JP2005185969A - 高耐熱性触媒及びその製造方法 - Google Patents
高耐熱性触媒及びその製造方法 Download PDFInfo
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- JP2005185969A JP2005185969A JP2003431009A JP2003431009A JP2005185969A JP 2005185969 A JP2005185969 A JP 2005185969A JP 2003431009 A JP2003431009 A JP 2003431009A JP 2003431009 A JP2003431009 A JP 2003431009A JP 2005185969 A JP2005185969 A JP 2005185969A
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- 150000003624 transition metals Chemical class 0.000 claims description 14
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- 230000035484 reaction time Effects 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- SONJTKJMTWTJCT-UHFFFAOYSA-K rhodium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Rh+3] SONJTKJMTWTJCT-UHFFFAOYSA-K 0.000 description 1
- GTCKPGDAPXUISX-UHFFFAOYSA-N ruthenium(3+);trinitrate Chemical compound [Ru+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O GTCKPGDAPXUISX-UHFFFAOYSA-N 0.000 description 1
- YBCAZPLXEGKKFM-UHFFFAOYSA-K ruthenium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Ru+3] YBCAZPLXEGKKFM-UHFFFAOYSA-K 0.000 description 1
- 239000010944 silver (metal) Substances 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 235000011083 sodium citrates Nutrition 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- DHQIJSYTNIUZRY-UHFFFAOYSA-M sodium;2,3-di(nonyl)naphthalene-1-sulfonate Chemical compound [Na+].C1=CC=C2C(S([O-])(=O)=O)=C(CCCCCCCCC)C(CCCCCCCCC)=CC2=C1 DHQIJSYTNIUZRY-UHFFFAOYSA-M 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- WBKJPJYWZAGQKL-UHFFFAOYSA-M tributyl(octadecyl)azanium;formate Chemical compound [O-]C=O.CCCCCCCCCCCCCCCCCC[N+](CCCC)(CCCC)CCCC WBKJPJYWZAGQKL-UHFFFAOYSA-M 0.000 description 1
- DQYBHCRUGXGVNS-UHFFFAOYSA-M tributyl(pentyl)azanium;iodide Chemical compound [I-].CCCCC[N+](CCCC)(CCCC)CCCC DQYBHCRUGXGVNS-UHFFFAOYSA-M 0.000 description 1
- PDSVZUAJOIQXRK-UHFFFAOYSA-N trimethyl(octadecyl)azanium Chemical compound CCCCCCCCCCCCCCCCCC[N+](C)(C)C PDSVZUAJOIQXRK-UHFFFAOYSA-N 0.000 description 1
- 239000011720 vitamin B Substances 0.000 description 1
- 235000019156 vitamin B Nutrition 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 229940105125 zinc myristate Drugs 0.000 description 1
- NVKSAUAQUPYOPO-UHFFFAOYSA-L zinc;decanoate Chemical compound [Zn+2].CCCCCCCCCC([O-])=O.CCCCCCCCCC([O-])=O NVKSAUAQUPYOPO-UHFFFAOYSA-L 0.000 description 1
- GBFLQPIIIRJQLU-UHFFFAOYSA-L zinc;tetradecanoate Chemical compound [Zn+2].CCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCC([O-])=O GBFLQPIIIRJQLU-UHFFFAOYSA-L 0.000 description 1
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
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- B01J37/16—Reducing
Abstract
【解決手段】同一の基材上に、貴金属8と助触媒成分である金属化合物9とを含有する複合微粒子10が担持され、貴金属8の一部又は全部が、金属化合物9の一部又は全部が還元された金属の状態で接するか、あるいは、貴金属8の一部又は全部が、金属化合物9の酸化物の状態で接するかの少なくともいずれかの状態であることを特徴とする。
【選択図】図1
Description
実施例1は、図2に示すアルミニウムイソプロポキシド(Al-isoP)包接による共還元を使用して触媒粉末を作製した。
実施例1の工程11の水素化ホウ素ナトリウムに変えてヒドラジンを0.16g加えた以外は実施例1と同様の方法を用いて、実施例2の触媒粉末を作製した。得られた触媒粉末500gを使用して、実施例1の方法と同様にハニカム担体上にコートし、実施例2の触媒を得た。
実施例3は、図3に示す硝酸Al包接による共還元を使用して触媒粉末を作製した。
実施例4は、Al2O3に含浸する方法を用いて触媒粉末を作製した。
実施例5は、図3に示す硝酸Al包接による共還元を使用して、Ceを後添加して触媒粉末を作製した。
実施例6は、図2に示すアルミニウムイソプロポキシド(Al-isoP)包接により、Pt-Co-Ce共還元して、触媒粉末を作製した。
実施例7は、図2に示すアルミニウムイソプロポキシド(Al-isoP)包接により、Pt-Rh-Co共還元して、触媒粉末を作製した。
実施例8は、実施例1と同様の方法を用いて触媒を作製し、実施例1の工程10において、硝酸コバルト6水和物に変えて硝酸鉄9水和物をAl2O3への担持濃度が5wt%となるよう加えて、触媒粉末を得た。得られた触媒粉末50gを使用して、ハニカム担体上にコートし、実施例8の触媒を得た。
実施例9は、実施例1と同様の方法を用いて触媒を作製し、実施例1の工程10において、硝酸コバルト6水和物に変えて硝酸ニッケル6水和物をAl2O3への担持濃度が5wt%となるよう加えて、触媒粉末を得た。上記の操作を繰り返し得られた触媒粉末50gを使用して、ハニカム担体上にコートし、実施例9の触媒を得た。
実施例10は、実施例1と同様の方法を用いて触媒を作製し、実施例1の工程10において、ジニトロジアミンPt硝酸酸性水溶液に変えて硝酸パラジウム水溶液をAl2O3への担持濃度が3wt%となるよう加えると共に、硝酸コバルト6水和物に変えて硝酸酸化ランタン6水和物をAl2O3への担持濃度が5wt%になるよう変えて、触媒粉末を得た。上記の操作を繰り返し得られた触媒粉末50gを使用して、ハニカム担体上にコートし、実施例10の触媒を得た。
実施例11は、実施例1と同様の方法を用いて触媒を作製し、実施例1の工程10において、ジニトロジアミンPt硝酸酸性水溶液に変えて硝酸ロジウム水溶液をAl2O3への担持濃度が3wt%となるよう加えると共に、硝酸コバルト6水和物に変えて硝酸酸化ジルコニウム(IV)水和物をAl2O3への担持濃度が5wt%になるよう変えて、触媒粉末を得た。上記の操作を繰り返し得られた触媒粉末50gを使用して、ハニカム担体上にコートし、実施例11の触媒を得た。
実施例12は、実施例1と同様の方法を用いて触媒を作製し、実施例1の工程10において、ジニトロジアミンPt硝酸酸性水溶液をAl2O3への担持濃度が0.5wt%となるよう加えて、触媒粉末を得た。上記の操作を繰り返し得られた触媒粉末50gを使用して、ハニカム担体上にコートし、実施例12の触媒を得た。
比較例1は、実施例1と同様の方法を用いて、助触媒成分を加えず貴金属のみとした触媒を作製した。
比較例2は、図4に示すアルミニウムイソプロポキシド(Al-isoP)包接による共還元を使用して、貴金属Ptを還元した後に助触媒成分であるCoを還元する別還元により触媒を作製した。
比較例3は、Al2O3に含浸する方法を用いて、Coの含浸後にPtを含浸して触媒粉末を作製した。
2…界面活性剤,
3…油相,
4…水相,
5…貴金属前駆体,
6…助触媒成分の金属前駆体,
7…ミセル,
8…貴金属,
9…金属化合物,
10…複合微粒子,
Claims (15)
- 同一の基材上に、貴金属と助触媒成分である金属化合物とを含有する複合微粒子が担持され、前記貴金属の一部又は全部が、金属化合物の一部又は全部が還元された金属の状態で接するか、あるいは、前記貴金属の一部又は全部が、金属化合物の酸化物の状態で接するかの少なくともいずれかの状態であることを特徴とする高耐熱性触媒。
- 前記一部又は全部が還元された金属の状態で接する金属化合物は、遷移金属化合物であることを特徴とする請求項1記載の高耐熱性触媒。
- 前記一部又は全部が酸化物の状態で接する金属化合物は、希土類元素化合物またはZrを含む化合物のいずれかであることを特徴とする請求項1記載の高耐熱性触媒。
- 前記基材は、多孔質酸化物から形成され、前記多孔質酸化物の表面又は内部に前記複合微粒子を担持していることを特徴とする請求項1記載の高耐熱性触媒。
- 前記多孔質酸化物は、アルミナ、酸化セリウム、酸化チタン、ジルコニア及びシリカの中から選択される少なくとも一種以上から形成されることを特徴とする請求項4記載の高耐熱性触媒。
- 前記貴金属は、Ru、Rh、Pd、Ag、Ir、Pt、Auの中から選択される少なくとも一種以上の金属であることを特徴とする請求項1記載の高耐熱性触媒。
- 前記遷移金属化合物中の遷移金属は、Fe、Co、Ni、Cu 、Ti、Wの中から選択される少なくとも一種以上の金属であることを特徴とする請求項1又は2記載の高耐熱性触媒。
- 逆ミセル法を用いて調整したミセル内部に少なくとも一種以上の貴金属塩水溶液と、少なくとも一種以上の助触媒成分である金属塩水溶液とを同時に存在させる逆ミセル溶液調整工程と、
前記ミセル内部に、貴金属と助触媒成分である金属化合物との複合微粒子を形成する複合微粒子形成工程と、
前記複合微粒子を基材上に担持する担持工程と、を含むことを特徴とする高耐熱性触媒の製造方法。 - 前記複合微粒子形成工程は、前記ミセル内部の貴金属塩水溶液と遷移金属塩水溶液とを還元剤を用いて同時に還元して前記複合微粒子を形成するものであることを特徴とする請求項8記載の高耐熱性触媒の製造方法。
- 前記担持工程は、前記基材を形成する多孔質酸化物の前駆体となるアルコキシドの加水分解物を前記ミセル内部に混合し、得られた混合物を焼成した後、前記多孔質酸化物の表面又は内部に前記複合微粒子を担持することを特徴とする請求項8記載の高耐熱性触媒の製造方法。
- 前記担持工程は、前記基材を形成する多孔質酸化物の前駆体塩水溶液と多孔質酸化物の前駆体塩を水酸化物として沈殿又は不溶化させる沈殿剤又は不溶化剤を前記ミセル内部に混合し、その後、焼成して、多孔質酸化物の表面又は内部に前記複合微粒子を担持することを特徴とする請求項8記載の高耐熱性触媒の製造方法。
- 前記担持工程は、前記基材を形成する多孔質酸化物粉末を、前記複合微粒子をミセル内に含む逆ミセル溶液中に分散した後焼成し、多孔質酸化物の表面又は内部に前記複合微粒子を担持することを特徴とする請求項8記載の高耐熱性触媒の製造方法。
- 前記貴金属塩水溶液として、Ru、Rh、Pd、Ag、Ir、Pt及びAuの中から選択される少なくとも一種以上を含有する貴金属塩水溶液を使用することを特徴とする請求項8又は9記載の高耐熱性触媒の製造方法。
- 前記助触媒成分である金属化合物として、Fe、Co、Ni、Cu、Ce、Zr、La、Ti、Wの中から選択される少なくとも一種以上の金属を含有する化合物を使用することを特徴とする請求項8又は9記載の高耐熱性触媒の製造方法。
- 前記基材を形成する多孔質酸化物として、アルミナ、酸化セリウム、酸化チタン、ジルコニア及びシリカの中から選択される少なくとも一種以上の酸化物を使用することを特徴とする請求項10乃至12のいずれか1項に記載の高耐熱性触媒の製造方法。
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Also Published As
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EP1715950A1 (en) | 2006-11-02 |
WO2005063391A1 (en) | 2005-07-14 |
US20070167319A1 (en) | 2007-07-19 |
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