Citation: JIAO Yi, QIN Li-Xiao, LI Xiong-Jian, WANG Jia, WANG Jian-Li, ZHU Quan, LI Xiang-Yuan, CHEN Yao-Qiang. Influence of Adding Zr_0.5Ti_0.5O₂ on the Performance of Supercritical Cracking Catalyst for RP-3[J]. Acta Physico-Chimica Sinica, ;2013, 29(10): 2255-2262. doi: 10.3866/PKU.WHXB201308271 shu

Influence of Adding Zr_0.5Ti_0.5O₂ on the Performance of Supercritical Cracking Catalyst for RP-3

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 Date: 18 June 2013
Available Online: 27 August 2013
Fund Project: 国家自然科学基金(91016002) (91016002)四川大学优秀青年学者科研基金(2013SCU04A05) (2013SCU04A05)国家高技术研究发展计划项目(863)(2006AA01A119) (863)(2006AA01A119)高超声速冲压发动机技术重点实验室开放基金(20120103013)资助 (20120103013)

Zr_0.5Ti_0.5O₂ 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 Zr_0.5Ti_0.5O₂ 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 Zr_0.5Ti_0.5O₂-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.
- Endothermic fuel,
- ZrO₂-TiO₂ composite oxide,
- Supercritical,
- Catalytic cracking,
- Heat sink
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Influence of Adding Zr0.5Ti0.5O2 on the Performance of Supercritical Cracking Catalyst for RP-3

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Influence of Adding Zr_0.5Ti_0.5O₂ on the Performance of Supercritical Cracking Catalyst for RP-3