高等学校化学学报

高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (1): 1.

• 研究快报 • 上一篇    下一篇

胶溶法制备铈锆镧共改性氧化铝的性质及催化性能

  

  1. 四川大学化学学院, 绿色化学与技术教育部重点实验室,  成都   610064
  • 收稿日期:2010-08-17 修回日期:2010-11-22 出版日期:2011-01-10 发布日期:2010-12-11
  • 通讯作者: 龚茂初 E-mail:nic7501@scu.edu.cn
  • 基金资助:

    国家自然科学基金;国家自然科学基金

  1. Key Laboratory of Green Chemistry & Technology,  Ministry of Education, College of Chemistry,  Sichuan University, Chengdu 610064,  China
  • Received:2010-08-17 Revised:2010-11-22 Online:2011-01-10 Published:2010-12-11
  • Contact: GONG Mao-Chu E-mail:nic7501@scu.edu.cn
  • Supported by:

    National Natural Science Foundation of China;National Natural Science Foundation of China

PDF (PC)

被引次数

8

关键词: γ-氧化铝, 铈锆复合氧化物, 氧化镧, Pt-Rh型催化剂, C3H8

Abstract: CeO2-ZrO2-La2O3-Al2O3（CZLA）samples with different CeO2, ZrO2 and La2O3 contents were prepared by peptizing method. The CZLA samples were characterized by X-ray diffraction (XRD) and N2 adsorption-desorption. The low Pt-Rh content catalysts were prepared by using OSM（Ce0.4Zr0.4Y0.1La0.1O1.9）and CZLA samples as the support, and the catalytic performance was investigated. N2 adsorption-desorption results showed that CZLA sample with 2% La2O3 maintained a highest specific surface area of 97.10 m2?g-1 when aged at 1100℃ for 5 h. After calcination at 1000℃ for 5h, XRD results revealed that both CZLA samples were γ-alumina, lanthanum existed in a dispersed phase, while CZ existed as solid solution in alumina. Activity tests showed that the catalyst which supported by CZLA sample with 2% La2O3 showed an excellent catalytic performance. Its light-off temperature was 249oC, and full conversion temperature was 286oC for C3H8.

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