摘要:
Disclosed are alumina materials including a barium sulfate, catalyst or adsorbent using the same, in particular, catalyst for exhaust gas purification superior in NOx purification performance, suitable as a catalyst for purifying harmful substances included in exhaust gas discharged from an internal combustion engine of a gasoline vehicle, a diesel vehicle. An alumina material containing a barium sulfate in an amount of 5 to 70% by mass to alumina, wherein average particle size of barium sulfate dispersing in the alumina material is 4 μm or smaller, average particle size of alumina is 50 μm or smaller, and BET specific surface area of the alumina material is 20 to 250 m2/g; a catalyst for exhaust gas purification using the alumina material including a barium sulfate. It is preferable that the alumina material including a barium sulfate is coated onto an integrated structure-type carrier, as a catalyst layer.
摘要:
The present invention is to provide a catalyst composition for exhaust gas purification, which is superior in purification performance for nitrogen oxides (NOx), carbon monoxide (CO) and hydrocarbons (HC) in exhaust gas to be discharged from an internal combustion engine of a gasoline vehicle or the like; and an catalyst for exhaust gas purification for automobiles. The present invention is a catalyst composition for exhaust gas purification for purifying nitrogen oxides, carbon monoxide, and hydrocarbons in exhaust gas, which includes a catalyst composition wherein rhodium is supported, together with an α-alumina particle, on a zirconia-type base material, characterized in that average particle size of the α-alumina particle is 10 nm to 1 μm, and also is smaller than average particle size of the zirconia (ZrO2)-type base material.
摘要:
The present invention is to provide a catalyst composition for exhaust gas purification, which is superior in purification performance for nitrogen oxides (NOx), carbon monoxide (CO) and hydrocarbons (HC) in exhaust gas to be discharged from an internal combustion engine of a gasoline vehicle or the like; and an catalyst for exhaust gas purification for automobiles. The present invention is a catalyst composition for exhaust gas purification for purifying nitrogen oxides, carbon monoxide, and hydrocarbons in exhaust gas, which includes a catalyst composition wherein rhodium is supported, together with an α-alumina particle, on a zirconia-type base material, characterized in that average particle size of the α-alumina particle is 10 nm to 1 μm, and also is smaller than average particle size of the zirconia (ZrO2)-type base material.