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

✍ Scribed by Yongzheng Duan; Yuming Zhou; Yiwei Zhang; Xiaoli Sheng; Shijian Zhou; Zewu Zhang

• Book ID: 114337756
• Publisher: Elsevier Science
• Year: 2012
• Tongue: English
• Weight: 338 KB
• Volume: 21
• Category: Article
• ISSN: 1003-9953
• DOI: 10.1016/s1003-9953(11)60356-3

✦ Synopsis

The catalytic properties of PtSn-based catalysts supported on siliceous SBA-15 and Al-modified SBA-15, such as Al-incorporated SBA-15 (AlSBA-15) and alumina-modified SBA-15 (Al 2 O 3 /SBA-15), for propane dehydrogenation were investigated. Al 2 O 3 /SBA-15 was prepared either by an impregnation method using aluminum nitrate aqueous solution, or by the treatment of SBA-15 with a Al(OC 3 H 7 ) 3 solution in anhydrous toluene. N 2 -physisorption, FT-IR spectroscopy, solid-state 27 Al MAS NMR spectroscopy, hydrogen chemisorption, XRF, NH 3 temperature-programmed desorption, X-ray photoelectron spectroscopy and TPO were used to characterize these samples. Among these catalysts, the PtSn-based catalyst supported on Al 2 O 3 /SBA-15, which was grafted with Al(OC 3 H 7 ) 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.