Reduction of FeII(EDTA)-NO by Mn powder in wet flue gas denitrification technology: stoichiometry, kinetics, and thermodynamics

  • Jun Chen
  • Jinjia He
  • Xiaoping Wang
  • Dzmitry Hrynsphan
  • Jiali Wu
  • Jianmeng Chen
  • Jiachao YaoEmail author
Research Article


Conversion of FeII(EDTA)-NO or FeIII(EDTA) into FeII(EDTA) is a key process in a wet flue gas denitrification technology with FeII(EDTA) solution. In this work, the stoichiometry, kinetics, and thermodynamics of FeII(EDTA)-NO reduction by Mn powder were investigated. We first studied the FeII(EDTA)-NO reduction and product distribution to speculate a possible stoichiometry of FeII(EDTA)-NO reduction by Mn powder. Then, the effects of major influencing factors, such as pH value, temperature, and Mn concentration, were studied. The pseudo-second-order model was established to describe the FeII(EDTA)-NO reduction. Simultaneously, according to Arrhenius and Eyring-Polanyi equations, the reaction activation energy (Ea), enthalpy of activation (∆H), and entropy of activation (∆S) were calculated as 23.68 kJ/mol, 21.148 kJ/mol, and − 149.728 J/(k mol), respectively. Additionally, simultaneous reduction of FeIII(EDTA) and FeII(EDTA)-NO was investigated to better study the mechanism of FeII(EDTA) regeneration, suggesting that there was a competition between the two reduction processes. Finally, a simple schematic mechanism of NO absorption by FeII(EDTA) combined with regeneration of manganese ion and ammonium was proposed. These fundamental researches could offer a valuable guidance for wet flue gas denitrification technology with FeII(EDTA) solution.


FeII(EDTA)-NO reduction Mn powder Influencing factor Kinetics Mn2+ recovery 


Funding information

The Financial support was provided by the Natural Science Foundation of Zhejiang Province (LY17E080018), the Natural Science Foundation of China (21777142), and the National Key Research and Development Program of China (2016YGC0203701-08).

Supplementary material

11356_2019_6901_MOESM1_ESM.docx (102 kb)
ESM 1 (DOCX 102 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Jun Chen
    • 1
  • Jinjia He
    • 2
  • Xiaoping Wang
    • 2
  • Dzmitry Hrynsphan
    • 3
  • Jiali Wu
    • 2
  • Jianmeng Chen
    • 2
  • Jiachao Yao
    • 1
    Email author
  1. 1.College of Biology and Environmental EngineeringZhejiang Shuren UniversityHangzhouChina
  2. 2.College of EnvironmentZhejiang University of TechnologyHangzhouChina
  3. 3.Research Institute of Physical and Chemical ProblemsBelarusian State UniversityMinskBelarus

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