Patent ID: 7888278

Claim:
A high temperature stable catalyst support comprising the following crystalline structures: an alumina phase selected from the group consisting of alpha-alumina, theta-alumina and combinations thereof; a rare earth aluminate of a hexaaluminate or hexaaluminate-like structure comprising at least one rare earth metal and having a high molar ratio of aluminum to rare earth metal between 11:1 and 14:1; and a rare earth aluminate of a perovskite or perovskite-like structure comprising the at least one rare earth metal and having a low molar ratio of aluminum to rare-earth metal of less than 2:1, wherein the catalyst support contains not more than 20% of alpha-alumina, and less than 100 wt % to about 1 wt % of the rare earth aluminate with the high molar ratio of aluminum to rare earth metal.