Catalyst composition for exhaust gas purification and exhaust gas purifying catalyst for automobiles
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-023/00
B01J-023/02
B01J-023/08
B01J-023/10
B01J-023/40
B01J-023/42
B01J-023/44
B01J-023/56
B01J-021/04
B01J-023/63
B01J-037/02
B01J-035/02
B01D-053/94
B01J-023/46
출원번호
US-0398515
(2013-05-28)
등록번호
US-9339794
(2016-05-17)
우선권정보
JP-2012-145555 (2012-06-28)
국제출원번호
PCT/JP2013/064684
(2013-05-28)
국제공개번호
WO2014/002667
(2014-01-03)
발명자
/ 주소
Nagashima, Ken
출원인 / 주소
N.E. CHEMCAT CORPORATION
대리인 / 주소
Westerman, Hattori, Daniels & Adrian, LLP
인용정보
피인용 횟수 :
1인용 특허 :
15
초록▼
The present invention is to provide a catalyst composition for exhaust gas purification, which is superior in purification performance for nitrogen oxides (NOx), carbon monoxide (CO) and hydrocarbons (HC) in exhaust gas to be discharged from an internal combustion engine of a gasoline vehicle or the
The present invention is to provide a catalyst composition for exhaust gas purification, which is superior in purification performance for nitrogen oxides (NOx), carbon monoxide (CO) and hydrocarbons (HC) in exhaust gas to be discharged from an internal combustion engine of a gasoline vehicle or the like; and an catalyst for exhaust gas purification for automobiles. The present invention is a catalyst composition for exhaust gas purification for purifying nitrogen oxides, carbon monoxide, and hydrocarbons in exhaust gas, which includes a catalyst composition wherein rhodium is supported, together with an α-alumina particle, on a zirconia-type base material, characterized in that average particle size of the α-alumina particle is 10 nm to 1 μm, and also is smaller than average particle size of the zirconia (ZrO2)-type base material.
대표청구항▼
1. A catalyst composition for exhaust gas purification for purifying nitrogen oxides (NOx), carbon monoxide (CO), and hydrocarbons (HC) in exhaust gas, wherein rhodium (Rh) is supported, together with an α-alumina (Al2O3) particle, on a zirconia (ZrO2)-type base material, wherein average particle si
1. A catalyst composition for exhaust gas purification for purifying nitrogen oxides (NOx), carbon monoxide (CO), and hydrocarbons (HC) in exhaust gas, wherein rhodium (Rh) is supported, together with an α-alumina (Al2O3) particle, on a zirconia (ZrO2)-type base material, wherein average particle size of the α-alumina particle is 10 nm to 1 μm, and is smaller than average particle size of the zirconia-type base material. 2. The catalyst composition for exhaust gas purification according to claim 1, wherein the zirconia-type base material comprises one or more members selected from a group consisting of ceria (CeO2), neodymium oxide (Nd2O3), praseodymium oxide (Pr6O11), lanthanum oxide (La2O3) and yttrium oxide (Y2O3). 3. A catalyst for exhaust gas purification for automobiles, wherein the catalyst composition for exhaust gas purification according to claim 2 is coated on a honeycomb structure substrate, as a catalyst layer. 4. The catalyst composition for exhaust gas purification according to claim 1, wherein content of α-alumina supported on the zirconia-type base material is 5 to 60% by weight. 5. A catalyst for exhaust gas purification for automobiles, wherein the catalyst composition for exhaust gas purification according to claim 3 is coated on type a honeycomb structure substrate, as a catalyst layer. 6. The catalyst composition for exhaust gas purification according to a claim 1, wherein BET specific surface area of α-alumina is 20 m2/g or smaller. 7. A catalyst for exhaust gas purification for automobiles, wherein the catalyst composition according to claim 6 is coated on a honeycomb structure substrate, as a catalyst layer. 8. A catalyst for exhaust gas purification for automobiles, wherein the catalyst composition according to claim 1 is coated on a honeycomb structure substrate, as a catalyst layer. 9. The catalyst for exhaust gas purification for automobiles according to claim 8, being coated with another catalyst layer comprising a noble metal different from rhodium, other than the catalyst layer. 10. The catalyst for exhaust gas purification for automobiles according to claim 9, wherein the noble metal is palladium (Pd) and/or platinum (Pt). 11. The catalyst for exhaust gas purification for automobiles according to claim 10, wherein total coated amount of the catalyst composition is 100 to 350 g/L per unit volume of the honeycomb structure substrate. 12. The catalyst for exhaust gas purification for automobiles according to claim 9, wherein total coated amount of the catalyst composition is 100 to 350 g/L per unit volume of the honeycomb structure substrate. 13. The catalyst for exhaust gas purification for automobiles according to claim 8, wherein total coated amount of the catalyst composition is 100 to 350 g/L per unit volume of the honeycomb structure substrate.
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이 특허에 인용된 특허 (15)
Wan Chung-Zong (Somerset NJ) Tauster Samuel J. (Englishtown NJ) Rabinowitz Harold N. (Upper Montclair NJ), Catalyst composition containing platinum and rhodium components.
Wan Chung-Zong (Somerset NJ) Tauster Samuel J. (Englishtown NJ) Rabinowitz Harold N. (Upper Montclair NJ), Removal of CO, hydrocarbons and NOx with catalyst containing platinum rhodium.
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