Al含量对Pt-S2O82-/ZrO2-Al2O3型固体超强酸催化剂异构化性能的影响

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (7): 1426.

Al含量对Pt-S₂O₈^2-/ZrO₂-Al₂O₃型固体超强酸催化剂异构化性能的影响

宋华, 董鹏飞, 张旭

东北石油大学化学化工学院, 大庆 163318

收稿日期:2009-08-04 出版日期:2010-07-10 发布日期:2010-07-10
通讯作者: 宋华, 女, 教授, 博士生导师, 从事工业催化和绿色氧化方面的研究. E-mail songhua@dqpi.edu.cn
基金资助:
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.

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.

摘要/Abstract

摘要：

通过向S₂O₈^2-/ZrO₂催化剂中同时引入适量的Pt和Al₂O₃, 制备出了具有较高催化性能和高稳定性的Pt-S₂O₈^2-/ZrO₂-Al₂O₃型固体超强酸催化剂. 以正戊烷异构化反应为探针, 考察了Al含量对催化剂的异构化性能的影响, 并采用XRD, BET, FTIR, TPR, TG-DTA, NH₃-TPD和ICP手段对催化剂进行了表征. 结果表明, Al能够延迟ZrO₂的晶化温度, 抑制硫的分解; Al能够增加催化剂的比表面积, 增强硫氧键的结合, 提高催化剂的还原性能, 增加催化剂的酸强度和酸总量. 当Al₂O₃质量分数为2.5%时, Pt-S₂O₈^2-/ZrO₂-Al₂O₃固体超强酸催化剂的催化活性最高, 正戊烷异构化收率可达60.02%, 选择性在98.2％以上.

关键词: 固体超强酸; 催化剂; S2O2-8/ZrO2; 异构化; Al2O3含量

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:

宋华, 董鹏飞, 张旭. Al含量对Pt-S₂O₈^2-/ZrO₂-Al₂O₃型固体超强酸催化剂异构化性能的影响. 高等学校化学学报, 2010, 31(7): 1426.

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

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Al含量对Pt-S₂O₈^2-/ZrO₂-Al₂O₃型固体超强酸催化剂异构化性能的影响

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

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