Pt在SAPO-11分子筛上的分散性研究

H2-TPR, NH3-TPD, pulse adsorption of hydrogen and H2-O2 titration were employed to analyze and correlate the platinum dispersity on Pt/SAPO-11 catalyst with preparation of the catalyst and performance of skeletal isomerization of n-C12 alkane. It was found that the precursor of metal amine complex and maceration with low metal concentration and multiple maceration are favored to improve the dispersity of platinum on catalyst. The introduction of additives of Mn2+, Sm3+ and Zn2+ and binary metal maceration are feasible to promote the dispersity of metal. In addition, matching of the acidity and metal content is optimum to catalytic performance of Pt/SAPO-11 catalyst.