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

Research output: Contribution to journalArticle

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 languageEnglish (US)
Pages (from-to)2222-2227
Number of pages6
JournalZhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science)
Volume42
Issue number12
DOIs
StatePublished - Dec 1 2008
Externally publishedYes

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Keywords

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

ASJC Scopus subject areas

  • Engineering(all)

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