Industrial oxyhydrogen case studies and field observations
Short answer: Our industrial work uses PEM/SPE pure-water electrolysis with no potassium hydroxide electrolyte, applied to internal combustion engines and industrial combustion equipment. Results below are labelled as audited results, field observations or technical analysis, and no universal fuel-saving figure is claimed.
Last reviewed: August 2026 · Combustion Enhancement technical review
This page is part of our oxyhydrogen evidence cluster. Published figures are attributed to the paper reporting them, manufacturer figures are labelled as manufacturer claims, and our own interpretation is labelled as our technical analysis. See the 2026 Scientific Reports HHO study review.
Terminology used on this page
| Term | Definition |
|---|---|
| H₂ | Hydrogen. |
| O₂ | Oxygen. |
| H₂/O₂ | A hydrogen and oxygen mixture. |
| HHO / oxyhydrogen | Commonly used terminology for an electrolytically generated hydrogen/oxygen mixture delivered to an engine intake. |
| PEM / SPE | Proton exchange membrane / solid polymer electrolyte electrolysis — a solid-membrane, pure-water architecture with no liquid caustic electrolyte. |
| Alkaline KOH electrolysis | Electrolysis using a liquid potassium hydroxide electrolyte. |
| BSFC | Brake specific fuel consumption — fuel consumed per unit of engine work. |
| BTE | Brake thermal efficiency — the share of fuel energy converted to useful engine work. |
What our systems are
Our technical analysis: our systems are PEM/SPE membrane electrolysers fed with purified water, sized by engine displacement or burner duty, delivering oxyhydrogen into the intake or combustion air path.
There is no liquid caustic electrolyte in the cell, and no hydrogen is stored on board — gas is generated on demand while the equipment is running.
- —PEM/SPE membrane cell, purified-water feed, no KOH
- —No onboard hydrogen storage; generation on demand
- —Sized by engine displacement or burner duty
- —Applied to fleet engines, gensets, marine engines and industrial combustion equipment
Audited beverage-plant trial (Coca-Cola India)
Our audited results: an oxyhydrogen installation at a Coca-Cola bottling operation in India was evaluated with third-party audit of the specific fuel ratio before and after installation.
We describe this as an audited trial rather than publishing a headline percentage here, because the underlying audit documentation and measurement conditions belong with the figures. Operators evaluating the technology can request the audit scope, measurement method and reported specific-fuel-ratio change directly from us.
We do not present this single site as evidence of what any other plant, engine or duty cycle will do.
Industrial furnace and burner trials
Our field observations: oxyhydrogen has been trialled on industrial furnace and burner equipment, where the relevant measurements are burner fuel input, flame behaviour, stack emissions and product throughput.
These are described here in general terms only. Where a site trial has not produced audited, method-documented measurements, we do not publish numbers for it.
Engine-specific applications
Our field observations: engine applications span line-haul and mining fleets, generator sets, marine engines and agricultural equipment, with sizing selected by displacement and duty cycle.
Operators evaluating any of these applications should run a controlled baseline on their own equipment before making a commercial projection. That protocol is set out in our measurement standard.
Our industrial oxyhydrogen work
Our technical analysis: Combustion Enhancement supplies PEM/SPE oxyhydrogen systems that electrolyse purified water across a solid proton-exchange membrane. There is no potassium hydroxide electrolyte in the cell and no onboard hydrogen storage — gas is generated on demand while the equipment runs. Systems are applied to internal combustion engines (fleet, mining, marine, generator sets, agriculture) and to industrial combustion equipment.
Our audited results: an installation at a Coca-Cola bottling operation in India was evaluated with third-party audit of the specific fuel ratio before and after installation; audit scope and measurement method are provided on request. Our field observations: furnace, burner and engine trials are described in general terms only, and we do not publish figures where a documented measurement method is not available.
No projected, typical or expected fuel-saving figure is published. Actual results vary materially with engine condition, duty cycle, load profile, fuel quality, installation and operating conditions. A controlled field evaluation on your own equipment, with baseline data captured before installation, is required before any commercial projection.
Read our industrial oxyhydrogen case studies and field observationsQuestions.
What technology do your industrial systems use?
- PEM/SPE membrane electrolysis with a purified-water feed and no potassium hydroxide electrolyte, generating oxyhydrogen on demand with no onboard hydrogen storage.
What was audited at the Coca-Cola India installation?
- The specific fuel ratio before and after installation was evaluated with third-party audit. We provide the audit scope, measurement method and reported change on request rather than publishing a headline percentage.
Do you claim a fuel-saving percentage for industrial installations?
- No. Outcomes depend on equipment, duty cycle and baseline condition, so we ask operators to measure a controlled baseline on their own equipment.
Sources
- Synák, F. (2026). Evaluation of hydrogen and oxygen mixture addition in internal combustion engines under real driving conditions. Scientific Reports.DOI 10.1038/s41598-026-54105-y · also at nature.com
- Read the original 2026 Scientific Reports HHO study on nature.com
- Effect of regulated harmful matters from a heavy-duty diesel engine by H₂/O₂ addition to the combustion chamber, Fuel (2012)
- Hydrogen addition to compression-ignition engines — review, Renewable and Sustainable Energy Reviews (2016)
PEM/SPE oxyhydrogen systems
Unlike the HG80 alkaline system tested in the 2026 Scientific Reports experiment, PEM/SPE oxyhydrogen systems such as the HydroHub™ use solid-polymer electrolysis and pure water, with no 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.
Related evidence pages
- Alkaline HHO versus PEM/SPE oxyhydrogen
How liquid-electrolyte alkaline KOH HHO generators differ from PEM/SPE pure-water oxyhydrogen systems, and why a test of one is not a test of the other.
- How to test PEM oxyhydrogen properly
The measurement set required to evaluate PEM/SPE oxyhydrogen on an engine: gas composition, purity, flow, electrical input, load, fuel consumption, emissions, dosing, repeats and uncertainty.
- Does HHO work? A source-bounded technical analysis
A source-bounded answer to whether HHO improves engine fuel economy: what published testing supports, what it does not, and which variables decide the outcome in any given installation.