Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8948229 | International Journal of Hydrogen Energy | 2018 | 8 Pages |
Abstract
In this study, the effect of pulse potential on alkaline water electrolysis energy consumption is investigated. A specially designed electrical circuit is used to observe the effect of different duty cycles and frequency values on water electrolysis energy consumption in different concentration values of alkaline solution. The results show that using pulse potential enhances the mass transport of oxygen and hydrogen bubbles due to the pumping effect. This provides less contact with oxygen bubbles to improve corrosion resistance of anode electrodes. Moreover, decreasing mass transfer losses on the electrode surface resulted in a 20-25% lower energy consumption to produce 1Â mol of hydrogen in the cell. The optimum frequency for 10% and 50% duty cycle and 10% and 15% concentration are investigated. For 10% duty cycle, the optimum frequency is specified around 140-200Â kHz and for 50% duty cycle, it is around 380-400Â kHz for all concentration values.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Nesrin Demir, Mehmet Fatih Kaya, M. Salahaldin Albawabiji,