Acta Phys. -Chim. Sin. ›› 1989, Vol. 5 ›› Issue (01): 99-102.doi: 10.3866/PKU.WHXB19890121

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Adsorption Thermodynamics of Microporous Aluminophosphate AlPO4-11

Yan Ai-Zhen;Zhou Li-Rong;Xu Qin-Hua   

  1. Department of Chemistry, Nanjing University, Nanjing
  • Received:1987-07-15 Revised:1988-03-15 Published:1989-02-15
  • Contact: Yan Ai-Zhen

Abstract: The adsorption properties of molecules with different polarizabilities, benzene, cyclohexane, n-hexane and water, on aluminophosphate molecular sieve AlPO_4-11 have been investigated by gravimetric method, and compared with those on zeolites NaX and ZSM-5 having high Si/Al ratio.
From adsorption data we have calculated the isosteric heat of adsorption and the differential molar adsorption work and entropy of benzene and cyclohexane on AlPO_4-11. The adsorption isotherms can be described by the theory of volume filling of micropores. The results show that the heat of adsorption of hydrocarbons on AlPO_4-11 mainly depends on the surface energy of dispersion.
AIPO_4-11 favourably...