›› 2020, Vol. 22 ›› Issue (4): 85-92.

• Catalyst Research • 上一篇    下一篇


孟媛1,王海彦1,SUN Na1,2,杨占旭3,3,王钰佳1,3   

  1. 1. 辽宁石油化工大学
    2. College of Chemical Engineering,China University of Petroleum, Changjiang Road 66, 266580 Qingdao, China,
  • 收稿日期:2020-02-26 修回日期:2020-03-22 出版日期:2020-12-30 发布日期:2020-12-30
  • 通讯作者: 王钰佳 E-mail:fsyzww@126.com
  • 作者简介:2020-05-13
  • 基金资助:

Synthesis of Hierarchical SAPO-11 Molecular Sieve by Directing Agent Method for n-Alkane Hydroisomerization

Yuan Meng1,Wang Haiyan2,Na SUN3,4,xu zhanyang2,2,Wang Yujia2,5   

  1. 1. Liaoning Shihua University
    3. Liaoning Shihua University,
    4. aCollege of Chemical Engineering,China University of Petroleum, Changjiang Road 66, 266580 Qingdao, China,
    5. 辽宁石油化工大学
  • Received:2020-02-26 Revised:2020-03-22 Online:2020-12-30 Published:2020-12-30
  • Contact: Wang Yujia E-mail:fsyzww@126.com
  • Supported by:

摘要: Silicoaluminophosphates SAPO-11 molecular sieves with small particle size and hierarchical pores were synthesized using a directing agent method. The effect of crystallization time on the crystal structure, morphology, pore structure properties and acid properties of SAPO-11 molecular sieves were investigated. The results of XRD, SEM, BET and NH3-TPD showed that the SAPO-11 molecular sieves with fine and uniform morphology could be synthesized in a shorter crystallization time used the directing agent method, which just unlike the SAPO-11 molecular sieves synthesized with the conventional method. With the crystallization time increased, the particle size of SAPO-11 molecular sieve was significantly reduced, and the mesoporous structure (intercrystalline pore) was generated between the particles. Furthermore, the external specific surface area and the total specific surface area reached 81.7 m2g-1 and 192.0 m2g-1, respectively, which effectively reduce the pore mass transfer resistance, significantly increase the number of acid active sites. The results of n-dodecane hydroisomerization revealed that the Pt/SAPO-11 prepared with the novel method exhibited higher catalytic activity and better hydroisomerization selectivity than the Pt/SAPO-11 synthesized by conventional hydrothermal method. Thus, the small particle molecular sieve has promising industrial applications as catalyst support.

关键词: directing agent method, small particle, SAPO-11, mesoporous structure, hydroisomerization