Effect of Al Content on the n-Pentane Isomerization of the Solid Superacid Pt-SO42-/ZrO2-Al2O3

被引：3
|
作者：
Song Hua [1 ,2 ]
Dong Peng-Fei [1 ]
Zhang Xu [1 ]
机构：
[1] NE Petr Univ, Coll Chem & Chem Engn, Daqing 163318, Heilongjing Pro, Peoples R China
[2] NE Petr Univ, Heilongjiang Prov Key Lab Chem Engn Oil & Gas, Daqing 163318, Heilongjiang Pr, Peoples R China
来源：
ACTA PHYSICO-CHIMICA SINICA | 2010年 / 26卷 / 08期
关键词：
Solid superacid; Catalyst; SO42-/ZrO2; Isomerization; Al2O3; content; Pt; SULFATED ZIRCONIA; ACID CATALYST; ZRO2;
D O I：
10.3866/PKU.WHXB20100640
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：
Highly active and stable Pt-SO42-/ZrO2Al2O3 solid superacid catalysts were prepared by simultaneously introducing appropriate amounts of Pt and Al2O3 into a SO42-/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. SO42-/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.
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收藏
页码：2229 / 2234
页数：6
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