Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (10): 2427-2437.doi: 10.1016/j.cjche.2019.02.025

• Catalysis, kinetics and reaction engineering • Previous Articles     Next Articles

Characteristics of single petcoke particle during the gasification process at high temperatures

Ming Liu1,2, Zhongjie Shen1,2, Qinfeng Liang1,2, Jianliang Xu1,2, Haifeng Liu1,2   

  1. 1 Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China;
    2 Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, China
  • Received:2018-12-12 Revised:2019-02-25 Online:2019-10-28 Published:2020-01-17
  • Contact: Haifeng Liu
  • Supported by:
    Supported by the National Natural Science Foundation of China (U1402272) and the Shanghai Engineering Research Center of Coal Gasification (18DZ2283900).

Abstract: Particle concentration significantly affected the gasification of petcoke particles according to our previous studies. In this work, gasification characteristics and morphological evolution of single petcoke particle were investigated using a high temperature stage microscope experimental setup. The results showed that the reaction temperature significantly affected the reactivity of petcoke in the temperature range of 1200-1300℃. While the promoting effect on gasification reactivity decreased with further increasing the reaction temperature, the SEM analysis demonstrated the pore development during the gasification process, which attributed to the increase of reaction rate with conversion. The Raman analysis, HRTEM and SEM-EDX analysis showed that the heterogeneous graphitization of petcoke and non-uniform distribution of catalytic elements in petcoke attributed to the development of surface pores with limited depth. The gasification mechanism of petcoke particle can be briefly described as the reaction rate mainly contributed from the fast-reaction area. Besides, the pore development in fast-reaction area also enlarged the surface area of petcoke particle.

Key words: Petcoke particle, Reaction kinetics, Pore growth, Reaction mechanism, High temperature gasification