Chinese Journal of Catalysis

Chinese Journal of Catalysis ›› 2009, Vol. 30 ›› Issue (4): 340-346.

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Synthesis and Characterization of Magnesium-Substituted Aluminophosphate Molecular Sieves (MgAPO-11) and Their Kinetic Study of Catalytic Cracking of n-Hexane

FENG Lili1, 2, QI Xingyi2,*, LI Zheng2, ZHU Yuelin2, LI Xingguo1   

  1. 1College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China; 2School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
  • Received:2009-04-25 Online:2009-04-25 Published:2013-01-21

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Abstract: MgAPO-11 molecular sieves with various magnesium contents were synthesized by the static hydrothermal method using different molar fractions of MgO (x) in the reactive gel. The characterization results indicated that the isomorphous substitution of Mg(II) for Al(III) occurred. The reaction was first order in n-hexane. It was suggested that the monomolecular mechanism prevailed for this cracking reaction.

Key words: magnesium, aluminophosphate molecular sieve, AEL topology, n-hexane, catalytic cracking, kinetic