CATALYTIC MATERIAL AND CATALYST FOR CLEANING EXHAUST GAS FROM INTERNAL-COMBUSTION ENGINE

• Main Authors: ONO DAIGO, SHIBA SHIGEHARU, NAGANE SEI, SATO TAKAHIRO, KAWASAKI MUTSURO
• Format: Patent
• Language: English
• Published: 14.10.2010
• 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 catalytic material for cleaning exhaust gas from an internal-combustion engine, the catalytic activity of which is restrained from being deteriorated owing to the grain growth of a Pd fine particle and which is hardly deteriorated even in such an exhaust gas atmosphere discharged from a motorbike or the general-purpose internal-combustion engine that the concentration of oxygen in the exhaust gas and those of HC and CO in an unburned gas component are changed considerably and the wind width of A/F becomes very wide, and to provide a catalyst for cleaning exhaust gas from the internal-combustion engine. SOLUTION: The catalytic material for cleaning exhaust gas from the internal-combustion engine is provided with: a carrier consisting of a cerium-zirconium compound oxide containing 45-70 mass% CeO2, 20-45 mass% ZrO2, 2-20 mass% Nd2O3and 1-10 mass% La2O3; and a catalyst component consisting of the metal Pd or Pd oxide deposited on the carrier. The catalyst for cleaning exhaust gas from the internal-combustion engine consists of the catalytic material for cleaning exhaust gas from the internal-combustion engine, which material is deposited on the carrier. COPYRIGHT: (C)2011,JPO&INPIT