PentoMuls | Water-in-Oil Technology for HFO Boilers
For complete carbon burnout and increased efficiency


Simply explained

What, How & Why?

PentoMuls emulsifies water and heavy fuel oil.

The emulsion burns much more completely

than fuel oil alone, especially when burning low-quality oil.

No more black smoke on your chimney!

PentoMuls combustion eliminates unburned carbon immediately and completely.

Eliminating the blacksmoke

allows you to reduce excess air and increase efficiency.

Pentol offers a full service

Consultation and engineering assistance

Dosing equipment installation

PentoMuls supply

Emissions testing and combustion optimization

Intro   »   Challenge   »   Pentol   »   Plan   »   Improvement   »   Action   »   Promise

PentoMuls® is the best available water-in-oil emulsion technology for heavy fuel-fired boilers

PentoMuls Dosing
PentoMuls water-in-oil emulsion technology allows online production of a stable water-in-oil emulsion to increase combustion efficiency and reduce emissions.

Firing emulsions in boilers has been researched intensively for many decades. Pentol successfully commercialized this technology in 1997.

PentoMuls® mechanically and chemically stabilizes fuel oil to emulsify it with water.

Pentol’s extensive testing of PentoMuls has proven that it reduces fuel oil emissions

Read the following pages to learn more.

Action principle

Reduce total solid emission by 60 – 80%!

Typically 60-80% of the ash emitted in a power plant consists of unburned carbon. We like to call this “wasted energy”. PentoMuls makes it possible to reduce unburned carbon emission by up to 90%. This results in a minimum of 50% less total ash being forced through superheaters, economizers and the air heater. This ash usually creates deposits that clog the heat exchanger surfaces. PentoMuls fuel oil treatment provides many advantages, from cleaning the fuel oil heaters and injection nozzles to increasing runtime with full load.

PentoMag®, Pentol’s Magnesium technology, increases the melting point of vanadium, sodium and potassium, so that these fuel components are actively suppressed. PentoMag neutralizes all condensing SO3, which reduces the exit gas temperature and increases efficiency by up to 2%. Any residuals remaining in the boiler will be water soluble and easy to remove during outages.


To guarantee the long-term stability of the emulsion, Pentol uses a combined mechanical and chemical stabilization of the fuel.

PentoMuls® is a well-balanced blend of surfactants, dispersants and catalysts. PentoMuls cleans the fuel oil system by removing buildup and preventing deposits in fuel oil heaters, corners and valves. It also emulsifies and stabilizes water content. Tests have shown that heavy fuel emulsions remain stable for up to six months without separation of the water and the fuel.

De-agglomerating asphaltene in the emulsion reduces the demand for combustion air during combustion, which results in a corresponding reduction of NOx and SO3 emissions. We guarantee that PentoMuls will ensure emulsion stability for up to six months. This allows us to produce the emulsion either online just before the burners or offline in front of the storage or day tank.

Dosing skid

The PMDS (PentoMuls® Dosing System) is the key to creating a stable water-in-oil emulsion.

Fully automatic production of water-in-oil emulsion with perfectly sized water droplets.

The PMDS includes a continuous online measurement of the water content in the fuel. Therefore the water content is continuously adjusted to the fuel oil consumption and takes the natural water content of the fuel into consideration.

The PMDS can be connected to the DCS (distributed control system) for signal exchange.

The PMDS runs fully automatic. PentoMag and PentoMuls dosing rate is adjusted to the fuel flow. An interface allows to export all data to the DCS or a memory stick.

PMDS is CE compliant. 


Get in contact. Find out if PentoMuls is the matching solution for your plant. We can also offer a test run.


The flame’s core temperature is reduced by the evaporation of the water, which means lower NOx formation.

Reducing the time it takes to completely burn out the fuel allows a reduction of excess air, or oxygen levels, in the combustion.

Typically, 90% of the unburned carbon can be reduced for a total particle emission reduction of 50- 80%, depending on the fuel oil quality.


NOx can be reduced by approx. 20% and Oxygen to approx 0.5%.
SO3 is reduced in combination with PentoMag to levels below 2 ppm, resulting in an invisible plume.

Combined with PentoMag, PentoMuls water-in-oil technology allows a reduction of approx. 3-4 % of fuel oil consumption, resulting in a direct reduction of CO2 production.

Typically reduced

  • 90 % of unburned carbon 10% 10%
  • 80 %of total particle emission 20% 20%
  • 20 % of NoX 80% 80%
  • 4 % fuel oil consumption reduction 96% 96%

SO3 < 2 PPM


Pentol strives to combine emissions reduction with increased efficiency

Reducing emissions normally comes at a cost. Pentol’s primary focus on developing environmental technology, however, is to reduce emissions by optimizing combustion. This approach is extremely economical because the cost of Pentol’s fuel oil treatment is always covered by the overall reduction in fixed costs.

PentoMuls water-in-oil emulsion results in many efficiency improvements:

Decreases air pressure for better combustion efficiency
Reduces atomizing steam consumption
Reduces soot-blowing steam combustion
Reduces exit gas temperature to improve efficiency
Lessens deposits, which improves heat exchange
Extends operating time between boiler cleanings
Neutralizes corrosive deposits to decrease tube leaks

Next steps

We need to get in touch personally.

Questions regarding function, support, and sales are answered via online chat support and e-mail to, as fast as possible.

Now it´s time for a common test run with a test unit.
Let’s discuss the best individual implementation.
Each power plant is unique


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ADDITIVE – PentoMuls® for HFO » EN


ADDITIVE – PentoMuls® for HFO » ES


ADDITIVE – PentoMuls® for HFO » RU



TREATMENT – Heavy Fuel Oil Boilers » EN