Catalyst materials
AssigneeBASF SE
InventorsShau-Lin F. Chen, Gary A. Gramiccioni, Wiley Feng, Eric An, Scott Zhao
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Abstract
A catalyst material including a catalyst carrier including a porous alumina support and a hindrance layer on the alumina support, the hindrance layer comprising one or more of a sulfate, carbonate, hydroxide, or oxide of barium, strontium, or calcium is described. The catalyst carrier further includes a rare earth oxide. The catalyst material can further comprise a platinum group metal. The catalyst material is useful for methods and systems of abating pollutants from automotive exhaust gas.
Claims25
A catalyst material comprising a catalyst carrier including porous alumina support particles having a hindrance layer on the alumina support particles, the hindrance layer comprising a sulfate, carbonate, oxide or hydroxide of one or more of barium, strontium, and calcium, the catalyst carrier further including a rare earth oxide, wherein the hindrance layer is effective to prevent the rare earth oxide from forming a complex with the alumina support particles.
Dependencies are inferred from the claim text.