Effect of Sn promoter on the performance of Pt-Sn/γ-Al2O3 catalysts for n-dodecane dehydrogenation

被引：1
|
作者：
He S.-B. [1 ]
Bi W.-J. [1 ]
Lai Y.-L. [1 ]
Rong X. [1 ]
Yang X. [1 ]
Sun C.-L. [1 ]
机构：
[1] Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Acad. of Sci.
来源：
Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2010年 / 38卷 / 04期
关键词：
Coking; Dehydrogenation; Long chain paraffin; Pt-Sn catalysts;
D O I：
10.1016/s1872-5813(10)60039-4
中图分类号：
学科分类号：
摘要：
The effect of Sn promoter on the performance of Pt-Sn/γ-Al2O3 catalysts for the long-chain paraffins dehydrogenation to mono-olefins was studied by n-dodecane dehydrogenation. The catalysts were characterized by N2 adsorption-desorption, mercury intrusion porosimetry, CO pulse chemisorption, X-ray photoelectron spectroscopy and thermogravimetric analysis. Results show that the Pt-Sn/γ-Al2O3 catalysts exhibit the optimal catalytic performance when the Sn:Pt (atomic ratio) of the catalyst is 3.While keeping on increasing the amount of Sn, the catalytic dehydrogenation activity of the catalysts is decreased with the formation of Sn0 and Pt-Sn alloy. Moreover, the catalytic stability of the catalysts is enhanced after the addition of Sn. And with the increasing of Sn loading, the selectivity to mono-olefins of the Pt-based γ-Al2O3 catalysts is also greatly increased.
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页码：452 / 457
页数：5
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