Effect of flue gas composition on NOx removal by chemical Absorption-microbial reduction

Jin Lin Jiang; Zi Ting Li; Shi Han Zhang; Cheng Zhi Wu; Wei Li

doi:10.3785/j.issn.1008-973X.2008.12.035

Effect of flue gas composition on NO_x removal by chemical Absorption-microbial reduction

Jin Lin Jiang, Zi Ting Li, Shi Han Zhang, Cheng Zhi Wu, Wei Li

Research output: Contribution to journal › Article › peer-review

Abstract

The influences of O₂ and CO₂ in simulative flue gas on NO removal efficiency by chemical absorption-microbial reduction integrated approach were investigated. The results indicated that the dissolved oxygen in absorption solution was up to 0.85 mg/L as O₂ volume ratio from 0 to 5%, which resulting in decrease of the concentration of active Fe(II)EDTA (EDTA: ethylenediaminetetraacetate) at 50°C. But the NO removal efficiency just decreased from 95% to 90% because Fe(II)EDTA could be regenerated effectively in virtue of microbial reduction. CO₂ in flue gas could buffer the pH value of absorption solution between 6.5 and 7.0, which was beneficial to the continuous running efficiency of the NO removal system. The examination of the treatment load of the NO removal equipment confirmed that the biological reduction loading rate would fall when O₂ volume ratio of input gas increased.

Original language	English (US)
Pages (from-to)	2222-2227
Number of pages	6
Journal	Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science)
Volume	42
Issue number	12
DOIs	https://doi.org/10.3785/j.issn.1008-973X.2008.12.035
State	Published - Dec 2008
Externally published	Yes

Keywords

Chemical absorption
Fe(II)EDTA
Flue gas denitrification
Microbial reduction
O

ASJC Scopus subject areas

General Engineering

Online availability

10.3785/j.issn.1008-973X.2008.12.035

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Cite this

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title = "Effect of flue gas composition on NOx removal by chemical Absorption-microbial reduction",

abstract = "The influences of O2 and CO2 in simulative flue gas on NO removal efficiency by chemical absorption-microbial reduction integrated approach were investigated. The results indicated that the dissolved oxygen in absorption solution was up to 0.85 mg/L as O2 volume ratio from 0 to 5%, which resulting in decrease of the concentration of active Fe(II)EDTA (EDTA: ethylenediaminetetraacetate) at 50°C. But the NO removal efficiency just decreased from 95% to 90% because Fe(II)EDTA could be regenerated effectively in virtue of microbial reduction. CO2 in flue gas could buffer the pH value of absorption solution between 6.5 and 7.0, which was beneficial to the continuous running efficiency of the NO removal system. The examination of the treatment load of the NO removal equipment confirmed that the biological reduction loading rate would fall when O2 volume ratio of input gas increased.",

keywords = "Chemical absorption, Fe(II)EDTA, Flue gas denitrification, Microbial reduction, O",

author = "Jiang, {Jin Lin} and Li, {Zi Ting} and Zhang, {Shi Han} and Wu, {Cheng Zhi} and Wei Li",

year = "2008",

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AU - Jiang, Jin Lin

AU - Li, Zi Ting

AU - Zhang, Shi Han

AU - Wu, Cheng Zhi

AU - Li, Wei

PY - 2008/12

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N2 - The influences of O2 and CO2 in simulative flue gas on NO removal efficiency by chemical absorption-microbial reduction integrated approach were investigated. The results indicated that the dissolved oxygen in absorption solution was up to 0.85 mg/L as O2 volume ratio from 0 to 5%, which resulting in decrease of the concentration of active Fe(II)EDTA (EDTA: ethylenediaminetetraacetate) at 50°C. But the NO removal efficiency just decreased from 95% to 90% because Fe(II)EDTA could be regenerated effectively in virtue of microbial reduction. CO2 in flue gas could buffer the pH value of absorption solution between 6.5 and 7.0, which was beneficial to the continuous running efficiency of the NO removal system. The examination of the treatment load of the NO removal equipment confirmed that the biological reduction loading rate would fall when O2 volume ratio of input gas increased.

AB - The influences of O2 and CO2 in simulative flue gas on NO removal efficiency by chemical absorption-microbial reduction integrated approach were investigated. The results indicated that the dissolved oxygen in absorption solution was up to 0.85 mg/L as O2 volume ratio from 0 to 5%, which resulting in decrease of the concentration of active Fe(II)EDTA (EDTA: ethylenediaminetetraacetate) at 50°C. But the NO removal efficiency just decreased from 95% to 90% because Fe(II)EDTA could be regenerated effectively in virtue of microbial reduction. CO2 in flue gas could buffer the pH value of absorption solution between 6.5 and 7.0, which was beneficial to the continuous running efficiency of the NO removal system. The examination of the treatment load of the NO removal equipment confirmed that the biological reduction loading rate would fall when O2 volume ratio of input gas increased.

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KW - Flue gas denitrification

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