Patent ID: 8507404

Claim:
A regenerable sulfur oxides trap catalyst product composition containing adsorbed sulfur and made according to a process comprising: providing a fresh or regenerated sulfur oxides trap catalyst composition comprising a Mn—La—Zr oxide on a catalyst support (S), wherein the catalyst support (S) is selected from the group consisting of alumina, stabilized gamma alumina with rare earth components, MCM-41, zeolites, silica, magnesia, zirconia, ceria, ceria-zirconia, titania, titania-zirconia, and combinations thereof; exposing the sulfur oxides trap catalyst composition to a combustion source containing SO x under lean exhaust conditions sufficient for the sulfur oxides trap catalyst to adsorb the SO x by converting a Mn—La—Zr oxide site into a Mn—La—Zr sulfate, the conditions comprising an adsorption temperature from 200° C. to 600° C. and an oxidative environment, thus forming a regenerable sulfur oxides trap catalyst product composition containing adsorbed sulfur, wherein at least one of the following are satisfied: the Mn—La—Zr oxide comprises from 1 wt % to 25 wt % Mn, from 1 wt % to 10 wt % La, from 20 wt % to 60 wt % Zr, and the remaining wt % oxygen; the Mn—La—Zr oxide further comprises yttrium, cerium, lithium, potassium, or combinations thereof; and the Mn—La—Zr oxide is supported on alumina in an amount from 5 wt % to 90 wt %.