EXHAUST GAS CLEANING CATALYST AND METHOD FOR PRODUCING EXHAUST GAS CLEANING CATALYST

• Main Authors: HORI, Keigo, OKI, Daisuke, KAWANO, Yuya, AONO, Norihiko
• Format: Patent
• Language: English; French; German
• Published: 17.07.2019
• Subjects: 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

The exhaust gas purification catalyst disclosed here is an exhaust gas purification catalyst disposed in the exhaust pipe of an internal combustion engine to purify nitrogen oxides contained in exhaust gas discharged from the internal combustion engine, provided with a silver alumina catalyst comprising at least alumina as a catalyst and silver supported on this alumina, wherein, in the silver alumina catalyst, the ratio of the peak intensity at a wave number of 1595 cmto the peak intensity at a wave number of 1613 cmby the pyridine IR method is at least 0.3, and the carried amount of the silver is 1.0 wt% to 6.0 wt% given 100 wt% as the total amount of the silver alumina catalyst.