JP2019528155A - ディーゼル酸化触媒コンバータ - Google Patents
ディーゼル酸化触媒コンバータ Download PDFInfo
- Publication number
- JP2019528155A JP2019528155A JP2018564261A JP2018564261A JP2019528155A JP 2019528155 A JP2019528155 A JP 2019528155A JP 2018564261 A JP2018564261 A JP 2018564261A JP 2018564261 A JP2018564261 A JP 2018564261A JP 2019528155 A JP2019528155 A JP 2019528155A
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- JP
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- Prior art keywords
- oxidation catalyst
- diesel
- diesel oxidation
- palladium
- length
- 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.)
- Granted
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- 230000003647 oxidation Effects 0.000 title claims abstract description 40
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 40
- 230000003197 catalytic effect Effects 0.000 title abstract 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims abstract description 73
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000000463 material Substances 0.000 claims abstract description 38
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 26
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 22
- 239000011149 active material Substances 0.000 claims abstract description 3
- 239000003054 catalyst Substances 0.000 claims description 51
- 239000007789 gas Substances 0.000 claims description 17
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 11
- 150000001342 alkaline earth metals Chemical class 0.000 claims description 10
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 10
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052788 barium Inorganic materials 0.000 claims description 5
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 229910052712 strontium Inorganic materials 0.000 claims description 5
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 description 11
- 102000047918 Myelin Basic Human genes 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 238000000576 coating method Methods 0.000 description 8
- 239000012041 precatalyst Substances 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 229910052878 cordierite Inorganic materials 0.000 description 6
- 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 description 6
- 108700028031 Myelin Basic Proteins 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 229910000510 noble metal Inorganic materials 0.000 description 5
- 239000000725 suspension Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 101001123334 Homo sapiens Proteoglycan 3 Proteins 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 101710110798 Mannose-binding protein C Proteins 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910052746 lanthanum Inorganic materials 0.000 description 2
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- IATRAKWUXMZMIY-UHFFFAOYSA-N strontium oxide Chemical compound [O-2].[Sr+2] IATRAKWUXMZMIY-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-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
- 239000000243 solution Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
- F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
- F01N2510/0684—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings having more than one coating layer, e.g. multi-layered coatings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
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Abstract
Description
第1の端面a及び第2の端面bの間に延びる長さLを有する担体本体と、
担体本体上に配置された様々に構成された触媒活性材料ゾーンA及びBと、を備え、
−材料ゾーンAは、パラジウム又は重量比Pt:Pdが≦1の白金及びパラジウムを含有して、端面aから長さLの20〜80%に延び、
−材料ゾーンBは、重量比Pt:Pdが<10の白金及びパラジウムを含有して、長さLの80〜100%に延び、
材料ゾーンBは材料ゾーンAの上方に配置され、材料ゾーンA及びBに対する重量比Pt:Pdは1.5〜3.0である、ディーゼル酸化触媒、に関する。
(実施例1)
a)セル密度62cpcm(400cpsi)及び壁厚165μm(6.5ミル)を有する14.4cm×10.2cm(5.66”×4.00”)の寸法を有するコーディエライトの市販の円形フロースルー基材を、48.23g/Lの市販のランタンドープ酸化アルミニウム、1.00g/Lの酸化ストロンチウム(Sr(OH)2を除く)、0.47086g/Lの標準水溶性Pd化合物、及び0.23543g/Lの標準水溶性Pt化合物を含有するウォッシュコートで、一端(端面aに対応する)から始めてその長さの50%にわたってコーティングした。Pt:Pd重量比は1:2であった。
b)a)により得られたコーティングされた基材を、49.23g/Lのランタンドープされたメソポーラス酸化アルミニウム、0.60540g/Lの標準水溶性Pt化合物、及び0.10090g/Lの標準水溶性Pd化合物を含有するウォッシュコートで、その全長にわたってコーティングした。Pt:Pd重量比は6:1であった。
a)実施例1に記載の方法と同様の方法で、セル密度62cpcm(400cpsi)及び壁厚165μm(6.5ミル)を有する14.4cm×10.2cm(5.66”×4.00”)の寸法を有するコーディエライト製の市販の円形フロースルー基材を、0.293g/L(8.3g/ft3)の白金及びパラジウムを1:1の重量比で含むウォッシュコートで、一端(端面aに対応する)から始めてその長さの80%にわたってコーティングした。
b)a)により得られたコーティングされた基材を、0.473g/L(13.4g/ft3)の白金及びパラジウムを3:1の重量比で含むウォッシュコートで、その全長にわたってコーティングした。
a)実施例1に記載の方法と同様の方法で、セル密度62cpcm(400cpsi)及び壁厚165μm(6.5ミル)を有する14.4cm×10.2cm(5.66”×4.00”)の寸法を有するコーディエライト製の市販の円形フロースルー基材を、0.357g/L(10.1g/ft3)の白金及びパラジウムを1.4:1の重量比で含むウォッシュコートで、その全長にわたってコーティングした。
b)a)により得られたコーティングされた基材を、0.350g/L(9.9g/ft3)の白金及びパラジウムを3:1の重量比で含むウォッシュコートで、その全長にわたってコーティングした。
a)実施例1に記載の方法と同様の方法で、セル密度62cpcm(400cpsi)及び壁厚165μm(6.5ミル)を有する14.4cm×10.2cm(5.66”×4.00”)の寸法を有するコーディエライト製の市販の円形フロースルー基材を、0.636g/L(18g/ft3)の白金及びパラジウムを1:1の重量比で含むウォッシュコートで、一端(端面aに対応する)から始めてその長さの80%にわたってコーティングした。
b)a)により得られたコーティングされた基材を、0.198g/L(5.6g/ft3)の白金及びパラジウムを6:1の重量比で含むウォッシュコートで、その全長にわたってコーティングした。
a)実施例1に記載の方法と同様の方法で、セル密度62cpcm(400cpsi)及び壁厚165μm(6.5ミル)を有する14.4cm×10.2cm(5.66”×4.00”)の寸法を有するコーディエライト製の市販の円形フロースルー基材を、0.618g/L(17.5g/ft3)の白金及びパラジウムを1:2の重量比で含むウォッシュコートで、その全長にわたってコーティングした。
b)a)により得られたコーティングされた基材を、0.177g/L(5g/ft3)の白金及びパラジウムを1:2の重量比で含むウォッシュコートで、一端(端面aに対応する)から始めてその長さの50%にわたってコーティングした。
実施例2及び3並びに比較例1及び2では、いわゆるヒートアップ実験が行われた。この目的のために、従来の乗用車エンジンテストベンチ(排気量2.0L、4気筒、ディーゼル、TDI、コモンレール)上で、二次燃料噴射を介して、各ケースにおいて試験されるディーゼル酸化触媒の上方にあるまさにその燃料の触媒燃焼によって、熱の形態でエネルギーを(発熱的に)放出した。
Claims (9)
- 第1の端面aと第2の端面bの間に延びる長さLを有する担体本体と、
前記担体本体上に配置された様々に構成された触媒活性材料ゾーンA及びBと、を備え、
−材料ゾーンAは、パラジウム又は重量比Pt:Pdが≦1の白金及びパラジウムを含有して、端面aから始まって、長さLの20〜80%に延び、
−材料ゾーンBは、重量比Pt:Pdが<10の白金及びパラジウムを含有して、長さLの80〜100%に延び、
材料ゾーンBは材料ゾーンAの上方に配置され、前記材料ゾーンA及びBに対する前記重量比Pt:Pdは1.5〜3.0である、ディーゼル酸化触媒。 - 前記材料ゾーンA及びBにおいて、パラジウム又は白金及びパラジウムは担体酸化物上に存在することを特徴とする、請求項1に記載のディーゼル酸化触媒。
- 材料ゾーンAとCにおける前記担体酸化物は、同一であるか、又は互いに異なるものであり、酸化アルミニウム、ドープされた酸化アルミニウム、酸化ケイ素、二酸化チタン及びそれらの1つ以上の混合酸化物からなる群から選択されることを特徴とする、請求項2に記載のディーゼル酸化触媒。
- 材料ゾーンAは、アルカリ土類金属を含有することを特徴とする、請求項1〜3のいずれか一項に記載のディーゼル酸化触媒。
- 材料ゾーンA内の前記アルカリ土類金属は、ストロンチウム又はバリウム又はストロンチウム及びバリウムであることを特徴とする、請求項4に記載のディーゼル酸化触媒。
- 前記材料ゾーンBの前記長さは、前記担体本体の全長Lの95%又は100%であることを特徴とする、請求項1〜5のいずれか一項に記載のディーゼル酸化触媒。
- ディーゼル排気ガスの処理方法であって、前記ディーゼル排気ガスは、請求項1〜6のいずれか一項に記載のディーゼル酸化触媒を通して導かれることを特徴とし、前記ディーゼル排気ガスは、端面aで前記担体本体に流入し、端面bで前記担体本体から流出する、方法。
- 請求項1〜6のいずれか一項に記載のディーゼル酸化触媒を有する、ディーゼルエンジンの排ガス浄化デバイス。
- 請求項1〜6のいずれか一項に記載の前記ディーゼル酸化触媒は、ディーゼル微粒子フィルタ及び/又は窒素酸化物の選択的触媒還元のための触媒の上流に配置されていることを特徴とする、請求項8に記載のデバイス。
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