Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (2): 527-535.doi: 10.3866/PKU.WHXB201512033

• ARTICLE • Previous Articles     Next Articles

Discrimination of the Mass Transfer Performance of In situ Crystallization FCC Catalysts by the Frequency Response Method

Yu-Cai QIN1,Xiong-Hou GAO2,*(),Li-Fei SHI1,Li ZHANG2,Lin-Hai DUAN1,Li-Juan SONG1,*()   

  1. 1 Key Laboratory of Petrochemical Catalytic Science and Technology of Liaoning Province, Liaoning Shihua University, Fushun 113001, Liaoning Province, P. R. China
    2 Lanzhou Petrochemical Research Center, Petrochemical Research Institute, Petro China Company Limited, Lanzhou 730060, P. R. China
  • Received:2015-08-27 Published:2016-01-30
  • Contact: Xiong-Hou GAO,Li-Juan SONG E-mail:gaoxionghou@petrochina.com.cn;lsong56@263.net
  • Supported by:
    the National Natural Science Foundation of China(21076100, 21376114);China National Petroleum Corporation(10-01A-01-01-01);Innovation Team of Liaoning Province Colleges, China

Abstract:

Mass transfer behaviors of benzene in an in situ crystallization fluid catalytic cracking (FCC) catalyst were measured and discriminated by the frequency response (FR) method and an intelligent gravimetric analyzer (IGA). The texture properties of the FCC catalysts were analyzed by N2 adsorption and scanning electron microscope (SEM). By comparison with the mass transfer performance of a semi-synthetic FCC catalyst, as well as a zeolite Y, the results show that the in situ crystallization FCC catalyst has excellent and improved mass transfer behavior over the semi-synthetic FCC catalyst and that it reduces the mass transfer resistance between the interface of zeolite crystal and substrate, which can be attributed to the excellent porous connectivity of the former with the unique accumulation state of the highly dispersed nanosized Y zeolite crystals. It has been demonstrated that the FR technique can be used to measure and distinguish the complex mass transport processes in hierarchical porous catalytic materials.

Key words: Frequency response method, In situ crystallization, Fluid catalytic cracking catalyst, Mass transfer process, Porous connectivity

MSC2000: 

  • O643