Kinetic study on high-temperature gasification of medical plastic waste coupled with hydrogen-rich syngas production catalyzed by steel-converter ash

作者：Qin, Linbo; Xu, Zhe; Zhao, Bo; Zou, Chun; Chen, Wangsheng; Han, Jun^*

来源：JOURNAL OF THE ENERGY INSTITUTE, 2022, 102: 14-21.

DOI：10.1016/j.joei.2022.02.005

• Medical plastic waste
• Converter ash
• Catalytic gasification
• Hydrogen-rich gas
• Kinetics

In order to dispose medical plastic waste (MPW) with aim of producing hydrogen-rich syngas, converter ash (CA) produced from the converter steelmaking process was used as the catalyst to promote MPW gasification coupled with the hydrogen-rich syngas production in a fixed-bed reactor at 900-1100 degrees C, and the kinetics on the MPW gasification were also analyzed based on Friedman and model-fitting method. The results indicated that the hydrogen-rich syngas was generated during the MPW high-temperature gasification due to the synergistic catalytic of the Fe2O3 and CaO in the CA. The CA had a significant catalytic effect on the reaction rates for the H-2, CO and CH4 formation, whereas the steam had no significantly effect on the reaction mechanism for the H-2, CO and CH4 formation during the MPW CO2 gasification. The kinetic models for the H-2, CO and CH4 formation during the MPW non-catalytic CO2 gasification were in sequence as three-dimensional diffusion, chemical reaction (n = 1), and nucleation and growth (n = 1/2). However, the nucleation and growth (n = 2/3), chemical reaction (n = 0) and chemical reaction (n = 1) were the optimum models for the H-2, CO and CH4 formation during MPW CO2 gasification in the presence of CA.

• 单位
  华中科技大学