TY - JOUR
T1 - Effect of impregnation sequence on propane dehydrogenation performance of PtSnNa/ZSM-5 catalyst
AU - Liu, Hui
AU - Zhou, Yuming
AU - Zhang, Yiwei
AU - Sheng, Xiaoli
AU - Zhang, Zewu
AU - Zhou, Shijiang
PY - 2013/12/30
Y1 - 2013/12/30
N2 - The effects of the sequence for impregnation of metal precursors on the performance of PtSnNa/ZSM-5 catalyst for propane dehydrogenation to propene were studied in this paper. Some methods such as XRD, TPDA, BET, H2-TPR, XPS, ICP, TEM and hydrogen chemisorption were used to characterize the catalysts. The structure of ZSM-5 zeolite was not destroyed by the introduction of metal components. Meanwhile the different impregnation sequence of metal precursors could affect the behavior of Sn4+ species entering the ZSM-5 channel, and the interaction between platinum and tin species, as well as the degree for reduction of Pt and Sn components. As a result, the prepared catalysts exhibited different reaction activity and selectivity. Compared with the co-impregnation treated catalyst, the catalysts prepared by the sequential impregnation method showed better catalytic activity in propane dehydrogenation, especially the one prepared through impregnation with tin precursor at first. Finally, a model for the effect of impregnation sequence on the distribution of Pt and Sn species in PtSnNa/ZSM-5 catalyst was proposed.
AB - The effects of the sequence for impregnation of metal precursors on the performance of PtSnNa/ZSM-5 catalyst for propane dehydrogenation to propene were studied in this paper. Some methods such as XRD, TPDA, BET, H2-TPR, XPS, ICP, TEM and hydrogen chemisorption were used to characterize the catalysts. The structure of ZSM-5 zeolite was not destroyed by the introduction of metal components. Meanwhile the different impregnation sequence of metal precursors could affect the behavior of Sn4+ species entering the ZSM-5 channel, and the interaction between platinum and tin species, as well as the degree for reduction of Pt and Sn components. As a result, the prepared catalysts exhibited different reaction activity and selectivity. Compared with the co-impregnation treated catalyst, the catalysts prepared by the sequential impregnation method showed better catalytic activity in propane dehydrogenation, especially the one prepared through impregnation with tin precursor at first. Finally, a model for the effect of impregnation sequence on the distribution of Pt and Sn species in PtSnNa/ZSM-5 catalyst was proposed.
KW - Impregnation sequence
KW - Propane dehydrogenation
KW - Propene
KW - PtSnNa/ZSM-5
UR - http://www.scopus.com/inward/record.url?scp=84894218778&partnerID=8YFLogxK
M3 - 文章
AN - SCOPUS:84894218778
SN - 1008-6234
VL - 15
SP - 54
EP - 62
JO - China Petroleum Processing and Petrochemical Technology
JF - China Petroleum Processing and Petrochemical Technology
IS - 4
ER -