Review on zeolite confined catalysts for propane dehydrogenation
In response to the Dual Carbon Targets,propane direct dehydrogenation technology has been rapidly applied in recent years.The development of alternative catalysts is a core issue in the development of novel processes.Zeolites,capable of encapsulating metal clusters within the pores or anchoring them on the framework,have become an ideal support for preparing highly-efficient and stable dehydrogenation catalysts.The synthesis methodologies for zeolite-confined catalysts,including those based on platinum,rhodium,zinc,cobalt,have been systematically described according to their different active centers.Research progress on the interactions between metal nanoclusters and zeolite frameworks,as well as their catalytic mechanisms,has been reviewed.The limitations of zeolite-confined catalysts,such as key component loss at high temperature and active center aggregation,have been identified.Strategies to strengthen the interaction between metals and zeolite frameworks have been proposed.It is prospected that,in order to accelerate industrial application of zeolite-confined catalysts,further research is necessary to be conducted on both fundamental scientific issues and scaling up of the catalysts suitable for industrial conditions.
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