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Citation: Shi Xi-E, Zhai Shang-Ru, Dai Li-Yi, Shan Yong-Kui, He Ming-Yuan, Wei Wei, Wu Dong, Sun Yu-Han. Synthesis of Mesoporous Aluminosilicate Nanoparticles and Its Performance in Catalytic Cracking[J]. Acta Physico-Chimica Sinica, ;2004, 20(03): 265-270. doi: 10.3866/PKU.WHXB20040310 shu

Synthesis of Mesoporous Aluminosilicate Nanoparticles and Its Performance in Catalytic Cracking

1.
Department of Chemistry, East China Normal University, Shanghai　200062;State Key Laboratory of Coal Conversion, Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan　030001

Received Date: 1 August 2003
Available Online: 15 March 2004

Mesoporous aluminosilicate (denoted as Z-1) nanoparticles were synthesized from assembly of mixture of tetraethylorthosilicate (TEOS) and aluminum nitrate nonahydrate (ANN) with cetyltrimethylammonium bromide (CTAB) as template at low temperture. Important information about textural properties of the material were obtained by powder X-ray diffraction (XRD), N2 adsorption-desorption isotherms at 77 K and transmission electron microscopy (TEM),and the acid properties were determined by temperature-programmed desorption of ammonia (NH3-TPD).The results obtained by these methods indicated that the material possessed hexa nal mesostructure, narrow pore-size distribution and nanoparticles. The NH3-TPD showed that the acdity strength of Z-1 was similar to AlMCM-41, but the amount of medium-acid of Z-1 was more than that of AlMCM-41 prepared by post-synthesis method. In catalytic cracking of cumene and 1,3,5-triisopropylbenzene,Z-1 exhibited higher cataclytic acitivity, selectivity and steam stability (100％ water vapor,800 ℃,2 h) compared with AlMCM-41.
- Mesoporous molecular sieves;Acidity;AlMCM-41;Catalytic cracking;　Cumene;1,3,5-triisopropylbenzene
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