JP5880412B2 - 触媒金属粒子の担持方法及び排ガス除去用触媒の製造方法 - Google Patents
触媒金属粒子の担持方法及び排ガス除去用触媒の製造方法 Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims description 109
- 239000002923 metal particle Substances 0.000 title claims description 26
- 238000000034 method Methods 0.000 title claims description 21
- 230000003197 catalytic effect Effects 0.000 title claims description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 94
- 229910052741 iridium Inorganic materials 0.000 claims description 54
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 48
- 229910052763 palladium Inorganic materials 0.000 claims description 39
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 239000000084 colloidal system Substances 0.000 claims description 12
- 239000002243 precursor Substances 0.000 claims description 12
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 10
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 10
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 10
- 238000010992 reflux Methods 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 7
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 6
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 claims description 6
- 239000012696 Pd precursors Substances 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000012298 atmosphere Substances 0.000 description 48
- 230000000052 comparative effect Effects 0.000 description 29
- 238000000746 purification Methods 0.000 description 28
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 23
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 18
- 229910002091 carbon monoxide Inorganic materials 0.000 description 18
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 15
- 239000007789 gas Substances 0.000 description 14
- 239000000243 solution Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- GSNZLGXNWYUHMI-UHFFFAOYSA-N iridium(3+);trinitrate Chemical compound [Ir+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O GSNZLGXNWYUHMI-UHFFFAOYSA-N 0.000 description 7
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 7
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 6
- 239000002131 composite material Substances 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000005275 alloying Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910000510 noble metal Inorganic materials 0.000 description 3
- 229910052703 rhodium Inorganic materials 0.000 description 3
- 239000010948 rhodium Substances 0.000 description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 2
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 2
- 239000002738 chelating agent Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 150000002940 palladium Chemical class 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000004931 aggregating effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000013522 chelant Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 150000002503 iridium Chemical class 0.000 description 1
- KZLHPYLCKHJIMM-UHFFFAOYSA-K iridium(3+);triacetate Chemical compound [Ir+3].CC([O-])=O.CC([O-])=O.CC([O-])=O KZLHPYLCKHJIMM-UHFFFAOYSA-K 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- YJVFFLUZDVXJQI-UHFFFAOYSA-L palladium(ii) acetate Chemical compound [Pd+2].CC([O-])=O.CC([O-])=O YJVFFLUZDVXJQI-UHFFFAOYSA-L 0.000 description 1
- GPNDARIEYHPYAY-UHFFFAOYSA-N palladium(ii) nitrate Chemical compound [Pd+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O GPNDARIEYHPYAY-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- 239000003223 protective agent Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 1
- 238000000629 steam reforming Methods 0.000 description 1
- DANYXEHCMQHDNX-UHFFFAOYSA-K trichloroiridium Chemical compound Cl[Ir](Cl)Cl DANYXEHCMQHDNX-UHFFFAOYSA-K 0.000 description 1
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- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/46—Ruthenium, rhodium, osmium or iridium
- B01J23/468—Iridium
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- B01J37/02—Impregnation, coating or precipitation
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Description
(1)(a)ポリビニルピロリドン、N−メチルピロリドン、N−ビニル−2−ピロリドン及びエチレングリコールから選択される少なくとも1種以上を含有する溶媒に、イリジウムの前駆体及びパラジウムの前駆体を添加する工程、
(b)得られた触媒金属コロイドに還元剤を添加する工程、
(c)得られた溶液を加熱還流させることにより触媒金属粒子を含む濃縮溶液を得る工程、及び
(d)触媒金属粒子を担体に担持する工程を含み、
触媒金属粒子中のイリジウムの含有量が、イリジウム及びパラジウムの総質量に対して3〜10質量%である、触媒金属粒子の担持方法。
(2)触媒金属粒子中のイリジウムの含有量が、イリジウム及びパラジウムの総質量に対して3〜7質量%である、上記(1)に記載の方法。
(3)上記(1)又は(2)に記載の方法により得られる、排ガス除去用触媒。
工程(a)において、イリジウムの前駆体及びパラジウムの前駆体を同一の溶媒に添加して触媒金属コロイドを得、後の工程(c)において同時に還元処理を行う。イリジウムはパラジウムと比較して酸化物を生成しやすく、パラジウムより先に酸化されるため、パラジウムに対してイリジウムを組み合わせることにより、パラジウムの酸化を抑制することができる。イリジウムの前駆体及びパラジウムの前駆体は、イリジウム及びパラジウムの塩又は錯体が挙げられる。イリジウムの塩又は錯体としては、硝酸イリジウム、酢酸イリジウム、塩化イリジウム等を挙げることができる。パラジウムの塩又は錯体としては、塩化パラジウム、酢酸パラジウム、硝酸パラジウム等を挙げることができる。
以下、本発明を実施例により説明するが、本発明は実施例の範囲に限定されない。
リーン:14.7(CO2)、0.72(O2)、0.19(C3H6)、0.17(CO)、0.35(NO)、3(H2O)
ストイキ:14.8(CO2)、0.35(O2)、0.29(C3H6)、0.47(CO)、0.33(NO)、3(H2O)
リッチ:14.2(CO2)、0.26(O2)、0.45(C3H6)、1.3(CO)、0.3(NO)、3(H2O)
純水にポリビニルピロリドンを加え、これに塩化パラジウム及び硝酸イリジウムをPdとIrとの質量比が97:3となるよう添加して混合し(両金属の濃度の和が0.5質量%)、さらに、エタノール375mLを加えて約50℃で30分撹拌した。その後、約90℃で約3時間還流してエタノール還元を行った。得られた濃縮薬液を適量取り、アルミナ100%の担体に担持した。
乾燥後、得られた粉末を500℃の電気炉で2時間焼成してペレットとすることにより触媒を得た。
塩化パラジウム及び硝酸イリジウムをPdとIrとの質量比が93:7となるように添加した以外は実施例1と同様にして触媒を得た。
塩化パラジウム及び硝酸イリジウムをPdとIrとの質量比が90:10となるように添加した以外は実施例1と同様にして触媒を得た。
硝酸イリジウムを使用せず、塩化パラジウム添加後のパラジウムの濃度を0.5質量%としたこと以外は実施例1と同様にして触媒を得た。
塩化パラジウムを使用せず、硝酸イリジウム添加後のイリジウムの濃度を0.25質量%としたこと以外は実施例1と同様にして触媒を得た。
純水に塩化パラジウムを添加して混合し(パラジウム濃度0.5質量%)、さらに、エタノール375mLを加えて約50℃で30分撹拌した。その後、約90℃で約3時間還流してエタノール還元を行った。
得られた実施例1−3及び比較例1−3の触媒について、各試験を行った。
(1)RL(Rich/Lean)1100℃耐久試験
RL1100℃耐久試験は、各触媒6gを秤量し、1100℃で保持しながらリッチ雰囲気とリーン雰囲気を5分間サイクルで5時間、交互に繰り返し流すことにより行った。
(2)Air1100℃耐久試験
Air1100℃耐久試験は、各触媒6gを秤量し、1100℃で保持しながら空気を5時間流すことにより行った。
耐久試験前及び耐久試験後の触媒をリッチ雰囲気、ストイキ雰囲気又はリーン雰囲気(流量10L)において、THC(全炭化水素)、CO及びNOx浄化率並びにT50温度について温度特性試験を行った。
RL1100℃耐久試験前後又はAir1100℃耐久試験前後の各触媒について、COパルスによるCO吸着量測定を行った。
有機分析による貴金属比率の分析は、各触媒約0.1gを秤量し、過酸化ナトリウム水溶液に溶解した後、水を加えて200mlにメスアップして得られたサンプルについて、誘導結合プラズマ(Inductively Coupled Plasma:ICP)を用いて行った。結果を以下に示す。尚、各触媒は耐久前のものを使用した。
実施例1 質量比で95:5
実施例2 質量比で90:10
実施例3 質量比で87:13
Claims (4)
- (a)ポリビニルピロリドン、N−メチルピロリドン及びN−ビニル−2−ピロリドンから選択される少なくとも1種以上を含有する溶媒に、イリジウムの前駆体及びパラジウムの前駆体を添加する工程、
(b)得られた触媒金属コロイドに還元剤を添加する工程、
(c)得られた溶液を加熱還流させることにより触媒金属粒子を含む濃縮溶液を得る工程、及び
(d)触媒金属粒子を担体に担持する工程を含み、
触媒金属粒子中のイリジウムの含有量が、イリジウム及びパラジウムの総質量に対して3〜10質量%である、触媒金属粒子の担持方法。 - 触媒金属粒子中のイリジウムの含有量が、イリジウム及びパラジウムの総質量に対して3〜7質量%である、請求項1に記載の方法。
- (a)ポリビニルピロリドン、N−メチルピロリドン及びN−ビニル−2−ピロリドンから選択される少なくとも1種以上を含有する溶媒に、イリジウムの前駆体及びパラジウムの前駆体を添加する工程、
(b)得られた触媒金属コロイドに還元剤を添加する工程、
(c)得られた溶液を加熱還流させることにより触媒金属粒子を含む濃縮溶液を得る工程、及び
(d)触媒金属粒子を担体に担持する工程を含み、
触媒金属粒子中のイリジウムの含有量が、イリジウム及びパラジウムの総質量に対して3〜10質量%である、排ガス除去用触媒の製造方法。 - 触媒金属粒子中のイリジウムの含有量が、イリジウム及びパラジウムの総質量に対して3〜7質量%である、請求項3に記載の排ガス除去用触媒の製造方法。
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JP2012264167A JP5880412B2 (ja) | 2012-12-03 | 2012-12-03 | 触媒金属粒子の担持方法及び排ガス除去用触媒の製造方法 |
PCT/JP2013/082037 WO2014087915A1 (ja) | 2012-12-03 | 2013-11-28 | 排ガス除去用触媒の製造方法及びその製造方法により得られる触媒 |
US14/439,936 US9889432B2 (en) | 2012-12-03 | 2013-11-28 | Method for producing catalyst for exhaust gas removal and catalyst obtained by the production method |
EP13860288.3A EP2926900B1 (en) | 2012-12-03 | 2013-11-28 | Method for supporting catalyst metal particles, and supported catalyst metal particles obtainable by said method |
CN201380062978.4A CN104822453B (zh) | 2012-12-03 | 2013-11-28 | 排气除去用催化剂的制造方法和采用该制造方法得到的催化剂 |
RU2015120437/04A RU2604537C1 (ru) | 2012-12-03 | 2013-11-28 | Способ изготовления катализатора для очистки выхлопных газов и катализатор, полученный данным способом изготовления |
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CN115095415B (zh) * | 2021-11-08 | 2024-03-05 | 长城汽车股份有限公司 | 一种测定LNT中NOx含量的方法、装置、电子设备和介质 |
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JPS593216B2 (ja) * | 1976-06-17 | 1984-01-23 | 日産自動車株式会社 | 排ガス処理用触媒 |
DE3940758A1 (de) * | 1989-12-09 | 1991-06-13 | Degussa | Verfahren zur reinigung der abgase von dieselmotoren |
EP0661089B1 (en) * | 1993-12-28 | 1998-03-11 | Kabushiki Kaisha Riken | Device and method for cleaning exhaust gas |
JPH10501172A (ja) * | 1994-06-01 | 1998-02-03 | エイエスイーシー・マニュファクチュアリング・カンパニー | 過剰な酸素を含む内燃エンジンからの排気ガス中のNO▲x▼の還元用合金化金属触媒 |
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RU2604537C1 (ru) | 2016-12-10 |
US9889432B2 (en) | 2018-02-13 |
CN104822453A (zh) | 2015-08-05 |
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