Effect of different supports on performance of Co-based catalysts in propane dehydrogenation
Two-dimensional hexagonal mesoporous SBA-15 molecular sieves are successfully prepared through the hydrothermal synthesis method.Subsequently,2.0％Co is loaded onto SBA-15,SiO2,Al2O3,SBA-15S(commercial SBA-15),ZSM-5,and SAPO-34,respectively via the equal-volume impregnation method.These catalysts are employed in propane dehydrogenation to propylene to evaluate their catalytic performances and structure-activity relationships.It is indicated by the results that Co/SBA-15 exhibits the best stability and catalytic performance,over which the maximum propane conversion rate reaches 45.45％,the propylene selectivity reaches 87.25％,and the maximum propylene yield is 39.66％.Co/SBA-15 catalyst possesses unique textural properties that ensure the adsorption and activation of reactants while prevent pore blockage,facilitating rapid diffusion of reactants on its surface and demonstrating the most superior catalytic performance.
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