Furnace (Ash Content)



1100°C Ashing Furnace (AAF)

  • Maximum operating temperature 1100°C
  • Chamber capacities of 3, 7 or 18 litres
  • Robust mullet muffle design of 3 & 7 liter models and silicon carbide tiles of 18 liter model offer strong resistance to carbon build up and chemical attack
  • Constant airflow of 4-5 volume changes per minute ensures rapid combustion
  • Pre-heated airflow to maintain excellent temperature uniformity
  • 3 & 7 liter models supplied with inconel tray & handle for easy loading/unloading
  • Tall chimney for fume exhaust by convection
  • Vertical counter-balanced door keeps hot door insulation away from operator
  • Positive break door safety switch isolates chamber from power supply, when the door is opened
  • Double skinned construction allows convection air flow to cool the outer case, to conform to EN61010 safety standard
  • Choice of PID controller or programmers
  • Pictured left are 3 & 7 litre models
  • In analytical chemistry, ashing is the process of mineralization for preconcentration of trace substances prior to chemical analysis. Ash is the name given to all non-aqueous residue that remains after a sample is burned, which consists mostly of metal oxides. Ash is the waste product of fire, and its content may be listed in nutrition labels, such as for pet food.

Ash is one of the components in the proximate analysis of biological materials, consisting mainly of salty, inorganic constituents. It includes metal salts which are important for processes requiring ions such as Na+ (Sodium), K+ (Potassium), and Ca2+ (Calcium). It also includes trace minerals which are required for unique molecules, such as chlorophyll and hemoglobin.


Why we need to know?

  • Ash it is not burning remaining after combustion, in particular in the catalytic cracking cycle oil and slurry oil fuel, the silica-alumina catalyst powder can cause the pump, valves, accelerated wear. In addition, the ash will cover the boiler heating surface, so that the heat transfer deterioration.
  • Ash accumulation in the DPF (ash and soot) increases with oil consumption and lubricant ash content, as lubricant additives are generally the largest source of ash.
  • Ash derived from lubricant additives is composed primarily of zinc, calcium, and magnesium in the form of sulfates, phosphates, and oxides.
  • Prediction of engine-out ash emissions based solely on bulk oil consumption and lubricant sulfated ash levels results in an over-estimate of ash emissions due to lubricant volatility and differences in speciated oil consumption rates.
  • Pressure drop across the particulate filter is not indicative of total ash levels.
  • Catalyst performance may be negatively impacted by specific ash-related elements, primarily sulfur and phosphorous.
  • Ash distribution within the DPF, whether along the walls or in the channel end plugs may be influenced by filter operating conditions and regeneration strategy.


Ash Content for General Oil and Pentas Flora Recovered Oil:


General Oil

Ash Content (wt %)

Base Oil

< 0.1

Bunker Fuel

< 2


< 0.1

Heavy Oil

< 1.5

Light Fuel Oil 80 cSt

< 0.3

Medium Fuel Oil 180 cSt

< 0.3

Tyre Oil

< 0.3

Waste Engine Oil

< 1

Pentas Flora Recovered Oil

Ash Content (wt %)

Eco Light Fuel Oil

< 0.4

Super Light Fuel Oil

< 0.3

Green Light Fuel Oil

< 0.5

Base Light Fuel Oil

< 0.5