JPH06102156B2 - Exhaust gas purification catalyst - Google Patents
Exhaust gas purification catalystInfo
- Publication number
- JPH06102156B2 JPH06102156B2 JP4278050A JP27805092A JPH06102156B2 JP H06102156 B2 JPH06102156 B2 JP H06102156B2 JP 4278050 A JP4278050 A JP 4278050A JP 27805092 A JP27805092 A JP 27805092A JP H06102156 B2 JPH06102156 B2 JP H06102156B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- copper
- catalyst
- oxide
- gas purification
- 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.)
- Expired - Lifetime
Links
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、排気ガス浄化用触媒に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying catalyst.
【０００２】[0002]
【従来の技術】従来公害防止用触媒は自動車排気ガス浄
化用や、固定発生源の排煙ガス脱硝用に多く使用されて
いる。上記の発生ガスの有害成分としては、窒素酸化物
（ＮＯ x）、一酸化炭素（ＣＯ）、炭化水素（ＨＣ）及
び硫黄酸化物（ＳＯx）等が挙げられる。これらの有害
ガスの浄化技術としては、窒素酸化物（ＮＯx）及び硫
黄酸化物（ＳＯx）の還元に有効なロジウム（Ｒｈ）、
一酸化炭素（ＣＯ）及び炭化水素（ＨＣ）の酸化に有効
な白金（Ｐｔ）、パラジウム（Ｐｄ）等を適当な担体に
担持して使用するものがある。またこれら個々の触媒を
２元、３元と組合せて複合触媒の形で利用する場合があ
る。2. Description of the Related Art Conventionally, pollution control catalysts are used for automobile exhaust gas purification.
It is often used for chemicals and for denitration of flue gas from fixed sources.
There is. Nitrogen oxides are harmful components of the above gas.
(NO x), Carbon monoxide (CO), hydrocarbons (HC) and
And sulfur oxide (SOx) And the like. These harmful
Nitrogen oxides (NOx) And sulfur
Yellow oxide (SOx) Effective rhodium (Rh) reduction,
Effective in oxidizing carbon monoxide (CO) and hydrocarbons (HC)
Platinum (Pt), palladium (Pd), etc. as a suitable carrier
There is one that is carried and used. Also these individual catalysts
It may be used in the form of a composite catalyst in combination with two-way and three-way.
It
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述の
ロジウム（Ｒｈ）、白金（Ｐｔ）及びパラジウム（Ｐ
ｄ）等の貴金属触媒は高価であり、また汎用されている
複合触媒は触媒寿命に問題があり、例えばパラジウム
（Ｐｄ）／ロジウム（Ｒｈ）触媒は使用中にロジウム
（Ｒｈ）表面をパラジウム（Ｐｄ）が遮蔽し、更に両者
が合金化して触媒としての機能が早期に減退する。担体
としてのアルミナ（Ａｌ2Ｏ3）粒子上に担持されたロジ
ウム（Ｒｈ）触媒は、担体のアルミナ（Ａｌ2Ｏ3）にロ
ジウム（Ｒｈ）が固溶化し、短時間の使用で失格化し易
いといわれている。また、触媒の構成には複数の有効成
分の各々に有利な多くの触媒層を多層形成する等の煩雑
な技術を必要とし触媒の製造は非能率的であるという問
題があった。However, the above-mentioned rhodium (Rh), platinum (Pt) and palladium (P
Noble metal catalysts such as d) are expensive, and commonly used composite catalysts have a problem in catalyst life. For example, a palladium (Pd) / rhodium (Rh) catalyst has palladium (Pd) on its surface during use. ) Shields, and both are alloyed, and the function as a catalyst declines early. A rhodium (Rh) catalyst supported on alumina (Al 2 O 3 ) particles as a carrier is likely to be disqualified in a short time when rhodium (Rh) is solid-solved in alumina (Al 2 O 3 ) as a carrier. It is said that. In addition, there is a problem that the catalyst is inefficient in production because it requires a complicated technique such as forming a multiplicity of catalyst layers advantageous for each of a plurality of active ingredients in a multilayer manner.
【０００４】本発明は、上述の実情に鑑み、窒素酸化物
（ＮＯx）、一酸化炭素（ＣＯ）及び炭化水素（ＨＣ）
はもとより有機塩素化合物等多くの有害成分を効率よく
除去できる排気ガス浄化用触媒を提供することを目的と
してなしたものである。In view of the above-mentioned circumstances, the present invention is directed to nitrogen oxides (NO x ), carbon monoxide (CO) and hydrocarbons (HC).
The object of the present invention is to provide an exhaust gas purifying catalyst that can efficiently remove many harmful components such as organic chlorine compounds.
【０００５】[0005]
【課題を解決するための手段】本発明は麦飯石に銅を含
有させた銅−麦飯石層を耐火性担体に担持させたもので
ある。According to the present invention, a refractory carrier is loaded with a copper-barley stone layer containing barley stone containing copper.
【０００６】本発明の排気ガス浄化用触媒に用いる麦飯
石の成分の一例を次に示す。An example of the components of barite stone used in the exhaust gas purifying catalyst of the present invention is shown below.
【０００７】[0007]
【表１】 [Table 1]
【０００８】上記の麦飯石は、長石成分の無水珪酸（Ｓ
ｉＯ2）、アルミナ（Ａｌ2Ｏ3）を含むおよそ２５，０
００種以上の多成分により構成され、海綿状の多孔性の
鉱物として産出される。The above-mentioned bakuhanseki is composed of silicic acid anhydride (S
iO 2 ), about 25.0 including alumina (Al 2 O 3 ).
It is composed of more than 00 kinds of multi-components and is produced as a spongy porous mineral.
【０００９】上記の長石成分はイオン交換する性質があ
り、銅（Ｃｕ）イオンを容易に導入することができる。
而して、麦飯石を懸濁させた水に酢酸銅（Ｃｕ（ＣＨ3
ＣＯＯ））あるいは硝酸銅（ＣｕＮＯ3）等の銅塩溶液
を加えて反応させる。次いで得られた生成物を乾燥後４
００〜８００℃で焼成し粉砕して５００メッシュ程度の
粉末にする。この粉末１００部をバインダーのアルミナ
ゲル５０部中に分散して耐火性のメタル担体上に塗布し
て触媒層の銅（Ｃｕ）−麦飯石層を形成する。猶、導入
した銅（Ｃｕ）分は酸化銅（ＣｕＯ）換算で１５％以下
が好ましい。酸化銅（ＣｕＯ）が１５％を超えると窒素
酸化物（ＮＯx）浄化率（％）は低下していく。The above-mentioned feldspar component has a property of ion exchange, and copper (Cu) ions can be easily introduced.
Thus, copper acetate (Cu (CH 3
COO)) or a copper salt solution such as copper nitrate (CuNO 3 ) is added and reacted. The product obtained is then dried 4
It is fired at 00 to 800 ° C. and pulverized into powder of about 500 mesh. 100 parts of this powder is dispersed in 50 parts of alumina gel as a binder and coated on a refractory metal carrier to form a copper (Cu) -barite stone layer of a catalyst layer. The amount of introduced copper (Cu) is preferably 15% or less in terms of copper oxide (CuO). If the copper oxide (CuO) exceeds 15%, the nitrogen oxide (NO x ) purification rate (%) decreases.
【００１０】本発明で使用する麦飯石中に含まれるアル
カリ成分の酸化ナトリウム（Ｎａ2Ｏ）、酸化カリウム
（Ｋ2Ｏ）等と置換し導入した酸化銅（ＣｕＯ）成分は
排気ガス中に含まれる窒素酸化物（ＮＯx）を効率的に
除去する。また、麦飯石に含まれる酸化マンガン（Ｍｎ
Ｏ）は銅（Ｃｕ）の導入によりホプカライト類似の酸化
銅（ＣｕＯ）、二酸化マンガン（ＭｎＯ2）の錯塩を形
成し、排気ガス中の一酸化炭素（ＣＯ）や炭化水素（Ｈ
Ｃ）を酸化して二酸化炭素（ＣＯ2）として除去する。
更に、麦飯石中の成分の無水珪酸（ＳｉＯ2）、酸化チ
タン（ＴｉＯ2）は有機塩素化物を塩化水素（ＨＣｌ）
＋二酸化炭素（ＣＯ2）に分解する等多くの機能を有
し、麦飯石のすぐれた吸着性能も含め排気ガス浄化作用
を有する。The copper oxide (CuO) component introduced by substituting the alkaline components such as sodium oxide (Na 2 O) and potassium oxide (K 2 O) contained in the barley stone used in the present invention is contained in the exhaust gas. The nitrogen oxides (NO x ) that are generated are efficiently removed. In addition, manganese oxide (Mn contained in barley stone)
O) forms a complex salt of copper oxide (CuO) and manganese dioxide (MnO 2 ) similar to hopcalite by introducing copper (Cu), and carbon monoxide (CO) or hydrocarbons (H) in exhaust gas are formed.
C) is oxidized and removed as carbon dioxide (CO 2 ).
Further, silicic acid anhydride (SiO 2 ) and titanium oxide (TiO 2 ) which are the components in the barite are converted to organic chlorides with hydrogen chloride (HCl).
+ Has many functions such as decomposing into carbon dioxide (CO 2 ), and has an exhaust gas purification function including excellent adsorption performance of barley stone.
【００１１】[0011]
実施例１ 耐火性担体としてメタル担体にステンレス鋼を用い、酸
化銅（ＣｕＯ）を所定量含有させた銅（Ｃｕ）−麦飯石
層を形成した触媒層を設ける。この触媒層に流入温度８
００℃のエンジンからの排気ガスを通過させ窒素酸化物
（ＮＯx）、一酸化炭素（ＣＯ）及び炭化水素（ＨＣ）
など有害ガスの浄化率（％）を測定した。Example 1 As a refractory carrier, stainless steel was used as a metal carrier, and a catalyst layer having a copper (Cu) -barite stone layer containing a predetermined amount of copper oxide (CuO) was provided. Inflow temperature of 8 to this catalyst layer
Passes exhaust gas from an engine at 00 ° C to pass nitrogen oxides (NO x ), carbon monoxide (CO) and hydrocarbons (HC)
The purification rate (%) of harmful gas was measured.
【００１２】[0012]
【表２】 この際の空燃比Ａ／Ｆ＝２０（Ａは空気流量、Ｆは燃料
流量）、空間速度ＳＶ＝３０００ｈ-1、耐久時間１００
時間[Table 2] At this time, the air-fuel ratio A / F = 20 (A is the air flow rate, F is the fuel flow rate), the space velocity SV = 3000 h −1 , and the durability time is 100.
time
【００１３】表２にて明らかなように窒素酸化物（ＮＯ
x）浄化率（％）は銅（Ｃｕ）−麦飯石中の酸化銅（Ｃ
ｕＯ）含有量６．５％が好ましく、他の排気ガス成分の
一酸化炭素（ＣＯ）と炭化水素（ＨＣ）浄化率（％）に
関しても良好な結果を示している。As is clear from Table 2, nitrogen oxides (NO
x ) Purification rate (%) is copper (Cu) -copper oxide (C
A uO) content of 6.5% is preferable, and good results are shown with respect to carbon monoxide (CO) and hydrocarbon (HC) purification rates (%) of other exhaust gas components.
【００１４】実施例２ 酸化銅（ＣｕＯ）含有量（％）の上記実施例（Ｉ）の触
媒層に流入温度６５０℃のジクロロエタン蒸気を通過さ
せ、分解した塩化水素（ＨＣｌ）の収率（％）を次に示
す。Example 2 Dichloroethane vapor having an inflow temperature of 650 ° C. was passed through the catalyst layer of the above-mentioned Example (I) having a copper oxide (CuO) content (%), and the yield (%) of hydrogen chloride (HCl) decomposed. ) Is shown below.
【００１５】比較例にはアルカリの酸化カルシウム（Ｃ
ａＯ）層に該蒸気を通過させた。In the comparative example, alkaline calcium oxide (C
The vapor was passed through the aO) layer.
【００１６】[0016]
【表３】 [Table 3]
【００１７】表３により本発明の実施例の触媒層（Ｉ）
が一般に利用されているアルカリに比べて格別に優れた
効果を示している。According to Table 3, the catalyst layer (I) of the embodiment of the present invention
Shows a particularly excellent effect as compared with the commonly used alkali.
【００１８】[0018]
【発明の効果】麦石飯に銅（Ｃｕ）を含有させた銅（Ｃ
ｕ）−麦飯石層を耐火性担体に担持させた触媒は排気ガ
ス中に含まれる有害物質である窒素酸化物（ＮＯx）、
一酸化炭素（ＣＯ）、炭化水素（ＨＣ）及び有機ハロゲ
ン化物の除去に極めて有効である。[Effects of the Invention] Copper (C) containing copper (Cu) in barley rice
u) -a catalyst in which a bourneishi layer is supported on a refractory carrier is a nitrogen oxide (NO x ) which is a harmful substance contained in exhaust gas,
It is extremely effective in removing carbon monoxide (CO), hydrocarbons (HC) and organic halides.
Claims (1)
耐火性担体に担持させたことを特徴とする排気ガス浄化
用触媒。1. A catalyst for purifying exhaust gas, comprising a refractory carrier carrying a copper-barley stone layer in which barley stone contains copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4278050A JPH06102156B2 (en) | 1992-09-22 | 1992-09-22 | Exhaust gas purification catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4278050A JPH06102156B2 (en) | 1992-09-22 | 1992-09-22 | Exhaust gas purification catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0699067A JPH0699067A (en) | 1994-04-12 |
| JPH06102156B2 true JPH06102156B2 (en) | 1994-12-14 |
Family
ID=17591960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4278050A Expired - Lifetime JPH06102156B2 (en) | 1992-09-22 | 1992-09-22 | Exhaust gas purification catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06102156B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8765085B2 (en) | 2012-04-26 | 2014-07-01 | Basf Corporation | Base metal catalyst and method of using same |
| US8668890B2 (en) | 2012-04-26 | 2014-03-11 | Basf Corporation | Base metal catalyst composition and methods of treating exhaust from a motorcycle |
-
1992
- 1992-09-22 JP JP4278050A patent/JPH06102156B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0699067A (en) | 1994-04-12 |
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