Fuels are substances that when combined with oxygen produce heat and are used either industrially or domestically. Fuels, depending on their condition, are divided into:

✓  Solid fuels: wood, charcoal, lignite, coal, coke, etc.

✓  Liquid fuels: lighting oil, diesel oil, heavy oil or fuel oil, motor or heating oil, alcohol, petrol etc.

✓  Gaseous fuels: propane, butane, coal gas, natural gas, etc.

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The most common physicochemical analyzes carried out depending on the type of fuel are summarized in the following table:

  • Insoluble in pentane
  • Carbonaceous residue
  • Distillation
  • Cetane number
  • Free carbon
  • Sulfur
  • Heat-producing energy
  • Kinematic viscosity at 100 oC
  • Kinematic viscosity at 40 oC
  • Kinematic viscosity at 50 oC
  • Metal shavings
  • Lead
  • Total sediment
  • Water content
  • Determination of solvent yellow 124
  • Determination of quinizarin
  • Density
  • Flash point
  • Cold filter blockage point
  • Cloud point
  • Flow point
  • Humidity