The deactivation characteristics of platinum catalysts supported on $\gamma$-alumina were investigated for the hydrogenolysis of cyclopropane at 0℃, 25℃ and 50℃. The dispersions of the platinum particles were measured by the hydrogen chemisorption, and the adsorption of cyclopropane were also studied.
The reactivities and the deactivation rates had different features within the temperature range studied. The activity was high at a higher temperature, while the deactivation was found to be the fastest at 0℃ and the slowest at 25℃.
The turnover numbers and the deactivation rates were almost the same for the fresh catalysts regardless of the platinum loadings but the activities of the regenerated catalysts were higher at a lower platinum loading.