Hydrogen Water Production — Equipment and Process
Hydrogen water is produced by generating hydrogen from purified water in a PEM/SPE cell and dissolving that hydrogen into the water volume. Output is characterised by achievable dissolved hydrogen concentration, cycle time, feed-water requirement and consumable service interval.
Three key industrial facts
- Hydrogen is generated from the water itself; production and dissolution occur in the same water circuit.
- Achievable concentration depends on cell area, current, contact time, temperature and pressure.
- Dissolved hydrogen decays after production, so concentration is quoted with a measurement time.
Process stages
A production system has four functional stages: feed-water treatment, electrolysis, gas–liquid contact (dissolution), and separation or venting of the co-produced oxygen stream. Bottle formats compress these stages into one vessel; bench machines separate them, which allows higher and more repeatable dissolved concentrations.
- Treatment: filtration and deionisation to the cell's feed specification.
- Electrolysis: PEM/SPE stack splits water into hydrogen and oxygen.
- Dissolution: contact time and pressure govern how much hydrogen enters solution.
- Separation: oxygen is separated at the membrane and vented rather than dissolved.
Bottles versus machines
Portable bottles are convenient and self-contained but constrained by cell area and short contact time. Bench machines carry a larger stack and a dedicated dissolution stage, so they reach higher concentrations and are easier to characterise, at the cost of size, power and plumbing.
| Format | Characteristics |
|---|---|
| Portable bottle | Integrated cell, short cycle, lower achievable concentration |
| Bench machine | Larger stack and dissolution stage, higher achievable concentration |
| Plumbed system | Continuous feed-water treatment, output characterised at a tap point |
Dissolved hydrogen stability
Hydrogen is only sparingly soluble in water and escapes readily. Concentration falls with time, agitation, elevated temperature and exposure to headspace. Any quoted concentration therefore needs a stated time and container condition to be meaningful, and comparisons made without that information are not valid.
Scope of statements
This page is neutral reference material describing what dissolved-hydrogen water is, how it is produced and how purity is specified. It makes no medical, health, wellness, performance, emissions or fuel-saving claim, and it is not a determination of suitability for any application.
Research and administrator references
- The Combustion Institute — Combustion research body
- Combustion and Flame (Elsevier) — Peer-reviewed combustion science
- International Journal of Hydrogen Energy — Hydrogen combustion literature
- US DOE Hydrogen and Fuel Cell Technologies Office — Hydrogen research programme
- Clean Energy Regulator — ACCU Scheme — Australian carbon credit administration
PEM/SPE oxyhydrogen systems
Systems referenced across this cluster are PEM/SPE units that electrolyse purified water, rather than alkaline retrofit devices circulating a potassium hydroxide electrolyte.
Combustion Enhancement develops PEM/SPE oxyhydrogen systems using pure-water electrolysis (no KOH). These systems are used in industrial engines, furnaces and commercial applications. Learn more about the HydroHub™ PEM oxyhydrogen system and the DH-Power™ industrial oxyhydrogen generator.
Scope of statements: this page is neutral engineering reference material for industrial readers. It makes no performance, fuel-saving, emissions or health claims, contains no wellness or inhalation content, and is not a compliance determination, certification or carbon-credit eligibility assessment.
Frequently asked questions.
How is hydrogen water produced?
- By electrolysing purified water in a PEM/SPE cell and dissolving the resulting hydrogen into the water volume, with the co-produced oxygen separated at the membrane.
Why do machines reach higher concentrations than bottles?
- They carry a larger cell and a dedicated dissolution stage, giving greater contact time and better control of pressure and temperature.
Why does concentration fall after production?
- Hydrogen has low solubility in water and escapes to the headspace, so concentration decays with time, agitation and temperature.
What makes a stated concentration comparable?
- A stated measurement method, measurement time after production and container condition. Without those, figures from different products are not comparable.
- Hydrogen Combustion — Industrial Engineering Hub
- Boiler & Furnace Hydrogen Enhancement — Engineering Hub
- PEM Industrial Hydrogen Purity — Engineering Hub
- Combustion Science — Oxidative Mechanisms and Hydrogen Addition
- Hydrogen Water — Industrial Engineering Reference
- Combustion Enhancement Overview
- Industrial Combustion Map
- Hydrogen water industrial purity
- Hydrogen water industrial FAQ
- Hydrogen water industrial basics
- Hydrogen water studies — evidence review