Nitric oxide removal from flue gas coupled with the Fe<sup>II</sup>EDTA regeneration by ultraviolet irradiation

Yuan Xu; Ziwei Liu; Ying Dai; Jinbo Ouyang; Zhuyao Li; Yuling Zhu; Jianhua Ding; Feiqiang He

doi:10.1016/j.cjche.2023.11.025

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Nitric oxide removal from flue gas coupled with the Fe^IIEDTA regeneration by ultraviolet irradiation

Updated：2026-01-06

- Nitric oxide removal from flue gas coupled with the Fe^IIEDTA regeneration by ultraviolet irradiation
- Chinese Journal of Chemical Engineering Vol. 68, Issue 4, Pages: 133-143(2024)
- Affiliations：
  
  School of Chemistry and Materials Science, East China University of Technology,Nanchang,China,330013
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2023.11.025
  CLC：
- Published：2024
- Accepted：
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EDTA regeneration by ultraviolet irradiation[J]. 中国化学工程学报, 2024, 68(4): 133-143.
DOI：

EDTA regeneration by ultraviolet irradiation[J]. 中国化学工程学报, 2024, 68(4): 133-143. DOI： 10.1016/j.cjche.2023.11.025.

摘要

Abstract

During wet complexation denitrification of flue gas

EDTA regeneration

also known as reducing Fe

III

EDTA and Fe

EDTA-nitric oxide (NO) to Fe

EDTA

is crucial. In this paper

ultraviolet (UV) light was used for the first time to reduce Fe

EDTA-NO. The experimental result demonstrated that Fe

EDTA-NO reduction rate increased with UV power increasing

elevated temperature

and initial Fe

EDTA-NO concentration decreasing. Fe

EDTA-NO reduction rate increased first and then decreased as pH value increased (2.0-10.0). Fe

EDTA-NO reduction with UV irradiation presented a first order reaction with respect to Fe

EDTA-NO. Compared with other Fe

EDTA regeneration methods

EDTA regeneration with UV show more superiority through comprehensive consideration of regeneration rate and procedure. Subsequently

NO absorption experiment by Fe

EDTA solution with UV irradiation confirmed that UV can significantly promote the NO removal performance of Fe

EDTA. Appropriate oxygen concentration (3% (vol)) and acidic environment (pH = 4) was favorable for NO removal. With UV power increasing as well as temperature decreasing

NO removal efficiency rose. In addition

the mechanism research indicates that NO from flue gas is mostly converted to NO

and N

O with Fe

EDTA absorption liquid with UV irradiation. UV strengthens NO removal in Fe

EDTA absorption liquid by forming a synergistic effect of oxidation-reduction-complexation. Finally

compared with NO removal methods with Fe

EDTA

EDTA combined UV system shows prominent technology advantage in terms of economy and secondary pollution.

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Related Institution

Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology

State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology

State Key Laboratory for Nuclear Resources and Environment, School of Chemistry, Biology and Materials Science, East China University of Technology

School of Chemical Engineering, Changchun University of Technology

School of Chemical Engineering, Northwest University

⁰

Nitric oxide removal from flue gas coupled with the FeIIEDTA regeneration by ultraviolet irradiation

DOI：10.1016/j.cjche.2023.11.025

摘要

Abstract

关键词

Keywords

references

Nitric oxide removal from flue gas coupled with the Fe^IIEDTA regeneration by ultraviolet irradiation