JPH0364390A - Preparation of gas seal member - Google Patents
Preparation of gas seal memberInfo
- Publication number
- JPH0364390A JPH0364390A JP20158489A JP20158489A JPH0364390A JP H0364390 A JPH0364390 A JP H0364390A JP 20158489 A JP20158489 A JP 20158489A JP 20158489 A JP20158489 A JP 20158489A JP H0364390 A JPH0364390 A JP H0364390A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- felt
- rare earth
- seal member
- earth 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
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 7
- 239000012784 inorganic fiber Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 150000002910 rare earth metals Chemical class 0.000 claims description 5
- 239000012266 salt solution Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 20
- 239000000835 fiber Substances 0.000 abstract description 17
- 239000003054 catalyst Substances 0.000 abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 15
- 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 abstract description 14
- 239000000377 silicon dioxide Substances 0.000 abstract description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 7
- 229910000420 cerium oxide Inorganic materials 0.000 abstract description 7
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 abstract description 7
- 230000003197 catalytic effect Effects 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- 229910052697 platinum Inorganic materials 0.000 abstract description 3
- -1 rare earth metal salt Chemical class 0.000 abstract description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 abstract description 2
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 42
- 239000007864 aqueous solution Substances 0.000 description 10
- 238000007084 catalytic combustion reaction Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000004108 freeze drying Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- DEXFNLNNUZKHNO-UHFFFAOYSA-N 6-[3-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperidin-1-yl]-3-oxopropyl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1CCN(CC1)C(CCC1=CC2=C(NC(O2)=O)C=C1)=O DEXFNLNNUZKHNO-UHFFFAOYSA-N 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- WMOHXRDWCVHXGS-UHFFFAOYSA-N [La].[Ce] Chemical compound [La].[Ce] WMOHXRDWCVHXGS-UHFFFAOYSA-N 0.000 description 1
- KVRGDVMQISBTKV-UHFFFAOYSA-N acetic acid;oxalic acid Chemical compound CC(O)=O.OC(=O)C(O)=O KVRGDVMQISBTKV-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- CFYGEIAZMVFFDE-UHFFFAOYSA-N neodymium(3+);trinitrate Chemical compound [Nd+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O CFYGEIAZMVFFDE-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Gas Burners (AREA)
- Sealing Material Composition (AREA)
- Gasket Seals (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 石油の未燃混合気を触媒燃焼する触媒恢
あるいはガス 石油の燃焼排ガスを浄化する触媒体の
使用に際限 触媒体とそれを保持する枠体との隙間に充
分なシール性が要求されるガスシール部材の製造方法に
関すａ
従来の技術
従来 一般にガスシール部材としては耐熱性無機繊維を
シート汰 フェルト次 ブランケット状に加工し これ
らを使用したい場所に圧縮した状態で、挟込みながら使
用してい島 しかし これでは触媒体とそれを保持する
枠体との隙間を充分にガスシールすることが困難であっ
九
具体的に説明すると、触媒燃焼装置では高濃度の未燃混
合気をハニカム形状の触媒体に供給し触媒燃焼させも
その時間 触媒体とそれを保持する枠体との隙間のシー
ル部かられずかなガス漏れが生じてｋ 未燃ガスは著し
い臭気の発生をもたらす。[Detailed Description of the Invention] Industrial Field of Application The present invention is limited to the use of a catalyst for catalytically burning an unburned mixture of gas or oil, or a catalyst for purifying combustion exhaust gas of gas or oil. Conventional technology Conventional gas sealing materials are generally made of heat-resistant inorganic fibers processed into sheets, felts, and blankets. However, with this method, it is difficult to sufficiently seal the gap between the catalyst body and the frame that holds it. The device also supplies a highly concentrated unburned air-fuel mixture to a honeycomb-shaped catalyst body for catalytic combustion.
During that time, a small amount of gas leaks from the seal between the catalyst and the frame that holds it, and the unburned gas causes a significant odor.
そこで触媒体とそれを保持する枠体との隙間には充分な
注意を払う必要があり、従来の無機繊維シール部材玄
そのシール性を改善するためにはガスシール部材のかさ
密度を大きくし ち密にしなければらなかった
発明が解決しようとする課題
しかし 従来の無機繊維シール部材において、そのかさ
密度を大きくし ち密にするとガスシール部材のクツシ
ョン性は失われてくる。Therefore, it is necessary to pay sufficient attention to the gap between the catalyst body and the frame that holds it.
In order to improve the sealing performance, the bulk density of the gas seal member must be increased and the gas sealing member must be made denser. The sealing member loses its cushioning properties.
その結巣 触媒燃焼状態で高温になった触媒体と枠体と
はともに膨張する力交 熱膨張に差がある場合（一般に
は枠体の方が触媒体よりも熱膨張係数が大きい）にはク
ツション性の失われたシール部材では隙間ができ、未燃
ガスがスリップし易く、これを従来のガスシール部材で
防止しようとすることは困難であっ九
したがって、本発明は従来の課題にもとづき、ガスシー
ル部材のクツション性を適度に維持することができ、か
つ未燃ガスの浄化を行うことができるよう考えられたも
のであも
課題を解決するための手段
本発明（よ （１）耐熱性無機繊維からなるシートある
いはフェルトに水溶性希土類金属塩溶液を含浸後、乾燥
熱分解して、希土類金属酸化物をシートあるいはフェ
ルト中に分散担持させ、次いで前記シートあるいはフェ
ルトに白金族系金属を担持させることを特徴とするガス
シール部材の製造方法、 （２）耐熱性無機繊維からな
るシートあるいはフェルトに水溶性希土類金属塩溶液を
含浸後、凍結乾燥 熱分解して、希土類金属酸化物をシ
ートあるいはフェルト中に分散担持させ、次いで前記シ
ートあるいはフェルトに白金族系金属を担持させること
を特徴とするガスシール部材の製造方法 （３）上記シ
ートあるいはフェルトが２ｍ’／ｇ以上の比表面積を有
し かつ０．１５〜０．５０ｇ／ｃｃのかさ密度を有す
るガスシール部材の製造方法 であａ
作 用
本発明は上記手段により、優れたガスシール性を有する
部材を提供できも
具体的に（よ 触媒燃焼装置において未燃混合気を着火
させる時にζ瓜 ハニカム形状の触媒体は充分な活性を
示す温度にまで加温され また同時に本発明によるガス
シール部材も加温されも そのためシール部材に担持さ
れた白金族金属も充分な触媒活性を発揮できる温度にま
で達し シール部材中に浸入してくる未燃ガスはここで
も触媒燃焼し 完全浄化されも したがって、従来のよ
うに未燃ガスがそのままシール部材から漏れてしまうよ
うなことはな（ｌ また 従来のシール部材が存してい
たクツション性も本発明によるシール部材において損な
われないよう注意し九
ここで、従来の耐熱性無機繊維だけからなるガスシール
部材に直接白金族金属を担持したものであれ（′Ｌ 耐
熱性無機繊維に対する白金族金属粒子の分散性は悪く、
すぐに触媒は熱劣化を起こしてしまってい九
しかし 本発明のように耐熱性無機繊維からなるシート
あるいはフェルト中に希土類金属酸化物を均一に分散担
持味 そこに白金族金属を担持させたガスシール部材で
あれば希土類金属酸化物が触媒担体として働き、熱劣化
等の心配もほとんどな一℃ また 耐熱性無機繊維から
なるシートあるいはフェルト中に希土類金属酸化物を担
持させる隊 シートあるいはフェルトの厚みが薄い（約
３ｍｍ以下）と問題にならない力丈 厚くなってくると
希土類金属塩水溶液を含浸、乾燥する工程で厚み方向に
担持ムラができてくも したがって、本発明では凍結乾
燥方法を使用することにより、その担持ムラを改善した
本発明で使用する水溶性希土類金属塩溶液とはセリウム
ランタン、ネオジムの硝酸塩 酢酸塩シュウ酸塩等が
あげられ これらを単独または混合溶液として使用し
希土類金属酸化物とする。The formation of a force exchange in which the catalytic body and the frame expand together when the temperature reaches a high temperature during catalytic combustion.If there is a difference in thermal expansion (generally the frame has a larger coefficient of thermal expansion than the catalytic body), A sealing member that has lost its cushioning properties creates a gap and unburned gas easily slips, and it is difficult to prevent this with conventional gas sealing members. Therefore, the present invention is based on the conventional problem, Means for Solving the Problems The present invention is designed to be able to maintain appropriate cushioning properties of gas seal members and to purify unburned gas.(1) Heat resistance After a sheet or felt made of inorganic fibers is impregnated with a water-soluble rare earth metal salt solution, it is dried and thermally decomposed to disperse and support the rare earth metal oxide in the sheet or felt, and then the platinum group metal is supported on the sheet or felt. (2) A sheet or felt made of heat-resistant inorganic fibers is impregnated with a water-soluble rare earth metal salt solution, and then freeze-dried and pyrolyzed to form a rare earth metal oxide into a sheet or felt. A method for producing a gas seal member, characterized in that the sheet or felt has a specific surface area of 2 m'/g or more. A method for producing a gas seal member having a bulk density of 0.15 to 0.50 g/cc. When igniting an unburned air-fuel mixture in a catalytic combustion device, the zeta honeycomb-shaped catalyst body is heated to a temperature that exhibits sufficient activity, and at the same time, the gas seal member according to the present invention is also heated. The platinum group metals also reach a temperature at which they can exhibit sufficient catalytic activity, and the unburned gas that enters the seal member is catalytically combusted here as well and is completely purified. In addition, care must be taken to ensure that the cushioning properties of conventional seal members are not impaired in the seal member of the present invention. Even if the platinum group metal is directly supported on the sealing member ('L), the dispersibility of the platinum group metal particles in heat-resistant inorganic fibers is poor;
However, as in the present invention, a gas seal in which rare earth metal oxides are uniformly dispersed and supported in a sheet or felt made of heat-resistant inorganic fibers has a platinum group metal supported therein. If it is a component, the rare earth metal oxide acts as a catalyst carrier, and there is almost no worry about thermal deterioration. If the thickness is thin (approximately 3 mm or less), the strength will not be a problem.If the thickness becomes thicker, uneven loading may occur in the thickness direction during the process of impregnating with rare earth metal salt aqueous solution and drying.Therefore, in the present invention, by using the freeze-drying method, The water-soluble rare earth metal salt solution used in the present invention that improves the unevenness of its support includes cerium lanthanum, neodymium nitrate, acetate oxalate, etc. These can be used alone or as a mixed solution.
Rare earth metal oxide.
また その添加量は耐熱性無機繊維からなるシートある
いはフェルトのかさ密度に合わせて調製しガスシール部
材のクツション性が維持できるよう注意し九
本発明で使用する耐熱性無機繊維からなるシートあるい
はフェルトと（よ アルミナシリカ繊縁炭化珪素織地
窒化珪素繊維等の耐熱性を有する無機繊維からなるもの
であればよい力（コストの観点から考え 現在広い用途
で使われているアルミナシリカ繊維がもっとも好ましｔ
〜 また その組成としてはアルミナ ４０〜９５ ｗ
ｔ ９Ａ シリカ ５〜６０ｗｔ％ものが好ましし
〜 その理由は耐熱性を考慮するならばアルミナ分を多
くすることが好ましいのである力交 アルミナ分を多く
し過ぎると繊維が脆くなってくるためであも またガス
シール部材のクツション法 機械的強度を考慮すると、
繊維長５０ｍｍ以五 繊維径５μｍ以下の繊維からなべ
かさ密度０．１５〜０．４０ ｇ／ＣＣ程度のシート
あるいはフェルトを使用して希土類金属酸化物の担持を
行うことが好ましｂ〜一実施
例下、本発明の一実施例におけるガスシール部材の製造
方法について説明すん
（実施例１）
アルミナ ７０ｗｔ賊 シリカ ３０ｗｔに繊維長 約
５０ｍｍ、 繊維径 約３μｍのアルミナシリカ繊維
からなる厚み６ｍｍのフェル１− （かさ密度 ０．１
８ｇ／ｃｃ）に０．２モルの硝酸セリウム水溶液を含浸
機 ８０℃で１時間乾燥後、５００℃で３０分間熱処理
し、酸化セリウムを２２ｗｔ％分散担持させ九 その抵
このガスシール部材を塩化白金酸の水溶液に浸漬し
乾風 熱処理を行い、白金を０．１ｗｔ％担持させｔ、
−６本実施例で得られたガスシール部材２は第１図のよ
うな触媒燃焼装置を使用し シール部でのＨＣガス濃度
をシール部から１ｃｍ離れたところに２ｍｍφのノズル
を設は測定することにより評価し？＝ 触媒燃焼装置
は触媒体１に６ ｋｃａｌ・ｈ／ｃｍ’の燃焼負荷をか
１す、触媒体１を約８００℃に設定μ ガス濃度を測定
し九 な耘 ３は前記触媒体１を保持する枠恢 ４は燃
料ガス供給餓 ５は送風ａ ６は予混合気立 ７は排出
部であもまた ガスシール部材寿命試験として上記燃焼
状態を１時間続けた表 消火ＬＡ ３０分間冷却する工
程を１サイクルとＬ １０００サイクル後に再度上記
燃焼状態でのガスシール性を評価し九（比較例１）
実施例１におけるアルミナシリカ繊維からなる厚み６ｍ
ｍのフェルトをガスシール部材とし九（比較例２）
比較例１のガスシール部材を塩化白金酸の水溶液に浸漬
Ｌ ｉｌＬ 熱処理を行へ 白金を０．１ｗｔ％担
持させたものをガスシール部材とした比較例工、 ２で
得られたガスシール部材のシール性も実施例１と同様な
条件で測定し一実施例１、比較例１、２について初期と
１０００サイクル後の結果を第１表に示す。In addition, the amount added should be adjusted according to the bulk density of the sheet or felt made of heat-resistant inorganic fibers, and care should be taken to maintain the cushioning properties of the gas sealing member. (Yo Alumina Silica Fiber Edge Silicon Carbide Woven Fabric
It should be made of heat-resistant inorganic fibers such as silicon nitride fibers (from a cost perspective, alumina-silica fibers, which are currently used in a wide range of applications, are most preferable).
~ Also, its composition is alumina 40~95w
t 9A Silica 5 to 60 wt% is preferable.The reason is that if heat resistance is considered, it is preferable to increase the alumina content.If the alumina content is too large, the fibers will become brittle. Cushion method for gas seal members Considering mechanical strength,
It is preferable to support the rare earth metal oxide using a sheet or felt made of fibers with a fiber length of 50 mm or more and a fiber diameter of 5 μm or less and a bulk density of about 0.15 to 0.40 g/CC. As an example, a method for manufacturing a gas seal member according to an embodiment of the present invention will be explained (Example 1) A 6 mm thick fel 1 is made of alumina 70 wt, silica 30 wt, alumina silica fiber with a fiber length of about 50 mm, and a fiber diameter of about 3 μm. - (Bulk density 0.1
8g/cc) was impregnated with a 0.2 mol cerium nitrate aqueous solution using an impregnation machine. After drying at 80°C for 1 hour, heat treatment was performed at 500°C for 30 minutes to disperse and support 22 wt% of cerium oxide. immersed in an aqueous solution of acid
Dry air heat treatment to support 0.1 wt% of platinum,
-6 For the gas seal member 2 obtained in this example, a catalytic combustion device as shown in Fig. 1 was used, and the HC gas concentration at the seal portion was measured by installing a 2 mmφ nozzle 1 cm away from the seal portion. Evaluate by that? = The catalytic combustion device applies a combustion load of 6 kcal/h/cm' to the catalyst body 1, the catalyst body 1 is set at approximately 800°C, the gas concentration is measured, and the catalyst body 1 is held. Frame 4 is fuel gas supply starvation 5 is air blowing a 6 is premixed air 7 is exhaust section Table where the above combustion condition was continued for 1 hour as a gas seal member life test Fire extinguishing LA Cooling process for 30 minutes 1 cycle and L After 1000 cycles, the gas sealing property was evaluated again under the above combustion conditions.
(Comparative Example 2) The gas seal member of Comparative Example 1 was immersed in an aqueous solution of chloroplatinic acid. Proceed to heat treatment. The sealing properties of the gas seal members obtained in Comparative Example Work and 2 were also measured under the same conditions as in Example 1. The results for Example 1, Comparative Examples 1 and 2 at the initial stage and after 1000 cycles are shown in Table 1. show.
第１表
この結果
本実施例のガスシール部材２は優れ
たガスシール性を示していも また 比較例２では初期
においては優れたガスシール性を示した力丈その後に熱
劣化が進へ シール部材に担持された触媒金属が浄化効
果を発揮できなくなり九 また比較例１では最初から充
分なガスのシールを行うことができなかっ九
な抵 本実施例のガスシール部材２に対して厚み６ｍｍ
の断面方向に酸化セリウムの分散状態を分析した結果
第２図（Ａ）のようにかなり担持ムラのあることがわか
った そこで、この担持ムラを改善するた八 次の実施
例２では硝酸セリウム水溶液の原級 真空乾燥を行っ九
（実施例２）
実施例１で使用したアルミナシリカ繊維フェルトに０．
０３〜０．８モルの硝酸セリウム水溶液を含浸後、−８
０℃で原級 真空乾燥を行った檄５００℃で３０分間熱
処理ニ 酸化セリウムを分散担持させた その喪 それ
ぞれのガスシール部材を塩化白金酸の水溶液に浸漬し
乾燥 熱処理を行し＼ 白金を０．１ｗｔ％担持させた
得られた８種類のガスシール部材（実施例２−１〜８
）のシール性は実施例１と同様な条件で測定し九また
ガスシール部材のクツション性（復元性）について（よ
部材を１ｃｍ”に切出し プレスで１０ｋｇ／ａｍ２
の荷重をかけた後の復元率で評価し九
それらの結果を第２表に示す。Table 1 As a result, although the gas seal member 2 of this example showed excellent gas sealing properties, the seal member of Comparative Example 2 showed excellent gas sealing properties at the initial stage, but thermal deterioration progressed after that. Furthermore, in Comparative Example 1, sufficient gas sealing could not be achieved from the beginning.
Results of analyzing the dispersion state of cerium oxide in the cross-sectional direction of
As shown in Figure 2 (A), it was found that there was considerable loading unevenness. Therefore, in order to improve this loading unevenness, in the next Example 2, a raw grade cerium nitrate aqueous solution was vacuum dried (Example 2). The alumina-silica fiber felt used in Example 1 was coated with 0.
-8 after impregnation with cerium nitrate aqueous solution of 03 to 0.8 mol
After vacuum drying at 0℃ and heat treatment at 500℃ for 30 minutes, cerium oxide was dispersed and supported.Each gas seal member was immersed in an aqueous solution of chloroplatinic acid.
Eight types of gas seal members (Examples 2-1 to 8) were subjected to drying and heat treatment to support 0.1 wt% of platinum.
) was measured under the same conditions as Example 1.
Regarding the cushioning properties (recovery properties) of gas seal parts (cut the part into 1cm" pieces and press 10kg/am2)
The results are shown in Table 2.
実施例２−５のガスシール部材に対して厚み６ｍｍの断
面方向に酸化セリウムの分散状態を分析した結果を第２
図（Ｂ）に示す。この結果 実施例２−５は実施例１に
比べ 担持ムラが改善されているのがわかっ九 すなわ
板 硝酸セリウム水溶液をフェルトに含浸檄 凍結乾凰
熱分解を行うことにより、酸化セリウムは均一に分散
担持された
（実施例３）
かさ密度０．２９ｇ／ｃｃ、 厚み６ｍｍのアルミナ
シリカ繊維フェルトに０．０３〜０．５モルの硝酸セリ
ウム水溶液を含浸丸 実施例２と同様に凍結乾燥処理し
て７種類のガスシール部材（実施例３−１〜７）を（象
シール性も同様な条件で測定し旭 それらの結果を第
３表に示す。The results of analyzing the dispersion state of cerium oxide in the cross-sectional direction of a thickness of 6 mm for the gas seal member of Example 2-5 are shown in the second table.
Shown in Figure (B). As a result, it was found that the uneven loading of Example 2-5 was improved compared to Example 1. In other words, by impregnating the felt with an aqueous solution of cerium nitrate, freeze-drying, and thermal decomposition, the cerium oxide was uniformly deposited. Dispersed support (Example 3) Alumina-silica fiber felt with a bulk density of 0.29 g/cc and a thickness of 6 mm was impregnated with 0.03 to 0.5 mol of cerium nitrate aqueous solution. Freeze-drying was performed in the same manner as in Example 2. The sealing properties of seven types of gas seal members (Examples 3-1 to 3-7) were also measured under similar conditions, and the results are shown in Table 3.
（以下余白）
（実施例４）
かさ密度０．４０ｇ／ｃｃ、 厚み６ｍｍのアルミナ
シリカ繊維フェルトに０．０３〜０．４モルの硝酸セリ
ウム水溶液を含浸機 実施例２と同様に凍結乾燥処理し
て６種類のガスシール部材（実施例４−１〜６）を焦
シール性も同様な条件で測定し丸 それらの結果を第４
表に示す。(Leaving space below) (Example 4) Alumina-silica fiber felt with a bulk density of 0.40 g/cc and a thickness of 6 mm was impregnated with 0.03 to 0.4 mol of cerium nitrate aqueous solution using a freeze-drying process in the same manner as in Example 2. Six types of gas seal members (Examples 4-1 to 4-6) were
Sealing performance was also measured under similar conditions.
Shown in the table.
（以下余白）
第２爽 第３表 第４表の結果か収 ガスシール部材ζ
よ アルミナシリカ繊維に酸化セリウムが担持され 比
表面積２ｍ”７２以上の啄 優れたシール性を示すこと
がわかっ九
しかし 担持する酸化セリウムが多くなってくると、ガ
スシール部材のクツシヨン性（復元性）は急激に悪くな
り、触媒燃焼装置で燃息 消火を繰り返した啄 触媒体
とシール部材あるいはシール部材と枠体との間に隙間が
でき易くなり、初期においては優れた性能を示している
にもかかわらづ−寿命試験後にはガス漏れが生じてしま
っ九したがって、本発明におけるガスシール部材のかさ
密度は０．１５〜０．５０ ｇ／ ｃ ｃの範囲にする
のが好ましｔ〜
発明の効果
本発明によれ（′Ｌ 触媒体とそれを保持する枠体との
隙間のガスシール部材より漏れる未燃成分を完全に防止
できも 特にガスに高濃度の未燃成分が含まれる触媒燃
焼装置では本発明の効果が著しまた 従来に比べ触媒体
とそれを保持する枠体との間の気密性に注意を払わなく
てもガスシール部材に担持された触媒の作用により、部
材に浸入してきた未燃分が燃焼浄化されも(Left below) 2nd Refill Table 3 Results of Table 4 Gas seal member ζ
It has been found that cerium oxide is supported on alumina-silica fibers and exhibits excellent sealing properties when the specific surface area is 2m72 or more. After repeatedly extinguishing the flame with the catalytic combustion device, gaps tend to form between the catalytic body and the sealing member, or between the sealing member and the frame, and even though the performance was initially excellent, However, gas leakage may occur after the life test. Therefore, the bulk density of the gas seal member in the present invention is preferably in the range of 0.15 to 0.50 g/cc. Effects of the Invention According to the present invention ('L), it is possible to completely prevent unburned components from leaking from the gas sealing member in the gap between the catalyst body and the frame that holds it. The effect of the present invention is remarkable, and compared to the conventional method, even if no attention is paid to the airtightness between the catalyst body and the frame holding it, the catalyst supported on the gas sealing member can penetrate into the member. Even if unburned matter is purified by combustion,
Claims (3)
に水溶性希土類金属塩溶液を含浸後、乾燥熱分解して、
希土類金属酸化物をシートあるいはフェルト中に分散担
持させ、次いで前記シートあるいはフェルトに白金族系
金属を担持させることを特徴とするガスシール部材の製
造方法。(1) After impregnating a sheet or felt made of heat-resistant inorganic fibers with a water-soluble rare earth metal salt solution, drying and pyrolyzing the
A method for producing a gas seal member, which comprises dispersing and supporting a rare earth metal oxide in a sheet or felt, and then supporting a platinum group metal in the sheet or felt.
に水溶性希土類金属塩溶液を含浸後、凍結乾燥熱分解し
て、希土類金属酸化物をシートあるいはフェルト中に分
散担持させ、次いで前記シートあるいはフェルトに白金
族系金属を担持させることを特徴とするガスシール部材
の製造方法。(2) A sheet or felt made of heat-resistant inorganic fibers is impregnated with a water-soluble rare earth metal salt solution, and then freeze-dried and pyrolyzed to disperse and support the rare earth metal oxide in the sheet or felt. A method for manufacturing a gas seal member, characterized in that it supports a platinum group metal.
表面積を有し、かつ０．１５〜０．５０ｇ／ｃｃのかさ
密度を有することを特徴とする請求項１または２記載の
ガスシール部材の製造方法。(3) The gas seal member according to claim 1 or 2, wherein the sheet or felt has a specific surface area of 2 m^2/g or more and a bulk density of 0.15 to 0.50 g/cc. manufacturing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20158489A JPH07119401B2 (en) | 1989-08-03 | 1989-08-03 | Method for manufacturing gas seal member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20158489A JPH07119401B2 (en) | 1989-08-03 | 1989-08-03 | Method for manufacturing gas seal member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0364390A true JPH0364390A (en) | 1991-03-19 |
| JPH07119401B2 JPH07119401B2 (en) | 1995-12-20 |
Family
ID=16443481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20158489A Expired - Fee Related JPH07119401B2 (en) | 1989-08-03 | 1989-08-03 | Method for manufacturing gas seal member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07119401B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994022935A1 (en) * | 1993-03-31 | 1994-10-13 | Rhone-Poulenc Chimie | Method for preparing aqueous emulsions of oils and/or gums and/or preferably masked (poly)isocyanate resins, and resulting emulsions |
| KR20200053288A (en) * | 2018-11-08 | 2020-05-18 | 재단법인 포항산업과학연구원 | Gasket material for molten carbonate fuel cell, its preparation method and preparation method of gasket for molten carbonate fuel cell comprising the same |
-
1989
- 1989-08-03 JP JP20158489A patent/JPH07119401B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994022935A1 (en) * | 1993-03-31 | 1994-10-13 | Rhone-Poulenc Chimie | Method for preparing aqueous emulsions of oils and/or gums and/or preferably masked (poly)isocyanate resins, and resulting emulsions |
| KR20200053288A (en) * | 2018-11-08 | 2020-05-18 | 재단법인 포항산업과학연구원 | Gasket material for molten carbonate fuel cell, its preparation method and preparation method of gasket for molten carbonate fuel cell comprising the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07119401B2 (en) | 1995-12-20 |
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