JPWO2007026803A1 - ハニカム構造体及びハニカム触媒体 - Google Patents
ハニカム構造体及びハニカム触媒体Info
- Publication number
- JPWO2007026803A1 JPWO2007026803A1 JP2007533314A JP2007533314A JPWO2007026803A1 JP WO2007026803 A1 JPWO2007026803 A1 JP WO2007026803A1 JP 2007533314 A JP2007533314 A JP 2007533314A JP 2007533314 A JP2007533314 A JP 2007533314A JP WO2007026803 A1 JPWO2007026803 A1 JP WO2007026803A1
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb
- honeycomb structure
- cells
- catalyst body
- catalyst
- 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.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 235
- 238000005192 partition Methods 0.000 claims abstract description 140
- 239000011148 porous material Substances 0.000 claims abstract description 74
- 238000000746 purification Methods 0.000 claims abstract description 49
- 230000035699 permeability Effects 0.000 claims abstract description 46
- 238000009826 distribution Methods 0.000 claims description 25
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 19
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 12
- 229910000510 noble metal Inorganic materials 0.000 claims description 11
- 229910052697 platinum Inorganic materials 0.000 claims description 11
- 229910052703 rhodium Inorganic materials 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 9
- 229910052878 cordierite Inorganic materials 0.000 claims description 7
- 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 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- 229910052763 palladium Inorganic materials 0.000 claims description 6
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- 229910052783 alkali metal Inorganic materials 0.000 claims description 4
- 150000001340 alkali metals Chemical class 0.000 claims description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 4
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 4
- 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 claims description 4
- 229910052863 mullite Inorganic materials 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910021536 Zeolite Inorganic materials 0.000 claims description 3
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical class O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical class O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- -1 sialon Chemical compound 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Chemical class 0.000 claims description 3
- 229910001930 tungsten oxide Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical class [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 claims description 3
- 239000010457 zeolite Substances 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical class [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- 229910000166 zirconium phosphate Inorganic materials 0.000 claims description 2
- LEHFSLREWWMLPU-UHFFFAOYSA-B zirconium(4+);tetraphosphate Chemical compound [Zr+4].[Zr+4].[Zr+4].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LEHFSLREWWMLPU-UHFFFAOYSA-B 0.000 claims description 2
- 239000010970 precious metal Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 56
- 239000010410 layer Substances 0.000 description 33
- 230000000052 comparative effect Effects 0.000 description 16
- 238000000034 method Methods 0.000 description 14
- 239000003795 chemical substances by application Substances 0.000 description 11
- 229930195733 hydrocarbon Natural products 0.000 description 11
- 150000002430 hydrocarbons Chemical class 0.000 description 11
- 230000000149 penetrating effect Effects 0.000 description 10
- 239000004215 Carbon black (E152) Substances 0.000 description 9
- 239000010948 rhodium Substances 0.000 description 9
- 239000002002 slurry Substances 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000010419 fine particle Substances 0.000 description 7
- 230000035515 penetration Effects 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000010191 image analysis Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 230000023402 cell communication Effects 0.000 description 4
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 4
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 3
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000005995 Aluminium silicate Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011802 pulverized particle Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
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Abstract
Description
◎:問題無し、良好
○:若干の目詰まりがあるが、実使用可能
×:目詰まりにより実使用不可能
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12〜25質量部、及び合成樹脂を5〜15質量部を添加した。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、ハニカム焼成体を得た。得られたハニカム焼成体のセルのいずれかの端部に、市松模様状となるように目封止剤を詰めて再度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、直径144mm、全長152mmのハニカム構造体(実施例1〜17、比較例1〜3)を作製した。なお、隔壁の細孔構造は、コージェライト化原料の化学組成、造孔剤の粒子径、造孔剤の添加量等を適宜調整することにより調整した。また、目封止部の目封止深さは、端面から10mmであった。
貴金属として白金(Pt)を含有し、活性アルミナ、及び酸素吸蔵剤としてのセリアを更に含有する触媒スラリーを調製した。吸引法により、実施例1〜17、及び比較例1〜3のハニカム構造体の隔壁内表面、及び細孔内表面に、調製した触媒スラリーのコート層を形成した。次いで、加熱乾燥することにより、表2に示す隔壁(触媒層つき)の細孔構造を有するハニカム触媒体(実施例18〜34、比較例4〜6)を作製した。なお、ハニカム構造体(担体)1リットルあたりの貴金属(Pt)の量は2gであった。また、ハニカム構造体(担体)1リットルあたりの触媒スラリーのコート量は100gであった。
表1〜3に示すように、実施例1〜17のハニカム構造体を用いて作製した実施例18〜34のハニカム触媒体は、比較例4〜6のハニカム触媒体に比して、浄化指数が高く、優れた浄化性能を示すものであることが明らかである。また、実施例18〜34のハニカム触媒体は、比較例4,5のハニカム触媒体と比較した場合に、圧損上昇がなく、圧損増加率が低く、更には長期耐目詰まりについても良好であることが明らかである。
上記実施例1の場合と同様にしてハニカム焼成体を作製した。得られたハニカム焼成体の一部のセルを貫通セルとし、残余のセルの片方の端面(ガス入口側の端面)に目封止剤を詰めて再度焼成することにより、図13に示すハニカム構造体71のような構造のハニカム構造体を、貫通セルの比率を変えて4種類得た。貫通セルの比率(%)はそれぞれ、実施例35:35%、実施例36:45%、実施例37:55%、実施例38:20%とした。得られたそれぞれのハニカム構造体は、直径105.7mm、長さ114.2mm(体積1リットル)で、隔壁厚さ8mil(0.203mm)、セル密度300セル/平方インチ(46.5セル/平方センチメートル)、隔壁の画像最大距離平均40μm、隔壁の気孔率60%のコージェライト製ハニカム構造体であった。
ガンマアルミナ及びセリアの混合物(比表面積50m2/g、初期解砕粒子径50μm)をボールミルにて湿式解砕し、平均解砕粒子径5μmにした。得られた解砕粒子を、白金及びロジウムを含む溶液と混合し、ガンマアルミナの微細孔内に白金及びロジウムを担持した。これにより、白金及びロジウムが担持された平均解砕粒子径5μmのガンマアルミナを含有する触媒スラリーを得た。
セル密度600cpsi(93個/cm2)、隔壁厚さ4.5mil(0.1143mm)の単純ハニカム構造体(目封じ無し)に触媒を担持したもの(図4〜6)を用いた場合を比較対照とした場合の浄化率に対する相対比率であり、単位は無次元である。
実施例55のハニカム触媒体(比較対照用)に対する相対比であり、無次元である。
目封止剤を詰める位置(目封止部の位置)と、貫通セルの比率を変化させた以外は、実施例35の場合と同様にして4種類のハニカム構造体を得た。得られたハニカム構造体は、図14に示すハニカム構造体81のように、一部のセル3が貫通セル3aとなり、残余のセル3が片方の端面2b(ガス出口側の端面)に目封止部10が配置されたセルとなっている。貫通セルの比率はそれぞれ、実施例39:35%、実施例40:45%、実施例41:55%、実施例42:20%とした。
目封止剤を詰める位置(目封止部の位置)と、貫通セルの比率を変化させた以外は、実施例35の場合と同様にして4種類のハニカム構造体を得た。得られたハニカム構造体は、図11に示すハニカム構造体51のように、一部のセル3が貫通セル3aであり、残余のセル3の端面2a又は端面2bに目封止部10が配置された構造となっている。貫通セルの比率はそれぞれ、実施例43:35%、実施例44:45%、実施例45:55%、実施例46:20%とした。
目封止剤を詰める位置(目封止部の位置)と、貫通セルの比率を変化させた以外は、実施例35の場合と同様にして4種類のハニカム構造体を得た。得られたハニカム構造体は、図12に示すハニカム構造体61のように、一部のセル3が貫通セル3aであり、残余のセル3の内部に目封止部10が同じ位置に並ぶように配置された構造となっている。貫通セルの比率はそれぞれ、実施例47:35%、実施例48:45%、実施例49:55%、実施例50:20%とした。
目封止剤を詰める位置(目封止部の位置)と、貫通セルの比率を変化させた以外は、実施例35の場合と同様にして4種類のハニカム構造体を得た。得られたハニカム構造体は、図8に示すハニカム構造体31のように、一部のセル3が貫通セル3aであり、残余のセル3が、軸方向の位置をずらして配置された目封止部10を内部に有するセル構造となっている。貫通セルの比率はそれぞれ、実施例51:35%、実施例52:45%、実施例53:55%、実施例54:20%とした。
目封止剤を詰める位置(目封止部の位置)と、貫通セルの比率を変化させた以外は、実施例35の場合と同様にしてハニカム構造体を得た。得られたハニカム構造体は、図2に示すハニカム構造体1のように、貫通セルがなく、全てのセル3が、端面2a又は端面2bに目封止部10を有することにより各端面に市松模様が形成された構造となっている。
表4に示すように、実施例35〜38のハニカム触媒体においては、貫通セル比率が高いほど圧力損失が低くなっていることが分かる。これら4つの実施例の中では、貫通セル比率20%の実施例38の圧力損失が特に大きくなっていることが分かる。また、目封止部の配置の異なる他の実施例についても、貫通セル比率と圧力損失との関係については同様の結果が得られている。
実施例18のハニカム触媒体を製造した方法と同様の方法で、表2に示す隔壁(触媒層つき)の細孔構造を有するハニカム触媒体(実施例56〜61)を作製した。
実施例18のハニカム触媒体を製造した方法と同様の方法で、表7に示す隔壁(触媒層つき)の細孔構造を有するハニカム触媒体(実施例61,62、比較例7,8)を作製した。
Claims (24)
- 二つの端面間を連通する複数のセルが形成されるように配置された、多数の細孔を有する多孔質の隔壁と、
前記セルを、いずれかの前記端面又は前記セルの内部において目封止するように配置された目封止部と、を備えたハニカム構造体であって、
前記隔壁のパーミアビリティーが、7×10−12〜4×10−8m2であるハニカム構造体。 - セル水力直径(m)と、前記隔壁のパーミアビリティー(m2)が、
(セル水力直径)2/(パーミアビリティー)=2×103以上、6×105未満、の関係を満たす請求項1に記載のハニカム構造体。 - 画像最大距離平均が250μmを超えて、500μm以下である請求項1又は2に記載のハニカム構造体。
- 前記セルの密度が4〜46.5個/cm2、
前記隔壁の、厚さが0.3〜0.43mm、画像最大距離平均が250〜500μm、気孔率が40〜65%である請求項1又は2に記載のハニカム構造体。 - 前記セルの密度が0.25〜46.5個/cm2、
前記隔壁の、厚さが0.15〜7mm、画像最大距離平均が40〜3000μm、気孔率が30〜80%、及び細孔径分布の常用対数標準偏差が0.1〜0.6である請求項1又は2に記載のハニカム構造体。 - 前記セルの密度が1.55〜15.5個/cm2、
前記隔壁の、厚さが0.4〜2mm、画像最大距離平均が50〜500μm、気孔率が40〜65%、及び細孔径分布の常用対数標準偏差が0.2〜0.6である請求項1又は2に記載のハニカム構造体。 - 前記セルの密度が1.55〜12.4個/cm2、
前記隔壁の、厚さが0.7〜1.5mm、画像最大距離平均が250μmを超えて500μm以下、気孔率が40〜65%、及び細孔径分布の常用対数標準偏差が0.2〜0.6である請求項1又は2に記載のハニカム構造体。 - 前記セルの30〜90%が、前記目封止部が配置されていない貫通セルである請求項1〜7のいずれか一項に記載のハニカム構造体。
- 前記セルの30〜50%が、前記目封止部が配置されていない貫通セルである請求項1〜7のいずれか一項に記載のハニカム構造体。
- セラミックスを主成分とする材料、又は焼結金属からなる請求項1〜9のいずれか一項に記載のハニカム構造体。
- 前記セラミックスが、炭化珪素、コージェライト、アルミナタイタネート、サイアロン、ムライト、窒化珪素、リン酸ジルコニウム、ジルコニア、チタニア、アルミナ、及びシリカからなる群より選択される少なくとも一種である請求項10に記載のハニカム構造体。
- 40〜800℃における、前記セルの連通方向の熱膨張係数が、1.0×10−6/℃未満である請求項1〜11のいずれか一項に記載のハニカム構造体。
- 請求項1〜12のいずれか一項に記載のハニカム構造体と、
前記ハニカム構造体の前記隔壁の、少なくとも前記細孔の内表面に層状に担持された、触媒を含有する触媒層と、を備え、
前記ハニカム構造体の前記隔壁に多数の触媒層担持細孔が形成されたハニカム触媒体。 - 前記隔壁のパーミアビリティーが、6.8×10−12〜3×10−8m2である請求項13に記載のハニカム触媒体。
- セル水力直径(m)と、前記隔壁のパーミアビリティー(m2)が、
(セル水力直径)2/(パーミアビリティー)=2×103以上、6×105未満、
の関係を満たす請求項13又は14に記載のハニカム触媒体。 - 前記触媒層が担持された状態における前記隔壁の画像最大距離平均が40〜3000μm、及び気孔率が30〜80%である請求項13〜15のいずれか一項に記載のハニカム触媒体。
- 前記触媒層が担持された状態における前記隔壁の画像最大距離平均が50〜500μm、及び気孔率が40〜65%である請求項13〜15のいずれか一項に記載のハニカム触媒体。
- 前記触媒層が担持された状態における前記隔壁の画像最大距離平均が250μmを超えて500μm以下、及び気孔率が40〜65%である請求項13〜15のいずれか一項に記載のハニカム触媒体。
- 前記触媒が、
活性アルミナからなる担体コートと、
前記担体コートの内部に分散担持される、Pt、Rh、及びPdからなる群より選択される一以上の貴金属と、
前記担体コートに含有される、酸化セリウム、酸化ジルコニア、及びシリカからなる群より選択される一以上の化合物と、
を含むガソリンエンジン排ガス浄化三元触媒である請求項13〜18のいずれか一項に記載のハニカム触媒体。 - 前記触媒が、Pt、Rh、及びPdからなる群より選択される一以上の貴金属を含有する、ガソリンエンジン又はディーゼルエンジン排ガス浄化用の酸化触媒である請求項13〜18のいずれか一項に記載のハニカム触媒体。
- 前記触媒が、金属置換ゼオライト、バナジウム、チタニア、酸化タングステン、銀、及びアルミナからなる群より選択される少なくとも一種を含有する、NOX選択還元用SCR触媒である請求項13〜18のいずれか一項に記載のハニカム触媒体。
- 前記触媒が、アルカリ金属及び/又はアルカリ土類金属を含有するNOX吸蔵触媒である請求項13〜18のいずれか一項に記載のハニカム触媒体。
- 等価直径dと中心軸方向長さLとの比の値(L/d)が、0.3以上、0.75未満である請求項13〜22のいずれか一項に記載のハニカム触媒体。
- 等価直径dと中心軸方向長さLとの比の値(L/d)が、0.3以上、0.75未満であり、
セル密度が4〜46.5個/cm2、
隔壁の、厚さが0.3〜0.43mm、画像最大距離平均が250〜500μm、気孔率が60〜80%、及び細孔径分布の常用対数標準偏差が0.2〜0.6である請求項19〜22のいずれか一項に記載のハニカム触媒体。
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- 2006-08-31 EP EP06797144A patent/EP1920838A4/en not_active Ceased
- 2006-08-31 WO PCT/JP2006/317184 patent/WO2007026803A1/ja active Application Filing
- 2006-08-31 JP JP2007533314A patent/JPWO2007026803A1/ja active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002026351A1 (en) * | 2000-09-29 | 2002-04-04 | Ibiden Co., Ltd. | Catalyst-carrying filter |
JP2003033664A (ja) * | 2001-07-25 | 2003-02-04 | Ngk Insulators Ltd | 排ガス浄化用ハニカム構造体及び排ガス浄化用ハニカム触媒体 |
WO2003082770A1 (fr) * | 2002-03-29 | 2003-10-09 | Ngk Insulators, Ltd. | Matiere poreuse a base de carbure de silicium et son procede de production |
JP2004251137A (ja) * | 2003-02-18 | 2004-09-09 | Ngk Insulators Ltd | ハニカムフィルタ及び排ガス浄化システム |
JP2004261644A (ja) * | 2003-02-18 | 2004-09-24 | Toyota Motor Corp | 排ガス浄化フィルタ触媒用基材 |
Also Published As
Publication number | Publication date |
---|---|
EP1920838A1 (en) | 2008-05-14 |
US20070048494A1 (en) | 2007-03-01 |
US7867598B2 (en) | 2011-01-11 |
EP1920838A4 (en) | 2012-01-25 |
WO2007026803A1 (ja) | 2007-03-08 |
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