CATALYST FOR EXHAUST GAS PURIFICATION AND METHOD FOR PRODUCING THE SAME, AND EXHAUST GAS PURIFICATION FILTER AND PURIFICATION METHOD

• Main Authors: SOFUE YUICHI, SENDA KOJI, NIINA YUSUKE, OGAWARA SEIJI, KIKUKAWA MASASHI, YAMAZAKI KIYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 05.10.2017
• 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 catalyst for exhaust gas purification that can achieve a sufficiently high PM oxidation activity even in a temperature range lower than that at which the oxidation removal of PM is aimed.SOLUTION: Provided is a catalyst for exhaust gas purification, characterized in that an amorphous substance containing silver (Ag) and phosphorus (P) is supported on a carrier, and the peak height ratio (P2/P1) of the crystalline silver phosphate peak P1 and the amorphous silver phosphate peak P2 in Raman spectroscopic measurement is 0.8 or more.SELECTED DRAWING: None 【課題】 ＰＭの酸化除去を目的とする温度としてはより低い温度領域でも十分に高いＰＭ酸化活性を発揮することが可能な排ガス浄化用触媒を提供すること。【解決手段】 銀（Ａｇ）及びリン（Ｐ）を含有する非晶質物質が担体に担持されており、ラマン分光測定において結晶性リン酸銀のピークＰ１と非晶質リン酸銀のピークＰ２とのピーク高さ比（Ｐ２／Ｐ１）が０．８以上であることを特徴とする排ガス浄化用触媒。【選択図】 なし