Simultaneous Removal of NOx and SO2 by MgO Combined with O3 Oxidation: The Influencing Factors and O3 Consumption Distributions | Zendy

Yang Zou | Zendy; Xiaolong Liu | Zendy; Tingyu Zhu | Zendy; Mengkui Tian | Zendy; Maoyu Cai | Zendy; Ziwei Zhao | Zendy; Heng Wu | Zendy

Open Access

Simultaneous Removal of NO_x and SO₂ by MgO Combined with O₃ Oxidation: The Influencing Factors and O₃ Consumption Distributions

Author(s) -

Yang Zou,

Xiaolong Liu,

Tingyu Zhu,

Mengkui Tian,

Maoyu Cai,

Ziwei Zhao,

Heng Wu

Publication year - 2019

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.9b02502

Subject(s) - molar ratio , decomposition , yield (engineering) , analytical chemistry (journal) , chemistry , redox , absorption (acoustics) , ozone , molar concentration , slurry , materials science , inorganic chemistry , nuclear chemistry , catalysis , environmental chemistry , metallurgy , organic chemistry , composite material

Simultaneous removal of NO x and SO 2 by MgO combined with O 3 oxidation was studied. The effects of the O 3 /NO molar ratio, oxidation temperature, and oxidation residence time on N 2 O 5 decomposition and O 3 consumption distributions were systematically illustrated, which is of great significance for improving NO x removal efficiency and reducing O 3 consumption in practical application. When the O 3 /NO molar ratio was greater than 1.0, the highest N 2 O 5 yield was achieved at 90 °C. The NO x removal efficiency reached 96.5% at an O 3 /NO molar ratio of 1.8. The oxidation temperature increased from 90 to 130 °C, resulting in the decrease of N 2 O 5 yield, the improvement of O 3 -ICC (O 3 invalid cycle consumption) caused by N 2 O 5 decomposition, and the decrease of NO x removal efficiency from 96.5 to 76%. Besides, the effects of pH, SO 2 concentration, and MgSO 3 addition on NO x removal efficiency were also investigated. The results showed that the removal efficiency of NO x decreased with the increase of SO 2 concentration, while MgSO 3 addition into MgO slurry could promote the absorption of NO 2 due to the reaction between NO 2 and SO 3 2- .

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