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Multi-purpose fuel treatment for fuels with heavy sulphur and vanadium content

HFOAID™ is a multi-purpose fuel oil treatment for residual and distillate fuel oils. It stabilizes the fuel oil in storage and maintains the pre-flame system clean, preventing formation of sludge, gum and other deposits. A powerful combustion catalyst gives more complete combustion, reducing smoke and soot and reducing fuel oil consumption. HFOAID™ controls the problems of sulphur, vanadium and sodium in fuel oil by inhibiting the formation of molten vanadium compound deposits and neutralising the formation of sulphur trioxide.

Additive is a balanced compound consisting of an organic dispersant, stabilizing and emulsifying agents and a highly effective combustion improving catalyst in a pure hydrocarbon solvent. The moisture eliminator affects the surface tension of water allowing it to be burned safely with the fuel. HFOAID™ prevents the formation of viscous sludge due to condensation water by emulsifying the water into fine particles that can aid in the combustion process. It improves fuel atomization at burner nozzles by controlling surface tension that can occur in blended fuel oils and by maintaining the pre-flame system free from sludge and deposits.

The combustion catalyst is a solution of organo-metallic compounds dissolved in a pure hydrocarbon solvent and is completely miscible with fuel oil. No settling, plugging of abrasion can occur since the ingredients are completely soluble in the fuel oil. Minute quantities of the active catalyst cause more rapid and complete burning of the oil. HFOAID™ provides significant reduction in the corrosive effects of high sulphur, high vanadium and high sodium content of residual fuel oils.

HFOAIDä effectiveness is not limited to the flame and boiler sections of a fuel oil system

HFOAID™ is a multipurpose fuel oil treatment that also solves the problems encountered in fuel oil pre-flame systems. In storage tanks, it prevents sludge formation by emulsifying condensation and dispersing sludge-forming elements throughout the fuel. It eliminates plugging of filters, preheaters and burner tips.

Surface-active material prevents separation and stratification of blended fuels, ensuring a smooth, uniform flow of oil to the burner and proper atomization. By preventing build-up of deposits in the pre-heater, its efficiency is maintained so that the fuel is at the correct temperature for the most efficient combustion.

Laboratory tests

The effectiveness of the combustion catalysts in HFOAID™ has been verified by laboratory combustion tests.

Reduction of unburned residues:

To evaluate the effects of HFOAID™ on ash and residues, 40-gram samples of untreated and treated fuel oils were burned in a combustion chamber with air introduced at atmospheric pressure. The unburned residues were collected and weighed and the melting points of the residues were determined. The percentage of unburned residue was 10.1% for the untreated Bunker C versus 6.5% for the treated samples. The ash melting point was 700-760°C for the untreated fuel and 1040 - 1120°C for the treated fuel, an increase of nearly 50%.

Increased heat release:

The figure shows a typical test result from a Parr Oxygen Bomb Calorimeter test. The purpose of this test was to compare the rate of combustion and the amount of heat release for treated and untreated Bunker C fuel oil. Oxygen was adjusted to approximate the available oxygen in a typical efficient oil burner. A 0.5-gram sample of untreated Bunker C was burned and the rate of heat rise recorded. The same oil was treated with HFOAID™ in the recommended dosage and the test repeated. During these tests when untreated oil was burned, it left carbon and sticky, tarry residues. However, when treated oil was burned, no tarry residue was found and the amount of carbon was reduced significantly.

From the curves shown in the figure, the increase in heat release for the treated fuel oil during the period shown may be calculated by integrating to determine the difference in areas of the two curves. This calculation indicated that approximately 14.6% more heat was obtained from the fuel oil treated with HFOAID™.

The rate of combustion of the samples is indicated by the slope of the temperature rise curves. The rate of heat rise was 0.015/sec. for the untreated fuel and 0.025/sec. for the treated fuel, an increase of about 60% in the rate of combustion.


Results of a calorimeter test to compare rate of combustion and amount of heat release of treated and untreated Bunker C fuel oil. Oxygen was adjusted to approximate available oxygen in typical efficient oil burner.



  • Prevents build-up of tank bottom sludge
  • Converts sludge already present to burnable fuel
  • Ensures cleaner tanks, lines, strainers, pre-heaters and burners
  • Provides more uniform flow of fuel oil to burner for best possible combustion
  • Inhibits corrosion in fuel system
  • Recovers tank capacity with no interruption of plant
  • Prevents corrosion of metal surfaces when using fuels with high vanadium and sulphur content
  • Keeps equipment in service over longer periods without shutdown for cleaning


  • Improves combustion in burner and increases efficiency
  • Reduces air pollution by minimizing the discharge of unburned hydrocarbons
  • Prevents slag formation
  • Removes old, built-up formations
  • Lowers stack temperature
  • Eliminates tube plugging


Add to fuel storage tank before refilling: For initial treatment to remove existing sludge, 2 Litres of HFOAID™ to 3 000 Litres of fuel oil is recommended. Thereafter, use 1 Litre of HFOAID™ to 3 000- 4 000 Litres of fuel oil.