Citation: SONG Hua, DONG Peng-Fei, ZHANG Xu. Effect of Al Content on the n-Pentane Isomerization of the Solid Superacid Pt-SO^2-₄ /ZrO₂-Al₂O₃[J]. Acta Physico-Chimica Sinica, ;2010, 26(08): 2229-2234. doi: 10.3866/PKU.WHXB20100640 shu

Effect of Al Content on the n-Pentane Isomerization of the Solid Superacid Pt-SO^2-₄ /ZrO₂-Al₂O₃

SONG Hua ^1,2, ,
DONG Peng-Fei ¹ ,
ZHANG Xu ¹

1.
1. College of Chemistry and Chemical Engineering, Daqing Petroleum Institute, Daqing 163318, Heilongjing Province, P. R. China;
2. Heilongjiang Provincial Key Laboratory of Chemical Engineering of Oil and Gas, Daqing Petroleum Institute, Daqing 163318, Heilongjiang Province, P. R. China

Received Date: 23 December 2009
Available Online: 13 May 2010
Fund Project: 中国石油天然气股份有限公司科技风险创新基金(07-06D-01-04-03-02)资助项目 (07-06D-01-04-03-02)

Highly active and stable Pt-SO^2-₄ /ZrO₂-Al₂O₃ solid superacid catalysts were prepared by simultaneously introducing appropriate amounts of Pt and Al2O3 into a SO^2-₄ /ZrO₂ catalyst. The effect of Al content on the performance of the catalysts was studied using n-pentane isomerization as a probe reaction and the catalysts were characterized by X-ray diffraction (XRD), specific surface area measurements (BET), infrared (IR) spectroscopy, temperature-programmed reduction (TPR), thermogravimetry-differential thermal analysis (TG-DTA), and NH₃ temperature-programmed desorption (NH₃-TPD). The results show that Al can increase the crystallization temperature of ZrO₂ and inhibit the decomposition of sulfur. Al can also increase the surface area of the catalyst, strengthen the combination between S and O, improve the redox performance of the catalyst and increase the acid strength and the acidity of the catalyst. The catalytic activity of the Pt-SO^2-₄ /ZrO₂-Al₂O₃ solid superacid catalyst with a Al₂O₃ mass fraction of 5.0% was found to be the best. The isopentane yield was stable above 52.0% and the selectivity was higher than 98.2% within 100 h.
- Solid superacid,
- Catalyst,
- SO^2-₄ /ZrO₂,
- Isomerization,
- Al₂O₃ content,
- Pt
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Effect of Al Content on the n-Pentane Isomerization of the Solid Superacid Pt-SO2-4 /ZrO2-Al2O3

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通讯作者: 陈斌, bchen63@163.com

Effect of Al Content on the n-Pentane Isomerization of the Solid Superacid Pt-SO^2-₄ /ZrO₂-Al₂O₃