The use of vacuum ultraviolet irradiation to oxidize SO2 and NOx for simultaneous desulfurization and denitrification

Ye, Junhui; Shang, Jing; Li, Qian; Xu, Weiwei; Liu, Jia; Feng, Xiang; Zhu, Tong

doi:10.1016/j.jhazmat.2014.02.011

Cited by 67 publications

(42 citation statements)

References 31 publications

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“…2014;Ye et al 2014). In recent years, some researchers try to use several photochemical AOTs to 1372 remove gaseous pollutants such as SO 2 , NO x , VOCs, Hg 0 , etc., and also show a good prospect(Dickinson, et al.…”

mentioning

confidence: 99%

A review on removal of elemental mercury from flue gas using advanced oxidation process: Chemistry and process

Liu

Adewuyi

2016

Chemical Engineering Research and Design

140

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mentioning

confidence: 99%

A review on removal of elemental mercury from flue gas using advanced oxidation process: Chemistry and process

Liu

Adewuyi

2016

Chemical Engineering Research and Design

140

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“…When pollutants SO 2 and NO encounter H 2 O 2 and the active species O 3 , ·O, and ·OH, the oxidation removal reactions (6)–() occur:

{normalSO}_{2} + H_{2} O \Leftrightarrow {normalHSO}_{3}^{-} + H^{+}

{normalHSO}_{3}^{-} \Leftrightarrow {normalSO}_{3}^{2 -} + H^{+}

{normalHSO}_{3}^{-} + \cdot OH \to \cdot {normalSO}_{3}^{-} + H_{2} O

{normalSO}_{3}^{2 -} + \cdot OH \to \cdot {normalSO}_{3}^{-} + {normalOH}^{-}

{normalHSO}_{3}^{-} + H_{2} O_{2} \to {normalSO}_{4}^{2 -} + H_{2} O

{normalSO}_{3}^{2 -} + H_{2} O_{2} \to {normalSO}_{4}^{2 -} + H_{2} O

{normalHSO}_{3}^{-} + \cdot O \to {normalSO}_{4}^{-} \cdot + \cdot H

{normalSO}_{3}^{2 -} + O_{3} \to {normalSO}_{4}^{2 -} + O_{2}

…”

Section: Methodsmentioning

confidence: 99%

“…Large‐scale emissions of sulfur dioxide (SO 2 ) and nitric oxides (NO x ) from coal‐fired flue gas have caused serious environmental pollution issues, such as acid rain, photochemical smog and regional haze . Currently, the mainstream removal technologies for SO 2 and NO x are limestone‐based wet flue gas desulfurization (Ca‐WFGD) and ammonia‐based selective reduction (NH 3 ‐SCR), respectively, in coal‐fired power plants .…”

Section: Introductionmentioning

confidence: 99%

“…Compared with UV light, VUV light can excite and decompose O 2 and H 2 O (both O 2 and H 2 O are the main components of flue gas and H 2 O 2 solution) to generate highly active species, O 3 , ·O, and ·OH . Ye et al . presented a simple and efficient method for simultaneous desulfurization and denitrification via VUV irradiation with no additional chemicals, and the simultaneous removal of 90% SO 2 and 96% NO x (NO+NO 2 ) was achieved.…”

Section: Introductionmentioning

confidence: 99%

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Effects of experimental parameters on simultaneous removal of SO₂ and NO by VUV/H₂O₂ advanced oxidation process in a pilot‐scale photochemical spraying tower

Xie

Zhang

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND: Emissions of SO 2 and NO from flue gas have caused serious environmental pollution issues. UV/vacuum ultraviolet(VUV)-activated H 2 O 2 advanced oxidation technology is one of the most promising processes to realize the simultaneous removal of SO 2 and NO. From the application perspective, it is necessary to carry out further research in a pilot-scale photochemical reactor with industrial conditions and actual coal-fired flue gas running conditions. RESULTS: Results showed that SO 2 removal efficiency can reach 100% under most experimental conditions. An increase of the VUV irradiation intensity, H 2 O 2 concentration and solution pH can promote NO removal, but the growth rate of that gradually slows down. It is not conducive to NO removal when the flue gas flow and NO concentration increases. Increasing liquid-gas ratio has dual effects on NO removal; NO removal efficiency increases at first, and then decreases sharply. SO 2 concentration has no great impact on removal of NO. Results of ion chromatography (IC) demonstrate that SO 4 2− and NO 3 − are the major removal products of SO 2 and NO. CONCLUSION: The VUV-activated H 2 O 2 advanced oxidation technology is suitable for industrial application. The investment and operating costs of this technology are lower than those of the combined processes NH 3 -SCR and Ca-WFGD.

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“…Once released into the atmosphere, they could cause detrimental effects to human health and ecosystems, including acid rain, photochemical smog, ozone destruction and atmospheric visibility degradation [1][2][3]. Typically, the wet flue gas desulfurization (WFGD-Ca) combined with selective catalytic reduction (NH 3 -SCR) was commercialized well due to its high removal efficiency of SO 2 and NO x .…”

Section: Introductionmentioning

confidence: 99%

Simultaneous photocatalytic elimination of gaseous NO and SO 2 in a BiOI/Al 2 O 3 -padded trickling scrubber under visible light

Xia

et al. 2015

Chemical Engineering Journal

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The use of vacuum ultraviolet irradiation to oxidize SO2 and NOx for simultaneous desulfurization and denitrification

Cited by 67 publications

References 31 publications

A review on removal of elemental mercury from flue gas using advanced oxidation process: Chemistry and process

A review on removal of elemental mercury from flue gas using advanced oxidation process: Chemistry and process

Effects of experimental parameters on simultaneous removal of SO₂ and NO by VUV/H₂O₂ advanced oxidation process in a pilot‐scale photochemical spraying tower

Simultaneous photocatalytic elimination of gaseous NO and SO 2 in a BiOI/Al 2 O 3 -padded trickling scrubber under visible light

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The use of vacuum ultraviolet irradiation to oxidize SO2 and NOx for simultaneous desulfurization and denitrification

Cited by 67 publications

References 31 publications

A review on removal of elemental mercury from flue gas using advanced oxidation process: Chemistry and process

A review on removal of elemental mercury from flue gas using advanced oxidation process: Chemistry and process

Effects of experimental parameters on simultaneous removal of SO2 and NO by VUV/H2O2 advanced oxidation process in a pilot‐scale photochemical spraying tower

Simultaneous photocatalytic elimination of gaseous NO and SO 2 in a BiOI/Al 2 O 3 -padded trickling scrubber under visible light

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Effects of experimental parameters on simultaneous removal of SO₂ and NO by VUV/H₂O₂ advanced oxidation process in a pilot‐scale photochemical spraying tower