Use of electrolysis under pressure for destructive oxidation of phenol and azo dyes

Kharlamova, T.; Aliev, Z. M.

doi:10.1134/s102319351603006x

Cited by 7 publications

(6 citation statements)

References 19 publications

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“…Water electrolysis is defined as a process of splitting water into oxygen and hydrogen gas due to the passage of a direct electric current (DC) [58][59][60]. Renewable (green) hydrogen can be produced by utilising RE resources via a water electrolysis pathway [58][59][60].…”

Section: Water Electrolysismentioning

confidence: 99%

Stand-Alone Microgrid with 100% Renewable Energy: A Case Study with Hybrid Solar PV-Battery-Hydrogen

2020

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A 100% renewable energy-based stand-alone microgrid system can be developed by robust energy storage systems to stabilize the variable and intermittent renewable energy resources. Hydrogen as an energy carrier and energy storage medium has gained enormous interest globally in recent years. Its use in stand-alone or off-grid microgrids for both the urban and rural communities has commenced recently in some locations. Therefore, this research evaluates the techno-economic feasibility of renewable energy-based systems using hydrogen as energy storage for a stand-alone/off-grid microgrid. Three case scenarios in a microgrid environment were identified and investigated in order to select an optimum solution for a remote community by considering the energy balance and techno-economic optimization. The "HOMER Pro" energy modelling and simulating software was used to compare the energy balance, economics and environmental impact amongst the proposed scenarios. The simulation results showed that the hydrogen-battery hybrid energy storage system is the most cost-effective scenario, though all developed scenarios are technically possible and economically comparable in the long run, while each has different merits and challenges. It has been shown that the proposed hybrid energy systems have significant potentialities in electrifying remote communities with low energy generation costs, as well as a contribution to the reduction of their carbon footprint and to ameliorating the energy crisis to achieve a sustainable future.A modern microgrid is an integrated energy system consisting of localised grouping of distributed electricity generation with storage and multiple electrical loads [11,12]. It can be controlled as one entity or grid, either standalone, completely separate from, or connected to, the existing utility grid [13]. The development of the microgrid has been largely dominated by energy demand-side management, RE penetration and its integration into the utility grid [14,15]. In cases where it is not possible to connect the microgrid to the utility grid for any reason such as the remote or isolated location, a stand-alone microgrid (SAM) is an answer to the power supply challenges [16]. The authors of this research envisioned that the SAM is a good starting point to transit from the classic trend of fossil-fuelled powered systems to 100% RE powered systems.The SAM is a low-voltage power system that supplies a specific localised area [17]. It comprises local power generation systems with load demands, that can operate in islanded mode or off-grid [18,19].In the transition to a 100% RE SAM system, hybrid distributed (decentralized) or centralized energy generation and storage systems are used to meet the energy need [18]. The SAM is presented as a viable and effective solution to the utilisation of renewable energy resources (RER), by minimizing the problems associated with variability and intermittency of the renewables [16]. The main challenge in a SAM system is the optimal sizing of the system components to make the...

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Section: Water Electrolysismentioning

confidence: 99%

Stand-Alone Microgrid with 100% Renewable Energy: A Case Study with Hybrid Solar PV-Battery-Hydrogen

2020

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“…It is then followed by the degradation of benzene ring in the dye molecule to finally undergo complete or partial mineralization process. These effects could be visualized by absorbance changes within the UV-VIS spectrum for the selected wavelength ranges, namely: 350–600, 265–350 and 200–265 nm, correspondingly [ 46 , 47 , 48 , 49 , 50 , 51 ].…”

Section: Resultsmentioning

confidence: 99%

“…It is strongly believed that the latter effect is a consequence of accumulation of the reaction intermediates from the first electrodegradation stage in bulk of the analyzed solution. Last, pigments electrodegradation process ( Figure 7 c and Figure 8 c) is related to mineralization, where a vast number of relatively simple (e.g., maleic, formic and acetic acid, aldehydes, ammonia, nitrogen oxides and finally carbon dioxide molecule) or more complex chemical compounds could be formed, such as: anti-pentanoic acid and others [ 48 , 49 , 50 , 51 ]. It has to be stated that for the Disperse Red 167, its removal involved a combination of two steps, namely: surface electrooxidation and electrocoagulation processes, yielding 98 and 99% of the dye removal after 900 and 3600 s, respectively ( Figure 7 d).…”

Section: Resultsmentioning

confidence: 99%

Electrochemical Degradation of Industrial Dyes in Wastewater through the Dissolution of Aluminum Sacrificial Anode of Cu/Al Macro-Corrosion Galvanic Cell

et al. 2020

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This paper reports on the process of industrial-type wastewater purification carried-out through continuous anodic dissolution of aluminum alloy sacrificial anode for artificially aerated Cu-Al alloy galvanic (macro-corrosion) cells and synthetically prepared wastewater solutions. Electrochemical experiments were performed by means of a laboratory size electrolyzer unit, where the electrocoagulation process along with surface-induced electrooxidation phenomena were examined for wastewater containing Acid Mixture and Disperse Red 167 dyes. Final reduction of the dyes concentrations came to 32 and 99% for Acid Mixture and Disperse Red 167, correspondingly. The above was visualized through the employment of electrochemical (cyclic voltammetry and a.c. impedance spectroscopy techniques) and instrumental spectroscopy analyses.

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“…В ячейке с неразделенным пространством электрогенерированный Н 2 О 2 может быть окислен на аноде по реакциям (5,6), давая в качестве интермедиата радикал НО 2 ▪ с меньшей окислительной способностью, чем НО ▪ :…”

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“…Ключевые слова: непрямое электрокаталитическое окисление, активные формы кислорода, резорцин, мезоструктурированный углерод, газодиффузионный электрод, интермедиаты. , содержащих различные органические и неорганические поллютанты, очистки и дезинфекции питьевой воды, рекультивации загрязненных почв [2,[6][7][8][9][10][11]. Для запорного слоя использовали ацетиленовую сажу марки А-437 Э, для рабочего слоя -мезоструктурированный углерод СМК-3.…”

unclassified

Electrocatalytic Resorcinol Oxidation by Active Oxygen forms in Situ Generated in Conjugate Reactions on Pt and Pb/PbO₂ Anodes and Mesostructured Carbon Cathode СМК‑3

Kornienko

Кенова

Kornienko

et al. 2021

Journal of Siberian Federal University. Chemistry

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Kinetics and selectivity of indirect electrocatalytic resorcinol oxidation by active oxygen forms (AOF) in situ generated from oxygen in gas diffusion electrode (GDE) mesostructured carbon CMK‑3 and Pt, Pb/PbO2 at different pH were studied. The high resorcinol oxidation process effectivity in both Pt-GDE at pH=10 (99 %) and Pb/PbO2 + Fe2+ at рН=2 (99 %) systems was shown; the resorcinol oxidation scheme was proposed

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Use of electrolysis under pressure for destructive oxidation of phenol and azo dyes

Cited by 7 publications

References 19 publications

Stand-Alone Microgrid with 100% Renewable Energy: A Case Study with Hybrid Solar PV-Battery-Hydrogen

Stand-Alone Microgrid with 100% Renewable Energy: A Case Study with Hybrid Solar PV-Battery-Hydrogen

Electrochemical Degradation of Industrial Dyes in Wastewater through the Dissolution of Aluminum Sacrificial Anode of Cu/Al Macro-Corrosion Galvanic Cell

Electrocatalytic Resorcinol Oxidation by Active Oxygen forms in Situ Generated in Conjugate Reactions on Pt and Pb/PbO₂ Anodes and Mesostructured Carbon Cathode СМК‑3

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