SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2015, Vol. 23 ›› Issue (4): 652-658.DOI: 10.1016/j.cjche.2014.12.004

• 催化、动力学与反应工程 • 上一篇    下一篇

Numerical study of pore structure effect on SO2-CaO reactions

Liang Ma1, Liyong Cao2, Rong He1   

  1. 1 Department of Thermal Engineering, Tsinghua University, Beijing 100084, China;
    2 Dongfang Electric Corporation, Chengdu 611731, China
  • 收稿日期:2013-09-18 修回日期:2014-02-11 出版日期:2015-04-28 发布日期:2015-05-13
  • 通讯作者: Rong He
  • 基金资助:

    Supported by the National Natural Science Foundation of China (51176096).

Numerical study of pore structure effect on SO2-CaO reactions

Liang Ma1, Liyong Cao2, Rong He1   

  1. 1 Department of Thermal Engineering, Tsinghua University, Beijing 100084, China;
    2 Dongfang Electric Corporation, Chengdu 611731, China
  • Received:2013-09-18 Revised:2014-02-11 Online:2015-04-28 Published:2015-05-13
  • Contact: Rong He
  • Supported by:

    Supported by the National Natural Science Foundation of China (51176096).

摘要: The effect of varying pore structures on the kinetics of SO2-CaO reactions is not fully understood in the previous studies. Combining fractal pore model, gas molecular movement model and two-stage reaction model, a new desulfurization model is established in this paper. Fractal pore model is used to simulate CaO particle and gas molecular movement model is used to simulate gas diffusion in pores. Fractal dimension is used to characterize complexity of pore structure instead of tortuosity factor. It is found that the reaction is significantly affected by pore structures. A modulus ø is introduced to characterize the relationship between varying pore structures and apparent reaction parameters. And this relationship is verified by thermo-gravimetric analysis (TGA) data. Comparing to the previous models, the effect of varying pore structure on the kinetics of the reaction is described more accurately by the desulfurization model.

关键词: Desulfurization model, Gas diffusion, Fractal, Pore structure

Abstract: The effect of varying pore structures on the kinetics of SO2-CaO reactions is not fully understood in the previous studies. Combining fractal pore model, gas molecular movement model and two-stage reaction model, a new desulfurization model is established in this paper. Fractal pore model is used to simulate CaO particle and gas molecular movement model is used to simulate gas diffusion in pores. Fractal dimension is used to characterize complexity of pore structure instead of tortuosity factor. It is found that the reaction is significantly affected by pore structures. A modulus ø is introduced to characterize the relationship between varying pore structures and apparent reaction parameters. And this relationship is verified by thermo-gravimetric analysis (TGA) data. Comparing to the previous models, the effect of varying pore structure on the kinetics of the reaction is described more accurately by the desulfurization model.

Key words: Desulfurization model, Gas diffusion, Fractal, Pore structure