JP2009236067A - ハニカム構造体およびそのハニカム構造体からなる触媒体 - Google Patents
ハニカム構造体およびそのハニカム構造体からなる触媒体 Download PDFInfo
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Abstract
【解決手段】多孔質の隔壁によって区画された流体の流路となる複数のセルを有し、所定のセルの一方の端部が当該セル内に充填された封止材からなる封止部により目封止され、残余のセルについては前記所定のセルとは反対側の他方の端部が同様に封止部により目封止されているハニカム構造体であって、隔壁の気孔率が65%以上、平均細孔径が60μm以上であり、かつ、直径の平均値が100〜500μmの複数のピンホールが10〜100個/cm2の密度で形成されたハニカム構造体である。
【選択図】図1
Description
タルク、カオリン、仮焼カオリン、アルミナ、水酸化アルミニウム、及びシリカのうちから複数を組み合わせて、その化学組成が、SiO242〜56質量%、Al2O30〜45質量%、及びMgO12〜16質量%となるように所定の割合で調合されたコージェライト化原料100質量部に対して、造孔剤としてグラファイトを10〜20質量部、及び発泡樹脂を5〜25質量部を添加し、隔壁にピンホール(平均径100〜500μm)を開けるため、造孔材として鉄粉を5〜15質量部を追加した。更に、メチルセルロース類、及び界面活性剤をそれぞれ適当量添加した後、水を加えて混練することにより杯土を調製した。調製した杯土を真空脱気した後、押出成形することによりハニカム成形体を得た。得られたハニカム成形体を乾燥後、最高温度1400〜1430℃の温度範囲で焼成することにより、表1に示す隔壁の細孔構造を有するハニカム構造体を作製した。
セラミック原料および造孔材を適宜調整した以外は実施例1と同様にして、表1に示すハニカム構造体を作製した。
セラミック原料および造孔材を適宜調整し、鉄粉を添加しなかったことを除いて実施例1と同様にして、表1に示す隔壁(触媒層つき)の細孔構造(気孔率、平均細孔径)を有するハニカム触媒体を作製した(比較例1のDPF)。ハニカム構造体(担体)1リットルあたりの貴金属(Pt+Pd)の量は1gであった。
Claims (3)
- 多孔質の隔壁によって区画された流体の流路となる複数のセルを有し、所定のセルの一方の端部が当該セル内に充填された封止材からなる封止部により目封止され、残余のセルについては前記所定のセルとは反対側の他方の端部が同様に封止部により目封止されているハニカム構造体であって、隔壁の気孔率が65%以上、ピンホールを除く隔壁の平均細孔径が60μm以上であり、かつ、直径の平均値が100〜500μmの複数のピンホールが10〜100個/cm2の密度で形成されたハニカム構造体。
- 前記隔壁の厚さが17mil以上であり、前記セルのセルピッチが100cpsi以下である請求項1に記載のハニカム構造体。
- 請求項1または2に記載のハニカム構造体の表面を、HC類およびCO類を浄化する触媒によりコートした触媒体。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5870814A (ja) * | 1981-10-20 | 1983-04-27 | Nippon Soken Inc | 排気ガス浄化用構造物 |
JPS61129015A (ja) * | 1984-11-24 | 1986-06-17 | Nippon Denso Co Ltd | 排出ガス浄化用フイルタおよびその製造方法 |
JP2006029267A (ja) * | 2004-07-20 | 2006-02-02 | Denso Corp | 排気浄化装置 |
JP2007152342A (ja) * | 2005-11-10 | 2007-06-21 | Ngk Insulators Ltd | ハニカム構造体の製造方法 |
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2008
- 2008-03-28 JP JP2008085395A patent/JP5242214B2/ja active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5870814A (ja) * | 1981-10-20 | 1983-04-27 | Nippon Soken Inc | 排気ガス浄化用構造物 |
JPS61129015A (ja) * | 1984-11-24 | 1986-06-17 | Nippon Denso Co Ltd | 排出ガス浄化用フイルタおよびその製造方法 |
JPH0310365B2 (ja) * | 1984-11-24 | 1991-02-13 | Nippon Denso Co | |
JP2006029267A (ja) * | 2004-07-20 | 2006-02-02 | Denso Corp | 排気浄化装置 |
JP2007152342A (ja) * | 2005-11-10 | 2007-06-21 | Ngk Insulators Ltd | ハニカム構造体の製造方法 |
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