Effect of Al Contents on the Isomerization Performance of Solid Superacid Pt-S2O2-8/ZrO2-Al2O3

Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (7): 1426.

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Effect of Al Contents on the Isomerization Performance of Solid Superacid Pt-S2O2-8/ZrO2-Al2O3

SONG Hua*, DONG Peng-Fei, ZHANG Xu

College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, China

Received:2009-08-04 Online:2010-07-10 Published:2010-07-10
Contact: SONG Hua. E-mail songhua@dqpi.edu.cn
Supported by:
中国石油天然气股份有限公司科技风险创新研究项目(批准号: 07-06D-01-04-03-02)资助.

Abstract

Abstract:

High catalytic activity and stability Pt-S₂O₈^2-/ZrO₂-Al₂O₃ solid superacid catalysts were prepared by simultaneously introducing the appropriate amount of Pt and Al₂O₃ into S₂O₈^2-/ZrO₂ catalyst. The effects of Al contents on the performance of catalysts was studied by n-pentane isomerization as a probe reaction and the catalysts were characterized by XRD, BET, FTIR, TPR, TG-DTA, NH₃-TPD and ICP etc. The results show that Al can delay crystallization temperature of the ZrO₂, inhibit the decomposition of sulfur. Al can also increase the surface area of catalyst, strengthen the combination between S and O key, improve the redox performance of the catalyst and increase acid strength and total acid of catalyst. With the mass fraction of Al₂O₃ is 2.5%, the catalytic activity of Pt-S₂O₈^2-/ZrO₂-Al₂O₃ solid superacid catalysts is the best. The isopentane yield can reach 66.2% and the selective is larger than 98.2％.

Key words: Solid superacid; Catalyst; S2O2-8/ZrO2; Isomerization; Al2O3 content

TrendMD:

SONG Hua*, DONG Peng-Fei, ZHANG Xu. Effect of Al Contents on the Isomerization Performance of Solid Superacid Pt-S2O2-8/ZrO2-Al2O3[J]. Chem. J. Chinese Universities, 2010, 31(7): 1426.

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Effect of Al Contents on the Isomerization Performance of Solid Superacid Pt-S2O2-8/ZrO2-Al2O3

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