The isomerization performance of SBA-1 and Zr-SBA-1 supported Pt-H3PW12O40 catalysts

被引：0

作者：

Xu Y. ^{[1
]}

Qi Y. ^{[2
]}

Li S. ^{[2
]}

机构：

[1] School of Chemistry and Chemical Engineering, Henan University of Technology

[2] State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences

来源：

Shiyou Xuebao, Shiyou Jiagong/Acta Petrolei Sinica (Petroleum Processing Section) | 2011年 / 27卷 / 04期

关键词：

Isomerization; N-pentane; SBA-1; Support; Supported catalyst;

D O I：

10.3969/j.issn.1001-8719.2011.04.006

中图分类号：

学科分类号：

摘要：

SBA-1 and Zr-SBA-1 mesoporous molecular sieves with cubic phase were synthesized in-situ under strong acid condition with tetraethyl orthosilicate as Si source, isopropyl zirconium oxide as Zr source and cetyltriethyl ammonium bromide as template. SBA-1 and Zr-SBA-1 supported Pt-H3PW12O40 (2%Pt-30%HPA/SBA-1 and 2%Pt-30%HPA/Zr-SBA-1) catalysts were prepared by co-impregnation method. XRD, FT-IR and N2 adsorption-desorption were used to characterize the relevant samples. The catalytic isomerization activities of the prepared catalysts were investigated by means of micro-type fixed bed reactor. The isomerization performance of the Pt-HPA catalysts supported on three kinds of SiO2 with different skeletal structures (SBA-1, MCM-41, SiO2) were compared and analyzed. The experimental results showed that the 2%Pt-30%HPA/SBA-1 possessed the highest catalytic activity in n-pentane isomerization, in which the n-pentane conversion and iso-pentane selectivity were 65% and 96%, respectively, at the end point of the reaction (120 min). When the Zr was doped into the skeletal structure of SBA-1, the catalytic activity of 2%Pt-30%HPA/Zr-SBA-1 decreased evidently. But nearly no obvious effect of the doping amount of Zr on the catalytic activity was found. The sequence of the catalytic isomerization activity of the supported 2%Pt-30%HPA catalysts with different SiO2 supports was the same as that of the specific surface areas of SiO2 supports. It was inferred that the specific surface area of the support was an important factor to the catalytic isomerization activity of relevant supported catalyst.

引用

页码：532 / 536

页数：4

共 12 条

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