4.6 Article

Follow-up Research on Simultaneous Removal of NO and SO2 by Wet Scrubbing NaClO Solution Combined In Situ with Ozone Oxidation: Performance and Mechanism

期刊

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.2c01888

关键词

-

资金

  1. National Natural Science Foundation of China
  2. Natural Science Foundation of Liaoning Province of China
  3. Guangdong Province Natural Resources Project
  4. Fundamental Research Funds for the Central Universities
  5. [51779024]
  6. [51979045]
  7. [2020MS130]
  8. [2022-32]
  9. [3132019330]

向作者/读者索取更多资源

This study investigates the synergistic effect of dual oxidants NaClO and O3 on the removal of NOx. The results show that high NOx removal efficiency can be achieved under specific molar ratios and concentrations. The reaction paths and influencing factors of wet scrubbing NaClO solution in situ with O3 injection in the denitration process are also analyzed.
Previous work proposed a one-stage wet scrubbing in situ combined with O3 oxidation for simultaneous removal of NO and SO2 from flue gas, and the results showed that wet scrubbing combined in situ with O3 injection could effectively improve O3 oxidant utilization efficiency. In this work, a follow-up research work was carried out to further explore the synergistic effect of dual oxidants of NaClO in the liquid phase and O3 in gas phase. The synergistic effects of O3/NO molar ratio and NaClO concentration in the circulating scrubbing solution on NOx removal performance was investigated systematically. The results showed that when molar ratio of O3/NO was 0.5 and NaClO concentration was 25 mM, NO could be oxidized completely and averaged NOx removal efficiency exceeded 70%. NOx concentrations in outlet gas and anion compositions in the scrubbed solution were analyzed, and the possible reaction paths of wet scrubbing NaClO solution in situ with O3 injection in denitration process were also discussed. When the solution pH was around 6, a relative balance between NOx oxidation and absorption might be achieved, resulting in a high NOx removal efficiency. The temperature of inlet flue gas imposed little impact on NOx removal efficiency due to the quick and efficient cooling effect by wet scrubbing. The increase of initial SO2 concentration led to a slight increase of NOx removal efficiency from 70 to 73.5%. A complete removal of SO2 could be achieved, but coexisting SO2 in flue gas would consume NaClO oxidant and shorten the reaction duration.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据