PentoMag® | Additive for Gas Turbines
#Avoid Corrosion and #Increase Efficiency

PentoMag® for gas turbines

Simply explained

What does the PentoMag® additive do?

The all-in-one additive for gas turbines is suitable for burning low quality heavy oils

The additive disperses the sludge in the tank and helps with the combustion.

The separator has to work less (deposits can be burned) and the total calorific value increases.

The turbine stays protected from combustion residuals and corrosions.

This has a great effect on the blade design of the turbine and the heat pipes in the recovery boiler.

Environmental protection as big goal

The treatments saves fuel, downtime, sludge disposal and not least emission.


  • Supply of turnkey equipment
  • Supply of rental units
  • Supply of test units
  • ESP Assessmentation

[Situation]   »   [Challenge]   »   [Pentol]   »   [Plan]   »   [Action]   »   [Results] 


PentoMag® 4450 has been developed with three goals in mind:

1. Protect the diesel engine and turbo loader from corrosion and deposits

2. Reduce emission

3. Reduce fuel consumption

PentoMag® 4450 is the result of a deep cooperation with one of our clients, where this additive has been developed custom designed for the clients need.

PentoMag® 4450 is more than a corrosion inhibitor.

It´s a balanced blend of

  • cracking-catalysts
  • fuel-homogenizers
  • combustion-catalysts
  • corrosion-inhibitors

PentoMag® 4450 increases the overall efficiency of diesel engines by around 5%. This may sound unbelievable, but we can achieve this goal by optimizing not only the engine itself, but most of all the fuel oil treatment station. Read the following pages to get an impression on how we can achieve this goal and get in contact with one of our combustion engineers to discuss the possibility of testing PentoMag® 4450 on your gas turbine.

Reduce sludge from storage tanks and burn it with the help of the combustion improver
Reduce emission
Neutralize corrosion in turbo and recovery boiler
Action principle

Dispersing of asphaltenes

Reducing the amount of sludge disposed
The additive includes sludge dispersing solvents and water emulsifiers
Increasing the net calorific value
Disaggregate heavy fractions of the fuel oil to improve volatilization. PentoMag® 4450 is best dosed on the filling line of the day tank or storage tank by means of a simple dosing pump. Disaggregate heavy fractions of the fuel oil to improve volatilization. In the storage tank, the heavy asphaltene chains are broken up, reducing the formation of sludge and sedimentation in the tank.
In addition, PentoMag® 4450 includes sludge dispersing solvents to stabilize the fuel, keep tanks and tank trucks free from sludge deposits and prevent the formation of sludge on the injection pumps and nozzles. Increasing the net calorific value As shown in the pictures above, a more stable fuel means that less fuel is absorbed in the separator, while maintaining the function of the separator to absorb sediments and solids.
Reducing the amount of sludge disposed has a variety of advantages: 1.) It reduces the total fuel oil consumption. Typically 10% of the fuel is absorbed in the separators, whereof approx. half of it can easily be used as proper fuel. This fuel oil saving is considerable and typically pays the whole fuel oil treatment and more! 2.) The volume of sludge produced is reduced by about 50%. This is a further cost reduction to the plant and a heavy reduction in handling and processing of sludge.

Combustion catalyst

Increase combustion surface and speed
Fuel with dissolved asphaltene content
More complete burnout
Reduce activation energy
The combustion catalysts main task is to reduce the emission of unburned carbon. With a higher amount of asphaltenes and heavy fractions of the fuel ending up in the gas turbine, this is very important to keep the combustion inside the gas turbine clean and the stack free of a black cloud.
PentoMag® 4450 contains catalyst that reduce the activation energy required for combustion of the fuel. Atomized fuel will burn faster and the amount of unburned carbon in the emission is reduced by >50%. This reduces fouling in the gas turbine itself but also in the recovery boiler and creates a visible reduction of solid emission on the stack.
As the total dust load carried through the gas turbine is reduced, the time required for cleaning deposits is reduced as well.
Dosing skid

Vanadium inhibitor

Ash particles stick to cool surfaces and build up deposits.
Even though the ash load has been reduced by half, one problem remains: The melting point of vanadium contained in the fuel is too low and leads to deposits on the blades of the gas turbine. PentoMag 4450 contains magnesium that is modifying the fusion point of these combustion residuals.
Sodium, Vanadium and Sulfur compounds can form molten deposits on turbine blades and heat pipes in recovery boiler. At low temperatures, sulfuric acid is formed, ash particles stick to cool surfaces and build up deposits. PentoMag 4450 prevents formation of these deposits, extending lifetime of all parts. The corrosion inhibitor is a magnesium compound, increasing the pH of the fly ash above 6.
Compared to traditional magnesium based additives, PentoMag 4450 can be used at a lower Mg:V rate. Traditionally, a 3:1 Mg:V ratio is used to have an over-stochiometric ratio. Because PentoMag 4450 reduces solid emission in the gas turbine by more than 50%, less potential partners for the magnesium are available and the necessity of an over-stoichiometric injection is strongly reduced.


It is surprising to discover just how much fuel is really absorbed on the separators of the power stations. Pentol expects a fuel oil saving in the order of 2 – 5 % at the least, depending on the fuel characteristics, combustion parameters and the general condition of the diesel engine. This considerable fuel oil saving is easily paying the treatment of the fuel, making this additive a class of its own.
« Reducing fouling leads to » reduced maintenance work »extended life time. PentoMag 4450 offers the additional benefit of lower visible dust emission, a fact that gets more and more important in terms of environmental legislation and pressure from the local community on the operator of the plant. « Pentol expects a saving in the order of 2-5 %» This fuel saving reflects directly on the production of CO2 on the gas turbines.

Dosing Equipment

We offer a range of individual dosing equipment with minimal maintenance and maximal precision. Get worldwide support from Pentol at Storage of chemicals Commissioning of dosing unit Setting up individual parameters Emission measurement and monitoring Pentol manufactures pumps and systems for a precise and reliable fully automatic dosing. Our scope of supply includes simple dosing systems for retrofits of power stations up to complex dosing systems that are integrated in the DCS. Pentol worldwide stores spare parts in all countries where we have active clients and provides full service to our dosing equipment to ensure a constant and reliable injection of our additives. We strongly believe that the service related to our products is key for a successful boiler treatment.

Download PDF

ADDITIVE – PentoMag for Gas Turbines