Acta Phys. -Chim. Sin. ›› 2013, Vol. 29 ›› Issue (10): 2255-2262.doi: 10.3866/PKU.WHXB201308271

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Influence of Adding Zr0.5Ti0.5O2 on the Performance of Supercritical Cracking Catalyst for RP-3

JIAO Yi1, QIN Li-Xiao2, LI Xiong-Jian2, WANG Jia2, WANG Jian-Li1, ZHU Quan2, LI Xiang-Yuan2, CHEN Yao-Qiang1   

  1. 1 Key Laboratory of Green Chemistry and Technology of the Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China;
    2 College of Chemical Engineering, Sichuan University, Chengdu 610064, P. R. China
  • Received:2013-06-18 Revised:2013-08-26 Published:2013-09-26
  • Contact: WANG Jian-Li E-mail:wangjianli@scu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (91016002), Outstanding Young Scholar Fund of Sichuan University, China (2013SCU04A05), National High-Tech Research and Development Program of China (863) (2006AA01A119), and Open Foundation of Key Laboratory on Hypersonic Scramjet Technology, China (20120103013).

Abstract:

Zr0.5Ti0.5O2 was prepared by co-precipitation and tested for its catalytic performance under supercritical conditions when mixed with a CeO2-Al2O3 (CA) base catalyst. The catalysts were characterized with an automatic adsorption instrument (BET method), X-ray diffraction (XRD), transmission electron microscopy (TEM), and temperature programmed desorption (TPD). It was found that Zr0.5Ti0.5O2 significantly lowered the temperature of the cracking reaction, and increased the thermal cracking gas rate by a factor of 2.8 times as large as that at 600 ℃ for the CAbase catalyst. The gas rate was increased by a factor of 4.0 times when it was doped into the CAbase catalyst, and the heat sink increased by 0.55 MJ·kg-1 over that of thermal cracking at 650 ℃. BET results show that the Zr0.5Ti0.5O2-doped CAbase catalyst has a double-pore structure that enhances ethylene selectivity. NH3-TPD result indicates that the acidity of the catalyst increased by 4.0 times, indicating improved surface acidity conducive to alkene generation.

Key words: Endothermic fuel, ZrO2-TiO2 composite oxide, Supercritical, Catalytic cracking, Heat sink

MSC2000: 

  • O643.36