摘要:
A method for purifying an oxygen rich exhaust gas by simultaneously removing the carbon monoxide, hydrocarbons, and nitrogen oxides contained in the exhaust gas, which comprises: bringing the oxygen rich exhaust gas into contact with an exhaust gas purifying catalyst comprised of (i) at least one noble metal selected from the group consisting of platinum and palladium (ii) barium, and (iii) at least one metal selected from the group consisting of alkali metals, iron, nickel, cobalt and magnesium, supported on a carrier composed of a porous substance.
摘要:
A catalyst for purifying exhaust gases includes a porous support, at least one catalyst ingredient selected from Pt and Pd, and additional ingredients including (1) at least two rare-earth elements including La, (2) at least one rare-earth element including La and at least one transition element selected from Fe, Ni, Co and Mn, (3) at least two alkali metals, (4) at least one alkali metal and at least one rare-earth element including La, (5) at least one alkali metal and at least one transition element selected from Fe, Ni, Co and Mn, (6) at least two alkaline-earth metals, (7) at least one alkaline-earth metal and at least one rare-earth element including La, or (8) Ba, Li, La, Ce and Zr. A process for purifying an exhaust gas, by contacting the catalyst with an exhaust gas, is also provided.
摘要:
A method for purifying an oxygen rich exhaust gas by simultaneously removing the carbon monoxide, hydrocarbons, and nitrogen oxides contained in the exhaust gas, which comprises: bringing the oxygen rich exhaust gas into contact with an exhaust gas purifying catalyst comprised of (i) at least one noble metal selected from the group consisting of platinum and palladium (ii) barium, and (iii) at least one metal selected from the group consisting of alkali metals, iron, nickel, cobalt and magnesium, supported on a carrier composed of a porous substance.
摘要:
A catalyst for purifying exhaust gases includes a porous support, at least one catalyst ingredient selected from Pt and Pd, and additional ingredients including (1) at least two rare-earth elements including La, (2) at least one rare-earth element including La and at least one transition element selected from Fe, Ni, Co and Mn, (3) at least two alkali metals, (4) at least one alkali metal and at least one rare-earth element including La, (5) at least one alkali metal and at least one transition element selected from Fe, Ni, Co and Mn, (6) at least two alkaline-earth metals, (7) at least one alkaline-earth metal and at least one rare-earth element including La, or (8) Ba, Li, La, Ce and Zr. A process for purifying an exhaust gas, by contacting the catalyst with an exhaust gas, is also provided.
摘要:
An improved cluster-supporting catalyst and a method for producing the same are provided. The cluster-supporting catalyst of the present invention comprises heteroatom-removed zeolite particles (20), and catalyst metal clusters (16) supported within the pores of the heteroatom-removed zeolite particles. The method of the present invention for producing a cluster-supporting catalyst includes the following steps: providing a dispersion liquid containing a dispersion medium and the heteroatom-removed zeolite particles (20) dispersed in the dispersion medium; and in the dispersion liquid, forming catalyst metal clusters (16) having a positive charge, and supporting the catalyst metal clusters within the pores of the heteroatom-removed zeolite particles through an electrostatic interaction.
摘要:
Cluster-supporting catalyst having an improved heat resistivity, and method for producing the same are provided. The cluster-supporting catalyst of the present invention comprises boron-substitute zeolite particles (20), and catalyst metal clusters (16) supported within the pores of the boron-substitute zeolite particles. The method of the present invention for producing a cluster-supporting catalyst, includes the following steps: providing a dispersion liquid containing a dispersion medium and boron-substitute zeolite particles (20) dispersed in the dispersion medium; and in the dispersion liquid, forming catalyst metal clusters (16) having a positive charge, and supporting the catalyst metal clusters on the acid sites within the pores of the boron-substitute zeolite particles through an electrostatic interaction.