JP2013116446A - 排ガス浄化用触媒 - Google Patents
排ガス浄化用触媒 Download PDFInfo
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- JP2013116446A JP2013116446A JP2011265175A JP2011265175A JP2013116446A JP 2013116446 A JP2013116446 A JP 2013116446A JP 2011265175 A JP2011265175 A JP 2011265175A JP 2011265175 A JP2011265175 A JP 2011265175A JP 2013116446 A JP2013116446 A JP 2013116446A
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- ceria
- zirconia
- exhaust gas
- composite oxide
- zirconia composite
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- 239000003054 catalyst Substances 0.000 title claims abstract description 47
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 108
- 239000002131 composite material Substances 0.000 claims abstract description 54
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims abstract description 26
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 13
- 229910000510 noble metal Inorganic materials 0.000 claims description 9
- 238000000746 purification Methods 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 36
- 239000001301 oxygen Substances 0.000 abstract description 36
- 229910052760 oxygen Inorganic materials 0.000 abstract description 36
- 239000007789 gas Substances 0.000 abstract description 33
- 238000003860 storage Methods 0.000 abstract description 16
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 17
- 239000011232 storage material Substances 0.000 description 14
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 12
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 11
- 239000000463 material Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 8
- 239000013078 crystal Substances 0.000 description 7
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 6
- 229910052763 palladium Inorganic materials 0.000 description 6
- 229910052761 rare earth metal Inorganic materials 0.000 description 6
- 229910052684 Cerium Inorganic materials 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 239000006104 solid solution Substances 0.000 description 5
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- -1 cerium ions Chemical class 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- UJVRJBAUJYZFIX-UHFFFAOYSA-N nitric acid;oxozirconium Chemical compound [Zr]=O.O[N+]([O-])=O.O[N+]([O-])=O UJVRJBAUJYZFIX-UHFFFAOYSA-N 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910052777 Praseodymium Inorganic materials 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- OVSKIKFHRZPJSS-UHFFFAOYSA-N 2,4-D Chemical compound OC(=O)COC1=CC=C(Cl)C=C1Cl OVSKIKFHRZPJSS-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 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
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- SIXSYDAISGFNSX-UHFFFAOYSA-N scandium atom Chemical compound [Sc] SIXSYDAISGFNSX-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
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- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
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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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- B01J23/44—Palladium
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
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Abstract
【解決手段】本発明によりa:ジルコニアよりもセリアを多く含むセリア−ジルコニア複合酸化物、b:セリアよりもジルコニアを多く含むセリア−ジルコニア複合酸化物、およびc:パイロクロア型の規則配列構造を有するセリア−ジルコニア複合酸化物を含む、排ガス浄化用触媒が提供される。本発明の排ガス浄化用触媒は従来よりも高い酸素貯蔵能を有し、NOx排出量の低減に有効である。
【選択図】図1
Description
b:セリアよりもジルコニアを多く含むセリア−ジルコニア複合酸化物、および
c:パイロクロア型の規則配列構造を有するセリア−ジルコニア複合酸化物
を含む、排ガス浄化用触媒。
(2)aの含有量とbの含有量のいずれもがcの含有量よりも多い、(1)に記載の排ガス浄化用触媒。
(3)a〜cの総含有量に対するcの含有量が1〜30重量%である、(1)または(2)に記載の排ガス浄化用触媒。
(4)白金族貴金属をさらに含み、白金族貴金属1重量部に対するa〜cの総含有量が100〜150重量部である、(1)〜(3)のいずれかに記載の排ガス浄化用触媒。
40g/Lのランタン添加アルミナ担体(La2O3/Al2O3=4/96重量%)に対して金属パラジウムが1g/Lの比率になるよう、硝酸パラジウム溶液を担体中に含浸させた。120℃で30分間乾燥させた後、500℃で2時間焼成し、アルミナ担持パラジウム触媒を得た。
酸素貯蔵材として「CZ材」「ZC材」および「パイロクロアCZ材」の3種類を用いた。それぞれの組成を表1に示す。
上記2)で得た触媒スラリーを875ccのモノリス基材にコートし、150℃で乾燥した後500℃で焼成して排ガス浄化用触媒を得た。得られた触媒について、下記のようにして、直列4気筒エンジンを用いた触媒活性の評価を行った。
Claims (4)
- a:ジルコニアよりもセリアを多く含むセリア−ジルコニア複合酸化物、
b:セリアよりもジルコニアを多く含むセリア−ジルコニア複合酸化物、および
c:パイロクロア型の規則配列構造を有するセリア−ジルコニア複合酸化物
を含む、排ガス浄化用触媒。 - aの含有量とbの含有量のいずれもがcの含有量よりも多い、請求項1に記載の排ガス浄化用触媒。
- a〜cの総含有量に対するcの含有量が1〜30重量%である、請求項1または2に記載の排ガス浄化用触媒。
- 白金族貴金属をさらに含み、白金族貴金属1重量部に対するa〜cの総含有量が100〜150重量部である、請求項1〜3のいずれか1項に記載の排ガス浄化用触媒。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011265175A JP5724856B2 (ja) | 2011-12-02 | 2011-12-02 | 排ガス浄化用触媒 |
US13/677,657 US20130143732A1 (en) | 2011-12-02 | 2012-11-15 | Exhaust gas purifying catalyst |
CN201210506182.0A CN103127927B (zh) | 2011-12-02 | 2012-11-30 | 排气净化用催化剂 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011265175A JP5724856B2 (ja) | 2011-12-02 | 2011-12-02 | 排ガス浄化用触媒 |
Publications (2)
Publication Number | Publication Date |
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JP2013116446A true JP2013116446A (ja) | 2013-06-13 |
JP5724856B2 JP5724856B2 (ja) | 2015-05-27 |
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JP2011265175A Active JP5724856B2 (ja) | 2011-12-02 | 2011-12-02 | 排ガス浄化用触媒 |
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---|---|
US (1) | US20130143732A1 (ja) |
JP (1) | JP5724856B2 (ja) |
CN (1) | CN103127927B (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015033204A1 (en) | 2013-09-06 | 2015-03-12 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification catalyst for motor vehicle |
JP2015093267A (ja) * | 2013-11-14 | 2015-05-18 | トヨタ自動車株式会社 | 排ガス浄化触媒 |
JP2016112492A (ja) * | 2014-12-12 | 2016-06-23 | トヨタ自動車株式会社 | 排ガス浄化触媒 |
JP2016112489A (ja) * | 2014-12-12 | 2016-06-23 | トヨタ自動車株式会社 | 排ガス浄化触媒 |
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US20130143732A1 (en) | 2013-06-06 |
CN103127927B (zh) | 2015-09-02 |
CN103127927A (zh) | 2013-06-05 |
JP5724856B2 (ja) | 2015-05-27 |
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