METHOD FOR SUPPORTING CATALYTIC COMPONENT OF MONOLITHIC CATALYST FOR PURIFYING EXHAUST GAS

PURPOSE:To contrive to shorten a catalyst supporting process and to enhance the efficiency thereof, by arranging a doughnut shaped bubbling pipe, which has a diameter nearly equal to or smaller than that of a monolithic catalyst and is provided with a large number of small apertures, in a catalytic...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUMOTO SHINICHI, KIMURA SHIROU, SOFUE KAZUAKI
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:	PURPOSE:To contrive to shorten a catalyst supporting process and to enhance the efficiency thereof, by arranging a doughnut shaped bubbling pipe, which has a diameter nearly equal to or smaller than that of a monolithic catalyst and is provided with a large number of small apertures, in a catalytic component supporting solution. CONSTITUTION:An aqueous aluminum nitrate solution and ion exchanged water is added to an alumina sol under stirring to prepare a suspension and a gamma-alumina powder is further added to said suspension to prepare a slurry. A columnar monolithic carrier 1 is immersed in said slurry and, after drawn up to remove the excessive slurry, baked at 700 deg.C for 2hr. Next, the monolithic carrier 1 having an activated alumina layer formed thereto is immersed in a catalytic component supporting tank 2 to be fixed directly above a bubbling pipe 5 while compressed air is supplied to said bubbling pipe 5 to allow air bubbles 6 to pass. Subsequently, the treated one is drawn up to remove excessive moisture to obtain a monolithic catalyst.