Process for producing exhaust-gases-purifying catalyst

A process for producing an exhaust-gases-purifying catalyst includes the steps of loading an NOx adsorbent on a porous support, carbonating the porous support with the NOx adsorbent loaded, thereby converting the NOx adsorbent into carbonate, and loading a noble metal catalyst ingredient on the poro...

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Bibliographische Detailangaben
1. Verfasser:	MURAMOTO, RIEMI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS THEREOF GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	A process for producing an exhaust-gases-purifying catalyst includes the steps of loading an NOx adsorbent on a porous support, carbonating the porous support with the NOx adsorbent loaded, thereby converting the NOx adsorbent into carbonate, and loading a noble metal catalyst ingredient on the porous support with the carbonate loaded. The process can produce an exhaust-gases-purifying catalyst on which the NOx adsorbent and the noble metal catalyst ingredient are loaded in large amounts and which can stably and efficiently purify NOx during the fuel-lean side (i.e., in the oxygen-rich atmospheres) driving.