SCI和EI收录∣中国化工学会会刊

›› 2014, Vol. 22 ›› Issue (11/12): 1237-1242.DOI: 10.1016/j.cjche.2014.09.006

• 催化、动力学与反应工程 • 上一篇    下一篇

In Situ Delamination of Ferrierite Zeolite and its Performance in the Catalytic Cracking of C4 Hydrocarbons

Ruili Pan1, Miaojuan Jia2, Yuping Li3, Xiaofeng Li2, Tao Dou4   

  1. 1 Institute of Chemical and Biological Technology, Taiyuan University of Science and Technology, Taiyuan 030021, China;
    2 Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, China;
    3 College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
    4 CNPC Key Laboratory of Catalysis, College of Chemical Engineering, China University of Petroleum, Beijing 102249, China
  • 收稿日期:2013-08-26 修回日期:2013-08-26 出版日期:2014-12-28 发布日期:2014-12-24
  • 通讯作者: Tao Dou
  • 基金资助:
    Supported by the NSFC of China (20973123), the National Basic Research Program of China (2012CB215002), the International Science and Technology Cooperative Program of China (2010DFB40440) and Shanxi Basic Research Projects (2012011005-7, 2012011008-3).

In Situ Delamination of Ferrierite Zeolite and its Performance in the Catalytic Cracking of C4 Hydrocarbons

Ruili Pan1, Miaojuan Jia2, Yuping Li3, Xiaofeng Li2, Tao Dou4   

  1. 1 Institute of Chemical and Biological Technology, Taiyuan University of Science and Technology, Taiyuan 030021, China;
    2 Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, China;
    3 College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;
    4 CNPC Key Laboratory of Catalysis, College of Chemical Engineering, China University of Petroleum, Beijing 102249, China
  • Received:2013-08-26 Revised:2013-08-26 Online:2014-12-28 Published:2014-12-24
  • Supported by:
    Supported by the NSFC of China (20973123), the National Basic Research Program of China (2012CB215002), the International Science and Technology Cooperative Program of China (2010DFB40440) and Shanxi Basic Research Projects (2012011005-7, 2012011008-3).

摘要: Ferrierite (FER) zeolites were synthesized by solid transformation at different alkalinities (OH-/Al2O3 molar ratios). The in situ delamination of FER zeolites were achieved and their catalytic performances in the catalytic cracking of C4 hydrocarbons were examined. The relationships among the OH-/Al2O3 molar ratio, FER structure, composition, surface acidity and catalytic performance in C4 hydrocarbon crackingwere investigated. The results of X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electronmicroscopy, inductively coupled plasma atomic emission spectroscopy, N2 adsorption, NH3 temperature-programmed desorption and catalytic cracking showed that with increasing OH-/Al2O3 molar ratio in the synthesis gel, the SiO2/Al2O3 molar ratio of the as-synthesized FER zeolite decreased, the amount of acid sites in the corresponding H-FER increased, and the acid strengthweakened. Additionally, the FER zeolitewas delaminated at themesoscale. H-FER5 synthesized at the highest alkalinity had the largest number of acid sites and exhibited the highest catalytic activity in C4 hydrocarbon catalytic cracking among three of the prepared catalysts. H-FER3 synthesized at the secondhighest alkalinity showed that the highest yield of benzene and toluene because of the secondary pores resulted from the gaps between the layers, which were beneficial to the diffusion and formation of large molecules.

关键词: Ferrierite, Zeolite, Catalyst, Delamination, C4 hydrocarbon

Abstract: Ferrierite (FER) zeolites were synthesized by solid transformation at different alkalinities (OH-/Al2O3 molar ratios). The in situ delamination of FER zeolites were achieved and their catalytic performances in the catalytic cracking of C4 hydrocarbons were examined. The relationships among the OH-/Al2O3 molar ratio, FER structure, composition, surface acidity and catalytic performance in C4 hydrocarbon crackingwere investigated. The results of X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electronmicroscopy, inductively coupled plasma atomic emission spectroscopy, N2 adsorption, NH3 temperature-programmed desorption and catalytic cracking showed that with increasing OH-/Al2O3 molar ratio in the synthesis gel, the SiO2/Al2O3 molar ratio of the as-synthesized FER zeolite decreased, the amount of acid sites in the corresponding H-FER increased, and the acid strengthweakened. Additionally, the FER zeolitewas delaminated at themesoscale. H-FER5 synthesized at the highest alkalinity had the largest number of acid sites and exhibited the highest catalytic activity in C4 hydrocarbon catalytic cracking among three of the prepared catalysts. H-FER3 synthesized at the secondhighest alkalinity showed that the highest yield of benzene and toluene because of the secondary pores resulted from the gaps between the layers, which were beneficial to the diffusion and formation of large molecules.

Key words: Ferrierite, Zeolite, Catalyst, Delamination, C4 hydrocarbon