Figure 1.

Conversion of propane (X, green) and selectivity (S, blue) for propene during PDH on the Al₂O₃ support, Pt, 3Ga, Pt3Ga, and Pt3GaK catalysts for each of the eight successive dehydrogenation cycles. The exact values of X and S for the first, second, and eighth cycle are summarized in Table 1. Evidently, both Pt and Ga are required to obtain a highly active selective and stable propane dehydrogenation catalyst.