Dehydrogenation of propane over high silica *BEA type gallosilicate (Ga-Beta)
Propane dehydrogenation (PDH) is one of the most promisng candidates of propylene production process to meet the growing demand of propylene in the future. There is an urgent need to develop catalysts for PDH. In this work, we have synthesized high silica Ga-Beta as a new candidate of the catalyst from dealuminated zeolite using dry gel conversion method. The high silica Ga-Beta wih Si/Ga ratio up to 177 can be synthesized. On the PDH reaction, synthesized Ga-Beta showed the highest propane conversion and the highest propylene yield in Ga-based zeolites. The combination of Ga species incorporated into zeolite frameworks, large microporosity and Brønsted acidity is likely to lead to the excellent catalytic peformance of the Ga-Beta. Moreover, the Ga-Beta with higher Si/Ga ratio shows longer catalyst lifetime on PDH reaction since coke deposition rate was depressed by the decrease of the acid amount. This work provides new insights for PDH reaction over Ga based zeolite catalysts, which would contribute to the progress in activation and transformation of light alkenes to value-added chemicals.