The absorption kinetics of no from flue gas in a stirred tank reactor with KMnO4/NaOH solutions

H. Chu, S. Y. Li, T. W. Chien

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Absorptions of NO by neutral and alkaline solutions of KMnO4 were performed in this study to clarify the reaction kinetics. The experiments were mainly carried out under 50 °C, which is the common operating temperature for wet scrubbers. According to the assumption that the absorption of NO was developed under the fast pseudo-mth reaction regime, which is verified in the experiments, the absorption rate of NO into KMnO4 solutions is found to be negative half-order dependent on PNO and first-order dependent on [KMnO4]. The addition of NaOH into the solutions of KMnO4 would increase the absorption rate of NO. The absorption rate of NO at 25 °C is lower than that of 50 °C. In the ranges of this study, the absorption rate of NO would not change by changing the gas flow rate and O2 concentration. NO2- is the dominate ion in the liquid phase for this study. However, the [NO3-]/[NO2-] ratio increases with the increasing NaOH concentration.

Original languageEnglish
Pages (from-to)801-827
Number of pages27
JournalJournal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Issue number5
Publication statusPublished - 1998 Jan 1

All Science Journal Classification (ASJC) codes

  • Environmental Engineering


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