JP4204520B2 - 排ガス浄化触媒の製造方法 - Google Patents
排ガス浄化触媒の製造方法 Download PDFInfo
- Publication number
- JP4204520B2 JP4204520B2 JP2004184833A JP2004184833A JP4204520B2 JP 4204520 B2 JP4204520 B2 JP 4204520B2 JP 2004184833 A JP2004184833 A JP 2004184833A JP 2004184833 A JP2004184833 A JP 2004184833A JP 4204520 B2 JP4204520 B2 JP 4204520B2
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- alumina
- supported
- gas purification
- complex oxide
- 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.)
- Expired - Fee Related
Links
- 239000003054 catalyst Substances 0.000 title claims description 40
- 238000000746 purification Methods 0.000 title claims description 39
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims description 67
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 35
- 239000011148 porous material Substances 0.000 claims description 27
- 150000003839 salts Chemical class 0.000 claims description 16
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 6
- 150000002910 rare earth metals Chemical class 0.000 claims description 5
- 229910052723 transition metal Inorganic materials 0.000 claims description 3
- 150000003624 transition metals Chemical class 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 description 31
- 239000007789 gas Substances 0.000 description 30
- 229910017771 LaFeO Inorganic materials 0.000 description 29
- 239000007864 aqueous solution Substances 0.000 description 21
- 239000002131 composite material Substances 0.000 description 14
- 229910000510 noble metal Inorganic materials 0.000 description 12
- 238000002156 mixing Methods 0.000 description 11
- 238000005470 impregnation Methods 0.000 description 10
- 239000002243 precursor Substances 0.000 description 10
- 239000000843 powder Substances 0.000 description 9
- 238000011068 loading method Methods 0.000 description 8
- 238000010304 firing Methods 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000003993 interaction Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000001294 propane Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000001069 Raman spectroscopy Methods 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- GJKFIJKSBFYMQK-UHFFFAOYSA-N lanthanum(3+);trinitrate;hexahydrate Chemical class O.O.O.O.O.O.[La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O GJKFIJKSBFYMQK-UHFFFAOYSA-N 0.000 description 2
- ALIMWUQMDCBYFM-UHFFFAOYSA-N manganese(2+);dinitrate;tetrahydrate Chemical compound O.O.O.O.[Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ALIMWUQMDCBYFM-UHFFFAOYSA-N 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 238000001237 Raman spectrum Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 235000012501 ammonium carbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910001960 metal nitrate Inorganic materials 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Landscapes
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
〔担持方法の比較〕
本発明の排ガス浄化触媒の製造方法は、被担持体を含浸法を用いてアルミナに担持するものである。実施例1では、含浸法の中でも、特に、IW法による担持方法が、従来の含浸法(蒸発乾固法(NIT法)や物理混合法)による担持方法に比して優れていることを実証する。
(発明例1〜3:IW法)
ポリ塩化ビニリデンフィルム上に所定量のアルミナを配置し、1gのアルミナ(細孔容積0.69cm3)に対して、1.48mol/1のLa,Mn硝酸塩水溶液を0.31cm3マイクロピペットによってアルミナに滴下し、アルミナをフィルムに包んで十分に溶液を含浸させた。その後、650℃(発明例1)、750℃(発明例2)、850℃(発明例3)でそれぞれ5時間焼成した。これにより、10wt%LaFeO3/A12O3(発明例1〜3)をそれぞれ得た。
硝酸ランタン六水和物の前駆体塩水溶液と、硝酸マンガン四水和物の前駆体塩水溶液とを混合し、混合水溶液に、所定量のアルミナを浸す。この際、水溶液中の水の量はアルミナ細孔容積に比して大過剰量とする。これを蒸発乾固させ、次いで、110℃で12時間乾燥させ、650℃(比較例1)、750℃(比較例2)、850℃(比較例3)でそれぞれ5時間焼成し、10wt%LaFeO3/A12O3(比較例1〜3)をそれぞれ得た。
硝酸ランタン六水和物の前駆体塩水溶液と、硝酸マンガン四水和物の前駆体塩水溶液との混合水溶液、及び炭酸アンモニウムにアンモニア水を加えた沈殿剤水溶液を作製した。次いで、沈殿剤水溶液に前駆体塩の混合水溶液を滴下し、生成した沈殿物を吸引ろ過して洗浄した後、110℃で12時間乾燥させ、650℃(比較例4)、750℃(比較例5)、850℃(比較例6)でそれぞれ5時間焼成し、LaFeO3(比較例4〜6)をそれぞれ得た。これらをアルミナとともに乳鉢を用いて物理混合し、10wt%LaFeO3/A12O3(比較例4〜6)をそれぞれ得た。
IW法を用い、ペロブスカイトが生成していない場合について検討するため、発明例1〜3と同様の方法で、焼成温度を650℃(比較例7)、750℃(比較例8)、850℃(比較例9)として、Fe2O3/A12O3(比較例7〜9)をそれぞれ得た。
次に、実施例2では、A12O3へのLaFeO3の担持量が、プロパン転化率へどのように影響するかについて調査した。
(発明例4,5:IW法)
発明例3と同様の方法、即ちIW法を用い、焼成温度を850℃として、5wt%LaFeO3/A12O3(発明例4)、20wt%LaFeO3/A12O3(発明例5)をそれぞれ得た。
比較例3と同様の方法、即ちNIT法を用い、焼成温度を850℃として、5wt%LaFeO3/A12O3(比較例10)、10wt%LaFeO3/A12O3(比較例11)をそれぞれ得た。
排ガス浄化触媒には、ペロブスカイト構造の複合酸化物が好適であり、アルミナを担体とした場合についても、ペロブスカイト型複合酸化物の被担持体が確実に担持されていることが有利である。このため、実施例3では、上記の各担持方法(1W法、NIT法及び物理混合法)と排ガス浄化触媒の結晶構造との関係、及び担持量と排ガス浄化触媒の結晶構造との関係について調査した。
Claims (1)
- アルミナからなる担持体と、前記担持体に担持され、LnMO3(Ln:希土類金属、M:遷移金属及びAlのうちの少なくとも一種)で表されるペロブスカイト型複合酸化物を含む被担持体とを備える排ガス浄化触媒を製造するにあたり、アルミナの細孔容積以下の容積のLn塩およびM塩を含有する溶液をアルミナと接触させることにより、アルミナの細孔内に上記溶液を選択的に浸み込ませ、細孔壁に固定させる工程を経ることにより排ガス浄化触媒を得ることを特徴とする排ガス浄化触媒の製造方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004184833A JP4204520B2 (ja) | 2004-06-23 | 2004-06-23 | 排ガス浄化触媒の製造方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004184833A JP4204520B2 (ja) | 2004-06-23 | 2004-06-23 | 排ガス浄化触媒の製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006007023A JP2006007023A (ja) | 2006-01-12 |
JP4204520B2 true JP4204520B2 (ja) | 2009-01-07 |
Family
ID=35774843
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004184833A Expired - Fee Related JP4204520B2 (ja) | 2004-06-23 | 2004-06-23 | 排ガス浄化触媒の製造方法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4204520B2 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5076377B2 (ja) * | 2006-07-03 | 2012-11-21 | トヨタ自動車株式会社 | 排ガス浄化触媒 |
JP5119531B2 (ja) * | 2007-12-26 | 2013-01-16 | 国立大学法人 名古屋工業大学 | セラミックス触媒材料とそれを用いた排気浄化方法 |
EP4062875B1 (en) | 2017-03-14 | 2024-05-08 | Shape Memory Medical, Inc. | Shape memory polymer foams to seal space around valves |
EP3704177A4 (en) | 2017-10-30 | 2021-08-11 | The Texas A&M University System | RADIO-OPAQUE THERMOPLASTIC POLYMER |
-
2004
- 2004-06-23 JP JP2004184833A patent/JP4204520B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2006007023A (ja) | 2006-01-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8053388B2 (en) | Catalyst support particle, exhaust gas purifying catalyst, and production processes thereof | |
JP5864443B2 (ja) | 排気ガス浄化用触媒 | |
JP2013252465A (ja) | 排気ガス浄化用触媒担体及び排気ガス浄化用触媒 | |
JP5607131B2 (ja) | 排ガス浄化用触媒 | |
US8357626B2 (en) | Oxygen storage/release material and exhaust gas purifying catalyst comprising the same | |
JP4204520B2 (ja) | 排ガス浄化触媒の製造方法 | |
JPH0312936B2 (ja) | ||
US10975744B2 (en) | Exhaust gas purification apparatus for motor vehicles | |
JP5071840B2 (ja) | 排ガス浄化用触媒 | |
US9073048B2 (en) | Exhaust gas-purifying catalyst and method of manufacturing the same | |
KR20140082632A (ko) | 세라믹 담체, 및 상기 담체에 기계적으로 고정된 활성 상을 포함하는, 열기관으로부터의 배기 가스의 정화를 위한 장치 | |
KR20140061353A (ko) | 세라믹 담체, 및 상기 담체에 화학적 및 기계적으로 고정된 활성 상을 포함하는, 열기관으로부터의 배기 가스의 정화를 위한 장치 | |
KR20050102104A (ko) | 배기 가스 정화용 촉매 및 이의 제조 방법 | |
JPH08229394A (ja) | 酸化物担持触媒担体の製造方法 | |
US20100016149A1 (en) | Oxygen storage/release material and exhaust gas purifying catalyst comprising the same | |
JP2002210369A (ja) | 排気ガス浄化用触媒及びその製造方法 | |
JP4775953B2 (ja) | 排ガス浄化用触媒及びその再生方法 | |
JP2006341152A (ja) | 触媒担体及び排ガス浄化触媒の製造方法 | |
JP2000051700A (ja) | 排気ガス浄化用触媒及びその製造方法 | |
JPS59162948A (ja) | 排気ガス浄化用触媒 | |
JP3897483B2 (ja) | 排ガス浄化用触媒とその製造方法及び排ガス浄化方法 | |
JPH1176819A (ja) | 排ガス浄化用触媒 | |
JP2006035153A (ja) | 排ガス浄化触媒 | |
JP2006055768A (ja) | 排ガス浄化触媒及びその製造方法 | |
JP2000051698A (ja) | 排気ガス浄化用触媒及びその使用方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20061220 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20080704 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20080709 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080903 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20080929 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20081014 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111024 Year of fee payment: 3 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 4204520 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111024 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20121024 Year of fee payment: 4 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131024 Year of fee payment: 5 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |