Influence of Lanthanum Addition on Catalytic Properties of PtSnK/Al2O3 Catalyst for Isobutane Dehydrogenation

详细信息    查看全文

• 作者：Lihui Wan ; Yuming Zhou ; Yiwei Zhang ; Yongzheng Duan ; Xuan Liu ; Mengwei Xue
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：April 20, 2011
• 年：2011
• 卷：50
• 期：8
• 页码：4280-4285
• 全文大小：796K
• 年卷期：v.50,no.8(April 20, 2011)
• ISSN：1520-5045

文摘

The effect of lanthanum addition on catalytic properties of PtSnK/Al₂O₃ catalyst for isobutane dehydrogenation was investigated. The catalysts were characterized by nitrogen adsorption, H₂ chemisorption, XRF, XRD, XPS, TG, TPO, and NH₃-TPD. Results showed that with the appropriate addition of lanthanum, the platinum dispersion increased, and carbon depositions decreased. The presence of La in the PtSnK/Al₂O₃ catalysts could not only strengthen the Sn鈭扐l₂O₃ interaction, but also stabilize the oxidation states of Sn species, thus increasing the reaction activity and stability. Among the catalysts investigated, PtSnKLa(0.9 wt %)/Al₂O₃ had the best catalytic performance. After reaction for 8 h, the isobutane conversion of 49% was achieved with the corresponding isobutene selectivity of higher than 95%.