【摘要】 采用超声辅助浸渍法制备Na改性Pt/SAPO-11催化剂，采用氨气程序升温脱附，吡啶红外和固体核磁表征催化剂酸性，并通过正十二烷异构化反应评价催化剂活性。表征结果表明，Na的引入降低了Pt/SAPO-11的中强B酸酸量和总酸量。反应结果表明，与未改性的Pt/SAPO-11催化剂相比，引入Na助剂后，催化剂上异构体选择性显著提升，实现了89%的异构体收率。结合反应评价和表征结果，讨论了Na助剂对催化剂上烷烃异构化反应路径的影响。更多还原

【Abstract】 Na-modified Pt/SAPO-11 catalyst was prepared by ultrasonic-assistant impregnation method.The temperature-programmed desorption of ammonia, pyridine-FT-IR and solid-state magic-angle-spinning NMR results reveals that the Na-modification reduces the amount of medium-strong strength Br?nsted acid sites and total acid sites on Pt/SAPO-11 catalysts.The results of the n-dodecane hydroisomerization show that the selectivity of the i-dodecane increased significantly with the modification of Na promoter as compared with the unmodified Pt/SAPO-11 catalyst.An i-dodecane yield of 89% has been obtained on the Pt5 Na/SAPO-11 catalyst.Combined with the results of the reaction and characterization, it was demonstrated that the Na promoter could affect the reaction pathway of n-alkane hydroisomerization on the catalyst.更多还原