New insights about the electrochemical production of ozone

Rodríguez-Peña, M.; Barrios, J.A.; Llanos, Javier; Sáez, Cristina; Rodrigo, Manuel A.; Barrera-Díaz, Carlos

doi:10.1016/j.coelec.2021.100697

Cited by 43 publications

(22 citation statements)

References 69 publications

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“…However, because of the very fast interaction with hydrogen peroxide, they are not expected to be detected, and what we can see is simply their effect in the increased decomposition of hydrogen peroxide. 27 , 30 , 31 Additionally, it is important to take into consideration that oxygen solubility depends inversely on the salinity of the reaction media. Then, the higher the perchloric acid concentration is, the lower the concentration of dissolved oxygen is.…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Production of Hydrogen Peroxide in Perchloric Acid Supporting Electrolytes for the Synthesis of Chlorine Dioxide

Monteiro

Moratalla

Sáez

et al. 2022

Ind. Eng. Chem. Res.

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This work focuses on the electrochemical production of hydrogen peroxide in supporting electrolytes containing perchlorate ions for being used as a reagent in the reduction of chlorates to produce chlorine dioxide, as a first step in the manufacture of portable ClO 2 production devices. This study evaluates the effect of the current density, pressure, and temperature on the production of hydrogen peroxide, and concentrations over 400 mg L –1 are reached. The average rate for the formation of hydrogen peroxide is 9.85 mg h –1 , and the effect of increasing electrolyte concentration (3.0 and 30.0 g L –1 perchloric acid), intensity, and pressure results in values of, respectively, −2.99, −4.49, and +7.73 mg h –1 . During the manufacturing process, hydrogen peroxide is decomposed through two mechanisms. The average destruction rate is 1.93 mg h –1 , and the effects of the three factors results in values of, respectively, +0.07, +0.11, and −0.12 mg h –1 . Solutions of this hydrogen peroxide produced electrochemically in a perchloric acid aqueous electrolyte were used to reduce chlorates in strongly acidic media and produce chlorine dioxide. Conversions of around 100% were obtained, demonstrating that this electrochemical product can be used efficiently to reduce chlorates to chlorine dioxide.

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Section: Resultsmentioning

confidence: 99%

Electrochemical Production of Hydrogen Peroxide in Perchloric Acid Supporting Electrolytes for the Synthesis of Chlorine Dioxide

Monteiro

Moratalla

Sáez

et al. 2022

Ind. Eng. Chem. Res.

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“…In previous literatures, various electrode materials, especially PbO 2 (Wang et al 2008;Wang & Jing 2012), Pt (Awad et al 2006b), and glassy carbon (Foller & Kelsall 1993), have been thoroughly investigated and show remarkable performance for ozone production. Nevertheless, they still have some drawbacks such as electrode erosion caused by oxidation reactions and considerably extreme conditions required (Rodríguez-Peña et al 2021a). As an emerging potential candidate, boron doped diamond (BDD) meets the abovementioned requirements well and its inert surface with weak adsorption properties endows the ability to permit the stable presence of OH• and O• which act as precursors for ozone production.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

Ozone water production using a SPE electrolyzer equipped with boron doped diamond electrodes

Deng

Zhao

et al. 2022

Water Supply

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Electrochemical ozone production (EOP) is an attractive technology for disinfection and sterilization purposes. This work reports a study on the EOP performance of the solid polymer electrolyte (SPE) electrolyzer, including the optimization of electrode configuration and operation conditions. It is proven that the EOP performance is highly affected by electrode configuration. Tests using BDDs with different B/C ratios demonstrate that BDD-4.9 provides more reaction sites and faster electron transfer rate, exhibiting a high electrocatalytic activity for EOP. Regarding electrode thickness, 0.54 mm in thickness is the most suitable for the EOP from the perspective of less power consumption. Moreover, operation conditions were evaluated. It is found that increasing water flow rate is an effective strategy for promoting ozone dissolution and within the present experimental range, the water flow rate of 63 L·h−1 is identified. Meanwhile, through the study of all processes occurring inside the electrolyzer at higher current densities, the optimum current density is determined to be 125 mA·cm−2. Based on these results, the ozone water presents an excellent performance in the killing of E. coli with high inoculum concentrations, indicating the potential application performance in the field of environment.

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“…Electrochemical flow reactors have received increased attention in recent years because they are the decisive factor for electrochemical application. , The filter-press electrochemical reactor is frequently employed in an extensive range of electrochemical processes and industrial practices, such as flow batteries, , electrosynthesis, , electrolysers, − electrometallurgy, environmental pollutant treatments, − and so on. The design of an electrochemical reactor must be suitable for the electrochemical application to ensure high space–time yield and low operation cost .…”

Section: Introductionmentioning

confidence: 99%

Modeling and Comparison of Typical Design of Filter-Press Flow Electrochemical Reactors

Wei

2022

Ind. Eng. Chem. Res.

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For scale-up and further development toward commercialization, the influences of flow manifolds on the filterpress electrochemical reactor performance are evaluated by simulations in this study. The simulations are verified by the homemade laboratory-scale reactors. The flow distribution, current distribution, electrode potential distribution, and mass transfer properties inside reactors are presented and discussed particularly. The application of a flow distributor and a turbulence promoter contributes to a homogeneous flow distribution and concentration distribution. Serpentine and parallel manifolds are not favorable for electrolysis performance. The electrolysis performances of these reactors with different flow manifolds are ordered as follows: empty channels with a flow distributor > empty channels with enlarged entrance > empty channels with a flow distributor and turbulence promoter > simple empty channels > serpentine flow > parallel flow.

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New insights about the electrochemical production of ozone

Cited by 43 publications

References 69 publications

Electrochemical Production of Hydrogen Peroxide in Perchloric Acid Supporting Electrolytes for the Synthesis of Chlorine Dioxide

Electrochemical Production of Hydrogen Peroxide in Perchloric Acid Supporting Electrolytes for the Synthesis of Chlorine Dioxide

Ozone water production using a SPE electrolyzer equipped with boron doped diamond electrodes

Modeling and Comparison of Typical Design of Filter-Press Flow Electrochemical Reactors

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