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Citation: ZHANG Ming-hui, MA Qiang, XU Chao-qun, ZHU Yan-qun, ZHOU Jun-hu. Simultaneous removal of NOx and SO2 from glass furnace flue gas by ozone oxidation and spray tower[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(1): 88-93. shu

Simultaneous removal of NOx and SO2 from glass furnace flue gas by ozone oxidation and spray tower

  • 1.

    State Key Laboratory of Clean Energy Utilization (Zhejiang University), Institute for Thermal Power Engineering, Hangzhou 310027, China

  • Corresponding author: ZHU Yan-qun, 
  • Received Date: 11 July 2014
    Available Online: 29 September 2014

    Fund Project: 国家重点基础研究发展规划(973计划, 2012CB214906). (973计划, 2012CB214906)

  • The experiment on simultaneous removal of NOx and SO2 from glass furnace flue gas by ozone oxidation and spray tower was carried out. The experimental results show that the concentration of the sodium hydroxide as the spray solution has less effect on NOx removal efficiency when pH is above 10, but SO2 in the flue gas greatly enhances the NOx removal. The NOx removal efficiency reaches 70% and the SO2 removal efficiency remains above 99% as the concentration of sodium hydroxide (NaOH) is 0.5% and the O3/NO mol ratio is 1.6. When sodium sulfide (Na2S) is added into the spray solution, the NOx removal efficiency is improved and increases with the concentration of Na2S. During this process, SO2 has no obvious influence on the NOx removal; the NOx removal efficiency reaches 70% and the SO2 removal efficiency remains above 95% as the concentration of NaOH and Na2S is 0.5% and 0.6%, respectively, and the O3/NO mol ratio is 1.2. Long-running experiments (60 min) indicate that NO is transformed into NO2- in the solution and the NOx removal efficiency does not change with the pH value of the spray solution.
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