JP3275480B2 - Method for manufacturing honeycomb body - Google Patents
Method for manufacturing honeycomb bodyInfo
- Publication number
- JP3275480B2 JP3275480B2 JP26203193A JP26203193A JP3275480B2 JP 3275480 B2 JP3275480 B2 JP 3275480B2 JP 26203193 A JP26203193 A JP 26203193A JP 26203193 A JP26203193 A JP 26203193A JP 3275480 B2 JP3275480 B2 JP 3275480B2
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb body
- type zeolite
- honeycomb
- mordenite
- thermal expansion
- 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 description 5
- 229910021536 Zeolite Inorganic materials 0.000 claims description 13
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 13
- 239000010457 zeolite Substances 0.000 claims description 13
- 229910052680 mordenite Inorganic materials 0.000 claims description 9
- 239000011230 binding agent Substances 0.000 claims description 7
- 239000004927 clay Substances 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000004898 kneading Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims 1
- 239000003054 catalyst Substances 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ディーゼル発電機等の
ディーゼル機関の排気ガス中に含まれる窒素酸化物（Ｎ
Ｏｘ）の除去触媒等に使用されるハニカムの製造方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nitrogen oxide (N) contained in exhaust gas of a diesel engine such as a diesel generator.
The present invention relates to a method for producing a honeycomb used as a catalyst for removing Ox).
【０００２】[0002]
【従来の技術】ディーゼル機関の排ガス中のＮＯｘの除
去は、通常Ｎａ−Ｙ型ゼオライトを脱硝触媒とし、触媒
反応により行なっている。一般に触媒はＮＯｘとの接触
面積が大きくなるようにハニカム体に構成している（図
４）。2. Description of the Related Art The removal of NOx from exhaust gas of a diesel engine is usually carried out by a catalytic reaction using a Na-Y type zeolite as a denitration catalyst. Generally, the catalyst is formed in a honeycomb body so as to increase the contact area with NOx (FIG. 4).
【０００３】このＮａ−Ｙ型ゼオライトを用いたハニカ
ム体は、図５に示すように、Ｎａ−Ｙ型ゼオライトに
水、粘土を１０ｗｔ％（重量％）、有機バインダー１０
ｗｔ％を添加し、混練し、ハニカム押し出し成形後、電
子レンジで約１分加熱乾燥させ、炉で７５０℃、５時間
焼成して作る。なお、有機バインダは焼成時に燃えてな
くなり、ハニカム体は素焼状となる。As shown in FIG. 5, a honeycomb body using this Na—Y type zeolite contains water and clay of 10 wt% (wt%), an organic binder 10
wt%, kneaded, honeycomb extruded, heated and dried in a microwave for about 1 minute, and baked in a furnace at 750 ° C for 5 hours. The organic binder no longer burns during firing, and the honeycomb body is in an unfired state.
【０００４】[0004]
【発明が解決しようとする課題】上記のようにして製造
されたＮａ−Ｙ型ゼオライトを用いたハニカム体は、図
６の曲線Ａで示すように１００〜１５０℃での急激な熱
膨張（線膨張）特性の変化のため、図７に示すように、
焼成時にハニカム体１にクラック３が発生する。ハニカ
ム体にクラックがあると、圧縮強度、脱硝触媒としての
寿命等が低下する。The honeycomb body using the Na-Y type zeolite manufactured as described above has a rapid thermal expansion (linear expansion) at 100 to 150 ° C. as shown by a curve A in FIG. (Expansion) characteristic, as shown in FIG.
Cracks 3 occur in the honeycomb body 1 during firing. If the honeycomb body has cracks, the compressive strength, the life as a denitration catalyst, and the like decrease.
【０００５】本発明は、従来のこのような問題点に鑑み
てなされたものであり、その目的とするところは、焼成
過程でのクラックの発生をなくすことができるハニカム
体の製造方法を提供することにある。The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a method for manufacturing a honeycomb body which can eliminate the occurrence of cracks in a firing process. It is in.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明におけるハニカム体の製造方法は、Ｎａ−Ｙ
型ゼオライトを主成分としこれに無機及び有機バインダ
を加えて混練し、この混練した材料をハニカム状に形成
し、乾燥させた後、焼成するハニカム体の製造方法にお
いて、前記混練する材料を、主成分のＮａ−Ｙ型ゼオラ
イトに対しＨ−モルデナイトを５〜５０ｗｔ％添加する
と共に、無機バインダとして粘土を１〜２５％ｗｔ添加
に構成し、前記焼成を７００〜８５０℃で５〜１０時間
することを特徴とする。In order to achieve the above object, a method for manufacturing a honeycomb body according to the present invention comprises the steps of:
In a method for manufacturing a honeycomb body in which a zeolite is used as a main component, and an inorganic and organic binder is added thereto and kneaded, and the kneaded material is formed into a honeycomb shape, dried, and then fired, the kneading material is mainly used. 5 to 50% by weight of H-mordenite is added to Na-Y type zeolite as a component, and 1 to 25% by weight of clay is added as an inorganic binder, and the calcination is performed at 700 to 850 ° C for 5 to 10 hours. It is characterized by.
【０００７】[0007]
【作用】Ｎａ−Ｙ型ゼオライトに粘土を加えて作ったハ
ニカム体は１００〜１５０℃で急激な熱膨張変化し、ク
ラックが発生するが、Ｎａ−Ｙ型ゼオライトにＨ−モル
デナイトを添加し粘土を加えて作ったハニカム体はＨ−
モルデナイトが添加されたことにより上記１００〜１５
０℃で急激な熱膨張変化に生じない。The honeycomb body made by adding clay to Na-Y type zeolite undergoes a rapid thermal expansion change at 100 to 150 ° C., and cracks are generated. However, clay is added by adding H-mordenite to Na-Y type zeolite. In addition, the honeycomb body made is H-
Due to the addition of mordenite, 100 to 15
No rapid thermal expansion change occurs at 0 ° C.
【０００８】このためＮａ−Ｙ型ゼオライトにＨ−モル
デナイトを添加して作ったハニカム体は、急激な熱膨張
変化が生じないので、クラックの発生がなくなる。For this reason, a honeycomb body made by adding H-mordenite to a Na—Y type zeolite does not undergo a rapid change in thermal expansion, so that cracks are not generated.
【０００９】[0009]
【実施例】図１に示すよう、Ｎａ−Ｙ型ゼオライト６０
ｗｔ％にＨ−モルデナイト２０ｗｔ％を添加し、これに
粘土を１０ｗｔ％、有機バインダ１０ｗｔ％を添加し、
水を加えて混練し、ハニカム押し出し成形し、電子レン
ジで約１分加熱乾燥した後、炉で８００℃、５時間焼成
してハニカム体を製造した。DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG.
H-mordenite 20 wt% is added to wt%, clay 10 wt% and organic binder 10 wt% are added thereto,
Water was added and the mixture was kneaded, extruded from a honeycomb, dried by heating in a microwave for about 1 minute, and then fired in a furnace at 800 ° C. for 5 hours to produce a honeycomb body.
【００１０】この実施例のＮａ−Ｙ型ゼオライト及びＨ
−モルデナイトの粉体には、東ソ−製の表１に示す商品
名と組成のものを使用した。The Na-Y type zeolite of this embodiment and H
The mordenite powder used had a trade name and composition shown in Table 1 manufactured by Tosoh Corporation.
【００１１】[0011]
【表１】 [Table 1]
【００１２】図２に実施例により作られたハニカム体の
熱膨張特性を示す。図２から明らかなように本発明によ
るハニカム体の昇温及び降温時の膨張は曲線Ａ１及びＡ
２のようになり、曲線Ｂ１及びＢ２に示す従来ハニカム
体の熱膨張特性に比し顕著に改善された。FIG. 2 shows the thermal expansion characteristics of the honeycomb body manufactured according to the embodiment. As is clear from FIG. 2, the expansion of the honeycomb body according to the present invention at the time of temperature rise and temperature fall is represented by curves A1 and A2.
2, which is remarkably improved as compared with the thermal expansion characteristics of the conventional honeycomb body shown in curves B1 and B2.
【００１３】図３にハニカム体のＸ線解析チャートを示
す。このＸ線回析により実施例のもの（ｃ）は、Ｎａ−
Ｙ型ゼオライトとＨ−モルデナイドがよく混合されてい
ることが分かる。FIG. 3 shows an X-ray analysis chart of the honeycomb body. As a result of this X-ray diffraction, (c) of Example
It can be seen that the Y-type zeolite and the H-mordenide are well mixed.
【００１４】表２にハニカム体の圧縮強度試験の結果を
示す。この試験結果から実施例によるハニカム体の圧縮
強度は従来のものより著しく向上していることが分か
る。Table 2 shows the results of the compressive strength test of the honeycomb body. From this test result, it can be seen that the compressive strength of the honeycomb body according to the example is significantly improved as compared with the conventional one.
【００１５】[0015]
【表２】 [Table 2]
【００１６】また、実施例のハニカム体の表面を調べた
が、クラックは全く見当らなかった。Further, when the surface of the honeycomb body of the example was examined, no crack was found.
【００１７】[0017]
【発明の効果】本発明は、上述のとおり構成されている
ので、次に記載する効果を奏する。Since the present invention is configured as described above, the following effects can be obtained.
【００１８】（１）Ｎａ−Ｙ型ゼオライトにＨ−モルデ
ナイトを混合したので、熱膨張特性が抑えられハニカム
体に焼成時にクラックが生じない。(1) Since H-mordenite is mixed with the Na-Y type zeolite, the thermal expansion characteristics are suppressed and the honeycomb body does not crack during firing.
【００１９】（２）ハニカム体にクラックが生じないの
で、圧縮強度が向上し、脱硝触媒として長期間使用が可
能となる。(2) Since cracks do not occur in the honeycomb body, the compressive strength is improved, and the honeycomb body can be used for a long time as a denitration catalyst.
【図１】実施例のハニカム体製造工程図。FIG. 1 is a diagram showing a manufacturing process of a honeycomb body according to an embodiment.
【図２】ハニカム体の熱膨張特性曲線図。FIG. 2 is a diagram showing a thermal expansion characteristic curve of a honeycomb body.
【図３】Ｘ線回析チャート。FIG. 3 is an X-ray diffraction chart.
【図４】ハニカム体の正面図。FIG. 4 is a front view of a honeycomb body.
【図５】従来ハニカム体の製造工程図。FIG. 5 is a manufacturing process diagram of a conventional honeycomb body.
【図６】従来例によるハニカム体及びＨ−モルデナイト
を用いたハニカム体の熱膨張特性曲線図。FIG. 6 is a graph showing a thermal expansion characteristic curve of a conventional honeycomb body and a honeycomb body using H-mordenite.
【図７】従来例によるハニカム体の正面図。FIG. 7 is a front view of a honeycomb body according to a conventional example.
１…ハニカム体 ２…孔 ３…クラック 1. Honeycomb body 2. Hole 3. Crack
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−108654（ＪＰ，Ａ) 特開 昭61−171539（ＪＰ，Ａ) 特開 平７−96179（ＪＰ，Ａ) 特開 平７−155613（ＪＰ，Ａ) 特開 昭50−80288（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B01J 21/00 - 37/36 B01D 53/86 ──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A-4-108654 (JP, A) JP-A-61-171539 (JP, A) JP-A-7-96179 (JP, A) JP-A-7-96 155613 (JP, A) JP-A-50-80288 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B01J 21/00-37/36 B01D 53/86
Claims (1)
に無機及び有機バインダを加えて混練し、この混練した
材料をハニカム状に成形し、乾燥させた後、焼成するハ
ニカム体の製造方法において、 前記混練する材料を、主成分のＮａ−Ｙ型ゼオライトに
対し、Ｈ−モルデナイトを５〜５０ｗｔ％添加すると共
に、無機バインダとして粘土を１〜２５ｗｔ％添加して
構成し、 前記焼成を７００〜８５０℃で５〜１０時間することを
特徴としたハニカム体の製造方法。1. A method for producing a honeycomb body comprising a Na-Y type zeolite as a main component, an inorganic and an organic binder added thereto, and kneading, forming the kneaded material into a honeycomb shape, drying, and firing. The material to be kneaded is constituted by adding 5 to 50 wt% of H-mordenite to a Na-Y type zeolite as a main component and adding 1 to 25 wt% of clay as an inorganic binder. A method for producing a honeycomb body, comprising performing at 850 ° C. for 5 to 10 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26203193A JP3275480B2 (en) | 1993-10-20 | 1993-10-20 | Method for manufacturing honeycomb body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26203193A JP3275480B2 (en) | 1993-10-20 | 1993-10-20 | Method for manufacturing honeycomb body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07112133A JPH07112133A (en) | 1995-05-02 |
| JP3275480B2 true JP3275480B2 (en) | 2002-04-15 |
Family
ID=17370071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26203193A Expired - Fee Related JP3275480B2 (en) | 1993-10-20 | 1993-10-20 | Method for manufacturing honeycomb body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3275480B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6685897B1 (en) | 2000-01-06 | 2004-02-03 | The Regents Of The University Of California | Highly-basic large-pore zeolite catalysts for NOx reduction at low temperatures |
| CN101952224B (en) * | 2007-11-30 | 2013-08-21 | 康宁股份有限公司 | Zeolite-based honeycomb body |
| JP2011125845A (en) * | 2009-11-19 | 2011-06-30 | Ibiden Co Ltd | Method of producing honeycomb |
| CN103191722B (en) * | 2013-04-23 | 2015-03-25 | 江苏龙源催化剂有限公司 | Crosslinked montmorillonite honeycomb type denitration catalyst and preparation method thereof |
-
1993
- 1993-10-20 JP JP26203193A patent/JP3275480B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07112133A (en) | 1995-05-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |