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Experimental Investigation of the Effects of Inorganic Components on the Supercritical Water Gasification of Semi-Coke

Author

Listed:
  • Panpan Sun

    (College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China)

  • Zhaobin Lv

    (College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China)

  • Chuanjiang Sun

    (College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China)

  • Hui Jin

    (State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Long He

    (College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China)

  • Tong Ren

    (College of Mechanical & Electrical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China)

  • Zening Cheng

    (State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
    Zhundong Energy Research Institute, Xinjiang Tianchi Energy Co., Ltd., Changji 831100, China)

Abstract

Inorganic components in coal play a significant role during the supercritical water gasification (SCWG) process. This study comprehensively investigated the effect of major mineral components (SiO 2 , Al 2 O 3 , and CaO) on the SCWG of semi-coke with/without K 2 CO 3 . The inhibition/promotion mechanism and conversion of mineral chemical components were explored. The results showed that, without K 2 CO 3 , CaO promoted gasification because CaO’s adsorption of CO 2 contributed to the fixed carbon steam reforming reaction and the catalysis of highly dispersed calcite. When K 2 CO 3 was added, SiO 2 and CaO were prone to sintering and agglomeration due to the formation of low-melting-point minerals, which hindered further gasification of fine carbon particles. Al 2 O 3 prevented the aggregation of slags, increased the probability of fine carbon particles contacting SCW and K 2 CO 3 , and promoted complete gasification. This study’s results may provide theoretical guidance for the directional control of minerals in coal during SCWG, and complete gasification of solid-phase carbon can be achieved by properly adjusting the mineral components.

Suggested Citation

  • Panpan Sun & Zhaobin Lv & Chuanjiang Sun & Hui Jin & Long He & Tong Ren & Zening Cheng, 2024. "Experimental Investigation of the Effects of Inorganic Components on the Supercritical Water Gasification of Semi-Coke," Energies, MDPI, vol. 17(5), pages 1-14, March.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:5:p:1193-:d:1350034
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