JP2001079391A - Catalyst carrier and catalyst for cleaning exhaust gas - Google Patents
Catalyst carrier and catalyst for cleaning exhaust gasInfo
- Publication number
- JP2001079391A JP2001079391A JP25851499A JP25851499A JP2001079391A JP 2001079391 A JP2001079391 A JP 2001079391A JP 25851499 A JP25851499 A JP 25851499A JP 25851499 A JP25851499 A JP 25851499A JP 2001079391 A JP2001079391 A JP 2001079391A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- exhaust gas
- carrier
- titanium oxide
- powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 92
- 238000004140 cleaning Methods 0.000 title abstract 2
- 239000000843 powder Substances 0.000 claims abstract description 67
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 53
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 49
- 239000000835 fiber Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 21
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 15
- 229910052741 iridium Inorganic materials 0.000 claims abstract description 6
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 6
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 6
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 5
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 57
- 239000000758 substrate Substances 0.000 claims description 28
- 238000000746 purification Methods 0.000 claims description 17
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 15
- 229910021536 Zeolite Inorganic materials 0.000 claims description 13
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 239000010457 zeolite Substances 0.000 claims description 13
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical group O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 12
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 12
- 239000006104 solid solution Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 238000000576 coating method Methods 0.000 abstract description 28
- 239000011248 coating agent Substances 0.000 abstract description 26
- 229910052751 metal Inorganic materials 0.000 abstract description 11
- 239000002184 metal Substances 0.000 abstract description 11
- 239000000243 solution Substances 0.000 description 24
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 21
- 238000002360 preparation method Methods 0.000 description 18
- 238000001035 drying Methods 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000003638 chemical reducing agent Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 239000010970 precious metal Substances 0.000 description 7
- 229910052878 cordierite Inorganic materials 0.000 description 6
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 6
- 239000012298 atmosphere Substances 0.000 description 5
- 239000000969 carrier Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000006260 foam Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 5
- 239000008188 pellet Substances 0.000 description 5
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 5
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 5
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 101100321669 Fagopyrum esculentum FA02 gene Proteins 0.000 description 1
- 101150096839 Fcmr gene Proteins 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、排ガス浄化用触媒
担体、特に、ディ−ゼルエンジンの排ガス浄化用に好適
な触媒担体及び該触媒担体に触媒金属を担持させた排ガ
ス浄化用触媒に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catalyst carrier for purifying exhaust gas, and more particularly to a catalyst carrier suitable for purifying exhaust gas of a diesel engine and a catalyst for purifying exhaust gas having a catalyst metal supported on the catalyst carrier.
【０００２】[0002]
【従来の技術】従来、排ガス中に含まれている窒素酸化
物（以下、「NOX 」という）を除去するための触媒とし
ては、活性アルミナ担体又は活性アルミナ被覆担体に白
金、バナジウム等の触媒金属を担持させたものが知られ
ている。Conventionally, nitrogen oxides contained in the exhaust gas (hereinafter, referred to as "NO X") as the catalyst for removing, platinum activated alumina carrier or activated alumina coated carrier, such as vanadium catalysts What carries a metal is known.
【０００３】しかしながら、上記の担体を構成していい
る活性アルミナは、排ガス中に含まれている硫黄酸化物
（以下「SOX 」という）に対して吸着性を有するため、
例えば、吸着されたSO2 が酸化され、亜硫酸塩や硫酸塩
を生成し、触媒金属の硫黄被毒の原因となっていた。[0003] However, the activated alumina constituting the above carrier has an adsorptivity to sulfur oxides (hereinafter referred to as “SO X ”) contained in exhaust gas.
For example, the adsorbed SO 2 is oxidized to generate sulfites and sulfates, which causes sulfur poisoning of the catalytic metal.
【０００４】一方、SOX に対する吸着性の低い触媒担体
としては、酸化チタン、酸化珪素、酸化ジルコニウム等
の担体が提案されているが、それらの担体に触媒金属を
担持した触媒は、その活性が不十分なものとなってい
た。中でも、酸化チタン（TiO2）は、SOX に対する吸着
性が低く有用ではあるが、触媒金属の活性を十分に活か
せないという欠点を有していた。[0004] On the other hand, titanium oxide, silicon oxide, zirconium oxide and the like have been proposed as catalyst carriers having low adsorptivity to SO X , but catalysts having a catalyst metal supported on these carriers have low activity. Was inadequate. Among them, titanium oxide (TiO 2 ) has low adsorbability to SO X and is useful, but has a drawback that the activity of the catalytic metal cannot be sufficiently utilized.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記の欠
点、問題点に鑑みてなされたものであって、その目的と
するところは、SOXを含有する排ガス、特に、ディ−ゼ
ルエンジン排ガス、中のNOXを効率良く浄化することが
可能な触媒のための担体及び該担体に触媒金属を担持さ
せた触媒を提供することである。SUMMARY OF THE INVENTION It is an object of the present invention, the drawbacks, which has been made in view of the problems, and it is an object of the exhaust gas containing SO X, in particular, di - diesel engine exhaust is to provide a catalyst supported catalytic metal to NO X to carrier and carrier for efficiently capable of purifying catalyst in.
【０００６】[0006]
【課題を解決するための手段】本発明者らは、酸化チタ
ン（TiO2）を使用した担体が、SOX に対する吸着性が低
く、SOX の影響を受けにくいことから、酸化チタンを使
用した担体の耐熱性を高めるための研究をしていたとこ
ろ、平均繊維径0.1 〜１μｍ、平均繊維長さ１〜50μｍ
の繊維状の単斜晶酸化チタン粉末を使用した担体が、SO
X に対する吸着性が低く、なおかつ、触媒金属の活性を
高める作用を有することを見いだし、本発明を完成した
ものである。Means for Solving the Problems The present inventors have found that a carrier using titanium oxide (TiO 2) is a low adsorptivity for SO X, since less susceptible to SO X, using titanium oxide When I was studying to improve the heat resistance of the carrier, the average fiber diameter was 0.1-1 μm and the average fiber length was 1-50 μm.
The carrier using fibrous monoclinic titanium oxide powder is SO
The present inventors have found that the compound has a low adsorptivity to X and has an effect of increasing the activity of a catalytic metal, and has completed the present invention.
【０００７】即ち、本発明に係る排ガス浄化用触媒担体
は、「平均繊維径0.1 〜１μｍ、平均繊維長さ１〜50μ
ｍの繊維状の単斜晶酸化チタン粉末を成形又は担体基材
にコ−ティングしたことを特徴とする排ガス浄化用触媒
担体。」（請求項１）を要旨（発明を特定する事項）と
し、 ・前記担体基材が、モノリス担体基材、フォ−ムフィル
タ、ハニカムフィルタ、ペレットの少なくとも１種であ
ること、 ・触媒担体が、ディ−ゼルエンジン排ガス浄化用である
ことを特徴とするものであること（請求項４）、を特徴
とするものである。That is, the exhaust gas purifying catalyst carrier according to the present invention has an average fiber diameter of 0.1 to 1 μm and an average fiber length of 1 to 50 μm.
m. A catalyst carrier for purifying exhaust gas, wherein a fibrous monoclinic titanium oxide powder having a particle size of m is coated or coated on a carrier substrate. (Claim 1), wherein the carrier substrate is at least one of a monolith carrier substrate, a foam filter, a honeycomb filter, and a pellet; The present invention is characterized in that it is used for purifying diesel engine exhaust gas (claim 4).
【０００８】また、本発明に係る排ガス浄化用触媒担体
は、「平均繊維径0.1 〜１μｍ、平均繊維長さ１〜50μ
ｍの繊維状の単斜晶酸化チタン粉末にゼオライト粉末及
び／又は酸素放出材粉末を混合した粉末を成形又は担体
基材にコ−ティングしたことを特徴とする排ガス浄化用
触媒担体。」（請求項２）を要旨（発明を特定する事
項）とし、 ・前記酸素放出材粉末が、セリア粉末又はセリアとジル
コニアの固溶体粉末であること（請求項３）、 ・前記担体基材が、モノリス担体基材、フォ−ムフィル
タ、ハニカムフィルタ、ペレットの少なくとも１種であ
ること、 ・触媒担体が、ディ−ゼルエンジン排ガス浄化用である
こと（請求項４）、を特徴とするものである。Further, the catalyst carrier for purifying exhaust gas according to the present invention has an average fiber diameter of 0.1 to 1 μm and an average fiber length of 1 to 50 μm.
m. A catalyst carrier for purifying exhaust gas, wherein a powder obtained by mixing a zeolite powder and / or an oxygen-releasing material powder with a fibrous monoclinic titanium oxide powder of m is molded or coated on a carrier substrate. (Claim 2) as a gist (items specifying the invention), wherein the oxygen releasing material powder is ceria powder or a solid solution powder of ceria and zirconia (Claim 3); At least one of a monolithic carrier substrate, a foam filter, a honeycomb filter, and a pellet. The catalyst carrier is for purifying diesel engine exhaust gas (Claim 4).
【０００９】また、本発明に係る排ガス浄化用触媒は、
「平均繊維径0.1 〜１μｍ、平均繊維長さ１〜50μｍの
繊維状の単斜晶酸化チタン粉末を成形又は担体基材にコ
−ティングしたことを特徴とする排ガス浄化用触媒担体
に、Ｐｔ、Ｐｄ、Ｒｈ、Ｉｒ、Ｒｕ等から選ばれた少な
くとも１種の貴金属を担持させたことを特徴とする排ガ
ス浄化用触媒。」（請求項５）を要旨（発明を特定する
事項）とし、 ・前記担体基材が、モノリス担体基材、フォ−ムフィル
タ、ハニカムフィルタ、ペレットの少なくとも１種であ
ること、 ・触媒が、ディ−ゼルエンジン排ガス浄化用であること
（請求項６）、を特徴とするものである。Further, the exhaust gas purifying catalyst according to the present invention comprises:
Pt, a catalyst carrier for purifying exhaust gas, characterized in that fibrous monoclinic titanium oxide powder having an average fiber diameter of 0.1 to 1 μm and an average fiber length of 1 to 50 μm is molded or coated on a carrier substrate. An exhaust gas purifying catalyst characterized by carrying at least one noble metal selected from Pd, Rh, Ir, Ru, etc. "(claim 5). The carrier substrate is at least one of a monolith carrier substrate, a foam filter, a honeycomb filter, and a pellet. The catalyst is for purifying diesel engine exhaust gas (Claim 6). Things.
【００１０】また、本発明に係る排ガス浄化用触媒は、
「平均繊維径0.1 〜１μｍ、平均繊維長さ１〜50μｍの
繊維状の単斜晶酸化チタン粉末にゼオライト粉末及び／
又は酸素放出材粉末を混合した粉末を成形又は担体基材
にコ−ティングした排ガス浄化用触媒担体に、Ｐｔ、Ｐ
ｄ、Ｒｈ、Ｉｒ、Ｒｕ等から選ばれた少なくとも１種の
貴金属を担持させたことを特徴とする排ガス浄化用触
媒。」（請求項５）を要旨（発明を特定する事項）と
し、 ・前記酸素放出材粉末が、セリア粉末又はセリアとジル
コニアの固溶体粉末であること、 ・前記担体基材が、モノリス担体基材、フォ−ムフィル
タ、ハニカムフィルタ、ペレットの少なくとも１種であ
ること、 ・触媒が、ディ−ゼルエンジン排ガス浄化用であること
（請求項６）、を特徴とするものである。Further, the exhaust gas purifying catalyst according to the present invention comprises:
"Fibrous monoclinic titanium oxide powder having an average fiber diameter of 0.1 to 1 μm and an average fiber length of 1 to 50 μm is added to zeolite powder and / or
Alternatively, Pt, P is added to an exhaust gas purifying catalyst carrier obtained by molding or coating a powder mixed with an oxygen releasing material powder on a carrier substrate.
An exhaust gas purifying catalyst comprising at least one noble metal selected from d, Rh, Ir, Ru and the like. (Claim 5) as a gist (items specifying the invention), wherein the oxygen releasing material powder is ceria powder or a solid solution powder of ceria and zirconia; It is at least one of a foam filter, a honeycomb filter and a pellet. The catalyst is for purifying diesel engine exhaust gas (claim 6).
【００１１】[0011]
【発明の実施の形態】本発明は、平均繊維径0.1 〜１μ
ｍ、平均繊維長さ１〜50μｍの繊維状の単斜晶酸化チタ
ン粉末(以下、「単斜晶酸化チタン粉末」という)を使用
することを特徴とするものである。このものは、酸化チ
タン粉末の中でも特に繊維形状であり、結晶構造が単斜
晶系であり、真比重が 3.5前後であるという特徴を有し
ている。かかる単斜晶酸化チタン粉末としては、商業的
には商品名「ＭＴＷ」として大塚化学（株）より市販さ
れているものが入手でき、このものは、平均繊維径0.1
〜 0.5μｍ、平均繊維長さ１〜10μｍ、アスぺクト比５
〜15で、真比重が 3.5、ｐＨが８〜９の繊維状の単斜晶
酸化チタンからなる粉末であり、集合物としての嵩比重
は0.11、比表面積は、15〜20ｍ2 ／ｇのものである。単
斜晶酸化チタン粉末の平均繊維径が0.1 〜１μｍ、平均
繊維長さが１〜50μｍ以外であるときには、ガス拡散が
向上しにくく、また、触媒金属の分散担持性が低下す
る。本発明に係る排ガス浄化用触媒担体は、前記特定の
単斜晶酸化チタン粉末を用いることにより、当該単斜晶
酸化チタン粉末の基材からの脱落が少なく、また、NOX
浄化効率のよい触媒を提供することができる。BEST MODE FOR CARRYING OUT THE INVENTION The present invention has an average fiber diameter of 0.1-1 μm.
m, a fibrous monoclinic titanium oxide powder having an average fiber length of 1 to 50 μm (hereinafter referred to as “monoclinic titanium oxide powder”). This is a particularly fiber-shaped titanium oxide powder, has a monoclinic crystal structure, and has a true specific gravity of about 3.5. Such monoclinic titanium oxide powder is commercially available from Otsuka Chemical Co., Ltd. under the trade name "MTW" and has an average fiber diameter of 0.1%.
0.5 μm, average fiber length 1-10 μm, aspect ratio 5
~ 15, a powder composed of fibrous monoclinic titanium oxide having a true specific gravity of 3.5 and a pH of 8 to 9, having a bulk specific gravity of 0.11 and a specific surface area of 15 to 20 m 2 / g as an aggregate It is. When the average fiber diameter of the monoclinic titanium oxide powder is other than 0.1 to 1 μm and the average fiber length is other than 1 to 50 μm, the gas diffusion is hardly improved, and the dispersibility of the catalyst metal is reduced. The catalyst carrier for purifying exhaust gas according to the present invention uses the specific monoclinic titanium oxide powder, so that the monoclinic titanium oxide powder is less likely to fall off from the base material, and NO X
A catalyst with high purification efficiency can be provided.
【００１２】本発明に係る排ガス浄化用触媒は、担体基
材と、担体基材の表面に形成される 上記単斜晶酸化チタン粉末使用コ−ト層、上記単斜
晶酸化チタン粉末とゼオライト粉末との混合物使用コ−
ト層、上記単斜晶酸化チタン粉末とゼオライト粉末と
セリア等の酸素放出材を含む複合酸化物との混合物使用
コ−ト層、この〜のコ−ト層のいずれかに担持され
た貴金属と、からなる。酸素放出材としては、他に、セ
リア・ジルコニア固溶体、セリア・ジルコニア・カルシ
ア固溶体、セリア・ジルコニア・イットリア固溶体等が
挙げられる。The exhaust gas purifying catalyst according to the present invention comprises a carrier substrate, a coat layer using the monoclinic titanium oxide powder formed on the surface of the carrier substrate, the monoclinic titanium oxide powder and the zeolite powder. Use of mixture with
A coating layer using a mixture of the above monoclinic titanium oxide powder, zeolite powder, and a composite oxide containing an oxygen releasing material such as ceria; a noble metal supported on any of the coating layers , Consisting of Other examples of the oxygen releasing material include a ceria-zirconia solid solution, a ceria-zirconia-calcia solid solution, a ceria-zirconia-yttria solid solution, and the like.
【００１３】担体基材は、従来のガソリンエンジンに用
いられている排気ガス浄化触媒の担体基材と同様のもの
で良く、モノリス担体基材、フォ−ムフィルタ、ハニカ
ムフィルタ、ペレット等が用いられる。その材質は、コ
−ディエライト等のセラミックスあるいは金属などから
選ばれる。The carrier substrate may be the same as the carrier substrate of an exhaust gas purifying catalyst used in a conventional gasoline engine, and a monolith carrier substrate, a foam filter, a honeycomb filter, a pellet, or the like is used. The material is selected from ceramics such as cordierite or metal.
【００１４】上記の〜のコ−ト層は、上記単斜晶酸
化チタン粉末又は上記単斜晶酸化チタン粉末を含む混合
物粉末に酸化チタンゾル、シリカゾル又はジルコニアゾ
ル等のバインダ−を適量のイオン交換水と共に添加し、
アトライタ等の粉砕、混合機を用いてスラリ−化した
後、担体基材上にウオッシュコ−トし、乾燥した後、45
0 〜550 ℃程度で焼成することにより形成される。The above-mentioned coating layer is formed by adding a binder such as titanium oxide sol, silica sol or zirconia sol to the above-mentioned monoclinic titanium oxide powder or a mixed powder containing the above-mentioned monoclinic titanium oxide powder in an appropriate amount of ion-exchanged water. Together with
After pulverization of an attritor or the like, slurrying using a mixer, wash coating on a carrier substrate, drying, and
It is formed by firing at about 0 to 550 ° C.
【００１５】排ガス浄化用触媒は、上記のようにして得
られた担体の上記〜のコ−ト層にＰｔ、Ｐｄ、Ｒ
ｈ、Ｉｒ、Ｒｕ等から選ばれた少なくとも１種の貴金属
を担持することにより得られる。Ｐｔ等の貴金属の担持
は、上記のようにして得られた担体の上記〜のコ−
ト層にＰｔ等の貴金属を溶解した硝酸水溶液やアンミン
水溶液を含浸させ、乾燥した後に、 350℃程度の温度で
焼成することにより行われる。Ｐｔ等の貴金属の担持量
は、上記単斜晶酸化チタン粉末又は上記単斜晶酸化チタ
ン粉末を含む混合粉末 100重量部に対し、0.5 〜10重量
部の範囲が好ましい。The catalyst for purifying exhaust gas comprises Pt, Pd, R on the above-mentioned coat layer of the carrier obtained as described above.
It is obtained by supporting at least one noble metal selected from h, Ir, Ru and the like. The supporting of a noble metal such as Pt is carried out by using the above-described core of the carrier obtained as described above.
The layer is impregnated with an aqueous solution of nitric acid or ammine in which a noble metal such as Pt is dissolved, dried, and then fired at a temperature of about 350 ° C. The supporting amount of the noble metal such as Pt is preferably in the range of 0.5 to 10 parts by weight with respect to 100 parts by weight of the monoclinic titanium oxide powder or the mixed powder containing the monoclinic titanium oxide powder.
【００１６】また、排ガス浄化用触媒は、上記のような
担体基材を使用すること無しに、上記単斜晶酸化チタ
ン粉末、上記単斜晶酸化チタン粉末とゼオライト粉末
との混合物、上記単斜晶酸化チタン粉末とゼオライト
粉末とセリア等の酸素放出材を含む複合酸化物との混合
物、に酸化チタンゾル、シリカゾル又はジルコニアゾル
等のバインダ−を添加し、成形し、 350℃程度の温度で
焼成することによりｉ〜iiiの担体を得、そのｉ〜iiiの
担体に、Ｐｔ、Ｐｄ、Ｒｈ、Ｉｒ、Ｒｕ等から選ばれた
少なくとも１種の貴金属を担持することにより得られ
る。Ｐｔ等の貴金属の担持は、上記のようにして得られ
た上記のｉ〜iiiの担体をＰｔ等の貴金属を溶解した硝
酸水溶液やアンミン水溶液に浸漬し、乾燥した後、350
℃程度の温度で焼成することにより得られる。Further, the exhaust gas purifying catalyst can be prepared by using the above monoclinic titanium oxide powder, a mixture of the above monoclinic titanium oxide powder and zeolite powder, without using the above carrier substrate. A binder such as titanium oxide sol, silica sol or zirconia sol is added to a mixture of crystalline titanium oxide powder, zeolite powder and a composite oxide containing an oxygen releasing material such as ceria, molded, and fired at a temperature of about 350 ° C. In this manner, the carriers i to iii are obtained, and the carriers i to iii are obtained by supporting at least one noble metal selected from Pt, Pd, Rh, Ir, Ru, and the like. The support of the noble metal such as Pt is carried out by immersing the carriers i to iii obtained as described above in a nitric acid aqueous solution or an ammine aqueous solution in which a noble metal such as Pt is dissolved, and drying,
It is obtained by firing at a temperature of about ° C.
【００１７】[0017]
【実施例】次に、本発明の実施例を比較例と共に挙げ、
本発明を具体的に説明するが、本発明は、以下の実施例
によって限定されるものではない。Next, examples of the present invention will be described together with comparative examples.
The present invention will be specifically described, but the present invention is not limited by the following examples.
【００１８】［実施例１〜実施例３、比較例１〜比較例
２］単斜晶酸化チタン粉末（商品名「ＭＴＷ」大塚化学
（株）製）を使用した触媒担体の調製及びその触媒担体
を使用した排ガス浄化用触媒の調製（実施例）と従来の
触媒（比較例）の調製について詳細に説明する。 ［実施例１］ （担体基材＋単斜晶酸化チタン粉末＋貴金属）系触媒 ・コ−ト液調製工程：単斜晶酸化チタン粉末1000ｇ、酸
化チタンゾル（TA−15 日産化学社製）625ｇ及びイオ
ン交換水1125ｇを湿式粉砕機アトライタに入れ、20分間
ミリングしてコ−ト液を得た。 ・触媒担体調製工程（コ−ティング工程）：担体基材と
して、コ−ディエライト製モノリス、 1.7リットル容積
の断面楕円の柱状形を使用し、担体基材の端面から上記
のコ−ト液を流し、余分なコ−ト液をブロアで飛ばし
た。次に、温風で30分乾燥後、更に、 250℃で１時間乾
燥した。このようなコ−ティング工程を３回繰り返して
行い、乾燥後の担持量を 294ｇにした。次いで、大気中
500℃で３時間焼成し、触媒担体を得た。 ・触媒調製工程（貴金属担持工程）：Ｐｔ量 3.4ｇを含
むテトラアンミンＰｔ（２）ハイドロオキサイドをイオ
ン交換水で希釈して 420ｇにして全液を上記の触媒担体
に吸水含浸させた。次に、温風で１時間乾燥後、大気中
350℃で３時間焼成し、排ガス浄化用触媒を得た。[Examples 1 to 3, Comparative Examples 1 and 2] Preparation of catalyst carrier using monoclinic titanium oxide powder (trade name "MTW" manufactured by Otsuka Chemical Co., Ltd.) and its catalyst carrier The preparation of an exhaust gas purifying catalyst (Example) using the catalyst and the preparation of a conventional catalyst (Comparative Example) will be described in detail. [Example 1] (Carrier base material + monoclinic titanium oxide powder + precious metal) -based catalyst-Coat solution preparation step: 1000 g of monoclinic titanium oxide powder, 625 g of titanium oxide sol (TA-15 manufactured by Nissan Chemical Industries, Ltd.) and 1125 g of ion-exchanged water was put into a wet grinder attritor and milled for 20 minutes to obtain a coating solution. -Catalyst carrier preparation step (coating step): A cordierite monolith, a 1.7 liter column-shaped column having an elliptical cross section was used as a carrier substrate, and the above coating solution was applied from the end face of the carrier substrate. Then, the excess coating solution was blown off with a blower. Next, after drying with warm air for 30 minutes, it was further dried at 250 ° C. for 1 hour. Such a coating step was repeated three times, and the supported amount after drying was 294 g. Then in the atmosphere
It was calcined at 500 ° C. for 3 hours to obtain a catalyst carrier. Catalyst preparation step (precious metal supporting step): Tetraammine Pt (2) hydroxide containing 3.4 g of Pt was diluted with ion-exchanged water to 420 g, and the whole solution was impregnated with water into the above catalyst carrier. Next, after drying with warm air for 1 hour,
It was calcined at 350 ° C. for 3 hours to obtain an exhaust gas purifying catalyst.
【００１９】［実施例２］ （担体基材＋単斜晶酸化チタン粉末＋ゼオライト粉末＋
セリア等の酸素放出材を含む複合酸化物＋貴金属）系触
媒 ・コ−ト液調製工程：単斜晶酸化チタン粉末 300ｇ、ゼ
オライト（HSZ-840NHA 東ソ−社製）を 600ｇ、セリア
３部とジルコニア７部の固溶体を酸素放出材として60
ｇ、シリカゾル（スノ−テックス40 日産化学社製） 2
74ｇ及びイオン交換水 812ｇを湿式粉砕機アトライタに
入れ、15分間ミリングしてコ−ト液を得た。 ・触媒担体調製工程（コ−ティング工程）：担体基材と
して、コ−ディエライト製モノリス、 1.7リットル容積
の断面楕円の柱状形を使用し、担体基材の端面から上記
のコ−ト液を流し、余分なコ−ト液をブロアで飛ばし
た。次に、温風で30分乾燥後、更に、 250℃で１時間乾
燥した。このようなコ−ティング工程を４回繰り返して
行ない、乾燥後の担持量を 320ｇにした。次いで、大気
中 500℃で３時間焼成し、触媒担体を得た。 ・触媒調製工程（貴金属担持工程）：Ｐｔ量 3.4ｇを含
むテトラアンミンＰｔ（２）ハイドロオキサイドをイオ
ン交換水で希釈して 420ｇにして全液を上記の触媒担体
に吸水含浸させた。次に、温風で１時間乾燥後、大気中
350℃で３時間焼成し、排ガス浄化用触媒を得た。[Example 2] (Carrier substrate + monoclinic titanium oxide powder + zeolite powder +
Composite oxide + noble metal) catalyst containing oxygen releasing material such as ceria ・ Coating liquid preparation process: 300 g of monoclinic titanium oxide powder, 600 g of zeolite (HSZ-840NHA manufactured by Tohso), 3 parts of ceria A solid solution of 7 parts of zirconia is used as an oxygen releasing material.
g, silica sol (Snow-Tex 40 manufactured by Nissan Chemical Industries, Ltd.) 2
74 g and 812 g of ion-exchanged water were put into a wet grinder attritor and milled for 15 minutes to obtain a coating solution. -Catalyst carrier preparation step (coating step): A cordierite monolith, a 1.7 liter column-shaped column with an elliptical cross section was used as a carrier substrate, and the above coating solution was applied from the end face of the carrier substrate. Then, the excess coating solution was blown off with a blower. Next, after drying with warm air for 30 minutes, it was further dried at 250 ° C. for 1 hour. Such a coating process was repeated four times, and the supported amount after drying was 320 g. Then, it was calcined at 500 ° C. for 3 hours in the atmosphere to obtain a catalyst carrier. Catalyst preparation step (precious metal supporting step): Tetraammine Pt (2) hydroxide containing 3.4 g of Pt was diluted with ion-exchanged water to make 420 g, and the whole solution was impregnated with water into the above catalyst carrier. Next, after drying with warm air for 1 hour,
It was calcined at 350 ° C. for 3 hours to obtain an exhaust gas purifying catalyst.
【００２０】［実施例３］ （担体基材＋単斜晶酸化チタン粉末＋ゼオラト粉末＋貴
金属）系触媒 ・コ−ト液調製工程：単斜晶酸化チタン粉末 300ｇ、ゼ
オライト（HSZ-840NHA 東ソ−社製）を 600ｇ、シリカ
ゾル（スノ−テックス40 日産化学社製） 274ｇ及びイ
オン交換水 812ｇを湿式粉砕機アトライタに入れ、15分
間ミリングしてコ−ト液を得た。 ・触媒担体調製工程（コ−ティング工程）：担体基材と
して、コ−ディエライト製モノリス、 1.7リットル容積
の断面楕円の柱状形を使用し、担体基材の端面から上記
のコ−ト液を流し、余分なコ−ト液をブロアで飛ばし
た。次に、温風で30分乾燥後、更に、 250℃で１時間乾
燥した。このようなコ−ティング工程を４回繰り返して
行ない、乾燥後の担持量を 315ｇにした。次いで、大気
中 500℃で３時間焼成し、触媒担体を得た。 ・触媒調製工程（貴金属担持工程）：Ｐｔ量 3.4ｇを含
むテトラアンミンＰｔ（２）ハイドロオキサイドをイオ
ン交換水で希釈して 420ｇにして全液を上記の触媒担体
に吸水含浸させた。次に、温風で１時間乾燥後、大気中
350℃で３時間焼成し、排ガス浄化用触媒を得た。[Example 3] (Carrier base material + monoclinic titanium oxide powder + zeolite powder + precious metal) based catalyst-Coat solution preparation step: 300 g of monoclinic titanium oxide powder, zeolite (HSZ-840NHA Toso) 600 g), 274 g of silica sol (Sno-Tex 40 manufactured by Nissan Chemical Industries, Ltd.) and 812 g of ion-exchanged water were placed in a wet grinder attritor and milled for 15 minutes to obtain a coating solution. -Catalyst carrier preparation step (coating step): A cordierite monolith, a 1.7 liter column-shaped column having an elliptical cross section was used as a carrier substrate, and the above coating solution was applied from the end face of the carrier substrate. Then, the excess coating solution was blown off with a blower. Next, after drying with warm air for 30 minutes, it was further dried at 250 ° C. for 1 hour. Such a coating step was repeated four times, and the supported amount after drying was 315 g. Then, it was calcined at 500 ° C. for 3 hours in the atmosphere to obtain a catalyst carrier. Catalyst preparation step (precious metal supporting step): Tetraammine Pt (2) hydroxide containing 3.4 g of Pt was diluted with ion-exchanged water to 420 g, and the whole solution was impregnated with water into the above catalyst carrier. Next, after drying with warm air for 1 hour,
It was calcined at 350 ° C. for 3 hours to obtain an exhaust gas purifying catalyst.
【００２１】［比較例１］ （担体基材＋酸化チタン粉末＋貴金属）系触媒 ・コ−ト液調製工程：酸化チタン粉末（P-25 デグサ社
製、比表面積：43．8m2 ／ｇ、アナタ−ゼ）100ｇ、酸
化チタンゾル（TA-15 日産化学社製） 627ｇ及びイオン
交換水1125ｇを湿式粉砕機アトライタに入れ、20分間ミ
リングしてコ−ト液を得た。 ・触媒担体調製工程（コ−ティング工程）：担体基材と
して、コ−ディエライト製モノリス、 1.7リットル容積
の断面楕円の柱状形を使用し、担体基材の端面から上記
のコ−ト液を流し、余分なコ−ト液をブロアで飛ばし
た。次に、温風で30分乾燥後、更に、 250℃で１時間乾
燥した。このようなコ−ティング工程を３回繰り返して
行ない、乾燥後の担持量を 294ｇにした。次いで、大気
中 500℃で３時間焼成し、触媒担体を得た。 ・触媒調製工程（貴金属担持工程）：Ｐｔ量 2.0ｇを含
むテトラアンミンＰｔ（２）ハイドロオキサイドをイオ
ン交換水で希釈して 420ｇにして全液を上記の触媒担体
に吸水含浸させた。次に、温風で１時間乾燥後、大気中
350℃で３時間焼成し、排ガス浄化用触媒を得た。[Comparative Example 1] (Carrier base material + titanium oxide powder + noble metal) -based catalyst • Coat solution preparation step: titanium oxide powder (P-25, manufactured by Degussa, specific surface area: 43.8 m 2 / g; Anatase (100 g), titanium oxide sol (TA-15, manufactured by Nissan Chemical Co., Ltd.) (627 g) and ion-exchanged water (1125 g) were placed in a wet grinder attritor and milled for 20 minutes to obtain a coating solution. -Catalyst carrier preparation step (coating step): A cordierite monolith, a 1.7 liter column-shaped column having an elliptical cross section was used as a carrier substrate, and the above coating solution was applied from the end face of the carrier substrate. Then, the excess coating solution was blown off with a blower. Next, after drying with warm air for 30 minutes, it was further dried at 250 ° C. for 1 hour. Such a coating process was repeated three times, and the supported amount after drying was 294 g. Then, it was calcined at 500 ° C. for 3 hours in the atmosphere to obtain a catalyst carrier. Catalyst preparation step (precious metal supporting step): Tetraammine Pt (2) hydroxide containing 2.0 g of Pt was diluted with ion-exchanged water to make 420 g, and the whole solution was impregnated with water into the above catalyst carrier. Next, after drying with warm air for 1 hour,
It was calcined at 350 ° C. for 3 hours to obtain an exhaust gas purifying catalyst.
【００２２】［比較例２］ （担体基材＋酸化チタン粉末＋ゼオライト粉末＋セリア
等の酸素放出材を含む複合酸化物＋貴金属）系触媒 ・コ−ト液調製工程：酸化チタン粉末（酸化チタン（i
v） 和光純薬工業社製、比表面積：7m2 ／ｇ、アナタ
−ゼ） 300ｇ、ゼオライト（HSZ-840NHA 東ソ−社製）
を 600ｇ、セリア３部とジルコニア７部の固溶体を酸素
放出材として60ｇ、シリカゾル（スノ−テックス40 日
産化学社製） 274ｇ及びイオン交換水 812ｇを湿式粉砕
機アトライタに入れ、15分間ミリングしてコ−ト液を得
た。 ・触媒担体調製工程（コ−ティング工程）：担体基材と
して、コ−ディエライト製モノリス、 1.7リットル容積
の断面楕円の柱状形を使用し、担体基材の端面から上記
のコ−ト液を流し、余分なコ−ト液をブロアで飛ばし
た。次に、温風で30分乾燥後、更に、 250℃で１時間乾
燥した。このようなコ−ティング工程を４回繰り返して
行ない、乾燥後の担持量を 320ｇにした。次いで、大気
中 500℃で３時間焼成し、触媒担体を得た。 ・触媒調製工程（貴金属担持工程）：Ｐｔ量 2.0ｇを含
むテトラアンミンＰｔ（２）ハイドロオキサイドをイオ
ン交換水で希釈して 420ｇにして全液を上記の触媒担体
に吸水含浸させた。次に、温風で１時間乾燥後、大気中
350℃で３時間焼成し、排ガス浄化用触媒を得た。[Comparative Example 2] (Carrier base material + titanium oxide powder + zeolite powder + composite oxide containing oxygen releasing material such as ceria + noble metal) -based catalyst • Coat solution preparation step: titanium oxide powder (titanium oxide) (I
v) Wako Pure Chemical Industries, Ltd., specific surface area: 7 m 2 / g, anatase) 300 g, zeolite (HSZ-840NHA Tosoh Corporation)
600 g, a solid solution of 3 parts of ceria and 7 parts of zirconia as an oxygen releasing material, 60 g, 274 g of silica sol (Sno-Tex 40 manufactured by Nissan Chemical Co., Ltd.) and 812 g of ion-exchanged water in a wet grinder attritor, and milling for 15 minutes. -Solution was obtained. -Catalyst carrier preparation step (coating step): A cordierite monolith, a 1.7 liter column-shaped column having an elliptical cross section was used as a carrier substrate, and the above coating solution was applied from the end face of the carrier substrate. Then, the excess coating solution was blown off with a blower. Next, after drying with warm air for 30 minutes, it was further dried at 250 ° C. for 1 hour. Such a coating step was repeated four times, and the supported amount after drying was 320 g. Then, it was calcined at 500 ° C. for 3 hours in the atmosphere to obtain a catalyst carrier. Catalyst preparation step (precious metal supporting step): Tetraammine Pt (2) hydroxide containing 2.0 g of Pt was diluted with ion-exchanged water to make 420 g, and the whole solution was impregnated with water into the above catalyst carrier. Next, after drying with warm air for 1 hour,
It was calcined at 350 ° C. for 3 hours to obtain an exhaust gas purifying catalyst.
【００２３】以下に示すような方法で、実施例１、２、
３及び比較例１、２に示す３種類の排ガス浄化用触媒に
ついて、最大NOX 浄化率を測定した結果を表１に、ＨＣ
50％浄化温度を表２に示し、NOX 浄化率と入ガス温度と
の関係を図１、２、５、６に、ＴＨＣ浄化率と入ガス温
度との関係を図３、４、７、８に示した。 （NOX 転化率の試験方法） ディ−ゼルエンジン実排にて触媒の性能を測定した。 １）エンジン IDI ．排気量2.4L ２）燃料 Ｓ分0.05％含有軽油 ３）還元剤の排気管添加（触媒前方） ａ）軽油加熱添加：常時1000ppmC ｂ）プロピレン添加：常時1000ppmC ４）測定条件 エンジン回転数1500rpm でトルク変
化により排ガス温度制御 ａ）昇温試験（20℃／min ） ｂ）降温試験（20℃／min ）In the following manner, Examples 1, 2,
Table 1 shows the results of measuring the maximum NO X purification rates of the three types of exhaust gas purifying catalysts shown in Comparative Example 1 and Comparative Examples 1 and 2.
Table 2 shows the 50% purification temperature, the relationship between the NO X purification rate and the incoming gas temperature is shown in FIGS. 1, 2, 5, and 6, and the relationship between the THC purification rate and the incoming gas temperature is shown in FIGS. 8 is shown. (Method of testing NO X conversion) di - and measure the performance of the catalyst in diesel engine actual discharge. 1) Engine IDI. Displacement volume 2.4L 2) Fuel Oil containing 0.05% of S content 3) Addition of reducing agent to exhaust pipe (front of catalyst) a) Addition of heating of diesel oil: Always 1000ppmC b) Addition of propylene: Always 1000ppmC 4) Measurement conditions Torque at 1500rpm engine speed Exhaust gas temperature control by change a) Heating test (20 ° C / min) b) Cooling test (20 ° C / min)
【００２４】[0024]
【表１】 [Table 1]
【００２５】[0025]
【表２】 [Table 2]
【００２６】表１、表２、図１〜８の結果から、本発明
の単斜晶酸化チタン粉末を使用した排ガス浄化用触媒
（実施例１、２、３）が、市販されている酸化チタン粉
末を使用した排ガス浄化用触媒（比較例１、２）に比し
て優れたNOX 浄化率、ＨＣ浄化率を示すことが明らかで
ある。From the results shown in Tables 1 and 2 and FIGS. 1 to 8, the catalyst for purifying exhaust gas using the monoclinic titanium oxide powder of the present invention (Examples 1, 2, and 3) is commercially available titanium oxide. It is clear that the exhaust gas purifying catalyst (Comparative Examples 1 and 2) using the powder exhibits an excellent NO X purification rate and HC purification rate as compared with the catalyst.
【００２７】[0027]
【発明の効果】本発明は、以上詳記したとおり、単斜晶
酸化チタン粉末を使用して成形した担体に排ガス浄化用
触媒金属を担持した排ガス浄化用触媒は、特に、ディ−
ゼルエンジン排ガス浄化用触媒として、高いNOX 浄化率
をもたらす等の優れた効果を奏するものである。As described in detail above, the present invention relates to an exhaust gas purifying catalyst comprising an exhaust gas purifying catalyst metal supported on a carrier formed using monoclinic titanium oxide powder.
As diesel engine exhaust gas purifying catalyst, in which excellent effects such as resulting in high NO X purification rate.
【図１】還元剤として、プロピレンをディ−ゼルエンジ
ン排気管に添加した場合の、昇温時の入ガス温度とNOX
浄化率との関係を示すグラフである。FIG. 1 Inlet gas temperature and NO X at the time of temperature rise when propylene is added to a diesel engine exhaust pipe as a reducing agent
It is a graph which shows the relationship with a purification rate.
【図２】還元剤として、プロピレンをディ−ゼルエンジ
ン排気管に添加した場合の、降温時の入ガス温度とNOX
浄化率との関係を示すグラフである。FIG. 2 is a graph showing the relationship between the inlet gas temperature at the time of temperature decrease and NO X when propylene is added to a diesel engine exhaust pipe as a reducing agent.
It is a graph which shows the relationship with a purification rate.
【図３】還元剤として、プロピレンをディ−ゼルエンジ
ン排気管に添加した場合の、昇温時の入ガス温度とＴＨ
Ｃ浄化率との関係を示すグラフである。FIG. 3 is a graph showing gas inlet temperature and TH at the time of temperature increase when propylene is added to a diesel engine exhaust pipe as a reducing agent.
It is a graph which shows the relationship with C purification rate.
【図４】還元剤として、プロピレンをディ−ゼルエンジ
ン排気管に添加した場合の、降温時の入ガス温度とＴＨ
Ｃ浄化率との関係を示すグラフである。FIG. 4 is a graph showing gas inlet temperature and TH at the time of temperature decrease when propylene is added to a diesel engine exhaust pipe as a reducing agent.
It is a graph which shows the relationship with C purification rate.
【図５】還元剤として、軽油をディ−ゼルエンジン排気
管に添加した場合の、昇温時の入ガス温度とNOX 浄化率
との関係を示すグラフである。FIG. 5 is a graph showing the relationship between the gas input temperature at the time of temperature rise and the NO X purification rate when light oil is added to a diesel engine exhaust pipe as a reducing agent.
【図６】還元剤として、軽油をディ−ゼルエンジン排気
管に添加した場合の、降温時の入ガス温度とNOX 浄化率
との関係を示すグラフである。FIG. 6 is a graph showing the relationship between the gas input temperature at the time of temperature decrease and the NO X purification rate when light oil is added to a diesel engine exhaust pipe as a reducing agent.
【図７】還元剤として、軽油をディ−ゼルエンジン排気
管に添加した場合の、昇温時の入ガス温度とＴＨＣ浄化
率との関係を示すグラフである。FIG. 7 is a graph showing a relationship between an incoming gas temperature at the time of temperature rise and a THC purification rate when light oil is added to a diesel engine exhaust pipe as a reducing agent.
【図８】還元剤として、軽油をディ−ゼルエンジン排気
管に添加した場合の、降温時の入ガス温度とＴＨＣ浄化
率との関係を示すグラフである。FIG. 8 is a graph showing the relationship between the temperature of incoming gas at the time of cooling and the THC purification rate when light oil is added to a diesel engine exhaust pipe as a reducing agent.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｂ０１Ｊ 32/00 ＺＡＢ Ｂ０１Ｊ 35/02 Ｂ 35/02 Ｆ０１Ｎ 3/28 ３０１Ｃ Ｆ０１Ｎ 3/28 ３０１ ３０１Ｐ Ｂ０１Ｄ 53/36 １０２Ａ (72)発明者 高田 保夫 愛知県愛知郡長久手町大字長湫字横道41番 地の１ 株式会社豊田中央研究所内 (72)発明者 安喜 稔 徳島県徳島市川内町加賀須野463 大塚化 学株式会社徳島研究所内 (72)発明者 鈴江 正義 徳島県徳島市川内町加賀須野463 大塚化 学株式会社徳島研究所内 Ｆターム(参考） 3G091 AA18 BA11 BA14 BA39 CA18 FB10 GA01 GA05 GA06 GB01X GB04X GB05W GB06W GB07W GB09X GB10X GB17X 4D048 AA06 BA07X BA11X BA30X BA31X BA32X BA33X BA41X BB08 BB17 4G066 AA12B AA23B BA07 CA37 DA02 GA01 GA06 4G069 AA01 AA09 AA15 BA04A BA04B BA07A BA07B BC43A BC51A BC70A BC71A BC72A BC74A BC75A BC75B EA01X EA01Y EA03X EA03Y EC22X EC22Y FA02 FC04 ZA30B──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) B01J 32/00 ZAB B01J 35/02 B 35/02 F01N 3/28 301C F01N 3/28 301 301P B01D 53 / 36 102A (72) Inventor Yasuo Takada 41-Cho, Yokomichi, Nagakute-cho, Aichi-gun, Aichi Prefecture Inside Toyota Central Research Laboratory, Inc. (72) Inventor Minoru Aki Minoru 463 Kasuno, Kawauchi-cho, Tokushima City, Tokushima Prefecture Inside the Tokushima Laboratory Co., Ltd. (72) Inventor Masayoshi Suzue 463 Kagasuno, Kawauchi-machi, Tokushima City, Tokushima Prefecture Otsuka Chemical Co., Ltd.F-term in the Tokushima Research Laboratories (reference) GB10X GB17X 4D048 AA06 BA07X BA11X BA30X BA31X BA32X BA33X BA41X BB08 BB17 4G066 AA12B AA23B BA07 CA37 DA02 GA01 GA06 4G069 AA01 AA09 AA15 BA04A BA04B BA07A BA07B BC43A BC51A BC70A BC71A BC72A BC74A BC75A BC75B EA01X EA01Y EA03X EA03Y EC22X EC22Y FA02 FC04 ZA30B
Claims (6)
１〜50μｍの繊維状の単斜晶酸化チタン粉末を成形又は
担体基材にコ−ティングしたことを特徴とする排ガス浄
化用触媒担体。1. A catalyst carrier for purifying exhaust gas, wherein a fibrous monoclinic titanium oxide powder having an average fiber diameter of 0.1 to 1 μm and an average fiber length of 1 to 50 μm is molded or coated on a carrier substrate. .
１〜50μｍの繊維状の単斜晶酸化チタン粉末にゼオライ
ト粉末及び／又は酸素放出材粉末を混合した粉末を成形
又は担体基材にコ−ティングしたことを特徴とする排ガ
ス浄化用触媒担体。2. Molding or carrier base material by mixing fibrous monoclinic titanium oxide powder having an average fiber diameter of 0.1 to 1 μm and an average fiber length of 1 to 50 μm with zeolite powder and / or oxygen releasing material powder. An exhaust gas purifying catalyst carrier characterized by being coated.
セリアとジルコニアの固溶体粉末であることを特徴とす
る請求項２に記載の排ガス浄化用触媒担体。3. The exhaust gas purifying catalyst carrier according to claim 2, wherein the oxygen releasing material powder is ceria powder or a solid solution powder of ceria and zirconia.
体が、ディ−ゼルエンジン排ガス浄化用であることを特
徴とする排ガス浄化用触媒担体。4. A catalyst carrier for purifying exhaust gas, wherein the catalyst carrier according to claim 1 is for purifying diesel engine exhaust gas.
体に、Ｐｔ、Ｐｄ、Ｒｈ、Ｉｒ、Ｒｕ等から選ばれた少
なくとも１種の貴金属を担持させたことを特徴とする排
ガス浄化用触媒。5. Exhaust gas purification, wherein at least one noble metal selected from Pt, Pd, Rh, Ir, Ru and the like is carried on the catalyst carrier according to claim 1. Catalyst.
ンジン排ガス浄化用であることを特徴とする排ガス浄化
用触媒。6. The exhaust gas purifying catalyst according to claim 5, wherein the catalyst is used for purifying diesel engine exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25851499A JP2001079391A (en) | 1999-09-13 | 1999-09-13 | Catalyst carrier and catalyst for cleaning exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25851499A JP2001079391A (en) | 1999-09-13 | 1999-09-13 | Catalyst carrier and catalyst for cleaning exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001079391A true JP2001079391A (en) | 2001-03-27 |
Family
ID=17321277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25851499A Pending JP2001079391A (en) | 1999-09-13 | 1999-09-13 | Catalyst carrier and catalyst for cleaning exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001079391A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007130544A (en) * | 2005-11-09 | 2007-05-31 | Catalysts & Chem Ind Co Ltd | Honeycomb formed body and its manufacturing method |
| US7265076B2 (en) | 2002-12-26 | 2007-09-04 | Matsushita Electric Industrial Co, Ltd. | CO removal catalyst, method of producing CO removal catalyst, hydrogen purifying device and fuel cell system |
| JP2008117625A (en) * | 2006-11-02 | 2008-05-22 | National Institute Of Advanced Industrial & Technology | Lithium secondary battery active material, its manufacturing method, and lithium secondary battery using it |
| US7718143B2 (en) | 2003-01-10 | 2010-05-18 | Toyota Jidosha Kabushiki Kaisha | Filter catalyst for purifying exhaust gases |
| JP2010119994A (en) * | 2008-11-21 | 2010-06-03 | Mazda Motor Corp | Catalyst for cleaning exhaust |
-
1999
- 1999-09-13 JP JP25851499A patent/JP2001079391A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7265076B2 (en) | 2002-12-26 | 2007-09-04 | Matsushita Electric Industrial Co, Ltd. | CO removal catalyst, method of producing CO removal catalyst, hydrogen purifying device and fuel cell system |
| US7718143B2 (en) | 2003-01-10 | 2010-05-18 | Toyota Jidosha Kabushiki Kaisha | Filter catalyst for purifying exhaust gases |
| JP2007130544A (en) * | 2005-11-09 | 2007-05-31 | Catalysts & Chem Ind Co Ltd | Honeycomb formed body and its manufacturing method |
| JP2008117625A (en) * | 2006-11-02 | 2008-05-22 | National Institute Of Advanced Industrial & Technology | Lithium secondary battery active material, its manufacturing method, and lithium secondary battery using it |
| JP2010119994A (en) * | 2008-11-21 | 2010-06-03 | Mazda Motor Corp | Catalyst for cleaning exhaust |
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