Diesel particulate filter and exhaust emission control system
First Claim
Patent Images
1. A diesel particulate filter, comprising:
- a carrier which has filter functions; and
a perovskite type complex oxide supported by the carrier and expressed by the following formula (1);
La1−
xBaxMnyFe1−
yO3
(1) (where 0<
x<
0.7 and 0≦
y≦
1 in formula (1) above).
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Accused Products
Abstract
To provide a diesel particulate filter that can lower the PM combustion start temperature and use material containing Si for a carrier. The carrier which has a filter function is allowed to support a perovskite type complex oxide expressed by formula (1):
La1−xBaxMnyFe1−yO3 (1) (where 0<x<0.7 and 0≦y≦1).
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Citations
12 Claims
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1. A diesel particulate filter, comprising:
-
a carrier which has filter functions; and
a perovskite type complex oxide supported by the carrier and expressed by the following formula (1);
La1−
xBaxMnyFe1−
yO3
(1)(where 0<
x<
0.7 and 0≦
y≦
1 in formula (1) above). - View Dependent Claims (2, 3, 4, 5, 6)
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7. An exhaust emission control system installed in an exhaust gas passage of a diesel engine, comprising:
-
a diesel particulate filter that comprises a carrier which has filter functions and a perovskite type complex oxide supported by the carrier and expressed by the following formula (1); and
a carrier which supports an oxidation catalyst installed separately from the diesel particulate filter;
La1−
xBaxMnyFe1−
yO3
(1)(where 0<
x<
0.7 and 0≦
y≦
1 in formula (1) above).
-
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8. An exhaust emission control system installed in an exhaust gas passage of a diesel engine, comprising:
-
a diesel particulate filter that comprises a carrier which has filter functions and a perovskite type complex oxide supported by the carrier and expressed by the following formula (1); and
a carrier which supports an oxidation catalyst installed separately from the diesel particulate filter;
La1−
xBaxMnyFe1−
yO3
(1)(where 0.1<
x<
0.6 and 0≦
y≦
1 in formula (1) above).
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9. An exhaust emission control system installed in an exhaust gas passage of a diesel engine, comprising:
-
a diesel particulate filter that comprises a carrier which has filter functions and a perovskite type complex oxide supported by the carrier and expressed by the following formula (1); and
a carrier which supports an oxidation catalyst installed separately from the diesel particulate filter;
La1−
xBaxMnyFe1−
yO3
(1)(where 0<
x<
0.7 and y=0 in formula (1) above).
-
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10. An exhaust emission control system installed in an exhaust gas passage of a diesel engine, comprising:
-
a diesel particulate filter that comprises a carrier which has filter functions and a perovskite type complex oxide supported by the carrier and expressed by the following formula (1); and
a carrier which supports an oxidation catalyst installed separately from the diesel particulate filter;
La1−
xBaxMnyFe1−
yO3
(1)(where 0<
x<
0.7 and y=1 in formula (1) above).
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11. An exhaust emission control system installed in an exhaust gas passage of a diesel engine, comprising:
-
a diesel particulate filter that comprises a carrier which has filter functions and a perovskite type complex oxide supported by the carrier and expressed by the following formula (1), wherein the perovskite type complex oxide exists in a particulate form, fine pores are formed in the carrier, and the particle size of the perovskite type complex oxide is smaller than the fine pore diameter of the carrier; and
a carrier which supports an oxidation catalyst installed separately from the diesel particulate filter;
La1−
xBaxMnyFe1−
yO3
(1)(where 0<
x<
0.7 and 0≦
y≦
1 in formula (1) above).
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-
12. An exhaust emission control system installed in an exhaust gas passage of a diesel engine, comprising:
-
a diesel particulate filter that comprises a carrier which has filter functions, a perovskite type complex oxide supported by the carrier and expressed by the following formula (1), and an oxidation catalyst supported by the carrier containing at least one kind chosen from Pt, Rh, and Pd; and
a carrier which supports an oxidation catalyst installed separately from the diesel particulate filter;
La1−
xBaxMnyFe1−
yO3
(1)(where 0<
x<
0.7 and 0≦
y≦
1 in formula (1) above).
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Specification