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Removal of NOx by microwave reactor with ammonium bicarbonate and Ga-A zeolites at low temperature

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  • Wei, Z.S.
  • Du, Z.Y.
  • Lin, Z.H.
  • He, H.M.
  • Qiu, R.L.

Abstract

Microwave reactor with the mixture of ammonium bicarbonate (NH4HCO3) and Ga-A zeolites was set up to study the removal of nitrogen oxides (NOx) from waste gas with excess oxygen concentration (14–19%) at low temperature (80–120°C). The results showed that the microwave reactor filled with NH4HCO3 and Ga-A zeolites could reduce NOx to nitrogen with the best purifying efficiency of 95.45% and the best denitrification amount of 89.28mgh−1. The optimal microwave power and residence time (RT) on denitrification was 259–280W and 0.259s, respectively. Microwave denitrification effect of the experiment using ammonium bicarbonate and Ga-A zeolites was much higher than that using ammonium bicarbonate or Ga-A zeolites only. The mechanism for microwave-induced NOx reduction can be explained as the microwave-induced catalytic reaction between NOx and ammonium bicarbonate with Ga-A zeolites being the catalyst and microwave absorbent.

Suggested Citation

  • Wei, Z.S. & Du, Z.Y. & Lin, Z.H. & He, H.M. & Qiu, R.L., 2007. "Removal of NOx by microwave reactor with ammonium bicarbonate and Ga-A zeolites at low temperature," Energy, Elsevier, vol. 32(8), pages 1455-1459.
    • Handle: RePEc:eee:energy:v:32:y:2007:i:8:p:1455-1459
    DOI: 10.1016/j.energy.2006.11.007
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    Cited by:

    1. Yao, Gui-huan & Wang, Fang & Wang, Xiao-bo & Gui, Ke-ting, 2010. "Magnetic field effects on selective catalytic reduction of NO by NH3 over Fe2O3 catalyst in a magnetically fluidized bed," Energy, Elsevier, vol. 35(5), pages 2295-2300.
    2. Bhattacharya, Madhuchhanda & Basak, Tanmay, 2013. "A theoretical study on the use of microwaves in reducing energy consumption for an endothermic reaction: Role of metal coated bounding surface," Energy, Elsevier, vol. 55(C), pages 278-294.
    3. Wei, Zhongbao & Li, Xiaolu & Xu, Lijun & Cheng, Yanting, 2013. "Comparative study of computational intelligence approaches for NOx reduction of coal-fired boiler," Energy, Elsevier, vol. 55(C), pages 683-692.
    4. Wei, Xiaocui & Xue, Xiangfei & Wu, Liu & Yu, Haozhe & Liang, Jie & Sun, Yifei, 2020. "High-grade bio-oil produced from coconut shell: A comparative study of microwave reactor and core-shell catalyst," Energy, Elsevier, vol. 212(C).
    5. Zhao, Yi & Han, Yinghui & Guo, Tianxiang & Ma, Tianzhong, 2014. "Simultaneous removal of SO2, NO and Hg0 from flue gas by ferrate (VI) solution," Energy, Elsevier, vol. 67(C), pages 652-658.
    6. Anis, Samsudin & Zainal, Z.A., 2011. "Tar reduction in biomass producer gas via mechanical, catalytic and thermal methods: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(5), pages 2355-2377, June.

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