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Examining oxyhydrogen gas generation experimentally using wet cell design.

M S Gad¹, A K El Soly², Subhav Singh^3,4

¹Mechanical Engineering Department, Faculty of Engineering, Fayoum university, Fayoum, Egypt.

|June 3, 2025

Summary

This study developed an efficient HHO wet cell electrolyzer using readily available materials. The optimized wet cell design significantly enhances oxyhydrogen (HHO) gas production rates and efficiency compared to dry cells.

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Area of Science:

Renewable Energy Sources
Electrochemistry
Chemical Engineering

Background:

Oxyhydrogen (HHO) gas, produced via water electrolysis, is a promising energy source due to its combustion benefits.
Dry cell electrolyzers are common, but optimizing HHO gas flow rate and efficiency remains a key challenge.

Purpose of the Study:

To design and evaluate an HHO wet cell electrolyzer for maximized gas flow rate and improved efficiency.
To investigate the impact of various parameters on HHO generation using cost-effective materials.

Main Methods:

Constructed an HHO wet cell using stainless steel 316L electrodes (136.5 cm² surface area, 4 mm plate gap).
Tested various concentrations of KOH and NaOH electrolytes.
Analyzed the influence of electrolyte concentration, operation time, cell configuration, current, temperature, and voltage on HHO production.

Main Results:

HHO generation rate increased with higher voltage, electrolyte temperature, electrolyte concentration, and applied current.
At 90 minutes, peak output reached 1375 ml/min with 20 g/L NaOH and 27 A.
Achieved 69.3% production efficiency, generating 1160 ml/min at 18 A with 10 g/L NaOH.

Conclusions:

The HHO wet cell design offers superior gas production and efficiency compared to dry cells.
Optimizing electrolyte concentration and operational parameters is crucial for maximizing HHO output.
Overheating in wet cell electrolyzers due to high current is a potential drawback for practical applications.