JPH02157047A - Combustion gas cleanup catalyst - Google Patents
Combustion gas cleanup catalystInfo
- Publication number
- JPH02157047A JPH02157047A JP63312299A JP31229988A JPH02157047A JP H02157047 A JPH02157047 A JP H02157047A JP 63312299 A JP63312299 A JP 63312299A JP 31229988 A JP31229988 A JP 31229988A JP H02157047 A JPH02157047 A JP H02157047A
- Authority
- JP
- Japan
- Prior art keywords
- catalyst
- combustion gas
- coating layer
- hollow cylindrical
- metal
- 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.)
- Granted
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 57
- 239000000567 combustion gas Substances 0.000 title claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims abstract description 66
- 239000002184 metal Substances 0.000 claims abstract description 66
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 31
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000011888 foil Substances 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 18
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 9
- 239000011651 chromium Substances 0.000 claims abstract description 9
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 239000011247 coating layer Substances 0.000 claims description 31
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 5
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 5
- 238000007751 thermal spraying Methods 0.000 claims 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052697 platinum Inorganic materials 0.000 abstract description 9
- 229910052763 palladium Inorganic materials 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 abstract 2
- 238000005452 bending Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 20
- 239000003350 kerosene Substances 0.000 description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 14
- 229910002091 carbon monoxide Inorganic materials 0.000 description 14
- 230000005855 radiation Effects 0.000 description 14
- 239000000203 mixture Substances 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 7
- 229930195733 hydrocarbon Natural products 0.000 description 7
- 150000002430 hydrocarbons Chemical class 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 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 4
- -1 nonoradium Chemical compound 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 229910001593 boehmite Inorganic materials 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000007602 hot air drying Methods 0.000 description 3
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- SONJTKJMTWTJCT-UHFFFAOYSA-K rhodium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Rh+3] SONJTKJMTWTJCT-UHFFFAOYSA-K 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- 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 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 239000011214 refractory ceramic Substances 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、石油ストーブの燃焼ガスなどの民生用あるい
は産業用の各種燃焼排ガスの浄化用に用いる触媒に関す
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a catalyst used for purifying various types of combustion exhaust gas for civilian or industrial use, such as combustion gas from kerosene stoves.
従来の技術
従来の排ガス浄化用触媒は、特開昭６１−２３４９３５
号公報に開示されているように耐火性セラミックス例え
ば、コーディエライト、アルミナ、ムライト、スボデュ
メンのハニカム状基祠に、ウオ、ソシュコトと呼ばれる
ガンマアルミナ等の被覆層を形成することにより比表面
積を通常１０〜３０ｍ２／ｇに増大させ、これに触媒金
属、例えば白金、ロジウム、ノ々ラジウム、ルテニウム
等を担持して調製しても）た。Conventional technology A conventional catalyst for purifying exhaust gas is disclosed in Japanese Patent Application Laid-Open No. 61-234935.
As disclosed in the above publication, the specific surface area can be increased by forming a coating layer of gamma alumina, etc. called wo or soshkot on a honeycomb-shaped base of refractory ceramics such as cordierite, alumina, mullite, and subodumen. 10 to 30 m2/g, and a catalytic metal such as platinum, rhodium, nonoradium, ruthenium, etc. was supported thereon).
発明が解決しようとする課題
上記の材料ではハニカム基材を触媒担体に用℃）るには
次のような課題がある。Problems to be Solved by the Invention With the above-mentioned materials, there are the following problems when using a honeycomb base material as a catalyst carrier.
（ａ）従来のコーディエライト、アルミナ、ムライト、
スボデュメンからなる基材を湾曲させることが製造上極
めて困難である。(a) Conventional cordierite, alumina, mullite,
It is extremely difficult in manufacturing to curve a base material made of subodumene.
（ｂ）ハニカム基材の熱伝導率が小さい。(b) The thermal conductivity of the honeycomb base material is low.
（Ｃ）ハニカムの目が細かくなるに従い被覆層の形成が
困難となる。(C) As the honeycomb mesh becomes finer, it becomes difficult to form a coating layer.
本発明は上記問題点に鑑み、加工性に優れた、また熱伝
導率の大きな金属ノ＼ニカム触媒を提供することを目的
とする。In view of the above problems, an object of the present invention is to provide a metal nicomb catalyst which has excellent processability and high thermal conductivity.
課題を解決するための手段
上記の目的を達成するため、請求項１の発明は中空円筒
状金属ハニカム体に白金族金属を含んだ活性アルミナか
らなる被覆層を形成したことを特徴とする請求項２の発
明は、中空円筒形で貫通孔のある金属箔体に白金族金属
を含んだ活性アルミナからなる被覆層を形成したことを
特徴とする請求項４の発明は中空円筒形でスリットのあ
る金属箔体に白金族金属を含んだ活性アルミナからなる
被覆層を形成したことを特徴とする。Means for Solving the Problems In order to achieve the above object, the invention of claim 1 is characterized in that a coating layer made of activated alumina containing a platinum group metal is formed on a hollow cylindrical metal honeycomb body. The invention according to claim 2 is characterized in that a coating layer made of activated alumina containing a platinum group metal is formed on a metal foil body having a hollow cylindrical shape and having through holes. It is characterized in that a coating layer made of activated alumina containing a platinum group metal is formed on the metal foil body.
作用
本発明によれば、中空円筒形金属ハニカムあるいは金属
箔はその基材が金属であることから湾曲等成形か容易て
しかも熱伝導率が大きく、その表面への白金族金属を含
んだ活性アルミナ被覆層の形成が容易となる。したがっ
て、燃焼ガス浄化用として加工性にすぐれ、浄化効率の
きわめて良い触媒が得られる。According to the present invention, since the hollow cylindrical metal honeycomb or metal foil is made of metal, it is easy to form into curves, etc., and has high thermal conductivity. Formation of the coating layer becomes easy. Therefore, a catalyst with excellent processability and extremely high purification efficiency can be obtained for combustion gas purification.
実施例 以下、本発明の詳細な説明する。Example The present invention will be explained in detail below.
〈第１実施例〉
厚みが３ ｍ ＩＴｈ セル数が２００セル／インチ
の第１図に示すような取り付は金具２のついた直径１５
０ｍｍの中空円筒状金属ハニカム体１に以下に示す方法
で白金とパラジウムを含んだ活性アルミナ被覆層を形成
した。金属ハニカム体に用いた金属は鉄、クロム、アル
ミニウムがそれぞれ８５．１０．５ｗｔ％から成るステ
ンレス鋼である。活性アルミナ（比表面積２００ｍ２／
ｇＮ 粒径３００ミクロン以下が９９％）と市販のベ
ーマイトからなるバインダーとが９０対１０の重量比で
、また白金族金属として塩化白金酸と塩化ロジウムがハ
ニカム触媒体積当りそれぞれ３０ｍｇ／リットルと１５
ｍｇ／リットル含まれるように混合し、比重１．５０の
水溶液スラリーとした。金属ハニカム基材を上記スラリ
に浸漬、乾燥し被覆層を形成する。さらに１５０℃の温
度で３０分間熱風乾燥を行い、被覆層と基体との接着強
度を高めるため５００°Ｃで１時間焼成する。〈First Example〉 The thickness is 3 m and the number of ITh cells is 200 cells/inch as shown in Fig. 1.
An activated alumina coating layer containing platinum and palladium was formed on a 0 mm hollow cylindrical metal honeycomb body 1 by the method shown below. The metal used for the metal honeycomb body is stainless steel containing 85.10.5 wt% of iron, chromium, and aluminum, respectively. Activated alumina (specific surface area 200m2/
gN (99% particle size less than 300 microns) and a binder consisting of commercially available boehmite in a weight ratio of 90:10, and platinum group metals chloroplatinic acid and rhodium chloride at 30 mg/liter and 15 mg/liter, respectively, per honeycomb catalyst volume.
The mixture was mixed so as to contain mg/liter to form an aqueous slurry with a specific gravity of 1.50. A metal honeycomb base material is immersed in the slurry and dried to form a coating layer. Further, hot air drying is performed at a temperature of 150° C. for 30 minutes, and baking is performed at 500° C. for 1 hour to increase the adhesive strength between the coating layer and the substrate.
以上の工程を２回繰り返すことによりセラミックハニカ
ム基体に厚み１００ミクロン、付着量８０ｇ被覆層／１
リットル担体、形成した。By repeating the above process twice, the ceramic honeycomb substrate was coated with a thickness of 100 microns and a coating weight of 80 g/1.
liter carrier, formed.
本実施例の中空円筒形金属ハニカム触媒６を第７図に示
すように石油ストーブ（燃焼筒７）に取り付はストーブ
の天板の上方２ｃｍのガス組成を測定し、その測定結果
を第１表に示す。測定したガスは一酸化炭素、炭化水素
と一酸化炭素窒素である。As shown in FIG. 7, the hollow cylindrical metal honeycomb catalyst 6 of this embodiment was installed in a kerosene stove (combustion cylinder 7), and the gas composition was measured 2 cm above the top plate of the stove. Shown in the table. The gases measured were carbon monoxide, hydrocarbons and carbon monoxide and nitrogen.
一方、比較例とし本発明の触媒を取り付けていない石油
ストーブの前記と同様な場所におけるガス組成を同じく
第１表に示す。第１表に示す結果より明らかなように、
本発明の触媒を用いるとクリーンな燃焼を行うことがで
きる。さらに本発明の触媒による熱の輻射（遠赤外線放
射）があるため従来品より暖かかった。On the other hand, Table 1 also shows the gas composition at the same location as above in a comparative example of an kerosene stove in which the catalyst of the present invention was not installed. As is clear from the results shown in Table 1,
Clean combustion can be achieved using the catalyst of the present invention. Furthermore, because of the heat radiation (far-infrared radiation) caused by the catalyst of the present invention, it was warmer than conventional products.
第１表
〈第２実施例〉
第２図に示すような取り付は金具２のついた厚みが１
ｍ ｆＴｈ 直径２ｍｍの貫通孔３を有する直径１５
０ｍｍの中空円筒状の金属箔４に第１実施例と同様な方
法で同量の白金とパラジウムを含んた活性アルミナ被覆
層を形成した。用いた金属は鉄、クロム、アルミニウム
がそれぞれ８５．１０．５ｗｔ％から成るステンレス鋼
である。Table 1 (Second Example) For installation as shown in Figure 2, the thickness of the metal fitting 2 is 1
m fTh Diameter 15 with through hole 3 having a diameter of 2 mm
An activated alumina coating layer containing the same amounts of platinum and palladium was formed on a hollow cylindrical metal foil 4 of 0 mm in the same manner as in the first example. The metal used was stainless steel containing 85.10.5 wt% of iron, chromium, and aluminum, respectively.
本実施例の中空円筒形金属ハニカム触媒を第７図に示す
ように石油ストーブに取り付はストーブの天板の上方２
ｃｍのガス組成を測定しその測定結果を第２表に示す。The hollow cylindrical metal honeycomb catalyst of this example was attached to the kerosene stove at the upper part of the top plate of the stove as shown in Fig. 7.
The gas composition of cm was measured and the measurement results are shown in Table 2.
測定したガスは一酸化炭素、炭化水素と一酸化炭素窒素
である。The gases measured were carbon monoxide, hydrocarbons and carbon monoxide and nitrogen.
比較例とし本発明の触媒を取り付けていない石油ストー
ブの前記と同様な場所におけるガス組成を同じく第２表
に示す。第２表に示す結果より明らかなように本発明の
触媒を用いるとクリーンな燃焼を行うことができる。さ
らに本発明の触媒による熱の輻射（遠赤外線放射）があ
るため従来品より暖かかった。Table 2 also shows the gas composition at the same location as described above in a kerosene stove as a comparative example in which the catalyst of the present invention was not installed. As is clear from the results shown in Table 2, clean combustion can be achieved using the catalyst of the present invention. Furthermore, it was warmer than conventional products because of the heat radiation (far-infrared radiation) caused by the catalyst of the present invention.
第２表
く第３実施例〉
第３図に示すように厚みが１ ｍ ＩＴｈ 貫通孔３
の直径が燃焼炎から離れるにつれ２ｍｍから８ｍｍへと
しだいに大きくなっている金属箔に第１実施例と同様な
方法で同量の白金とパラジウムを含んだ活性アルミナ被
覆層を形成した。用いた金属は鉄、クロム、アルミニウ
ムがそれぞれ８５．１０．５ｗｔ％から成るステンレス
鋼である。Third embodiment shown in Table 2> As shown in Fig. 3, the thickness is 1 m ITh through hole 3
An activated alumina coating layer containing the same amount of platinum and palladium was formed on the metal foil, whose diameter gradually increases from 2 mm to 8 mm as it moves away from the combustion flame, in the same manner as in the first example. The metal used was stainless steel containing 85.10.5 wt% of iron, chromium, and aluminum, respectively.
本実施例の中空円筒形金属ハニカム触媒を第７図に示し
たように石油ストーブに取り付はストーブの天板の上方
２ｃｍのガス組成を測定し、その測定結果を第３表に示
す。測定したガスは一酸化炭素、炭化水素と一酸化炭素
窒素である。The hollow cylindrical metal honeycomb catalyst of this example was attached to a kerosene stove as shown in FIG. 7, and the gas composition was measured 2 cm above the top of the stove. The measurement results are shown in Table 3. The gases measured were carbon monoxide, hydrocarbons and carbon monoxide and nitrogen.
一方、比較例とし本発明の触媒を取り付けていない石油
ストーブの前記と同様な場所におけるガス組成を同じ（
第３表に示す。第３表に示す結果より明らかなように、
本発明の触媒を用いるとクリーンな燃焼を行うことがで
きる。さらに本発明の触媒による熱の輻射（遠赤外線放
射）があるため従来品より暖かかった。On the other hand, as a comparative example, the gas composition at the same location as above of a kerosene stove without the catalyst of the present invention was
It is shown in Table 3. As is clear from the results shown in Table 3,
Clean combustion can be achieved using the catalyst of the present invention. Furthermore, it was warmer than conventional products because of the heat radiation (far-infrared radiation) caused by the catalyst of the present invention.
第３表
〈第４実施例〉
第４図に示すように取り付は金具２のついた厚みが１ｍ
ｒｒｈ 幅２ ｍ ｒｒｈ 長さ５０ｍｍのスリッ
ト５を有する金属箔に第１実施例と同様な方法で同量の
白金とパラジウムを含んだ活性アルミナ被覆層を形成し
た。用いた金属は鉄、クロム、アルミニウムがそれぞれ
８５．１０１５ｗｔ％から成るステンレス鋼である。Table 3 (Fourth Example) As shown in Figure 4, the thickness of the metal fitting 2 is 1 m.
An activated alumina coating layer containing the same amount of platinum and palladium was formed on a metal foil having a slit 5 having a width of 2 m and a length of 50 mm in the same manner as in the first example. The metal used was stainless steel containing 85.1015 wt% of each of iron, chromium, and aluminum.
本実施例の中空円筒形金属ハニカム触媒を第７図に示す
ように石油ストーブに取り付はストーブの天板の」三方
２ｃｍのガス組成を測定し第４表に示す。測定したガス
は一酸化炭素、炭化水素と一酸化炭素窒素である。The hollow cylindrical metal honeycomb catalyst of this example was attached to a kerosene stove as shown in FIG. 7, and the gas composition was measured at 2 cm on each side of the top plate of the stove, and the results are shown in Table 4. The gases measured were carbon monoxide, hydrocarbons and carbon monoxide and nitrogen.
一方、比較例とし本発明の触媒を取り付けていない石油
ストーブの前記と同様な場所におけるガス組成を同じく
第４表に示す。第４表に示す結果より明らかなように本
発明の触媒を用いるとクリーンな燃焼を行うことができ
る。さらに本発明の触媒による熱の輻射（遠赤外線放射
）があるため従来品より暖かかった。On the other hand, Table 4 also shows the gas composition at the same location as described above in a kerosene stove as a comparative example in which the catalyst of the present invention was not installed. As is clear from the results shown in Table 4, clean combustion can be achieved using the catalyst of the present invention. Furthermore, because of the heat radiation (far-infrared radiation) caused by the catalyst of the present invention, it was warmer than conventional products.
第４表
く第５実施例〉
第１．２実施例と同様な中空円筒状金属ハニカム体ある
いは箔に以下に示す方法で白金とパラジウムを含んだ活
性アルミナ被覆層を形成した。本実施例では活性アルミ
ナに酸化セリウムを加えた。Fifth Example in Table 4> An activated alumina coating layer containing platinum and palladium was formed on a hollow cylindrical metal honeycomb body or foil similar to Example 1.2 by the method shown below. In this example, cerium oxide was added to activated alumina.
用いた金属は鉄、クロム、アルミニウムがそれぞれ８５
．１０．５ｗｔ％から成るステンレス鋼である。The metals used were iron, chromium, and aluminum with 85% each.
．． It is a stainless steel consisting of 10.5 wt%.
活性アルミナ（比表面積２００ｍ２／ ｇｌ 粒径３
００ミクロン以下が９９％）と硝酸セリウムとを混合、
１０００°Ｃで焼成するアルミナと酸化セリウムとが重
量比で５対１で構成されている粉末を得た。この粉末と
市販のベーマイトからなるバインダーとが９０対１０の
重量比で、また白金族金属として塩化白金酸と塩化ロジ
ウムがハニカム触媒体積当りそれぞれ３０ｍｇ／リット
ルと１５ｍｇ／リットル含まれるように混合し、比重１
．５０の水溶液スラリーとした。金属ハニカム基材を上
記スラリーに浸漬、乾燥し被覆層を形成する。さらに＋
５０°Ｃの温度で３０分間熱風乾燥を行い、被覆層と基
体との接着強度を高めるため５００°Ｃで１時間焼成す
る。Activated alumina (specific surface area 200m2/gl particle size 3
00 microns or less) and cerium nitrate,
A powder composed of alumina and cerium oxide in a weight ratio of 5:1 was obtained which was fired at 1000°C. This powder and a binder made of commercially available boehmite are mixed in a weight ratio of 90:10, and chloroplatinic acid and rhodium chloride as platinum group metals are mixed in an amount of 30 mg/liter and 15 mg/liter, respectively, per honeycomb catalyst volume, Specific gravity 1
．． 50 was made into an aqueous slurry. A metal honeycomb substrate is immersed in the slurry and dried to form a coating layer. Further +
Hot air drying is performed at a temperature of 50°C for 30 minutes, and baking is performed at 500°C for 1 hour to increase the adhesive strength between the coating layer and the substrate.
以上の工程を２回繰り返すことによりセラミックハニカ
ム基体に厚み１００ミクロン、付着ｆｔ８０ｇ被覆層／
１リットル担体、形成した。By repeating the above process twice, the ceramic honeycomb substrate was coated with a coating layer of 100 microns thick and an attached 80 g coating layer.
A 1 liter carrier was formed.
本実施例の中空円筒形金属ハニカム触媒Ａあるいは中空
円筒形金属箔触媒Ｂを第７図に示すように石油ストーブ
に取り付はストーブの天板の」１方２ｃｍのガス組成を
測定し、その測定結果を第５表に示す。測定したガスは
一酸化炭素、炭化水素と一酸化炭素窒素である。The hollow cylindrical metal honeycomb catalyst A or the hollow cylindrical metal foil catalyst B of this example was attached to a kerosene stove as shown in FIG. The measurement results are shown in Table 5. The gases measured were carbon monoxide, hydrocarbons and carbon monoxide and nitrogen.
一方、比較例とし本発明の触媒Ａ、 Ｂを取り付けて
いない石油ストーブの前記と同様な場所におけるガス組
同じく第５表に示す。第５表に示す測定結果より明らか
なように、本発明の触媒を用いるとクリーンな燃焼を行
うことができる。さらに本発明の触媒による熱の輻射（
遠赤外線放射）があるため従来品より暖かかった。また
本実施例の触媒は実施例１．２のものに比べ８００°Ｃ
以上での高温耐熱性に優れ触媒寿命も３０％以上良好で
あった。On the other hand, as a comparative example, the gas set of a kerosene stove in which catalysts A and B of the present invention were not installed at the same location as above is also shown in Table 5. As is clear from the measurement results shown in Table 5, clean combustion can be achieved using the catalyst of the present invention. Furthermore, heat radiation (
It was warmer than conventional products because of the far infrared radiation. Moreover, the catalyst of this example was heated at 800°C compared to that of Example 1.2.
It was excellent in high temperature heat resistance and the catalyst life was also good by 30% or more.
第５表
〈第６実施例〉
実施例２．３の貫通孔あるいはスリットを有する直径１
５０ｍｍの中空円筒状の金属箔を第５図、第６図に示す
ように波状に加工した担体に第１実施例と同様な方法で
同量の白金とパラジウムを含んだ活性アルミナ被覆層を
形成した。用いた金属は鉄、クロム、アルミニウムがそ
れぞれ８５．１０．５ｗｔ％から成るステンレス鋼であ
る。Table 5 (Sixth Example) Diameter 1 with through hole or slit of Example 2.3
An activated alumina coating layer containing the same amount of platinum and palladium was formed on a carrier made by processing a 50 mm hollow cylindrical metal foil into a corrugated shape as shown in FIGS. 5 and 6 in the same manner as in the first example. did. The metal used was stainless steel containing 85.10.5 wt% of iron, chromium, and aluminum, respectively.
本実施例の中空円筒形金属ハニカム触媒Ａ（貫通孔）、
Ｂ（スリット）を第７図に示すように石油ストーブに取
り付はストーブの天板の上方２ｃｍのガス組成を測定し
第６表に示す。測定したガスは一酸化炭素、炭化水素と
一酸化炭素窒素である。Hollow cylindrical metal honeycomb catalyst A (through holes) of this example,
When B (slit) was attached to a kerosene stove as shown in FIG. 7, the gas composition was measured 2 cm above the top of the stove and is shown in Table 6. The gases measured were carbon monoxide, hydrocarbons and carbon monoxide and nitrogen.
一方、比較例とし本発明の触媒を取り付けていない石油
ストーブの前記と同様な場所におけるガス組成を同じく
第６表に示す。第６表に示す測定結果より明らかなよう
に、本発明の触媒を用いると実施例２．３に示したもの
より燃焼ガスとの接触面積が増大しさらにクリーンな燃
焼を行うことができる。また本発明の触媒による熱の輻
射（遠赤外線放射）効果も大き〈従来品より暖かかった
。On the other hand, Table 6 also shows the gas composition at the same location as above in a kerosene stove as a comparative example in which the catalyst of the present invention was not installed. As is clear from the measurement results shown in Table 6, when the catalyst of the present invention is used, the contact area with combustion gas is increased compared to that shown in Example 2.3, and cleaner combustion can be performed. In addition, the heat radiation (far-infrared radiation) effect of the catalyst of the present invention is large (warmer than conventional products).
第６表
く第７実施例〉
第１．２実施例と同様な中空円筒状金属ハニカム体ある
いは箔に以下に示す方法で白金とパラジウムを含んだ活
性アルミナ被覆層を形成した。本実施例では活性アルミ
ナに酸化セリウムを加えた。Seventh Example in Table 6> An activated alumina coating layer containing platinum and palladium was formed on a hollow cylindrical metal honeycomb body or foil similar to Example 1.2 by the method shown below. In this example, cerium oxide was added to activated alumina.
用いた金属は鉄、クロム、アルミニウムがそれぞれ８５
．１０１５ｗｔ％から成るステンレス鋼である。The metals used were iron, chromium, and aluminum with 85% each.
．． It is stainless steel consisting of 1015wt%.
まずプラズマ溶射法を用い金属担体表面に第１被覆層で
あるアルミナ層を１０ミクロン形成した。First, an alumina layer of 10 microns as a first coating layer was formed on the surface of a metal carrier using a plasma spraying method.
その後は第５実施例と同様な方法で第２被覆層を形成し
た。すなわち活性アルミナ（比表面積２００ ｍ ２／
ｇ １ 粒径３００ミクロン以下が９９％）と硝酸
セリウムとを混合、１ｏｏｏ°Ｃで焼成するアルミナと
酸化セリウムとが重量比で５ 刻１で構成されている粉
末を得た。この粉末と市販のベーマイトからなるバイン
ダーとか９０対１０の重量比で、また白金族金属として
塩化白金酸と塩化ロジウムがハニカム触媒体積当りそれ
ぞれ３０ｍｇ／リットルと１５ｍｇ／リットル含まれる
ように混合し、比重１．５０の水溶液スラリーとした。Thereafter, a second coating layer was formed in the same manner as in the fifth example. That is, activated alumina (specific surface area 200 m2/
g1 (99% having a particle size of 300 microns or less) was mixed with cerium nitrate and fired at 100°C to obtain a powder composed of alumina and cerium oxide in a weight ratio of 5:1. This powder and a binder made of commercially available boehmite were mixed at a weight ratio of 90:10, and platinum group metals such as chloroplatinic acid and rhodium chloride were mixed at a concentration of 30 mg/liter and 15 mg/liter, respectively, per honeycomb catalyst volume. It was made into an aqueous slurry of 1.50.
金属ハニカム基材を上記スラリーに浸漬、乾燥し被覆層
を形成する。さらに１５０’Ｃの温度で３０分間熱風乾
燥を行い、被覆層と基体との接着強度を高めるため５０
０℃で１時間焼成する。以」二の工程を２回繰り返すこ
とによりセラミックハニカム基体に厚み１００ミクロン
、付着！８０ｇ被覆層／１リッ）・ル担体、形成した。A metal honeycomb substrate is immersed in the slurry and dried to form a coating layer. Further, hot air drying was performed at a temperature of 150'C for 30 minutes, and the
Bake at 0°C for 1 hour. By repeating step 2 twice, a thickness of 100 microns is adhered to the ceramic honeycomb substrate! 80 g coating layer/1 liter carrier was formed.
本実施例の中空円筒形金属ハニカム触媒Ａあるいは中空
円筒形金属箔触媒Ｂを第７図に示すように石油ス）・−
ブに取りイ」けスト−ブの天板の」１方２ｃｍのカス組
成を測定し第７表に示す。測定したカスは一酸化炭素、
炭化水素と一酸化炭素窒素である。The hollow cylindrical metal honeycomb catalyst A or the hollow cylindrical metal foil catalyst B of this example is shown in FIG.
The residue composition of 2 cm on each side of the top plate of the stove was measured and shown in Table 7. The measured residue is carbon monoxide,
These are hydrocarbons and carbon monoxide and nitrogen.
一方、比較例とし本発明の触媒を取り付けていない石油
ストーブの前記と同様な場所におけるガス組成を同じく
第７表に示す。第７表に示す測定結果より明らかなよう
に、本発明の触媒を用いるとクリーンな燃焼を行うこと
ができる。さらに本発明の触媒による熱の輻射（遠赤外
線放射）があるため従来品より暖かかった。また本実施
例の触媒はアルミナの被覆層が極めて強固に金属担体に
接着しており第５実施例に比べさらに８００ ’Ｃ以」
二での高温耐熱性に優れ触媒寿命も良好であった。On the other hand, Table 7 also shows the gas composition at the same location as above in a kerosene stove as a comparative example in which the catalyst of the present invention was not installed. As is clear from the measurement results shown in Table 7, clean combustion can be achieved using the catalyst of the present invention. Furthermore, because of the heat radiation (far-infrared radiation) caused by the catalyst of the present invention, it was warmer than conventional products. In addition, the alumina coating layer of the catalyst of this example adheres extremely firmly to the metal carrier, and the temperature is even higher than that of 80'C compared to the fifth example.
It had excellent high-temperature heat resistance and a good catalyst life.
第７表
Ｇ−
発明の効果
以」二のように、本発明によれば金属ノへ二カム担体あ
るいは金属箔担体に白金族金属を含んたアルミナからな
る耐熱性、接着性に優れた被覆層を有する燃焼ガス浄化
用触媒を容易にかつ経済的に得ることができる。As shown in Table 7 G-Effects of the Invention (2), according to the present invention, a coating layer having excellent heat resistance and adhesiveness is made of alumina containing a platinum group metal on a metal foil carrier or a metal foil carrier. A catalyst for purifying combustion gas having the following properties can be easily and economically obtained.
第１図〜第６図はそれぞれ本発明の実施例の燃焼ガス浄
化用触媒の外観図、第７図は本発明の触媒を石油ストー
ブに設置した図である。
１・Φ拳中空円筒状金属／Ｓニカム体、３拳・・貫通孔
、４・・・金属箔。
代理人の氏名 弁理士 粟野重孝 ほか１名第
区
第
図
八FIGS. 1 to 6 are external views of combustion gas purifying catalysts according to embodiments of the present invention, and FIG. 7 is a diagram showing the catalyst of the present invention installed in a kerosene stove. 1. Φ fist hollow cylindrical metal/S nicum body, 3 fists... through hole, 4... metal foil. Name of agent: Patent attorney Shigetaka Awano and one other person No. 8, Ward No. 8
Claims (8)
活性アルミナからなる被覆層を形成したことを特徴とす
る燃焼ガス浄化用触媒。(1) A catalyst for purifying combustion gas, characterized in that a coating layer made of activated alumina containing a platinum group metal is formed on a hollow cylindrical metal honeycomb body.
を含んだ活性アルミナからなる被覆層を形成したことを
特徴とする燃焼ガス浄化用触媒。(2) A catalyst for purifying combustion gas, characterized in that a coating layer made of activated alumina containing a platinum group metal is formed on a hollow cylindrical metal foil body having through holes.
に大きくすることを特徴とする請求項２記載の燃焼ガス
浄化用触媒。(3) The combustion gas purifying catalyst according to claim 2, wherein the diameter of the through hole gradually increases as the distance from the combustion flame increases.
属を含んだ活性アルミナからなる被覆層を形成したこと
を特徴とする燃焼ガス浄化用触媒。(4) A catalyst for purifying combustion gas, characterized in that a coating layer made of activated alumina containing a platinum group metal is formed on a hollow cylindrical metal foil body with slits.
セリウムからなることを特徴とする請求項１〜４のいず
れかに記載の燃焼ガス浄化用触媒。(5) The combustion gas purifying catalyst according to any one of claims 1 to 4, wherein the coating layer containing a platinum group metal is composed of activated alumina and cerium oxide.
ロム、アルミニウムから成るステンレス鋼であることを
特徴とする請求項１〜５のずれかに記載の燃焼ガス浄化
用触媒。(6) The combustion gas purifying catalyst according to any one of claims 1 to 5, wherein the hollow cylindrical metal honeycomb body or foil body is made of stainless steel made of iron, chromium, or aluminum.
る請求項１〜６のいずれかに記載の燃焼ガス浄化用触媒
。(7) The combustion gas purifying catalyst according to any one of claims 1 to 6, wherein the hollow cylindrical metal foil body is wavy.
によりアルミナからなる第１被覆層を形成し、さらに白
金族金属を含んだ活性アルミナからなる第２被覆層を形
成したことを特徴とする請求項１〜７のいずれかに記載
の燃焼ガス浄化用触媒。(8) A first coating layer made of alumina is formed on a hollow cylindrical metal honeycomb body or a foil body by thermal spraying, and a second coating layer made of activated alumina containing a platinum group metal is further formed. The combustion gas purifying catalyst according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63312299A JP2553678B2 (en) | 1988-12-09 | 1988-12-09 | Oil stove combustion gas purification catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63312299A JP2553678B2 (en) | 1988-12-09 | 1988-12-09 | Oil stove combustion gas purification catalyst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02157047A true JPH02157047A (en) | 1990-06-15 |
| JP2553678B2 JP2553678B2 (en) | 1996-11-13 |
Family
ID=18027578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63312299A Expired - Fee Related JP2553678B2 (en) | 1988-12-09 | 1988-12-09 | Oil stove combustion gas purification catalyst |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2553678B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4201356B2 (en) * | 1996-06-20 | 2008-12-24 | 本田技研工業株式会社 | Exhaust gas purification device for internal combustion engine |
| US6596243B1 (en) | 1996-06-20 | 2003-07-22 | Honda Giken Kogyo Kabushiki Kaisha | Catalyst element for purifying exhaust gases from internal combustion engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5541812A (en) * | 1978-09-18 | 1980-03-24 | Lundholms Verksteder Ab | Liquid filter |
| JPS5550706A (en) * | 1978-10-06 | 1980-04-12 | Eichi Ueruzu Donarudo | Mutual transductance variable tuning antenna |
| JPS5613631U (en) * | 1979-07-10 | 1981-02-05 | ||
| JPS6291244A (en) * | 1985-05-23 | 1987-04-25 | Nippon Shokubai Kagaku Kogyo Co Ltd | Catalyst for purifying exhaust gas |
| JPS63162045A (en) * | 1986-12-25 | 1988-07-05 | Toyota Motor Corp | Production of catalyst deposited on metallic carrier for cleaning exhaust gas |
-
1988
- 1988-12-09 JP JP63312299A patent/JP2553678B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5541812A (en) * | 1978-09-18 | 1980-03-24 | Lundholms Verksteder Ab | Liquid filter |
| JPS5550706A (en) * | 1978-10-06 | 1980-04-12 | Eichi Ueruzu Donarudo | Mutual transductance variable tuning antenna |
| JPS5613631U (en) * | 1979-07-10 | 1981-02-05 | ||
| JPS6291244A (en) * | 1985-05-23 | 1987-04-25 | Nippon Shokubai Kagaku Kogyo Co Ltd | Catalyst for purifying exhaust gas |
| JPS63162045A (en) * | 1986-12-25 | 1988-07-05 | Toyota Motor Corp | Production of catalyst deposited on metallic carrier for cleaning exhaust gas |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2553678B2 (en) | 1996-11-13 |
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