒子を得た。 Then, this solution was evaporated to dryness at 120 ° C., and then heat-treated at 500 ° C. for 1 hour to obtain Ce oxide particles having Ag fine particles supported on the surface as a catalyst of this example.
（比較例１）
平均粒径が２０ｎｍであるＣｅ酸化物粒子を１ｗｔ％分散してなるＣｅ酸化物粒子分散液に、Ａｇ固形比が２０ｗｔ％となるように硝酸銀溶液を添加し、続いて、この溶液を１２０℃で蒸発乾固させたのち、５００℃で１時間の熱処理を行い、比較例１の触媒として表面にＡｇが担持されてなるＣｅ酸化物粒子を得た。
(Comparative Example 1)
A silver nitrate solution was added to a Ce oxide particle dispersion obtained by dispersing 1 wt% of Ce oxide particles having an average particle diameter of 20 nm so that the Ag solid ratio would be 20 wt%. After evaporating to dryness, heat treatment was carried out at 500 ° C. for 1 hour to obtain Ce oxide particles having Ag supported on the surface as a catalyst of Comparative Example 1.
（比較例２）
平均粒径が１００ｎｍであるＣｅ酸化物粒子を１ｗｔ％分散してなるＣｅ酸化物粒子分散液に、Ａｇ固形比が２０ｗｔ％となるように硝酸銀溶液を添加し、続いて、この溶液を１２０℃で蒸発乾固させたのち、５００℃で１時間の熱処理を行い、比較例２の触媒として表面にＡｇが担持されてなるＣｅ酸化物粒子を得た。
(Comparative Example 2)
A silver nitrate solution was added to a Ce oxide particle dispersion obtained by dispersing 1 wt% of Ce oxide particles having an average particle diameter of 100 nm so that the Ag solid ratio would be 20 wt%. After evaporating to dryness, heat treatment was performed at 500 ° C. for 1 hour to obtain Ce oxide particles having Ag supported on the surface as a catalyst of Comparative Example 2.
そして、これら実施例１、２および比較例１、２をＰＭ燃焼用触媒として評価した。具体的には、実際にディーゼルエンジンより採取したＰＭを触媒重量に対して５％添加し、示差熱分析計によりＰＭ燃焼試験を行った。 These Examples 1 and 2 and Comparative Examples 1 and 2 were evaluated as PM combustion catalysts. Specifically, 5% of PM actually collected from a diesel engine was added to the catalyst weight, and a PM combustion test was performed using a differential thermal analyzer.
図１は、このＰＭ燃焼試験の測定結果を示す図である。図１中、横軸に温度（単位：℃）、縦軸に触媒１ｇあたりのＰＭ燃焼率（単位：ｍｇ／ｍｉｎ）を示しており、実質的には触媒１ｇあたり１．２ｍｇ／ｍｉｎのＰＭ燃焼率があれば十分である。ここで、図１中、実施例１の結果は太い実線、実施例２の結果は細い実線、比較例１の結果は太い破線、比較例２の結果は細い破線にて表してあり、縦軸に１．２ｍｇ／ｍｉｎの実線を表してある。 FIG. 1 is a diagram showing the measurement results of this PM combustion test. In FIG. 1, the horizontal axis indicates temperature (unit: ° C.), and the vertical axis indicates PM combustion rate (unit: mg / min) per gram of catalyst, which is substantially 1.2 mg / min PM per gram of catalyst. A burning rate is sufficient. Here, in FIG. 1, the result of Example 1 is represented by a thick solid line, the result of Example 2 is represented by a thin solid line, the result of Comparative Example 1 is represented by a thick broken line, and the result of Comparative Example 2 is represented by a thin broken line. Represents a solid line of 1.2 mg / min.
この図１に示されるように、上記実施例１、２の製造方法により作製された触媒では、１．２ｍｇ／ｍｉｎの燃焼率に達する温度が２８０℃以下であり、超音波還元を行わない上記比較例１、２の製造方法により作製された比較例１、２では、燃焼温度が３３０℃以上である。このように、実施例の触媒は比較例に比べて、活性が高く、ＰＭの燃焼温度が低くなり、ディーゼルエンジンの排ガス浄化用触媒として好適であることが確認された。 As shown in FIG. 1, in the catalysts produced by the production methods of Examples 1 and 2, the temperature reaching a combustion rate of 1.2 mg / min is 280 ° C. or lower, and the ultrasonic reduction is not performed. In Comparative Examples 1 and 2 produced by the manufacturing method of Comparative Examples 1 and 2, the combustion temperature is 330 ° C. or higher. As described above, it was confirmed that the catalyst of the example had higher activity and lower PM combustion temperature than the comparative example, and was suitable as an exhaust gas purifying catalyst for a diesel engine.
なお、上記実施形態に示した製造方法は、Ｃｅ酸化物粒子の分散水溶液に水溶性Ａｇ塩を溶解させ、さらにジエタノールアミンを加え、超音波照射により、Ｃｅ酸化物粒子表面にＡｇ微粒子を還元析出させるものであり、上記実施例におけるＣｅ酸化物粒子のサイズやＣｅ酸化物粒子とＡｇとの重量比、超音波照射時間、熱処理の温度や時間などは、あくまで一具体例であり、これらを適宜設計変更してもよいことはもちろんである。 In the manufacturing method shown in the above embodiment, a water-soluble Ag salt is dissolved in a dispersed aqueous solution of Ce oxide particles, diethanolamine is further added, and Ag fine particles are reduced and deposited on the surface of the Ce oxide particles by ultrasonic irradiation. The size of the Ce oxide particles, the weight ratio of the Ce oxide particles to Ag, the ultrasonic irradiation time, the temperature and time of the heat treatment, etc. are just specific examples, and are appropriately designed. Of course, it may be changed.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010264359A (en) * | 2009-05-13 | 2010-11-25 | Honda Motor Co Ltd | Exhaust gas purifying device of internal combustion engine |
| JP2010269269A (en) * | 2009-05-22 | 2010-12-02 | Sumitomo Osaka Cement Co Ltd | Coating material for forming porous film and porous film |
| JP2011143352A (en) * | 2010-01-14 | 2011-07-28 | Mitsui Mining & Smelting Co Ltd | Method for producing catalyst for cleaning diesel exhaust gas |
| JP2015077532A (en) * | 2013-10-15 | 2015-04-23 | 本田技研工業株式会社 | Exhaust cleaning filter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06114272A (en) * | 1992-10-05 | 1994-04-26 | Mitsubishi Petrochem Co Ltd | Produciton of catalyst |
| JP2004042021A (en) * | 2002-04-18 | 2004-02-12 | Ford Global Technologies Llc | Pgm-free wash coat for diesel particulate filter with catalyst |
| JP2005125282A (en) * | 2003-10-27 | 2005-05-19 | Denso Corp | Catalyst particle and method for manufacturing the same |
| WO2006068022A1 (en) * | 2004-12-20 | 2006-06-29 | Tanaka Kikinzoku Kogyo K.K. | Combustion catalyst for treating diesel exhaust gas and method for treating diesel exhaust gas |
| WO2007043442A1 (en) * | 2005-10-06 | 2007-04-19 | Mitsui Mining & Smelting Co., Ltd. | Particulate combustion catalyst, particulate filter, and exhaust gas clean-up system |
-
2007
- 2007-09-26 JP JP2007249094A patent/JP4858386B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06114272A (en) * | 1992-10-05 | 1994-04-26 | Mitsubishi Petrochem Co Ltd | Produciton of catalyst |
| JP2004042021A (en) * | 2002-04-18 | 2004-02-12 | Ford Global Technologies Llc | Pgm-free wash coat for diesel particulate filter with catalyst |
| JP2005125282A (en) * | 2003-10-27 | 2005-05-19 | Denso Corp | Catalyst particle and method for manufacturing the same |
| WO2006068022A1 (en) * | 2004-12-20 | 2006-06-29 | Tanaka Kikinzoku Kogyo K.K. | Combustion catalyst for treating diesel exhaust gas and method for treating diesel exhaust gas |
| WO2007043442A1 (en) * | 2005-10-06 | 2007-04-19 | Mitsui Mining & Smelting Co., Ltd. | Particulate combustion catalyst, particulate filter, and exhaust gas clean-up system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010264359A (en) * | 2009-05-13 | 2010-11-25 | Honda Motor Co Ltd | Exhaust gas purifying device of internal combustion engine |
| JP2010269269A (en) * | 2009-05-22 | 2010-12-02 | Sumitomo Osaka Cement Co Ltd | Coating material for forming porous film and porous film |
| JP2011143352A (en) * | 2010-01-14 | 2011-07-28 | Mitsui Mining & Smelting Co Ltd | Method for producing catalyst for cleaning diesel exhaust gas |
| JP2015077532A (en) * | 2013-10-15 | 2015-04-23 | 本田技研工業株式会社 | Exhaust cleaning filter |
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| Publication number | Publication date |
|---|---|
| JP4858386B2 (en) | 2012-01-18 |
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