Study on catalyst carrier nano-α-alumina with high specific surface area

Abstract

A nano-alumina with high specific area was prepared using a homogeneous precipitation method with titanium dioxide and barium oxide as modifying additives. Results showed that 5 wt% TiO₂ or BaO added in the alumina gels can decrease the particle size and increase the specific area, but excessive TiO₂ or BaO could deteriorate the properties of ?-Al₂O₃.

References

1. Wen H L Chen Y Y Yen F S Huang C Y Size characterizationof θ- and α-Al₂O₃ crystallites during phase transformationNanostructured Materials 1999 11(1)89101. doi:10.1016/S0965‐9773(99)00022‐7
2. Wu Z H Preparationof nanoparticle alumina and its application in catalysisIndustrial Catalysis 2004 12(2)3539 (in Chinese)
3. Zhu J F Zhu Y Q The influence of preparationconditions of Al₂O₃-TiO₂Chinese Journal of inorganicchemistry 1999 15(4)429434 (in Chinese)
4. Shi W He A D Chen X Y Chen J M Comparisonof effect of Ba-modification on the thermostabilities of alumina andalumina-supported Pd catalysts prepared from different alumina sourcesJournal of Fudan University (Natural Science) 2003 42(3)423427 (in Chinese)
5. Lin H Y Zhang Z T Huang Ch Y Tang Z L Chen Q M Preparation of high purity and ultra-fine α-Al₂O₃ powders by pyrolysis of NH₄AlO(OH)HCO₃Journal of the Chinese CeramicSociety 1998 13(6)803807 (in Chinese)
6. Wang X Wang P L Cheng Y B Effect of TiO₂ and MgO additionson microstructures of Al₂O₃Journal of inorganic Materials 2001 16(5)979984 (in Chinese)
7. Bogush G H Zukoski C F Study on the formation of monodisperse silica powdersIn: Mackenzie J DUlrich DrUltrastructureProcessing of Advanced Ceramics.New YorkJohn Wiley 1988 477
8. Liu Yong Niu Guoxing et al.Effect of gelation onthermostability of alumina modified with bariumChinese Journal of Catalysis 1999 20(6)664666