JPH07119401B2 - Method for manufacturing gas seal member - Google Patents
Method for manufacturing gas seal memberInfo
- Publication number
- JPH07119401B2 JPH07119401B2 JP20158489A JP20158489A JPH07119401B2 JP H07119401 B2 JPH07119401 B2 JP H07119401B2 JP 20158489 A JP20158489 A JP 20158489A JP 20158489 A JP20158489 A JP 20158489A JP H07119401 B2 JPH07119401 B2 JP H07119401B2
- Authority
- JP
- Japan
- Prior art keywords
- seal member
- felt
- gas
- sheet
- gas seal
- 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 - Fee Related
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000000034 method Methods 0.000 title claims description 7
- 239000012784 inorganic fiber Substances 0.000 claims description 13
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 13
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 7
- 150000002910 rare earth metals Chemical class 0.000 claims description 6
- 239000012266 salt solution Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 55
- 239000003054 catalyst Substances 0.000 description 23
- 238000007789 sealing Methods 0.000 description 18
- 239000000835 fiber Substances 0.000 description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 14
- 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 12
- 239000000377 silicon dioxide Substances 0.000 description 10
- 239000007864 aqueous solution Substances 0.000 description 8
- 238000007084 catalytic combustion reaction Methods 0.000 description 8
- 229910000420 cerium oxide Inorganic materials 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 4
- 238000004108 freeze drying Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 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 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 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
- -1 rare earth metal salt Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 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
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Landscapes
- Gasket Seals (AREA)
- Gas Burners (AREA)
- Sealing Material Composition (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はガス、石油の未然混合気を触媒燃焼する触媒
体、あるいはガス、石油の燃焼排ガスを浄化する触媒体
の使用に際し、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
に関する。TECHNICAL FIELD The present invention relates to a catalyst body and a catalyst body for purifying the combustion exhaust gas of gas or petroleum when using the catalyst body for catalytic combustion of a mixture of gas and petroleum. The present invention relates to a method for manufacturing a gas seal member, which requires a sufficient sealing property in a gap between a frame body to be held.
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
シート状、フェルト状、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
用していた。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
た。2. Description of the Related Art Conventionally, as a gas seal member, generally, heat-resistant inorganic fibers have been processed into a sheet shape, a felt shape, or a blanket shape, and these have been used while being compressed in a place where they are desired to be used. However, this makes it difficult to sufficiently seal the gap between the catalyst body and the frame holding it with gas.
具体的に説明すると、触媒燃焼装置では高濃度の未然混
合気をハニカム形状の触媒体に供給し、触媒燃焼させ
る。その時に、触媒体とそれを保持する枠体との隙間の
シール部からわずかなガス漏れが生じても、未然ガスは
著しい臭気の発生をもたらす。More specifically, in the catalytic combustion device, a high-concentration air-fuel mixture is supplied to the honeycomb-shaped catalyst body for catalytic combustion. At that time, even if a slight gas leak occurs from the seal portion in the gap between the catalyst body and the frame holding the catalyst body, the 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で、
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。Therefore, it is necessary to pay sufficient attention to the gap between the catalyst body and the frame body that holds it. With the conventional inorganic fiber seal member,
In order to improve the sealing property, it is necessary to increase the bulk density of the gas sealing member to make it dense.
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ッシ
ョン性は失われてくる。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the conventional inorganic fiber seal member, when the bulk density is increased and the density is made dense, the cushioning property of the gas seal member is lost.
その結果、触媒燃焼状態で高温になった触媒体と枠体と
はともに膨張するが、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）にはクッ
ション性の失われたシール部材では隙間ができ、未然ガ
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た。As a result, both the catalyst body and the frame body, which become hot in the catalytic combustion state, expand together, but when there is a difference in thermal expansion (in general, the frame body has a larger coefficient of thermal expansion than the catalyst body). It is difficult to prevent this from occurring with a conventional gas seal member because a gap is formed in the seal member having a loss of cushioning property and gas is likely to slip.
したがって、本発明は従来の課題にもとづき、ガスシー
ル部材のクッション性を適度に維持することができ、か
つ未然ガスの浄化を行うことができるよう考えられたも
のである。Therefore, the present invention has been conceived based on the conventional problem so that the cushioning property of the gas seal member can be appropriately maintained and the gas can be purified.
課題を解決するための手段 本発明は、（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2m2/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、である。Means for Solving the Problems The present invention includes (1) impregnating a sheet or felt made of a heat-resistant inorganic fiber with a water-soluble rare earth metal salt solution, and then drying,
A method for producing a gas seal member, which comprises thermally decomposing and carrying a rare earth metal oxide dispersed and supported in a sheet or felt, and then carrying a platinum group metal on the sheet or felt, (2) heat-resistant inorganic A sheet or felt made of fibers is impregnated with a water-soluble rare earth metal salt solution, freeze-dried and pyrolyzed to disperse and carry a rare earth metal oxide in the 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 2 / g or more, and
A method for producing a gas seal member having a bulk density of 0.15 to 0.50 g / cc.
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
部材を提供できる。Effect The present invention can provide a member having excellent gas sealing properties by the above means.
具体的には、触媒燃焼装置において未燃混合気を着火さ
せる時には、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
ル部材も加温される。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、完全浄化される。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
ことはない。また、従来のシール部材が有していたクッ
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
いよう注意した。Specifically, when the unburned air-fuel mixture is ignited in the catalytic combustion device, the honeycomb-shaped catalyst body is heated to a temperature at which sufficient activity is exhibited, and at the same time, the gas seal member according to the present invention is also heated. Therefore, the platinum group metal carried on the seal member also reaches a temperature at which sufficient catalytic activity can be exerted, and the unburned gas entering the seal member is also catalytically burned and completely purified. Therefore, unlike the conventional case, unburned gas does not leak from the seal member as it is. Further, care was taken not to impair the cushioning property of the conventional seal member in the seal member according to the present invention.
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ば、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た。Here, if the platinum group metal is directly supported on the conventional gas seal member composed of only the heat resistant inorganic fiber, the dispersibility of the platinum group metal particles in the heat resistant inorganic fiber is poor, and the catalyst is immediately subjected to thermal deterioration. I had woken up.
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
持し、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い。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
させる時、シートあるいはフェルトの厚みが薄い（約3m
m以下）と問題にならないが、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
ラができてくる。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。However, as in the present invention, a rare earth metal oxide is a catalyst if the rare earth metal oxide is uniformly dispersed and supported in a sheet or felt made of heat resistant inorganic fibers, and a platinum group metal is supported thereon. It works as a carrier and there is almost no concern about heat deterioration. Also, when a rare earth metal oxide is supported on a sheet or felt made of heat-resistant inorganic fiber, the thickness of the sheet or felt is thin (about 3 m
However, if the thickness becomes thicker, uneven loading will occur in the thickness direction in the process of impregnating the rare earth metal salt aqueous solution and drying. Therefore, in the present invention, by using the freeze-drying method, the carrying unevenness thereof was improved.
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。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ッション性が維
持できるよう注意した。Examples of the water-soluble rare earth metal salt solution used in the present invention include cerium, lanthanum, neodymium nitrate, acetate, oxalate and the like, and these are used alone or as a mixed solution to prepare a rare earth metal oxide. Also, the amount added was adjusted according to the bulk density of the sheet or felt made of heat-resistant inorganic fiber, and care was taken to maintain the cushioning property of the gas seal member.
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
はフェルトとは、アルミナシリカ繊維、炭化珪素繊維、
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
であればよいが、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
い。また、その組成としてはアルミナ 40〜95wt％、シ
リカ ５〜60wt％ものが好ましい。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
であるが、アルミナ分を多くし過ぎると繊維が脆くなっ
てくるためである。また、ガスシール部材のクッション
性、機械的強度を考慮すると、繊維長50mm以上、繊維径
５μｍ以下の繊維からなる、かさ密度0.15〜0.40g/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い。The sheet or felt made of heat-resistant inorganic fiber used in the present invention means alumina silica fiber, silicon carbide fiber,
It may be made of a heat-resistant inorganic fiber such as silicon nitride fiber, but from the viewpoint of cost, the alumina-silica fiber currently used in a wide range of applications is most preferable. The composition is preferably 40 to 95 wt% alumina and 5 to 60 wt% silica. The reason is that, considering heat resistance, it is preferable to increase the alumina content, but if the alumina content is too high, the fiber becomes brittle. Considering the cushioning property and mechanical strength of the gas seal member, rare earth metal oxidation is performed by using a sheet or felt made of fibers having a fiber length of 50 mm or more and a fiber diameter of 5 μm or less and having a bulk density of about 0.15 to 0.40 g / cc. It is preferable to carry an object.
実 施 例 以下、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る。Example Hereinafter, a method for manufacturing a gas seal member according to an example of the present invention will be described.
（実施例１） アルミナ 70wt％、シリカ 30wt％、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6m
mのフェルト（かさ密度 0.18g/cc）に0.2モルの硝酸セ
リウム水溶液を含浸後、80℃で１時間乾燥後、500℃で3
0分間熱処理し、酸化セリウムを22wt％分散担持させ
た。その後、このガスシール部材を塩化白金酸の水溶液
に浸漬し、乾燥、熱処理を行い、白金を0.1wt％担持さ
せた。(Example 1) 70 wt% alumina, 30 wt% silica, fiber length about 50 mm,
6m thickness made of alumina-silica fiber with fiber diameter of about 3μm
m felt (bulk density 0.18 g / cc) was impregnated with 0.2 mol of cerium nitrate aqueous solution, dried at 80 ° C for 1 hour, and then at 500 ° C for 3 hours.
Heat treatment was carried out for 0 minutes to carry 22% by weight of cerium oxide dispersed and supported. Then, this gas sealing member was immersed in an aqueous solution of chloroplatinic acid, dried and heat-treated to support 0.1 wt% of platinum.
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のノズルを設け測定す
ることにより評価した。触媒燃焼装置は触媒体１は6kca
l・h/cm2の燃焼負荷をかけ、触媒体１を約800℃に設定
し、ガス濃度を測定した。なお、３は前記触媒体１を保
持する枠体、４は燃料ガス供給部、５は送風機、６は予
混合気室、７は排出部である。The gas seal member 2 obtained in this example uses a catalytic combustion apparatus as shown in FIG. 1, and measures the HC gas concentration at the seal portion by providing a 2 mmφ nozzle 1 cm away from the seal portion. evaluated. The catalytic burner has a catalyst body 1 of 6 kca.
A catalytic load of l · h / cm 2 was applied, the temperature of the catalyst body 1 was set to about 800 ° C., and the gas concentration was measured. In addition, 3 is a frame body that holds the catalyst body 1, 4 is a fuel gas supply unit, 5 is a blower, 6 is a premixed air chamber, and 7 is a discharge unit.
また、ガスシール部材寿命試験として上記燃焼状態を１
時間続けた後、消火し、30分間冷却する工程を１サイク
ルとし、1000サイクル後に再度上記燃焼状態でのガスシ
ール性を評価した。In addition, as a gas seal member life test, the above combustion state was set to 1
After continuing for a period of time, the process of extinguishing the fire and cooling for 30 minutes was defined as one cycle, and after 1000 cycles, the gas sealing property in the above combustion state was evaluated again.
（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6mm
のフェルトをガスシール部材とした。(Comparative Example 1) The thickness of the alumina-silica fiber in Example 1 is 6 mm.
The felt was used as a gas seal member.
（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
し、乾燥、熱処理を行い、白金を0.1wt％担持させたも
のをガスシール部材とした。(Comparative Example 2) The gas sealing member of Comparative Example 1 was immersed in an aqueous solution of chloroplatinic acid, dried, and heat-treated to carry 0.1 wt% of platinum to obtain a gas sealing member.
比較例１、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た。The sealing properties of the gas sealing members obtained in Comparative Examples 1 and 2 were also measured under the same conditions as in Example 1.
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。Table 1 shows the results of Example 1 and Comparative Examples 1 and 2 at the initial stage and after 1000 cycles.
この結果、本実施例のガスシール部材２は優れたガスシ
ール性を示している。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が、その後に熱劣化が進
み、シール部材に担持された触媒金属が浄化効果を発揮
できなくなった。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た。 As a result, the gas seal member 2 of this example shows excellent gas sealability. In Comparative Example 2, the gas sealing property was excellent at the initial stage, but after that, the thermal deterioration proceeded, and the catalytic metal carried on the sealing member could not exhibit the purifying effect. Further, in Comparative Example 1, it was not possible to sufficiently seal the gas from the beginning.
なお、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め、次の実施例
２では硝酸セリウム水溶液の凍結、真空乾燥を行った。As a result of analyzing the dispersed state of cerium oxide in the cross-sectional direction of a thickness of 6 mm with respect to the gas seal member 2 of this example, it was found that there was considerable uneven loading as shown in FIG. 2 (A). Therefore, in order to improve the unevenness of carrying, in the following Example 2, the cerium nitrate aqueous solution was frozen and vacuum dried.
（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、−80℃で凍
結、真空乾燥を行った後、500℃で30分間熱処理し、酸
化セリウムを分散担持させた。その後、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
理を行い、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た。(Example 2) 0.03 was added to the alumina-silica fiber felt used in Example 1.
After impregnating with ˜0.8 mol of cerium nitrate aqueous solution, it was frozen at −80 ° C., vacuum dried, and then heat-treated at 500 ° C. for 30 minutes to disperse and carry cerium oxide. Then, each gas sealing member was immersed in an aqueous solution of chloroplatinic acid, dried and heat-treated to support 0.1 wt% of platinum. The sealing properties of the obtained eight types of gas seal members (Examples 2-1 to 8) were measured under the same conditions as in Example 1.
また、ガスシール部材のクッション性（復元性）につい
ては、部材を1cm2に切出し、プレスで10kg/cm2の荷重を
かけた後の復元率で評価した。Also, the cushioning of the gas sealing member (resilient), cut member 1 cm 2, was evaluated at recovery rate after a load of 10 kg / cm 2 with a press.
それらの結果を第２表に示す。 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た。すなわ
ち、硝酸セリウム水溶液をフェルトに含浸後、凍結乾
燥、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。FIG. 2B shows the result of analysis of the dispersed state of cerium oxide in the cross-sectional direction having a thickness of 6 mm with respect to the gas seal member of Example 2-5. As a result, it was found that in Examples 2-5, the unevenness in carrying was improved as compared with Example 1. That is, the cerium oxide was uniformly dispersed and carried by performing freeze-drying and thermal decomposition after impregnating the felt with the cerium nitrate aqueous solution.
（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後、
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）を得、シール性も同様な条件
で測定した。それらの結果を第３表に示す。 Example 3 After impregnating an alumina-silica fiber felt having a bulk density of 0.29 g / cc and a thickness of 6 mm with 0.03 to 0.5 mol of an aqueous cerium nitrate solution,
Freeze-drying treatment was performed in the same manner as in Example 2 to obtain seven types of gas seal members (Examples 3-1 to 7), and the sealing property was also measured under the same conditions. The results are shown in Table 3.
（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後、
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）を得、シール性も同様な条件
で測定した。それらの結果を第４表に示す。 Example 4 An alumina-silica fiber felt having a bulk density of 0.40 g / cc and a thickness of 6 mm was impregnated with 0.03 to 0.4 mol of an aqueous cerium nitrate solution, and
Freeze-drying treatment was carried out in the same manner as in Example 2 to obtain 6 types of gas seal members (Examples 4-1 to 6), and the sealing property was also measured under the same conditions. The results are shown in Table 4.
第２表、第３表、第４表の結果から、ガスシール部材
は、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2m2/g以上の時、優れたシール性を示すことがわ
かった。 From the results of Table 2, Table 3 and Table 4, it was found that the gas seal member exhibits excellent sealing property when the cerium oxide is supported on the alumina silica fiber and the specific surface area is 2 m 2 / g or more. .
しかし、担持する酸化セリウムが多くなってくると、ガ
スシール部材のクッション性（復元性）は急激に悪くな
り、触媒燃焼装置で燃焼、消火を繰り返した時、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
にもかかわらず、寿命試験後にはガス漏れが生じてしま
った。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0.15〜0.50g/ccの範囲にするのが好ましい。However, when the amount of cerium oxide carried increases, the cushioning property (restoring property) of the gas seal member deteriorates sharply, and when combustion and extinguishing are repeated in the catalyst combustion device, the catalyst body and the seal member or the seal member are A gap was easily formed between the frame and the frame, and although the performance was excellent at the initial stage, gas leakage occurred 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.
発明の効果 本発明によれば、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
る。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い。Effects of the Invention According to the present invention, it is possible to completely prevent unburned components leaking from the gas seal member in the gap between the catalyst body and the frame body holding the catalyst body. In particular, the effect of the present invention is remarkable in a catalytic combustion device in which gas contains a high concentration of unburned components.
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
浄化される。Further, compared to the conventional case, the unburned component that has infiltrated the member is burned and purified by the action of the catalyst carried on the gas seal member without paying attention to the airtightness between the catalyst member and the frame holding it. To be done.
第１図は本発明の一実施例におけるガスシール部材を評
価するための触媒燃焼装置を示す縦断側面図、第２図は
それぞれ実施例１、実施例２−３のシール部材厚み方向
断面における酸化セリウム分散状態を分析した図であ
る。 １……触媒体、２……ガスシール部材、３……枠体。FIG. 1 is a vertical cross-sectional side view showing a catalytic combustion device for evaluating a gas seal member according to an embodiment of the present invention, and FIG. 2 is an oxidation in a seal member thickness direction cross section of Embodiment 1 and Embodiment 2-3, respectively. It is the figure which analyzed the cerium dispersion state. 1 ... Catalyst body, 2 ... Gas seal member, 3 ... Frame body.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小野 之良 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 (56)参考文献 特公 平７−17897（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Norayoshi Ono, 1006, Kadoma, Kadoma City, Osaka Prefecture, Matsushita Electric Industrial Co., Ltd. (56) References: Japanese Patent Publication 7-17897 (JP, B2)
Claims (3)
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。1. A sheet or felt made of heat-resistant inorganic fibers is impregnated with a water-soluble rare earth metal salt solution, dried and pyrolyzed to disperse and carry a rare earth metal oxide in the sheet or felt. A method of manufacturing a gas seal member, comprising supporting a platinum group metal on a felt.
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。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.
A method for producing a gas seal member, which comprises thermally decomposing and carrying a rare earth metal oxide dispersed and supported in a sheet or felt, and then carrying a platinum group metal on the sheet or felt.
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 production of a 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. 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 JPH0364390A (en) | 1991-03-19 |
| JPH07119401B2 true 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) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE213257T1 (en) * | 1993-03-31 | 2002-02-15 | Rhodia Chimie Sa | METHOD FOR PRODUCING AQUEOUS EMULSIONS OF OILS AND/OR RUBBER AND/OR PREFERABLY MASKED (POLY)ISOCYANATE RESINS, AND RESULTING EMULSIONS |
| KR102663415B1 (en) * | 2018-11-08 | 2024-05-07 | 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
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0364390A (en) | 1991-03-19 |
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