Oxidation Removal of Nitric Oxide from Flue Gas Using UV Photolysis of Aqueous Hypochlorite

Liu, Yangxian; Wang, Yan; Liu, Ziyang; Wang, Qian

doi:10.1021/acs.est.7b03628

Cited by 92 publications

(70 citation statements)

References 47 publications

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“…

H_{H g^{0}, L, x}

were calculated by the methods/correlations which were described in the references;

D_{H g^{0}, L, x}

were calculated using the Wilke‐Chang empirical equation;

k_{H g^{0}, L, x}

k_{H g^{0}, G, x}

, and

a_{H g^{0}}_{, x}

were measured using Danckwerts‐plot‐theory and chemical methods . The described measurement and calculation methods can be seen in the Supporting Information.…”

Section: Resultssupporting

confidence: 60%

“…On the basis of the rate Eq. , the double‐film theory and the previous results, for a fast reaction, the rate equations of Hg 0 oxidation removal using heat/Fe 2+ /PMS/H 2 O 2 , heat/Mn 2+ /PMS/H 2 O 2 , heat/Fe 2+ /PMS, and heat/Mn 2+ /PMS removal systems can be described as the following expression (29) (a more detailed derivation process for expression (29) can be found in supplementary materials):

N_{H g^{0}, x} = {(\frac{2 D_{H g^{0}, L, x} \cdot k_{o v m_{x}, m_{x}, n_{x}, h_{x}, l_{x}}^{} \cdot C_{H g^{0}, i, x}^{m_{x} + 1}}{m_{x} + 1})}^{1 / 2}

where

N_{H g^{0}, x}

represents the Hg 0 absorption rate in heat/Fe 2+ /PMS/H 2 O 2 , heat/Mn 2+ /PMS/H 2 O 2 , heat/Fe 2+ /PMS, or heat/Mn 2+ /PMS removal systems, mol/m 2 ⋅s;

D_{H g^{0}, L, x}

represents the liquid phase diffusion coefficient for Hg 0 , m 2 /s.…”

Section: Resultsmentioning

confidence: 85%

“…Based on the results of products and mechanism of Hg 0 oxidation removal, the total chemical reaction of Hg 0 oxidation removal can be described via the Eq. as below:

a {Hg}^{0} + b {normalM}^{2 +} + c Oxidants \overset{heat}{\to} d {Hg}^{2 +} + e {normalM}^{3 +} + f Other by - products

where a,b,c,d,e,f , respectively, represent the stoichiometric coefficients for Hg 0 , M 2+ , oxidants, Hg 2+ , M 3+ , and other by‐products. M 2+ represents Fe 2+ or Mn 2+ ; M 3+ represents Fe 3+ or Mn 3+ ; oxidant represents PMS/H 2 O 2 or PMS.…”

Section: Resultsmentioning

confidence: 99%

“…On the basis of the chemical reaction kinetics theory, the chemical reaction rate equation of Hg 0 oxidation removals by heat/M 2+ /PMS/H 2 O 2 and heat/M 2+ /PMS activation systems can be, respectively, expressed as the following Eqs. and :

r_{H g^{0}, x} = k_{m_{x}, n_{x}, h_{x}, l_{x}}^{} \cdot C_{H g^{0}, i, x}^{m_{x}} \cdot C_{M^{2 +}, x}^{n_{x}} \cdot C_{P M S, x}^{h_{x}} \cdot C_{H_{2} O_{2}, x}^{l_{x}}

r_{H g^{0}, x} = k_{m_{x}, n_{x}, h_{x}}^{} \cdot C_{H g^{0}, i, x}^{m_{x}} \cdot C_{M^{2 +}, x}^{n_{x}} \cdot C_{P M S, x}^{h_{x}}

where

r_{H g^{0}, x}

represents the chemical reaction rate of Hg 0 in heat/Fe 2+ /PMS/H 2 O 2 , heat/Mn 2+ /PMS/H 2 O 2 , heat/Fe 2+ /PMS, and heat/Mn 2+ /PMS removal systems,

m o l / (L \cdot s)

, respectively;

k_{m_{x}, n_{x}, h_{x}, l_{x}}^{}

represents the pseudo‐( m x +n x +h x +l x )‐order rate constant for the reaction (26),

L^{(m_{x} + n_{x} + h_{x} + l_{x} - 1)} \cdot m o l^{(1 - m_{x} - n_{x} - h_{x} -}

…”

Section: Resultsmentioning

confidence: 99%

“…Besides, the period of each experiment is only 16 min. Therefore, compared with

C_{H g^{0}, i, x}

, all of

C_{M^{2 +}, x}

C_{P M S, x}

, and

C_{H_{2} O_{2}, x}

are very huge, and can be approximately as the constants based on the excess concentration method . Thus the chemical reaction rate Eqs.…”

Section: Resultsmentioning

confidence: 99%

See 4 more Smart Citations

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H₂O₂ Solutions

Liu

Wang

2018

AIChE Journal

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in Wiley Online Library (wileyonlinelibrary.com)Several novel oxidation removal processes of elemental mercury (Hg 0 ) from flue gas using combined Fe 2+ /Mn 2+ and heat activated peroxymonosulfate (PMS)/H 2 O 2 solutions in a bubbling reactor were proposed. The operating parameters (e.g., PMS/H 2 O 2 concentration, Fe 2+ /Mn 2+ concentration, solution pH, activation temperature, and Hg 0 /NO/SO 2 /O 2 / CO 2 concentration), mechanism and mass transfer-reaction kinetics of Hg 0 removal were investigated. The results show that heat and Fe 2+ /Mn 2+ have significant synergistic effect for activating PMS and PMS/H 2 O 2 to produce free radicals to oxidize Hg 0 . Hg 0 removal is strongly affected by PMS/H 2 O 2 concentration, Fe 2+ /Mn 2+ concentration, activation temperature, and solution pH. SO − 4 · and ·OH produced from combined heat and Fe 2+ /Mn 2+ activated PMS/H 2 O 2 play a leading role in Hg 0 removal. Under optimized experimental conditions, Hg 0 removal efficiencies reach 100, 94.9, 66.9, and 58.9% in heat/Fe 2+ /PMS/H 2 O 2 , heat/Mn 2+ /PMS/H 2 O 2 , heat/Fe 2+ /PMS, and heat/Mn 2+ /PMS systems, respectively. Hg 0 removal processes in four systems belong to fast reaction and were controlled by mass transfer under optimized experimental conditions.

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“…

H_{H g^{0}, L, x}

were calculated by the methods/correlations which were described in the references;

D_{H g^{0}, L, x}

were calculated using the Wilke‐Chang empirical equation;

k_{H g^{0}, L, x}

k_{H g^{0}, G, x}

, and

a_{H g^{0}}_{, x}

were measured using Danckwerts‐plot‐theory and chemical methods . The described measurement and calculation methods can be seen in the Supporting Information.…”

Section: Resultssupporting

confidence: 60%

N_{H g^{0}, x} = {(\frac{2 D_{H g^{0}, L, x} \cdot k_{o v m_{x}, m_{x}, n_{x}, h_{x}, l_{x}}^{} \cdot C_{H g^{0}, i, x}^{m_{x} + 1}}{m_{x} + 1})}^{1 / 2}

where

N_{H g^{0}, x}

represents the Hg 0 absorption rate in heat/Fe 2+ /PMS/H 2 O 2 , heat/Mn 2+ /PMS/H 2 O 2 , heat/Fe 2+ /PMS, or heat/Mn 2+ /PMS removal systems, mol/m 2 ⋅s;

D_{H g^{0}, L, x}

represents the liquid phase diffusion coefficient for Hg 0 , m 2 /s.…”

Section: Resultsmentioning

confidence: 85%

“…Based on the results of products and mechanism of Hg 0 oxidation removal, the total chemical reaction of Hg 0 oxidation removal can be described via the Eq. as below:

a {Hg}^{0} + b {normalM}^{2 +} + c Oxidants \overset{heat}{\to} d {Hg}^{2 +} + e {normalM}^{3 +} + f Other by - products

Section: Resultsmentioning

confidence: 99%

r_{H g^{0}, x} = k_{m_{x}, n_{x}, h_{x}, l_{x}}^{} \cdot C_{H g^{0}, i, x}^{m_{x}} \cdot C_{M^{2 +}, x}^{n_{x}} \cdot C_{P M S, x}^{h_{x}} \cdot C_{H_{2} O_{2}, x}^{l_{x}}

r_{H g^{0}, x} = k_{m_{x}, n_{x}, h_{x}}^{} \cdot C_{H g^{0}, i, x}^{m_{x}} \cdot C_{M^{2 +}, x}^{n_{x}} \cdot C_{P M S, x}^{h_{x}}

where

r_{H g^{0}, x}

represents the chemical reaction rate of Hg 0 in heat/Fe 2+ /PMS/H 2 O 2 , heat/Mn 2+ /PMS/H 2 O 2 , heat/Fe 2+ /PMS, and heat/Mn 2+ /PMS removal systems,

m o l / (L \cdot s)

, respectively;

k_{m_{x}, n_{x}, h_{x}, l_{x}}^{}

represents the pseudo‐( m x +n x +h x +l x )‐order rate constant for the reaction (26),

L^{(m_{x} + n_{x} + h_{x} + l_{x} - 1)} \cdot m o l^{(1 - m_{x} - n_{x} - h_{x} -}

…”

Section: Resultsmentioning

confidence: 99%

“…Besides, the period of each experiment is only 16 min. Therefore, compared with

C_{H g^{0}, i, x}

, all of

C_{M^{2 +}, x}

C_{P M S, x}

, and

C_{H_{2} O_{2}, x}

are very huge, and can be approximately as the constants based on the excess concentration method . Thus the chemical reaction rate Eqs.…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H₂O₂ Solutions

Liu

Wang

2018

AIChE Journal

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Oxygen‐Bridged Copper–Iron Atomic Pair as Dual‐Metal Active Sites for Boosting Electrocatalytic NO Reduction

Wang

Zhu

et al. 2023

Advanced Materials

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Electrocatalytic reduction of nitric oxide (NO) to ammonia (NH3) is a promising approach to NH3 synthesis. However, due to the lack of efficient electrocatalysts, the performance of electrocatalytic NO reduction reaction (NORR) is far from satisfactory. Herein, it is reported that an atomic copper–iron dual‐site electrocatalyst bridged by an axial oxygen atom (OFeN6Cu) is anchored on nitrogen‐doped carbon (CuFe DS/NC) for NORR. The CuFe DS/NC can significantly enhance the electrocatalytic NH3 synthesis performance (Faraday efficiency, 90%; yield rate, 112.52 µmol cm−2 h−1) at −0.6 V versus RHE, which is dramatically higher than the corresponding Cu single‐atom, Fe single‐atom and all NORR single‐atom catalysts in the literature so far. Moreover, an assembled proof‐of‐concept Zn–NO battery using CuFe DS/NC as the cathode outputs a power density of 2.30 mW cm−2 and an NH3 yield of 45.52 µg h−1 mgcat−1. The theoretical calculation result indicates that bimetallic sites can promote electrocatalytic NORR by changing the rate‐determining step and accelerating the protonation process. This work provides a flexible strategy for efficient sustainable NH3 synthesis.

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Selective Electrocatalytic Conversion of Nitric Oxide to High Value‐Added Chemicals

Wang,

Lu,

Luan

et al. 2024

Advanced Materials

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The artificial disturbance in the nitrogen cycle has necessitated an urgent need for nitric oxide (NO) removal. Electrochemical technologies for NO conversion have gained increasing attention in recent years. This comprehensive review presents the recent advancements in selective electrocatalytic conversion of NO to high value‐added chemicals, with specific emphasis on catalyst design, electrolyte composition, mass diffusion, and adsorption energies of key intermediate species. Furthermore, the review explores the synergistic electrochemical co‐electrolysis of NO with specific carbon source molecules, enabling the synthesis of a range of valuable chemicals with C‐N bonds. It also provides in‐depth insights into the intricate reaction pathways and underlying mechanisms, offering valuable perspectives on the challenges and prospects of selective NO electrolysis. By advancing comprehension and fostering awareness of nitrogen cycle balance, this review contributes to the development of efficient and sustainable electrocatalytic systems for the selective synthesis of valuable chemicals from NO.This article is protected by copyright. All rights reserved

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Oxidation Removal of Nitric Oxide from Flue Gas Using UV Photolysis of Aqueous Hypochlorite

Cited by 92 publications

References 47 publications

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H₂O₂ Solutions

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H₂O₂ Solutions

Oxygen‐Bridged Copper–Iron Atomic Pair as Dual‐Metal Active Sites for Boosting Electrocatalytic NO Reduction

Selective Electrocatalytic Conversion of Nitric Oxide to High Value‐Added Chemicals

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Oxidation Removal of Nitric Oxide from Flue Gas Using UV Photolysis of Aqueous Hypochlorite

Cited by 92 publications

References 47 publications

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H2O2 Solutions

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H2O2 Solutions

Oxygen‐Bridged Copper–Iron Atomic Pair as Dual‐Metal Active Sites for Boosting Electrocatalytic NO Reduction

Selective Electrocatalytic Conversion of Nitric Oxide to High Value‐Added Chemicals

Contact Info

Product

Resources

About

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H₂O₂ Solutions

Gaseous Elemental Mercury Removal Using Combined Metal Ions and Heat Activated Peroxymonosulfate/H₂O₂ Solutions