Citation: Shujin Zhu, Suyao Liu, Huaike Zhang, Enjing Lü, Jie Ren. Investigation of synthesis and hydroisomerization performance of SAPO-11/Beta composite molecular sieve[J]. Chinese Journal of Catalysis, ;2014, 35(10): 1676-1686. doi: 10.1016/S1872-2067(14)60133-9 shu

Investigation of synthesis and hydroisomerization performance of SAPO-11/Beta composite molecular sieve

Shujin Zhu ^a,b ,
Suyao Liu ^a,b ,
Huaike Zhang ^a,c ,
Enjing Lü ^c ,
Jie Ren ^a,c,,

1.
a State key Laboratory of Coal Conversion, Shanxi Institute of Coal Chemistry, Chinese Academy of Science, Taiyuan 030001, Shanxi, China;

Corresponding author: Jie Ren,
Received Date: 7 March 2014
Available Online: 10 April 2014

The SAPO-11/Beta composite molecular sieve was synthesized by the hydrothermal method with zeolite Beta as the silicon source. The physicochemical properties of SAPO-11, Beta molecular sieve, the composite molecular sieve, and the mechanical mixture of SAPO-11 and Beta molecular sieve were characterized by X-ray diffraction, N₂ adsorption-desorption, scanning electron microscopy, transmission electron microscopy-energy dispersive spectroscopy, magic-angle spinning nuclear magnetic resonance, and pyridine adsorption infrared spectroscopy. In addition, the catalytic performance of platinum-loaded zeolite samples in the hydroisomerization of n-dodecane was investigated. The results indicate that the properties and catalytic performance of the composite molecular sieve were quite different from those of the pure zeolites and the mechanical mixture. Compared with the mechanical mixture, the combination of SAPO-11 and Beta by chemical bonds was more tightly bound in the composite molecular sieve with a core-shell structure. The acidity and pore structure of the composite were favorable for catalytic performance in the hydroisomerization of n-dodecane. The composite catalyst was superior to the other catalysts, especially in the yield of multibranched isomers.
- Beta molecular sieve,
- Composite molecular sieve,
- Core-shell structure,
- Synergistic effect,
- Hydroisomerization,
- Multibranched isomers,
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