Mechanism and kinetics of Fe(II)EDTA NO reduction by iron powder under anaerobic condition

Because of their exotic electronic properties and abundant active sites, two-dimensional (2D) materials have potential in various fields. Pursuing a general synthesis methodology of 2D materials and advancing it from the laboratory to industry is of great importance. This type of method should be low cost, rapid and highly efficient. Here, we report the high-yield synthesis of 2D metal oxides and hydroxides via a molten salts method. We obtained a high-yield of 2D ion-intercalated metal oxides and hydroxides, such as cation-intercalated manganese oxides (Na0.55Mn2O4·1.5H2O and K0.27MnO2·0.54H2O), cation-intercalated tungsten oxides (Li2WO4 and Na2W4O13), and anion-intercalated metal hydroxides (Zn5(OH)8(NO3)2·2H2O and Cu2(OH)3NO3), with a large lateral size and nanometre thickness in a short time. Using 2D Na2W4O13 as an electrode, a high performance electrochemical supercapacitor is achieved. We anticipate that our method will enable new path to the high-yield synthesis of 2D materials for applications in energy-related fields and beyond.

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“…According to the Arrhenius equation 30 , we can obtain the relationship of k a and k b (see details in Supplementary Note 3 ):…”

Section: Resultsmentioning

confidence: 99%

“…In this context, according to the Arrhenius equation (ref. 30 ), the energy consumption for desolvation increases the overall activation energy, thus limiting the reaction rate. In addition, incompletely desolvated ions cause lattice distortion, which decreases the quality of 2D materials.…”

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confidence: 99%

Rapid mass production of two-dimensional metal oxides and hydroxides via the molten salts method

et al. 2017

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“…The conversion of bonded NO from Fe II EDTA-NO is critical to determine which nitrogen compounds were produced. In our previous research, 9,26 the bonded NO from Fe II EDTA-NO was transformed to NH 4 + when zinc or iron powder was employed to reduce Fe II EDTA-NO. Consequently, when it refers to Fe II EDTA-NO reduction by SD, NH 4 + also is considered as the main product.…”

Section: Resultsmentioning

confidence: 99%

Simultaneous removal of NO and SO₂ from flue gas by Fe^IIEDTA/sodium dithionite solutions

Zhu

Chen

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND The SO2 and NO emitted from coal‐fired power plants have caused serious air pollution in China. FeIIEDTA complexation technology is one of the most promising processes to realize the simultaneous removal of SO2 and NO. However, FeIIEDTA is easily oxidized to FeIIIEDTA, causing loss of activity, which limits its further application. To solve this problem, sodium dithionite (SD) combined with FeIIEDTA was used for the simultaneous removal of SO2 and NO. RESULTS Results showed that the SO2 removal efficiencies were ≈92–99% in all experiments, whereas the NO removal fluctuated substantially under different operating conditions. Specifically, SD can markedly improve NO removal efficiency, and the optimal FeIIEDTA:SD ratio was 3 mmol L–1:0.026 mol L–1. With increasing temperature, pH value, SO2 concentration or O2 concentration, the NO removal efficiency increased first and then decreased. As the NO concentration increased, the NO removal efficiency continually decreased. Finally, based on the analysis of different ion concentrations, the main products were identified as sulfite, sulfate, ammonium, nitrite and nitrate. CONCLUSION The synergistic mechanism of SD and FeIIEDTA on SO2 and NO was investigated. SD can regenerate FeIIEDTA solution by reducing FeIIIEDTA and FeIIEDTA‐NO. These fundamental findings can offer valuable guidance for industrial denitrification and desulfurization by mixed FeIIEDTA and SD systems. © 2019 Society of Chemical Industry

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“…The impact of temperature on reduction was examined by four various temperature (30,40,50, and 60 C). The impact of temperature on reduction was examined by four various temperature (30,40,50, and 60 C).…”

Section: Influence Of the Temperaturementioning

confidence: 99%

“…Temperature can affect the molecule movement and change chemical rate. The impact of temperature on reduction was examined by four various temperature (30,40,50, and 60 C). It can be found from Figure 7a that Fe II EDTA-NO reducing rate increases when temperature increase.…”

Section: Influence Of the Temperaturementioning

confidence: 99%

Evaluation of Fe^IIEDTA‐NO reduction by thiourea dioxide in NO removal with Fe^IIEDTA

Zhu

Chen

et al. 2019

Asia-Pacific J Chem Eng

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Reducing Fe II EDTA-NO is key for NO absorption with Fe II EDTA absorbent.In this work, the reducing agent thiourea dioxide (TD) was for the first time employed for reducing Fe II EDTA-NO. The behavior and kinetics of reducing Fe II EDTA-NO with TD had been examined with different pH value, varied TD concentrations, and various temperatures. The results investigated that Fe II EDTA-NO reducing rate rose with pH value increasing as well as elevated temperature. The reaction order of Fe II EDTA-NO by TD was proved to be 2 on Fe II EDTA-NO. Meanwhile, activating energy, activating entropy, and activating enthalpy of reducing Fe II EDTA-NO by TD were separately calculated to be 49.583 kJ mol −1 , −64.956 J k −1 mol −1 , and 46.943 kJ mol −1 . The simultaneous reduction of Fe III EDTA and Fe II EDTA-NO by TD was investigated. Results showed that TD was more powerful in reducing Fe III EDTA and Fe II EDTA-NO compared with other reduction systems. Finally, nitric oxide removal experiment illustrates that TD can remarkably strengthen the NO removal with Fe II EDTA solution. These theoretical findings could provide constructive suggestions for industrial tail gas denitrification employing associative Fe II EDTA and TD system.

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Mechanism and kinetics of Fe(II)EDTA NO reduction by iron powder under anaerobic condition

Cited by 39 publications

References 40 publications

Rapid mass production of two-dimensional metal oxides and hydroxides via the molten salts method

Rapid mass production of two-dimensional metal oxides and hydroxides via the molten salts method

Simultaneous removal of NO and SO₂ from flue gas by Fe^IIEDTA/sodium dithionite solutions

Evaluation of Fe^IIEDTA‐NO reduction by thiourea dioxide in NO removal with Fe^IIEDTA

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Mechanism and kinetics of Fe(II)EDTA NO reduction by iron powder under anaerobic condition

Cited by 39 publications

References 40 publications

Rapid mass production of two-dimensional metal oxides and hydroxides via the molten salts method

Rapid mass production of two-dimensional metal oxides and hydroxides via the molten salts method

Simultaneous removal of NO and SO2 from flue gas by FeIIEDTA/sodium dithionite solutions

Evaluation of FeIIEDTA‐NO reduction by thiourea dioxide in NO removal with FeIIEDTA

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Simultaneous removal of NO and SO₂ from flue gas by Fe^IIEDTA/sodium dithionite solutions

Evaluation of Fe^IIEDTA‐NO reduction by thiourea dioxide in NO removal with Fe^IIEDTA