Effect of pulse potential on alkaline water electrolysis performance

Simultaneous Removal of Nitrogen and Refractory Organics from a Biologically Treated Leachate by Pulse Electrochemical Oxidation in a Multi-channel Flow Reactor

“…These results may be because the instantaneous current of MP–EO is several times or even dozens of times higher than that of the traditional DC–EO process, and more active chlorine (Cl 2 /OCl – ) could be produced, leading to a much higher degradation rate and efficiency of COD and TN. ,, Second, the oxidants and other intermediate products, produced on the electrodes by MP–EO, could be better to be mass transferred into other parts of the BTL when the pulse transmitted off during the t off times . At the same time, raw material Cl – of the EO process could also be transferred into the surface of the electrodes, resulting in the elimination of concentration polarization and benefits to the next pulse electrolysis cycles .…”

“…Due to the up-mentioned advantages, many EO and coupling EO processes of electro-flocculation, − electro-Fenton, , direct and indirect EO, − electrochemical reduction, − ion-exchange membrane electrochemistry, − three-dimensional electrode system, − and electrochemical integration process − were applied for the treatment of MSW leachate. However, oxidation films are often formed on the anodes, which results in fouling of the electrodes and seriously hinders the degradation of organic pollutants on the metal anodes during the traditional EO treatment process with direct-current (DC–EO). However, the formation of oxidation films and fouling of electrodes, anodes loss, and energy consumption are significantly reduced when the pulse power supply is applied to the EO process (PS–EO) .…”

“…Unlike the continuous electrolysis of DC–EO, the PS–EO process is characterized as existing pulse intervals with pulse-on time ( t on ) and pulse-off time ( t off ) . The sum of t on and t off is the pulse period ( T ), and the reciprocal of T is defined as pulse frequency ( f P ).…”

“…38 Unlike the continuous electrolysis of DC−EO, the PS−EO process is characterized as existing pulse intervals with pulse-on time (t on ) and pulse-off time (t off ). 36 The sum of t on and t off is the pulse period (T), and the reciprocal of T is defined as pulse frequency (f P ). Therefore, duty ratio (R D ) is the ratio of t on to T, which is an important parameter that is often adjusted to achieve an energy-saving effect.…”

Pulsed-Supplied Water Electrolysis via Two-Switch Converter for PV Capacity Firming

“…This stems from power reduction regarding the auxiliary losses of power conditioning system. Thanks to the pulse voltage, electrochemical reactions become slower and relaxed bubbles on the electrode surface favors the separation of oxygen and hydrogen resulting in higher flow amounts with the same energy consumption [35]. Although a wide variety of different DC/DC topologies can be used, transistor-based power supplies offer 10% greater efficiencies compared to thyristor-based alternatives [36].…”