How the FBC Works

The FBC system works on the basis that the soot particulate in the exhaust gas, when catalysed with the fuel borne additive, will begin to oxidise in the presence of oxygen at typical exhaust temperatures, as opposed to 600°C for un-catalysed soot particulate. This lower oxidation temperature means that more frequent and lower temperature regeneration of the filter is possible.

An active regeneration option uses automotive glow plugs to trigger regeneration, making it possible to regenerate at even lower exhaust temperatures.

The FBC system consists of 2 major components, the FBC dosing system and an extremely fine silicon carbide (SiC) wall-flow filter.

FBC Dosing System

The system is designed to use the Satacen^® 3 fuel borne catalyst. It is an iron and strontium based additive that is stored in a separate tank on the vehicle and dosed in precise amounts, 1 litre Satacen^® 3 to 2200 litres diesel, directly into the fuel line just before it reaches the engine. It is burnt with the fuel in the engine, catalysing the particulate matter produced during combustion.

Fuel + Air + Satacen^® 3 FBC forms catalysed particulate (FE₂O₃C_particulate/CH)

Filter Section

The catalysed particulate (soot) in the exhaust gas enters the exhaust system, when the exhaust gas temperature reaches approximately 400°C the catalysed particulate (soot) is oxidized, removing over 90% of it. Alternatively, the active system option can be included to trigger regeneration.

The oxidisation process converts the catalysed soot to gasses which can pass through the wall of the filter and out of the exhaust system. The Iron Oxide FE₂O₃ (ash) is collected and retained in the filter

The SiC filter is able to withstand the brief periods of high temperatures generated during the oxidation of the particulate matter.