Enhancing alkaline water electrolysis through innovative approaches and parametric study

Abdelrahman S. Emam, Mohammad O. Hamdan, Bassam A. Abu-Nabah, Emad Elnajjar

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The objective of this study is to examine how different parameters impact the effectiveness of alkaline water electrolysis (AWE) in producing hydrogen. Multiple experimental innovative approaches have been examined, namely, mechanically induced electrolyte flow, induction heating of electrodes, and pulsating voltage power mode. In addition, multiple parameters that have been experimentally investigated, including concentration of potassium hydroxide (KOH) solution, input current density, electrode spacing, electrode thickness, cell temperature, electrode coating material, and electrode morphology. The results obtained from these tests show significant improvements in AWE performance and efficiency. A better understanding of the behavior of AWE and the factors that influence its performance has been presented through a detailed discussion of the experimental results. The results have shown that reducing the gap size between electrodes improves AWE efficiency, however this relation is not monotonic and after a critical gap size the performance starts deteriorating. Furthermore, the localized induction heating has shown an improvement in the overall efficiency by approximately 8 % accompanied by a marginal increase in the global system temperature of around 4.2 °C.

Original languageEnglish
Pages (from-to)1161-1173
Number of pages13
JournalInternational Journal of Hydrogen Energy
Volume55
DOIs
Publication statusPublished - Feb 15 2024

Keywords

  • Alkaline water electrolysis (AWE)
  • Electrode coating
  • Electrode spacing and surface roughness
  • Electrolyte flow
  • Green hydrogen
  • Induction heating

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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