Buffer effect of MgO on Na2SO3 to stabilize S(IV) for the enhancement in simultaneous absorption of NOx and SO2 from non-ferrous smelting gas

Huang, Wenjun; Li, Sichao; Wang, Hongbin; Cui, Peng; Xu, Haomiao; Cheng, Can; Qu, Zan; Yan, Naiqiang

doi:10.1007/s11356-022-20748-3

Environ Sci Pollut Res

2022

DOI: 10.1007/s11356-022-20748-3

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Buffer effect of MgO on Na2SO3 to stabilize S(IV) for the enhancement in simultaneous absorption of NOx and SO2 from non-ferrous smelting gas

Wenjun Huang

Sichao Li

Hongbin Wang³

et al.

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2024

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Utilizing l-Ascorbic Acid to Inhibit Adverse Oxidation and Enhance Denitration Efficiency during Sulfite Solution Absorption of NO₂: Mechanism and Process Parameters

Qian,

Liu,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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In the typical wet flue gas denitration technology using sulfite solutions, the rapid free radical chain reaction of SO 3•− oxidation by O 2 is the main reason for the significant consumption of absorbents and inefficient denitration. The study utilizes L-ascorbic acid (VC) to inhibit the free radical chain reaction. VC combined with SO 3•− to form stable compounds, which hindered the oxidation of SO 3•− to SO 5 •− by O 2 , leading to an 80.7 mol % decrease in Na 2 SO 3 consumption by adding millimolar-level VC. Compared to the sulfite solution, the best denitration efficiency of the VC/Na 2 SO 3 mixture solution increased from 94.4 to 99.2 vol %, and the absorption time for absorption efficiency above 90 vol % was extended from 7 to 72 min. Additionally, a macro absorption model describing the rates of macro absorption was established based on various operating conditions.

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Utilizing l-Ascorbic Acid to Inhibit Adverse Oxidation and Enhance Denitration Efficiency during Sulfite Solution Absorption of NO₂: Mechanism and Process Parameters

Qian,

Liu,

Wang

et al. 2024

Ind. Eng. Chem. Res.

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show abstract

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Buffer effect of MgO on Na2SO3 to stabilize S(IV) for the enhancement in simultaneous absorption of NOx and SO2 from non-ferrous smelting gas

Cited by 1 publication

References 40 publications

Utilizing l-Ascorbic Acid to Inhibit Adverse Oxidation and Enhance Denitration Efficiency during Sulfite Solution Absorption of NO₂: Mechanism and Process Parameters

Utilizing l-Ascorbic Acid to Inhibit Adverse Oxidation and Enhance Denitration Efficiency during Sulfite Solution Absorption of NO₂: Mechanism and Process Parameters

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Buffer effect of MgO on Na2SO3 to stabilize S(IV) for the enhancement in simultaneous absorption of NOx and SO2 from non-ferrous smelting gas

Cited by 1 publication

References 40 publications

Utilizing l-Ascorbic Acid to Inhibit Adverse Oxidation and Enhance Denitration Efficiency during Sulfite Solution Absorption of NO2: Mechanism and Process Parameters

Utilizing l-Ascorbic Acid to Inhibit Adverse Oxidation and Enhance Denitration Efficiency during Sulfite Solution Absorption of NO2: Mechanism and Process Parameters

Contact Info

Product

Resources

About

Utilizing l-Ascorbic Acid to Inhibit Adverse Oxidation and Enhance Denitration Efficiency during Sulfite Solution Absorption of NO₂: Mechanism and Process Parameters

Utilizing l-Ascorbic Acid to Inhibit Adverse Oxidation and Enhance Denitration Efficiency during Sulfite Solution Absorption of NO₂: Mechanism and Process Parameters