Meiqing Yu1,2, Hongjian Zhu1, Sheng Tian3, Rui Wang This email address is being protected from spambots. You need JavaScript enabled to view it.1,2, Ivan V. Kozhevnikov4 

1 School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
2 Shenzhen Research Institute of Shandong University, Shenzhen 518057, China
3 Shandong Research Institute for Chemical Technology, Qingdao University of Science & Technology, Jinan 250014, China
4 Department of Chemistry, The University of Liverpool, Liverpool, L69 7ZD, UK

Received: September 10, 2021
Revised: October 26, 2021
Accepted: October 29, 2021

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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Yu, M., Zhu, H., Tian, S., Wang, R., Kozhevnikov, I.V. (2021). Experimental Investigation of Simultaneous Removal of SO2 and NOx Using a Heteropoly Compound. Aerosol Air Qual. Res. 21, 210238.


  • Heteropoly compounds can simultaneously remove NO and SO2 from flue gas.
  • Doping of element W and solution pH affected the performance of the scrubber.
  • The desulfurization performance of NaPWMo was higher than that of HPWMo.
  • High concentration of NaPWMo solution and O2 can enhance desulfurization.


Aiming at developing a simple, feasible method for SO2 and NOx removal, in this work, various doping amounts of heteropolyacid and heteropolyacid salts were prepared and used in wet absorption for simultaneous removal of SO2 and NO. The desulfurization and denitrification performance was evaluated by investigating dynamic SO2 and NO absorption in a simulated reactor containing a heteropoly compound (HPC) solution along with various factors influencing the reaction. The results demonstrate that this system had a high removal efficiency of SO2 and modest NO removal. The amount of Wolfram (W) doping and the pH of the solution affecting the removal performance was studied, and a stable SO2 removal efficiency higher than 95% was obtained for HPW1Mo at a pH value of 5.5. In addition, the desulfurization performance of NaPWMo with a 50% removal efficiency was higher than that of the HPWMo solution (20%) after a 60 min reaction time. A high concentration of the NaPWMo solution and the presence of O2 were beneficial to desulfurization at room temperature. In addition, the removal efficiency of SO2 or NO by NaPWMo was only affected by its own gas concentration rather than their mutual influences on each other. This work should be beneficial to the optimization leading to the development of simultaneous desulfurization and denitrification systems in practical applications.

Keywords: Polyoxometalate, SO2, NO, Absorption, Removal efficiency

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