CATALYST FOR EXHAUST GAS PURIFICATION AND SYSTEM FOR EXHAUST GAS PURIFICATION

• Main Authors: TSUJI MAKOTO, SASAKI KOKICHI, IMAI HIROTO, AONO NORIHIKO
• Format: Patent
• Language: English; Japanese
• Published: 11.07.2016
• 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

PROBLEM TO BE SOLVED: To provide a system that purifies and reduces NOx by supplying hydrocarbon (fuel or the like) to exhaust gas of a Diesel engine and others, and a catalyst which can be suitably used.SOLUTION: A catalyst 1 comprises a base material and a catalyst layer disposed on the base material, where the catalyst layer has a first carrier, palladium carried on the first carrier, and first alkali metal or alkaline earth metal forming a composite with palladium, and also has second alkali metal or alkaline earth metal forming no composite with palladium. There is also provided a system using the catalyst.SELECTED DRAWING: Figure 1 【課題】ディーゼルエンジン等の排気ガスに対し、炭化水素（燃料等）を供給することでＮＯｘを還元浄化するシステム、及び好適に使用することのできる触媒の提供。【解決手段】基材及び基材上に配置された触媒層を含み、触媒層が、第１の担体、第１の担体に担持したパラジウム、パラジウムと複合化された第１のアルカリ金属又はアルカリ土類金属を有し、かつ、パラジウムと複合体を形成していない第２のアルカリ金属又はアルカリ土類金属を更に含む触媒１、及び該触媒を用いたシステム。【選択図】図１