Al-promoted Pt/SO42-/ZrO2 with low sulfate content for n-heptane isomerization

被引：25

作者：

Yang, Ying-Chieh ^{[1
,2
]}

Weng, Hung-Shan ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 701, Taiwan

[2] CPC Corp, Refining & Mfg Res Inst, Chiayi 600, Taiwan

来源：

APPLIED CATALYSIS A-GENERAL | 2010年 / 384卷 / 1-2期

关键词：

Sulfated zirconia; Al- and Pt-promoted; Sulfur content; n-Heptane isomerization; Selectivity; CATALYTIC-ACTIVITY; BUTANE ISOMERIZATION; ZIRCONIA CATALYSTS; HEXANE HYDROISOMERIZATION; SKELETAL ISOMERIZATION; PLATINUM; ALUMINA; ALKANES; CALCINATION; BEHAVIORS;

D O I：

10.1016/j.apcata.2010.06.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

To reduce the occurrence of cracking reactions and obtain high activity for n-heptane isomerization, we performed this study, aimed at improvements of the Al-promoted Pt/SO42-/ZrO2 (Pt/SZ) catalyst. The effect of sulfur content was studied and it was found that lowering sulfate content in the Al-promoted Pt/SZ resulted in remarkably enhanced selectivity towards iso-C-7 formation from 25% up to 83% compared with Pt/SZ without a loss of activity. The results of catalyst characterizations revealed that the tetragonal phase of ZrO2 and its acidity were responsible for the higher activity, and that aluminum helped to stabilize the tetragonal phase in Al-promoted Pt/SZ and hence maintained catalytic activity at low sulfate content, while the low acidity and high Pt dispersion resulted in a high ratio of metal sites to acid sites ;and hence benefited a higher selectivity for iso-C-7. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：94 / 100

页数：7

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