Optimization of NO oxidation by H2O2 thermal decomposition at moderate temperatures.
H2O2 was adopted to oxidize NO in simulated flue gas at 100-500°C. The effects of the H2O2 evaporation conditions, gas temperature, initial NO concentration, H2O2 concentration, and H2O2:NO molar ratio on the oxidation efficiency of NO were investigated. The reason for the narrow NO oxidation temper...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Public Library of Science (PLoS)
2018-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC5905985?pdf=render |
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| author | Hai-Qian Zhao Zhong-Hua Wang Xing-Cun Gao Cheng-Hao Liu Han-Bing Qi |
| author_facet | Hai-Qian Zhao Zhong-Hua Wang Xing-Cun Gao Cheng-Hao Liu Han-Bing Qi |
| author_sort | Hai-Qian Zhao |
| collection | DOAJ |
| description | H2O2 was adopted to oxidize NO in simulated flue gas at 100-500°C. The effects of the H2O2 evaporation conditions, gas temperature, initial NO concentration, H2O2 concentration, and H2O2:NO molar ratio on the oxidation efficiency of NO were investigated. The reason for the narrow NO oxidation temperature range near 500°C was determined. The NO oxidation products were analyzed. The removal of NOx using NaOH solution at a moderate oxidation ratio was studied. It was proven that rapid evaporation of the H2O2 solution was critical to increase the NO oxidation efficiency and broaden the oxidation temperature range. the NO oxidation efficiency was above 50% at 300-500°C by contacting the outlet of the syringe needle and the stainless-steel gas pipe together to spread H2O2 solution into a thin film on the surface of the stainless-steel gas pipe, which greatly accelerated the evaporation of H2O2. The NO oxidation efficiency and the NO oxidation rate increased with increasing initial NO concentration. This method was more effective for the oxidation of NO at high concentrations. H2O2 solution with a concentration higher than 15% was more efficient in oxidizing NO. High temperatures decreased the influence of the H2O2 concentration on the NO oxidation efficiency. The oxidation efficiency of NO increased with an increase in the H2O2:NO molar ratio, but the ratio of H2O2 to oxidized NO decreased. Over 80% of the NO oxidation product was NO2, which indicated that the oxidation ratio of NO did not need to be very high. An 86.7% NO removal efficiency was obtained at an oxidation ratio of only 53.8% when combined with alkali absorption. |
| first_indexed | 2024-12-10T15:33:56Z |
| format | Article |
| id | doaj.art-cbc682d84b214f9db435530a0805112f |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-10T15:33:56Z |
| publishDate | 2018-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-cbc682d84b214f9db435530a0805112f2022-12-22T01:43:18ZengPublic Library of Science (PLoS)PLoS ONE1932-62032018-01-01134e019232410.1371/journal.pone.0192324Optimization of NO oxidation by H2O2 thermal decomposition at moderate temperatures.Hai-Qian ZhaoZhong-Hua WangXing-Cun GaoCheng-Hao LiuHan-Bing QiH2O2 was adopted to oxidize NO in simulated flue gas at 100-500°C. The effects of the H2O2 evaporation conditions, gas temperature, initial NO concentration, H2O2 concentration, and H2O2:NO molar ratio on the oxidation efficiency of NO were investigated. The reason for the narrow NO oxidation temperature range near 500°C was determined. The NO oxidation products were analyzed. The removal of NOx using NaOH solution at a moderate oxidation ratio was studied. It was proven that rapid evaporation of the H2O2 solution was critical to increase the NO oxidation efficiency and broaden the oxidation temperature range. the NO oxidation efficiency was above 50% at 300-500°C by contacting the outlet of the syringe needle and the stainless-steel gas pipe together to spread H2O2 solution into a thin film on the surface of the stainless-steel gas pipe, which greatly accelerated the evaporation of H2O2. The NO oxidation efficiency and the NO oxidation rate increased with increasing initial NO concentration. This method was more effective for the oxidation of NO at high concentrations. H2O2 solution with a concentration higher than 15% was more efficient in oxidizing NO. High temperatures decreased the influence of the H2O2 concentration on the NO oxidation efficiency. The oxidation efficiency of NO increased with an increase in the H2O2:NO molar ratio, but the ratio of H2O2 to oxidized NO decreased. Over 80% of the NO oxidation product was NO2, which indicated that the oxidation ratio of NO did not need to be very high. An 86.7% NO removal efficiency was obtained at an oxidation ratio of only 53.8% when combined with alkali absorption.http://europepmc.org/articles/PMC5905985?pdf=render |
| spellingShingle | Hai-Qian Zhao Zhong-Hua Wang Xing-Cun Gao Cheng-Hao Liu Han-Bing Qi Optimization of NO oxidation by H2O2 thermal decomposition at moderate temperatures. PLoS ONE |
| title | Optimization of NO oxidation by H2O2 thermal decomposition at moderate temperatures. |
| title_full | Optimization of NO oxidation by H2O2 thermal decomposition at moderate temperatures. |
| title_fullStr | Optimization of NO oxidation by H2O2 thermal decomposition at moderate temperatures. |
| title_full_unstemmed | Optimization of NO oxidation by H2O2 thermal decomposition at moderate temperatures. |
| title_short | Optimization of NO oxidation by H2O2 thermal decomposition at moderate temperatures. |
| title_sort | optimization of no oxidation by h2o2 thermal decomposition at moderate temperatures |
| url | http://europepmc.org/articles/PMC5905985?pdf=render |
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