CATALYST FOR PURIFYING EXHAUST GAS
PROBLEM TO BE SOLVED: To provide a catalyst for purifying exhaust gas, especially a catalyst for purifying exhaust gas containing a hydrocarbon absorbing material with the capability of reducing HC emissions. SOLUTION: This catalyst for purifying exhaust gas 1 comprises a base 2, a hydrocarbon absor...
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| creator | TAKI KENICHI YABUSAKI YUJI HIRAI AKIMASA |
| description | PROBLEM TO BE SOLVED: To provide a catalyst for purifying exhaust gas, especially a catalyst for purifying exhaust gas containing a hydrocarbon absorbing material with the capability of reducing HC emissions. SOLUTION: This catalyst for purifying exhaust gas 1 comprises a base 2, a hydrocarbon absorbing layer 3 covering the base 2 and a catalytic layer 4 covering the hydrocarbon absorbing layer 3. In addition, the above catalytic layer 4 comprises a laminate of a first catalytic layer 4a containing a noble metal and a carrier carrying the noble metal and a second catalytic layer 4b containing a noble metal of the same kind as the above noble metal and a carrier carrying the former, with a higher density of the above noble metal than that of the first catalytic layer 4a. COPYRIGHT: (C)2008,JPO&INPIT |
| format | Patent |
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SOLUTION: This catalyst for purifying exhaust gas 1 comprises a base 2, a hydrocarbon absorbing layer 3 covering the base 2 and a catalytic layer 4 covering the hydrocarbon absorbing layer 3. In addition, the above catalytic layer 4 comprises a laminate of a first catalytic layer 4a containing a noble metal and a carrier carrying the noble metal and a second catalytic layer 4b containing a noble metal of the same kind as the above noble metal and a carrier carrying the former, with a higher density of the above noble metal than that of the first catalytic layer 4a. 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| subjects | BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS |
| title | CATALYST FOR PURIFYING EXHAUST GAS |
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