JP2022058647A - Scr活性コーティングを有する触媒 - Google Patents
Scr活性コーティングを有する触媒 Download PDFInfo
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- JP2022058647A JP2022058647A JP2022005655A JP2022005655A JP2022058647A JP 2022058647 A JP2022058647 A JP 2022058647A JP 2022005655 A JP2022005655 A JP 2022005655A JP 2022005655 A JP2022005655 A JP 2022005655A JP 2022058647 A JP2022058647 A JP 2022058647A
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- Prior art keywords
- catalyst
- zeolite
- length
- material zone
- substrate
- 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.)
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- 239000003054 catalyst Substances 0.000 title claims abstract description 115
- 238000000576 coating method Methods 0.000 title description 14
- 239000011248 coating agent Substances 0.000 title description 12
- 239000000463 material Substances 0.000 claims abstract description 62
- 239000000758 substrate Substances 0.000 claims abstract description 62
- 239000010457 zeolite Substances 0.000 claims abstract description 58
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 48
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000011149 active material Substances 0.000 claims abstract description 43
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 35
- UNYSKUBLZGJSLV-UHFFFAOYSA-L calcium;1,3,5,2,4,6$l^{2}-trioxadisilaluminane 2,4-dioxide;dihydroxide;hexahydrate Chemical compound O.O.O.O.O.O.[OH-].[OH-].[Ca+2].O=[Si]1O[Al]O[Si](=O)O1.O=[Si]1O[Al]O[Si](=O)O1 UNYSKUBLZGJSLV-UHFFFAOYSA-L 0.000 claims abstract description 17
- 229910052742 iron Inorganic materials 0.000 claims abstract description 16
- 239000010949 copper Substances 0.000 claims description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 33
- 229910052802 copper Inorganic materials 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 12
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 239000011159 matrix material Substances 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 6
- 239000004202 carbamide Substances 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 239000012876 carrier material Substances 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 230000002085 persistent effect Effects 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 16
- 229910052676 chabazite Inorganic materials 0.000 abstract description 9
- 238000005342 ion exchange Methods 0.000 abstract 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 39
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 33
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 21
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 16
- 239000011148 porous material Substances 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 9
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 9
- 229910002089 NOx Inorganic materials 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 229910052878 cordierite Inorganic materials 0.000 description 5
- 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 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 3
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- 229910001928 zirconium oxide Inorganic materials 0.000 description 3
- 239000000654 additive Substances 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
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 2
- 239000001272 nitrous oxide Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 1
- 241000589614 Pseudomonas stutzeri Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 229940009868 aluminum magnesium silicate Drugs 0.000 description 1
- WMGSQTMJHBYJMQ-UHFFFAOYSA-N aluminum;magnesium;silicate Chemical compound [Mg+2].[Al+3].[O-][Si]([O-])([O-])[O-] WMGSQTMJHBYJMQ-UHFFFAOYSA-N 0.000 description 1
- BVCZEBOGSOYJJT-UHFFFAOYSA-N ammonium carbamate Chemical compound [NH4+].NC([O-])=O BVCZEBOGSOYJJT-UHFFFAOYSA-N 0.000 description 1
- VZTDIZULWFCMLS-UHFFFAOYSA-N ammonium formate Chemical compound [NH4+].[O-]C=O VZTDIZULWFCMLS-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-N carbonic acid monoamide Natural products NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- -1 oxides Chemical class 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
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- B01J29/763—CHA-type, e.g. Chabazite, LZ-218
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- F01N2370/00—Selection of materials for exhaust purification
- F01N2370/02—Selection of materials for exhaust purification used in catalytic reactors
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Abstract
Description
SCR触媒活性材料Aは、イオン交換鉄及び/又は銅を含有する、レビナイト構造型のゼオライトを含み、SCR触媒活性材料Bは、イオン交換鉄及び/又は銅を含有する、チャバザイト構造型のゼオライトを含み、
(i)SCR触媒活性材料A及びBは、2つの材料ゾーンA及びBの形態で存在し、触媒基板の第1の端部から生じる材料ゾーンAは、少なくとも長さLの一部にわたって延在し、触媒基板の第2の端部から生じる材料ゾーンBは、少なくとも長さLの一部にわたって延在し、
又は
(ii)触媒基板は、SCR触媒活性材料A及びマトリックス成分から形成され、SCR触媒活性材料Bは、材料ゾーンBの形態で、少なくとも触媒基板の長さLの一部にわたって延在し、
又は
(iii)触媒基板は、SCR触媒活性材料B及びマトリックス成分から形成され、SCR触媒活性材料Aは、材料ゾーンAの形態で、少なくとも触媒基板の長さLの一部にわたって延在する。
SCR触媒活性材料Bは、鉄交換鉄及び/又は銅を含有する、チャバザイト構造型のゼオライトを含有し、
SCR触媒活性材料A及びBは、2つの材料ゾーンA及びBの形態で存在し、触媒基板の第1の端部から生じる材料ゾーンAは、少なくとも長さLの一部にわたって延在し、触媒基板の第2の端部から生じる材料ゾーンBは、少なくとも長さLの一部にわたって延在する。
a)一方の端部から生じる、コーディエライトからなる従来の壁流フィルタを、4.0重量%の銅と交換されたチャバザイト構造型のゼオライトを含有するウォッシュコートで、従来の浸漬方法によってその長さの50%にわたってコーティングした。ゼオライトのSAR値は、30であった。次いで、フィルタを120℃で乾燥させた。
実施例1を繰り返したが、コーディエライトからなる従来の壁流フィルタの代わりに、コーディエライトからなる従来のフロースルー基板を使用したことが異なる。4.0重量%の銅と交換されたチャバザイト構造型のゼオライト、並びに3.5重量%の銅と交換されたレビナイト構造型のゼオライトの両方を、200g/Lの量で基板に塗布した。実施例1とは対照的に、レビナイト構造型のゼオライトは、30のSAR値を有する。
実施例2を繰り返したが、工程a)において、250g/Lの、4.0重量%の銅と交換されたチャバザイト構造型のゼオライトを塗布したこと、及び工程a)において既に使用した4.0重量%の銅と交換されたチャバザイト構造型のゼオライトを、工程b)において、150g/Lの量で基板に塗布したことが異なる。
a)実施例2及び比較実施例1による触媒を、800℃で16時間水熱的にエージングした。
1.10分間にわたり600℃のN2中で前処理を行う
2.目標温度に対して試験サイクルを繰り返す
a.ガス混合物1の目標温度に近づける
b.NOx(ガス混合物2)を加える
c.NH3(ガス混合物3)を加え、NH3が20ppmを超えるまで、又は最長30分間、待機する
d.最高500℃で昇温脱離を行う(ガス混合物3)
Claims (15)
- 長さLの触媒基板、並びに互いに異なる2つのSCR触媒活性材料A及びBを備える触媒であって、
前記SCR触媒活性材料Aが、イオン交換鉄及び/又は銅を含有する、レビナイト構造型のゼオライトを含み、前記SCR触媒活性材料Bが、イオン交換鉄及び/又は銅を含有する、チャバザイト構造型のゼオライトを含み、
(i)前記SCR触媒活性材料A及びBが、2つの材料ゾーンA及びBの形態で存在し、前記触媒基板の第1の端部から生じる材料ゾーンAが、少なくとも前記長さLの一部にわたって延在し、前記触媒基板の第2の端部から生じる材料ゾーンBが、少なくとも前記長さLの一部にわたって延在し、
又は
(ii)前記触媒基板が、前記SCR触媒活性材料A及びマトリックス成分から形成され、前記SCR触媒活性材料Bが、材料ゾーンBの形態で、少なくとも前記触媒基板の前記長さLの一部にわたって延在し、
又は
(iii)前記触媒基板が、前記SCR触媒活性材料B及びマトリックス成分から形成され、前記SCR触媒活性材料Aが、材料ゾーンAの形態で、少なくとも前記触媒基板の前記長さLの一部にわたって延在する、触媒。 - 前記チャバザイト構造型の前記ゼオライトが、6~40のSAR値を有することを特徴とする、請求項1に記載の触媒。
- 前記レビナイト構造型の前記ゼオライトが、15を超えるSAR値を有することを特徴とする、請求項1及び/又は2に記載の触媒。
- 前記チャバザイト構造型の前記ゼオライト及び前記レビナイト構造型の前記ゼオライトの両方が、イオン交換銅を含有することを特徴とする、請求項1~3の1つ以上に記載の触媒。
- 前記チャバザイト構造型の前記ゼオライト中の、及び前記レビナイト構造型の前記ゼオライト中の前記銅が、CuOとして前記交換ゼオライトの総重量に関して算出したときに、各事例において0.2~6重量%の量で独立して存在することを特徴とする、請求項4に記載の触媒。
- 前記チャバザイト構造型の前記ゼオライト中の、及び前記レビナイト構造型の前記ゼオライト中の銅とアルミニウムとの原子比率が、互いに独立して0.25~0.6であることを特徴とする、請求項1~5の1つ以上に記載の触媒。
- 20~80重量%の前記触媒活性材料が、材料ゾーンB中にあることを特徴とする、請求項1~6の1つ以上に記載の触媒。
- 材料ゾーンAが、前記触媒基板の前記長さLの全体にわたって延在し、前記触媒基板の前記第2の端部から生じる材料ゾーンBが、その長さLの10~80%にわたって延在することを特徴とする、請求項1~7の1つ以上に記載の触媒。
- 前記触媒基板の前記第1の端部から生じる材料ゾーンAが、その長さLの20~90%にわたって延在し、前記触媒基板の前記第2の端部から生じる材料ゾーンBが、その長さLの10~70%にわたって延在することを特徴とする、請求項1~7の1つ以上に記載の触媒。
- 前記触媒基板の前記第1の端部から生じる材料ゾーンAが、その長さLの20~100%にわたって延在し、材料ゾーンBが、前記触媒基板の長さの全体にわたって延在することを特徴とする、請求項1~7の1つ以上に記載の触媒。
- 前記触媒基板が、壁流フィルタであり、前記壁流フィルタの第1の端部において開放され、第2の端部において閉鎖されたチャネルが、材料ゾーンAによってコーティングされ、前記壁流フィルタの前記第1の端部において閉鎖され、前記第2の端部において開放されたチャネルが、材料ゾーンBによってコーティングされることを特徴とする、請求項1~10の1つ以上に記載の触媒。
- リーン運転の内燃エンジンからの排気ガスを浄化するための方法であって、前記排気ガスが、請求項1~11の1つ以上に記載の触媒を通じて伝導され、材料ゾーンAが、材料ゾーンBの前で、浄化されるべき前記排気ガスと接触することを特徴とする、方法。
- リーン運転の内燃エンジンからの排気ガスを浄化するためのシステムであって、請求項1~11の1つ以上に記載の触媒、並びに尿素水溶液用の注入器を備え、前記注入器が、前記触媒基板の前記第1の端部の前に位置付けられることを特徴とする、システム。
- 前記排気ガスの流れの方向において、酸化触媒、尿素水溶液用の注入器、及び請求項1~10の1つ以上に記載の触媒を有し、前記注入器が、前記触媒基板の前記第1の端部の前に位置付けられることを特徴とする、請求項13に記載のシステム。
- 担体材料上の白金が、前記酸化触媒として使用されることを特徴とする、請求項14に記載のシステム。
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