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Journal of Shanghai University（Natural Science Edition） ›› 2015, Vol. 21 ›› Issue (6): 701-708.doi: 10.3969/j.issn.1007-2861.2014.03.009

• Metallurgical Materials • Previous Articles     Next Articles

Process parameters of ammonium sulfite oxidation in ammonia desulfurization technology

 GU  Xiao-Jing, HE  Ren-Chu, WAN  Hao, FAN  Xiang-Dong   

  1. 1. School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China; 2. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
  • Received:2014-05-09 Online:2015-12-29 Published:2015-12-29

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Abstract: The influence of affecting factors on the oxidation rate of (NH4)2SO3 including concentration of (NH4)2SO3, concentration of (NH4)2SO4, temperature, pH value, air flow rate and concentration of CoSO4 were studied. The results showed that the oxidation rate of (NH4)2SO3is lowered with the increase of initial concentration of (NH4)2SO3. It is the same as concentration of (NH4)2SO4. From 40 ℃ to 60 ℃, (NH4)2SO3 oxidation rate increases with the increase of reaction temperature. The (NH4)2SO3 oxidation rate is also influenced by the pH value of the mixed solution, with the most preferred value being 5.5. When the air flow rate is within 100~400 L/h and with increase of air flow, (NH4)2SO3 oxidation rate increases. Taking into account the ammonia desulfurization project, the most appropriate process parameters are: reaction temperature at about 50 ℃, (NH4)2SO3 at low concentration, the pH value of mixed solution at 5.5, air flow rate at 300 L/h and CoSO4 at high concentration.

Key words: ammonia method, ammonium sulfite, oxidation rate

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