A note on a design protocol for deoxygenation of water

Zekos, Iasonas; Stack, Margaret

doi:10.1016/j.elecom.2019.04.009

Cited by 15 publications

(9 citation statements)

References 15 publications

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“…Both DO in the solution and oxygen in the air may increase the content of HPO 3 2– during the production of H 3 PO 2 by BMED. To find an efficient way to remove the DO, several pretreatment methods, such as nitrogen aeration, ultrasound, and vacuum filtration, were used to remove the DO before starting up.…”

Section: Resultsmentioning

confidence: 99%

“…Both DO in the solution and oxygen in the air may increase the content of HPO 3 2− during the production of H 3 PO 2 by BMED. To find an efficient way to remove the DO, several pretreatment methods, such as nitrogen aeration, 19 ultrasound, 33 and vacuum filtration, 30 were used to remove the DO before starting up. Figure 5 illustrates the DO content in deionized water after pretreatment and the concentration of HPO 3 2− after dissolving NaH 2 PO 2 .…”

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

“…Therefore, reducing the initial DO content in the solution and the contact between the solution and air is the key to improve the H 3 PO 2 purity. The DO content in the solution can be decreased by several physical methods such as nitrogen aeration, thermal degassing, desorption, and vacuum degassing …”

Section: Introductionmentioning

confidence: 99%

“…The DO content in the solution can be decreased by several physical methods such as nitrogen aeration, thermal degassing, desorption, and vacuum degassing. 19 In this study, a BMED device with three-compartment configuration was used to treat NaH 2 PO 2 solution and prepare H 3 PO 2 . The effects of the current density, concentration of NaH 2 PO 2 , and initial concentration of NaOH on the H 3 PO 2 production efficiency by BMED in terms of the voltage drop, unit energy consumption, current efficiency, and sodium ion content in the acid chamber were investigated.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of Hypophosphorous Acid by Bipolar Membrane Electrodialysis: Process Optimization and Phosphorous Acid Minimization

Yan

Hang

Liu

et al. 2019

Ind. Eng. Chem. Res.

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Hypophosphorous acid (H3PO2) is an important chemical product with wide applications in pharmaceuticals and electroless plating. In this study, bipolar membrane electrodialysis (BMED) was used to produce H3PO2 from sodium hypophosphite salt (NaH2PO2) to replace the traditional preparation methods. The BMED process was optimized in terms of current density, NaH2PO2 salt concentration, and initial NaOH concentration of the base solution. The results indicated that low Na+ leakage occurred at lower salt concentrations. Under the optimum conditions, such a BMED system obtained a high concentration of H3PO2, a low Na+ content, and a low energy consumption, equaling to 1.03 mol/L, 670 ppm, and 1.18 kW h/kg, respectively. To minimize the amount of phosphorous acid (H3PO3) generated from H3PO2 oxidation during the BMED process, a nitrogen aeration operation was applied in both the acid and salt chambers, decreasing the HPO3 2– content to 251 ppm, which was 44.1% lower than that without a dissolved oxygen content control strategy. The newly produced H3PO3 during the BMED process was reduced by 96.5%. The obtained results indicated that the BMED process has great potential for application in the production of high-quality H3PO2 from NaH2PO2 in industry.

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Section: Resultsmentioning

confidence: 99%

Section: Industrial and Engineering Chemistry Researchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Preparation of Hypophosphorous Acid by Bipolar Membrane Electrodialysis: Process Optimization and Phosphorous Acid Minimization

Yan

Hang

Liu

et al. 2019

Ind. Eng. Chem. Res.

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“…Studies have been conducted by Nesic and Lee which looked at the role of pH, temperature, CO 2 partial pressure and the concentration of F 2+ ions in the corrosion behaviour of mild steel [12]. This paper will look to expand the understanding of the role of environmental modification by studying the effects of salinity changes on corrosion behaviour in terms of corrosion rate and FeCO 3 layer properties.…”

Section: Introductionmentioning

confidence: 99%

On the Effect of Pre-formed Scales in Mitigating Corrosion of Steels in CO2 Environments

2020

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Chromium (Cr) containing steels were tested to analyse corrosion behaviour in carbon dioxide saturated water of varying salinities with extended exposure time. Both potentiodynamic and mass loss data were collected to gain a better understanding of the corrosion mechanisms. It was found that both the high Cr steels displayed degradation in the form of pitting with increasing salinities. However, the low alloy steel reference material showed uniform iron carbonate (FeCO 3) precipitation. The use of high salinity precipitated layers to aid corrosion protection in lower salinity seawater environments was then established as an interesting area for greater examination. Subsequently, samples of the low alloy steel previously corroded in solutions of 7, 14 and 28% sodium chloride (NaCl) concentration were then tested in seawater salinities of 3.5% NaCl. It was found that both the 7 and 14% NaCl pre-corroded samples resulted in a significant reduction in the corrosion rate when compared with non-pre-corroded samples. The 7% NaCl pre-corroded sample showed the greatest reduction in corrosion rate, and through SEM analysis of the layer both on the surface and cross-section it was found to display an iron carbonate layer more densely packed and defect free. This indicated the potential benefits of high salinity pre-corrosion techniques to aid protection in seawater environments.

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Deep deoxidation of water in a miniaturized annular rotating device: Experimental investigation and machine learning modeling

Wang,

Chang,

Shang

et al. 2024

Chemical Engineering Journal

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A note on a design protocol for deoxygenation of water

Cited by 15 publications

References 15 publications

Preparation of Hypophosphorous Acid by Bipolar Membrane Electrodialysis: Process Optimization and Phosphorous Acid Minimization

Preparation of Hypophosphorous Acid by Bipolar Membrane Electrodialysis: Process Optimization and Phosphorous Acid Minimization

On the Effect of Pre-formed Scales in Mitigating Corrosion of Steels in CO2 Environments

Deep deoxidation of water in a miniaturized annular rotating device: Experimental investigation and machine learning modeling

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