New three-way catalysts with PT, RH and PD, each supported on a separate support

New three-way catalysts with PT, RH and PD, each supported on a separate support

New catalysts for catalytic convertion of CO, light hydrocarbons and nitrogen oxides comprising a 1-layer/3-parts catalyst and/or a 3-layer catalyst, where Rh is supported on W -doped-TiO2, Pd supported on Y2O3-doped-ZrO2 and Pt supported on SiO2 or gamma -Al2O3 or Y2O3-doped-ZrO2, were found to be...

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Bibliographische Detailangaben
Hauptverfasser: YENTEKAKIS, IOANNIS V, PLIANGOS, CONSTANTINOS A, VERYKIOS, XENOPHON E, PAPADAKIS, EVANGELOS G, VAYENAS, CONSTANTINOS G
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
THEIR RELEVANT APPARATUS
TRANSPORTING
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Beschreibung
Zusammenfassung:New catalysts for catalytic convertion of CO, light hydrocarbons and nitrogen oxides comprising a 1-layer/3-parts catalyst and/or a 3-layer catalyst, where Rh is supported on W -doped-TiO2, Pd supported on Y2O3-doped-ZrO2 and Pt supported on SiO2 or gamma -Al2O3 or Y2O3-doped-ZrO2, were found to be significantly more active and durable than the known commercial ones. The new catalysts require smaller quantities of PGM in order to achieve the same activity as known ones and, in addition, present longer lifetime. They may be used for example for automobile emission control and/or for the treatment of industrial and power generation stations emissions.