Ceramic catalyst body and ceramic carrier

• Main Authors: KONDO JUJI, TANAKA SEIICHI, NAKANISHI TOMOHIKO
• Format: Patent
• Language: English
• Published: 01.05.2002
• Edition: 7
• Subjects: ARTIFICIAL STONE; BLASTING; CEMENTS; CERAMICS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; 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; LIME, MAGNESIA; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; REFRACTORIES; SEPARATION; SLAG; STEAM ENGINES; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF NATURAL STONE; WEAPONS

The present invention improves a ceramic carrier capable of directly supporting a catalyst component and provides a ceramic carrier and a ceramic catalyst body which have high catalyst performance and practical value. According to the present invention, in the ceramic catalyst body 1 having a catalyst component supported on the ceramic carrier 2 of monolith form having a multitude of pores or element capable of directly supporting the catalyst on the surface of cordierite, the quantity of catalyst per unit volume in the middle portion A of the carrier where much gas flows is set to 1.1 times, preferably twice or larger than that of the peripheral portion B. By having more catalyst in the middle portion of the carrier where much gas flows, the purification performance is improved.