Wet flue gas desulfurization is widely used in power plants because of its high desulfurization efficiency. The reason why it is difficult to predict sulfur dioxide removal efficiency in flue gas is that it is related to many factors. In this paper, the SO 2 was removed by absorbing with ammonia solution in a packed tower. Experimental studies have shown that the operating conditions affecting the removal of sulfur dioxide include pH, liquid-to-gas, the concentration of SO 2 and inlet velocity. Based on the two-film theory, the mass transfer rate equation of SO 2 in the ammonia desulphurization process was studied, and the prediction of SO 2 removal efficiency based on certain assumptions was developed. In order to prove the responsibility of the model, significant factors such as pH, liquid-to-gas, the concentration of SO 2 , and inlet velocity were studied in a packed tower. The experimental results show that it is possible to improve desulphurization efficiency by increasing the liquid-to-gas ratio and pH value, lowering the concentration of SO 2 and inlet velocity. Experimental results show that the experimental value is consistent with the predicted value. Keywords Ammonia absorption • Packed power • Desulfurization • Mass transfer rate equation List of symbols A The cross-sectional area of packed column, m 2 a Effective interfacial area, m 2 /m 3 a t Packed column specific surface area, m 2 /m 3 b Stoichiometric number of ammonium sulfite reactions c Ai Concentration of sulfur dioxide in liquid film, kmol/m 3 c BL Concentration of ammonium sulfite in the bulk of the liquid phase, kmol/m 3 D r Relative density c i Ion concentration, kmol/m 3 Dso 2 , D (NH4)2SO3 Diffusion coefficients of sulfur dioxide and ammonium sulfite in liquid film, m 2 /s E Enhancement factor G Volume flow of flue gas, m 3 /s

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This paper investigated the preparation and characterization of the Zn-antibacterial White Carbon Black modified by electrolyte, surfactant, and organic solvent. The sol-gel method was used to prepare the White Carbon Black carrier. Zn2+ was selected to be the antibacterial ion, and Sodium nitrite (electrolyte), Sodium dodecylbenzene sulfonate (Surfactant), Ethanol (organic solvent) was selected to be the modifiers. They were synthesized on the white carbon black carrier. These as-synthesized modified antibacterial materials were characterized by inductively coupled plasma, particle size measurement instrument and enumeration tests (Escherichia coli as experimental bacterium). The result showed that the amount of antibacterial ions and bacteriostasis rate of modified Zn-antibacterial white carbon black are higher than those for the common Zn-antibacterial white carbon black. In addition, the particle sizes of modified samples can be extended down with a narrow size distribution. Other advantage of modified Zn-antibacterial white carbon black is good thermal stability.