Optimize Combustion Efficiency

Burn low quality heavy fuel oils

Ideal use cases
Reduce emission, increase efficiency, save fuel
What it is and what it does
Perfectly sized water droplets, emulsified in fuel oil
Automated online dosing skid
Reduce ash load, deposits and fouling

Water-in-oil emulsion

Complete carbon burnout

Due to increased usage of low quality fuel oil with high sulphur, asphaltene and vanadium content, power stations all over the world face both environmental and technical problems.
The incomplete combustion of the fuel oil as well as the vanadium and sulphur content cause deposits and corrosions in all parts of the boiler and excessive emissions of solids (particulates) and sulphur trioxide.

Increase net efficiency

Reduce solid emission

Reduce NOx emission

Slow motion video: flame with PentoMuls®

What does PentoMuls® do to my boiler?

PentoMuls® allows the on-line production of a stable water-in-oil emulsion. Firing an emulsion has a great impact on the boiler: Due to the secondary atomization, the fuel oil burns a great deal faster and much more completely. The result is a compact, short flame with a good temperature distribution, therefore much less nitrogen oxide (NOx) and sulphur trioxide (SO3) is generated.

Without water-in-oil emulsion, atomization is insufficient.
The combustion time is too short to burn the oil completely, resulting in unburned carbon leaving the combustion chamber.

With PentoMuls® the secondary atomization cracks down fuel oil particles and allows a complete carbon burn-out within shorter time and a shorter flame.

Reduction Facts

reduce NOx > 20%

reduce solid emissions > 80%

save fuel > 2%

The technology

PentoMuls® is a well balanced blend of surfactants, dispersants and catalysts.
The surfactants allow the creation of a stable, highquality water-in-oil emulsion with water particle sizes in the range of 4 to 6 μm.
Deagglomerating asphaltenes in the emulsion reduces the demand for excess air during combustion and, therefore, results in a corresponding reduction of NOx and SO3 emissions.

To achieve the best possible combustion with heavy fuel oil, water droplets with a size of 4 to 6 μm have to be thoroughly mixed with the oil. If the size of the water droplets is too small, the energy set free during combustion is too small to atomize the fuel oil. On the other hand, water droplets with particle size of more than 10 μm will atomize too slowly which will result in an unbalanced flame.

The emulsification unit is installed on the main fuel oil line.

The emulsification unit is the key item to create the water-in-oil emulsion. It remains property of Pentol and is rented to the power plant.
The emulsification equipment is fitted with a fully automatic control and grants that a constant quality of the water-in-oil emulsion is maintained. Options to operate it remotely from the control room are included in the basic design.

Dosing equipment: water-oil-emulsion unit (smaller version)

What about fireside additives? Are they compatible with PentoMuls®?

Pentol offers a wide range of fireside additives which are compatible with PentoMuls®.
For this reason, the emulsification unit is equipped with dosing equipment for PentoMag. This dosing equipment is controlled by a common CPU and allows the operator to take full control via a common user interface.

PentoMag® fireside additives

Each boiler requires specific treatment to gain optimum results and to maximise savings. For this reason, Pentol offers a full scope of products to meet these needs. Please ask for the separate PentoMag leaflet if you do not have one yet. PentoMag allows to reduce the exit gas temperature below the acid dew point (ADP). It prevents corrosion and deposits in the back end and at the same time eliminates SO3 emission and acid smut fallout. A reduction of the exit gas temperature by 20 ° C corresponds to fuel oil saving of 1 %. The average achievable exit gas temperature ranges between 110 and 120 ° C. Just imagine your savings...

The combined treatment with PentoMuls® and PentoMag® grants both boiler protection and reduction of operating costs.

What results can I expect from firing a PentoMuls® emulsion?

The major benefits of firing PentoMuls® can be
summarised as follows:
Environmental Benefits

  • Reduce solid emission by up to 90 %
  • Reduce NOx emission by up to 30 %
  • Reduce SO3 emission by up to 90 %
  • Reduce CO emission
  • Eliminate acid smut fallout

Economical Benefits

  • Clean fuel system
  • No high and low temperature corrosion
  • No high and low temperature deposits
  • Higher efficiency due to better heat transfer
  • Higher boiler availability
    Efficiency improvement
    (reduce exit gas temperature)

What are the costs?

If you take the increased efficiency and the extended boiler availability into consideration, you will state that the treatment pays for itself.
Ask Pentol for a customised quotation to see a detailed calculation of your savings and find out that environmental protection actually pays off!


Target: Reduce visible SO3 plume.
Both boilers run at full power (400 MWe), one with
and one without combined PentoMag and PentoMuls®

Combustion optimization

Pentol offers complete solutions for combustion optimization consisting of chemicals, dosing equipment and engineering. Our main objective is to help power plants to reduce their emissions and to increase their efficiency.



How to reduce ash load with a complete carbon burnout 

PentoMuls® allows the on-line production of a stable water-in-oil emulsion:  
- get a compact, short flame with a good temperature distribution
- generate much less nitrogen oxide (NOx) and sulphur trioxide (SO3)

Read our brochure PentoMuls®. Learn how the blend of surfactants, dispersants and catalysts works

Would it work for you?

Mohammad Zgheib
Sales Manager

Ready to see it for yourself?

Do you have questions? — We have answers: 
+49 (0)7624 300-0

A prediction of results

can be calculated for different types of boilers and fuel oils.

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