Sustainable fuels
CaviFlow® Cavitation Technology
Cost and
time savings
time savings
Scalability
Ultrafine fluids
Sustainability
Future-proof Solutions for Sustainable Fuels with Cavitation Technology
Efficient emulsion technology for environmentally friendly (bunker) fuel applications
The patented cavitation technology and the CaviFlow® inline modules enable the mixing and homogenization of stable emulsions based on sustainable (bunker) fuels - without any chemical additives. These advanced fuel emulsions reduce consumption, lower emissions and ensure phase consistency for safe storage and transportation.
During a test with an HFO biodiesel blend and CaviFlow® cavitation technology, significant performance improvements were observed:
Sustainable fuels are used successfully in the following fields of application:
During a test with an HFO biodiesel blend and CaviFlow® cavitation technology, significant performance improvements were observed:
- The measured dynamic viscosity at 50 °C decreased by 13.3 %, which improves the flowability of the fuel and contributes to more efficient combustion.
- In addition, the daily fuel requirement was reduced by around 4 %.
- For an MR tanker with a load capacity of around 55,000 DWT, this corresponds to a saving of around 1.2 tons of fuel per day.
Sustainable fuels are used successfully in the following fields of application:
- Use in large maritime engines such as cargo ships and ocean-going tankers
- Compliance with the ISO 8217:2024 standard for marine fuels
- Support for low-emission energy generation solutions
- Contribution to the decarbonization of existing drive systems in industry and logistics
Advantages of RAPTECH emulsions based on sustainable fuels
Results and parameters
RAPTECH Sustainable fuels as a future-oriented emulsion solution
RAPTECH's innovative developments in the field of sustainable fuels are based on a state-of-the-art cavitation process that has been specially designed for the efficient production of low-emission alternative fuels. The technology has been extensively tested on the company's own UADA pilot plant - a unique test platform in Europe - and successfully validated under real-life conditions. By using this process, fuel emulsions can be efficiently produced which, as climate-friendly fuels, meet the requirements for the CO₂-free fuels of the future.
The use of CaviFlow® cavitation technology in an HFO biodiesel blend led to a reduction in viscosity of 13.3% and a reduction in fuel consumption of around 4%. For an MR tanker, this corresponds to a daily saving of around 1.2 tons of fuel.
The use of CaviFlow® cavitation technology in an HFO biodiesel blend led to a reduction in viscosity of 13.3% and a reduction in fuel consumption of around 4%. For an MR tanker, this corresponds to a daily saving of around 1.2 tons of fuel.
| Properties & test methods | HFO 380 | HFO biodiesel |
| Calorific value ( DIN 51900:2023) | 40.598 MJ/kg | 42.396 MJ/kg |
| Density at 15 °C (calculated) | 989.6 kg/m³ | 969.7 kg/m³ |
| Kinematic viscosity at 40 °C (DIN EN ISO 3104:2024) | 600 mm²/s (calculated) | 151.3 mm²/s |
| Sulphur (DIN EN ISO 14596:2007) | 1,78% | 1,35% |
| Flash point (DIN EN ISO 2719:2027) | 122 °C | 160 °C |
| Total residue (ISO 10307-1:2009) | <0.07% | 0,01% |
| Pourpoint (DIN EN ISO 3016:2019) | 0°C | -21°C |
| Parameter | HFO 380 | HFO biodiesel |
| Preheating temperature | 90 °C | 0 °C |
RAPTECH's sustainable fuels are based on state-of-the-art emulsion technology and offer an environmentally friendly alternative to conventional energy sources. Thanks to their specially tailored composition, they enable a reduction in greenhouse gas emissions of up to 25 %. They therefore make an important contribution to a climate-friendly energy supply - especially for use in the maritime industry.
| Parameter | Conventional HFO | VVLSFO | RAPTECH fuel emulsions |
| ISO 8217:2024 Conformity | Yes | Yes |
| Water risk | None | Negligible (≤1%) |
| Greenhouse gas reduction | None | 20-25% |
| Raw material costs | High | Kidney (glycerine/PPO) |
| Engine modifications | None | None |
Saving on fuel costs
Savings on maintenance and lubricants
Energy savings through cleaning agents
Savings in compliance with the CII guidelines
Charter fee
Do you have questions about our innovative emulsions for sustainable fuels?
Our experts from the fields of chemistry and process engineering will provide you with competent and application-oriented advice. We support you in all technical and process engineering issues relating to the use of our sustainable RAPTECH solutions based on sustainable fuels in your plant - individually, practically and in a targeted manner.
-100%
Addition of
additives
additives
-25%
Reduction
of emissions
of emissions
Efficient emulsion technology for sustainable fuels in maritime and industrial applications
- The RAPTECH CaviFlow® modules use targeted hydrodynamic cavitation to produce stable emulsions based on sustainable fuels. Components that are difficult to mix, such as heavy fuel oil, biodiesel and optionally water, are homogenized to create a finely dispersed fuel mixture. These emulsions are characterized by high stability, efficiency and long shelf life.
Thanks to the flexibly adjustable mixing ratio, sustainable, alternative fuels can be optimally adapted to the respective operating conditions. The process enables consumption-reduced, clean combustion and makes green fuels an economically and ecologically convincing alternative for energy supply.
The emulsions based on renewable energies produced in this way are particularly suitable for applications as sustainable marine fuels and in industrial energy systems.
RAPTECH cavitation technology is suitable for the production of CO₂-neutral fuels, as required for the reduction of CO₂ emissions in shipping and industry, as well as for the use of energy from renewable raw materials such as biofuels:
- Emulsions with heavy fuel oil (HFO)
- Combinations of HSFO, VLFO and ULSFO
- Biodiesel as a renewable energy source
- Bioethanol for industrial use
- Pyrolysis oil from recycled plastics (WPPO)
- Hydrogenated vegetable oil (HVO)
- Glycerine-based fuel solutions
- Water-in-fuel emulsion systems
- Qualitative upgrading of heavy fuels
- Cavitation-based fuel reforming
- Optimization of atomization properties
- Demand-oriented use of additives
Conformity with ISO 8217:2014
(Specification for bunker fuels)
(Specification for bunker fuels)
CaviFlow® modules
Efficient emulsification of sustainable fuels with CaviFlow® inline technology
The CaviFlow® inline modules from RAPTECH have been specially developed for the energy-efficient processing of sustainable fuels. These compact plug & play systems enable the direct integration of state-of-the-art cavitation technology into existing fuel infrastructures - ideally suited for the production and optimization of emulsions based on fossil and biogenic sustainable fuels.
Thanks to standardized thread and flange connections, the CaviFlow® modules can be seamlessly integrated into existing systems without any structural changes. They are immediately ready for operation, low-maintenance thanks to a sophisticated easy-to-clean design and impress with their high efficiency and flexible scalability from 6 m³/h to 100 m³/h.
All modules are fully compatible with common PLC systems and enable seamless process monitoring with real-time data transmission. This ensures maximum transparency, high operational reliability and precise control - even under demanding conditions when using sustainable fuels.
Thanks to standardized thread and flange connections, the CaviFlow® modules can be seamlessly integrated into existing systems without any structural changes. They are immediately ready for operation, low-maintenance thanks to a sophisticated easy-to-clean design and impress with their high efficiency and flexible scalability from 6 m³/h to 100 m³/h.
- Plug & play solution
- Immediate use
- Low-maintenance technology
- Low investment costs
- Scalable flow rates
- 6 m³/h to 100 m³/h
All modules are fully compatible with common PLC systems and enable seamless process monitoring with real-time data transmission. This ensures maximum transparency, high operational reliability and precise control - even under demanding conditions when using sustainable fuels.
Technological and innovative advantages of sustainable fuels
Lower emissions thanks to sustainable fuels with full ISO 8217 conformity
Optimized combustion of sustainable fuels through finely dispersed emulsions
RAPTECH's innovative CaviFlow® cavitation technology enables the efficient homogenization of sustainable fuels, even with challenging components such as heavy fuel oil or biogenic blends. By creating ultra-fine emulsions, the droplet size of sustainable fuels is significantly reduced, resulting in clean, even combustion with increased energy yield.
Thanks to this fine microstructure, emissions such as SOₓ, NOₓ and CO₂ can be significantly reduced. At the same time, the technology meets all the requirements of ISO 8217:2024 and is therefore fully compliant with the current standards for maritime fuels.
RAPTECH is thus creating the basis for the industrial use of sustainable fuels - efficient, future-proof and environmentally friendly - both in shipping and in stationary energy systems.
- A 25% reduction in emissions can be observed
Thanks to this fine microstructure, emissions such as SOₓ, NOₓ and CO₂ can be significantly reduced. At the same time, the technology meets all the requirements of ISO 8217:2024 and is therefore fully compliant with the current standards for maritime fuels.
RAPTECH is thus creating the basis for the industrial use of sustainable fuels - efficient, future-proof and environmentally friendly - both in shipping and in stationary energy systems.
Converting to sustainable fuels with CaviFlow®
Increase the efficiency and environmental compatibility of your system: CaviFlow® inline mixers bring state-of-the-art cavitation technology directly into your existing fuel system - ready to connect, low-maintenance and flexibly scalable. Perfectly suited for the emulsification of sustainable fuels, without any costly conversion work.
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Sustainable fuels
Frequently asked questions on the topic: Sustainable fuels
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