JPS6025542A - Nox reducing method - Google Patents
Nox reducing methodInfo
- Publication number
- JPS6025542A JPS6025542A JP58133807A JP13380783A JPS6025542A JP S6025542 A JPS6025542 A JP S6025542A JP 58133807 A JP58133807 A JP 58133807A JP 13380783 A JP13380783 A JP 13380783A JP S6025542 A JPS6025542 A JP S6025542A
- Authority
- JP
- Japan
- Prior art keywords
- nox
- catalyst
- platinum
- supported
- platinum group
- 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
Landscapes
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ガス、石油燃焼器等の低Ｎ Ｏｘ化に関する
。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to reducing NOx in gas and oil combustors.
従来例の構成とその問題点
従来、Ｎ Ｏｘの低減化方法としては、燃焼ノクーナの
構造によるもの、自動車の三元触媒等にみられる触媒と
遷元剤による接触還元というものかあった。＠者におい
ては、完全にＮ Ｏｘを除去するこ七が困難であり、後
者の触媒による方法では、燃焼雰囲気を制御しなければ
ならないということや、触媒自身の耐熱性等の問題があ
った。Conventional Structures and Problems Conventionally, NOx reduction methods have been based on the structure of a combustion nocuna, or catalytic reduction using a catalyst and a transition agent, such as those found in three-way catalysts for automobiles. In the latter method, it was difficult to completely remove NOx, and in the latter method using a catalyst, there were problems such as the need to control the combustion atmosphere and the heat resistance of the catalyst itself.
発明の目的
本発明はこのような従来の問題点を解消するもので耐熱
性の優れた担持触媒を用いて、高温域でのＮ Ｏｘの接
触分解を図ることを目的としている。OBJECTS OF THE INVENTION The present invention solves these conventional problems and aims to achieve catalytic decomposition of NOx in a high temperature range by using a supported catalyst with excellent heat resistance.
発明の本１１１１成
この目的を達成するために本発明は、ペロブスカイト型
複合酸化物に白金族元素、及び遷移金属を担持した触媒
を不活性雰囲気、又は還元性雰囲気で８００〜１０００
℃付近でＮ Ｏｘを含む気体と接触させるものである。BACKGROUND OF THE INVENTION 1111 To achieve this object, the present invention provides a catalyst in which a platinum group element and a transition metal are supported on a perovskite type composite oxide in an inert atmosphere or a reducing atmosphere.
It is brought into contact with a gas containing NOx at around ℃.
本触媒では白金族元素、及び遷移金属がＮ Ｏｘを分解
するのに大きな効果をもち、ペロブスカイト型複合酸化
物は、耐熱性が優れておりＮＯｘ分解により生成される
酸素をその表向に吸着させ、白金族元素及び遷移金属の
酸素による被毒を防止することができる。In this catalyst, platinum group elements and transition metals have a great effect on decomposing NOx, and the perovskite-type composite oxide has excellent heat resistance and adsorbs oxygen produced by NOx decomposition on its surface. , it is possible to prevent platinum group elements and transition metals from being poisoned by oxygen.
実施例の説明
ペロブスカイト型複合酸化物は、一般式Ａ Ｂ ０３で
表わされ、ＡサイトはＬａ、Ｓｒ、ＢサイトはＦｅ、Ｃ
ｏ、Ｍｎ等を用いるのがよい。本発明では特にＡサイト
が５ｒＳＢサイトがＦｅの５ｒＦｅ０３という化合物が
適している。白金族元素としては、ロジウム、パラジウ
ム、白金等が考えられるが、本発明では白金が適してい
る。又、遷移金属としては、鉄、コバルト、ニッケル等
が考えられるが、本発明ではコバルト、ニッケルが適し
ている。Description of Examples The perovskite type composite oxide is represented by the general formula A B 03, where the A site is La, Sr, and the B site is Fe, C.
It is preferable to use O, Mn, etc. In the present invention, a compound called 5rFe03 in which the A site is 5rSB site is Fe is particularly suitable. As the platinum group element, rhodium, palladium, platinum, etc. can be considered, but platinum is suitable in the present invention. Further, as the transition metal, iron, cobalt, nickel, etc. can be considered, but cobalt and nickel are suitable in the present invention.
本触媒は５ｒＦｅ０３に白金を０．１重量パーセント以
上コバルトを０．１重量パーセント以−Ｌ担持させたも
のである。この触媒を８００〜１０００℃で、不活性雰
囲気又は還元性雰囲気でＮ Ｏｘ含有気体と接触させる
ことＫよりＮ Ｏｘの低減化を図ることができる。This catalyst has platinum supported on 5rFe03 in an amount of 0.1 weight percent or more and cobalt in an amount of 0.1 weight percent or more. By contacting this catalyst with a NOx-containing gas at 800 to 1000° C. in an inert atmosphere or a reducing atmosphere, NOx can be reduced more than K.
以下、上記の具体例について図を用いて説明する。Hereinafter, the above specific example will be explained using figures.
図において、１は木実施例による触媒、２は石英クール
、３は反応管、４はヒータである。この構成において、
Ｎ Ｏｘ含有気体は触媒と接触し、ＮＯｘの接触分解が
できる。第１表に本触媒の組成、第２表Ｋ Ｎ Ｏｘ分
解の例を示す。In the figure, 1 is a catalyst made of wood, 2 is a quartz cooler, 3 is a reaction tube, and 4 is a heater. In this configuration,
The NOx-containing gas is brought into contact with the catalyst, allowing catalytic decomposition of NOx. Table 1 shows the composition of this catalyst, and Table 2 shows an example of K N Ox decomposition.
第１表
第２表
これから本触媒がＮ Ｏｘの接触分解に有力であること
がわかる。From Table 1 and Table 2, it can be seen that this catalyst is effective in catalytic decomposition of NOx.
本触媒は粉末の状態ではあるが、使用する場所等により
、ハニカム状のものに担持させたり、金属基材等に結合
剤と共に膜状に塗布することも可能であり、比較的容易
に任意の形状にすることができる。又説明したように、
白金、コバルトの量はＳｒＦ、ｅ０３に対し０．１重量
パーセント程度であり、使用量が少量ですむ。This catalyst is in a powder state, but depending on the place of use, it can be supported on a honeycomb or coated with a binder on a metal substrate, etc., and can be applied to any desired method with relative ease. Can be shaped. Also, as explained,
The amount of platinum and cobalt is about 0.1% by weight based on SrF and e03, so the amount used can be small.
発明の効果
以上のように、本発明はペロゲスカイト型複合酸化物に
白金族元素及び遷移金属を担持した触媒をＮ Ｏｘを含
む気体と接触させる低ＮＯｘ化の方法であるが、
（１） ８００〜１０００℃の不活性、又は還元性雰囲
気でＮＯｘを分解できる。Effects of the Invention As described above, the present invention is a method for reducing NOx in which a catalyst in which a platinum group element and a transition metal are supported on a perogeskite complex oxide is brought into contact with a gas containing NOx. NOx can be decomposed in an inert or reducing atmosphere at 1000°C.
（２）触媒が耐熱性に優れているために、高温で低ＮＯ
ｘ化が図れる。(2) The catalyst has excellent heat resistance, resulting in low NO at high temperatures.
x-ization can be achieved.
（３）触媒が粉末であるだめ、゛使用時に任意の形状に
することが可能。(3) Since the catalyst is a powder, it can be shaped into any shape during use.
（４）白金族元素、遷移金属の担持量が少量ですむ。(4) The amount of platinum group elements and transition metals supported can be small.
図は本発明のＮ Ｏｘ低減化方法を用いた反応装置の要
部断面図である。
１・・・・・白金−コバルト担持５ｒＦｅ０３（触媒入
２・・・・・・石英クール、３・・・・・・反応管、４
・・・・・ヒータ。The figure is a sectional view of a main part of a reaction apparatus using the NOx reduction method of the present invention. 1...Platinum-cobalt supported 5rFe03 (with catalyst 2...Quartz cool, 3...Reaction tube, 4
·····heater.
Claims (2)
遷移金属を担持した触媒を、不活性雰囲気又は還元性雰
囲気で８００〜１０００℃付近で、ＮＯｘを含む気体と
接触させるＮＯｘ低減化方法。(1) A NOx reduction method in which a catalyst in which a platinum group element and a transition metal are supported on a perovskite-type composite oxide is brought into contact with a gas containing NOx at around 800 to 1000° C. in an inert atmosphere or a reducing atmosphere.
ｅ０３、白金族元素として白金、遷移金属としてコバ
ルトを用いた特許請求の範囲第１項記載のＮＯｘ低減化
方法。(2) Perovskite-type complex oxide S r F
e03, the NOx reduction method according to claim 1, using platinum as the platinum group element and cobalt as the transition metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58133807A JPS6025542A (en) | 1983-07-21 | 1983-07-21 | Nox reducing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58133807A JPS6025542A (en) | 1983-07-21 | 1983-07-21 | Nox reducing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6025542A true JPS6025542A (en) | 1985-02-08 |
Family
ID=15113491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58133807A Pending JPS6025542A (en) | 1983-07-21 | 1983-07-21 | Nox reducing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6025542A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7399729B2 (en) | 2003-12-22 | 2008-07-15 | General Electric Company | Catalyst system for the reduction of NOx |
| US20110076212A1 (en) * | 2008-10-03 | 2011-03-31 | Gm Global Technology Operations, Inc. | Methods and systems for oxidizing nitric oxide in a gas stream |
| CN107008291A (en) * | 2017-04-21 | 2017-08-04 | 北京国电龙源环保工程有限公司 | Catalyst for denitrating flue gas and preparation method thereof |
-
1983
- 1983-07-21 JP JP58133807A patent/JPS6025542A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7399729B2 (en) | 2003-12-22 | 2008-07-15 | General Electric Company | Catalyst system for the reduction of NOx |
| US20110076212A1 (en) * | 2008-10-03 | 2011-03-31 | Gm Global Technology Operations, Inc. | Methods and systems for oxidizing nitric oxide in a gas stream |
| US8377400B2 (en) * | 2008-10-03 | 2013-02-19 | GM Global Technology Operations LLC | Methods and systems for oxidizing nitric oxide in a gas stream |
| CN107008291A (en) * | 2017-04-21 | 2017-08-04 | 北京国电龙源环保工程有限公司 | Catalyst for denitrating flue gas and preparation method thereof |
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