Effect of aluminum modification on catalytic properties of PtSn-based catalysts supported on SBA-15 for propane dehydrogenation

Journal of Natural Gas Chemistry Pub Date : 2012-03-01 DOI:10.1016/S1003-9953(11)60356-3

Yongzheng Duan, Yuming Zhou, Yiwei Zhang, Xiaoli Sheng, Shijian Zhou, Zewu Zhang

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引用次数: 20

Abstract

The catalytic properties of PtSn-based catalysts supported on siliceous SBA-15 and Al-modified SBA-15, such as Al-incorporated SBA-15 (A1SBA-15) and alumina-modified SBA-15 (AI₂O₃/SBA-15), for propane dehydrogenation were investigated. AI₂O₃/SBA-15 was prepared either by an impregnation method using aluminum nitrate aqueous solution, or by the treatment of SBA-15 with a Al(OC₃H₇)₃ solution in anhydrous toluene. N₂-physisorption, FT-IR spectroscopy, solid-state ²⁷Al MAS NMR spectroscopy, hydrogen chemisorption, XRF, NH₃ temperature-programmed desorption, X-ray photoelectron spectroscopy and TPO were used to characterize these samples. Among these catalysts, the PtSn-based catalyst supported on AI₂O₃/SBA-15, which was grafted with Al(OC₃H₇)₃, exhibited the best catalytic performance in terms of activity and stability The possible reason was due to the high Pt metal dispersion and/or the strong interactions among Pt, Sn, and the support.

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铝改性对SBA-15负载ptsn基丙烷脱氢催化剂性能的影响

研究了硅质SBA-15和al改性SBA-15负载的ptsn基催化剂，如al掺入SBA-15 (A1SBA-15)和氧化铝改性SBA-15 (AI2O3/SBA-15)对丙烷脱氢的催化性能。用硝酸铝水溶液浸渍法制备AI2O3/SBA-15，用Al(OC3H7)3溶液在无水甲苯中处理SBA-15。利用n2物理吸附、FT-IR光谱、固态27Al MAS NMR光谱、氢化学吸附、XRF、NH3程序升温解吸、x射线光电子能谱和TPO对样品进行表征。其中，以Al(OC3H7)3接枝的AI2O3/SBA-15为载体的ptsn基催化剂在活性和稳定性方面表现出最好的催化性能，这可能是由于Pt金属的高度分散和/或Pt、Sn与载体之间的强相互作用所致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Natural Gas Chemistry 化学-工程：化工

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0.00%

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审稿时长

2 months