CATALYST FOR CLEANING EXHAUST GAS

PROBLEM TO BE SOLVED: To efficiently reduce and clean occluded NOx by short-time rich spiking. SOLUTION: The pores of a coat layer are formed so that pores with a pore size of 0.1-20 μm occupy 60% or more of the whole pore volume and pores with a pore size of 10-20 μm occupy 20% or more of the whole...

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Bibliographische Detailangaben
Hauptverfasser:	SAIKI MOTOHISA, MATSUNAGA SHINICHI, SENDA KOJI, HACHISUGA ICHIRO, TSUJI RYUSUKE
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY ENGINE PLANTS IN GENERAL GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION STEAM ENGINES THEIR RELEVANT APPARATUS TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To efficiently reduce and clean occluded NOx by short-time rich spiking. SOLUTION: The pores of a coat layer are formed so that pores with a pore size of 0.1-20 μm occupy 60% or more of the whole pore volume and pores with a pore size of 10-20 μm occupy 20% or more of the whole pore volume. The pore size of the pores of the coat layer become 10-2,000 times as compared with a conventional coat layer and the diffusion speed of gas through the pores also becomes 10-2,000 times. Therefore, exhaust gas can reach the interior of the coat layer even by short-time rich spiking. Since a noble metal chemical solution is infiltrated into the pores, a noble metal can be supported on the coat layer up to the interior thereof.