Reaction Kinetics, Mechanisms and Catalysis

, Volume 126, Issue 1, pp 295–306 | Cite as

Cracking of n-heptane with activation of vanadium oxide based catalyst: effect of support and modification by K or P

  • Xiaoyan HuEmail author
  • Xinlong Yan
  • Rui Feng
  • Jianliang Xue


In the present study, n-heptane cracking was comparatively investigated over ZSM-5 equilibrium catalyst with introduction of VOX/Al2O3, VOX/SiO2 and VOX/MgO, as well as the potassium or phosphorous incorporated VOX/Al2O3. The results showed that the conversion varied significantly with introduction of different VOX/support catalysts. The conversion decreased in the order of Base (without introduction) < + VOX/SiO2 < + VOX/MgO < + VOX/Al2O3. The different extent of improvement in conversion could be closely associated with the reducibility of them. The incorporation of potassium or phosphorous modified the acid properties of VOX/Al2O3. But the conversions were barely influenced. There was an increasing trend of selectivity to hydrogen and aromatic products with increasing acidity of the vanadia based catalysts. It was suggested that the improved basicity favored desorption of the active intermediate species from VOX unit, leading to a lower selectivity to hydrogen and aromatics produced.


Vanadium oxide Support Reducibility Acidity Cracking Selectivity 



This work is financially supported by National Natural Science Foundation of China (No. 21506247) and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

Supplementary material

11144_2018_1511_MOESM1_ESM.docx (102 kb)
Supplementary material 1 (DOCX 101 kb)


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2018

Authors and Affiliations

  • Xiaoyan Hu
    • 1
    Email author
  • Xinlong Yan
    • 1
  • Rui Feng
    • 1
  • Jianliang Xue
    • 2
  1. 1.Key Laboratory of Coal Processing and Efficient Utilization (Ministry of Education), School of Chemical EngineeringChina University of Mining & TechnologyXuzhouPeople’s Republic of China
  2. 2.College of Chemical and Environmental EngineeringShandong University of Science and TechnologyQingdaoChina

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