TOPSOE™ platinum free Base Metal Coating

Diesel engine exhaust particulates constitute a risk to health and environment and are removed by silicon carbide or cordierite filters. With TOPSOE™ platinum free base metal – palladium coating, the regeneration of the filter is done easily and cost effectively.

The passive and forced regeneration with TOPSOE™ BMC-211 is comparable to platinum coated filters and without any oxidation of NO to NO₂, but rather a reduction of NO₂, which is an acute toxic compound with an unpleasant smell. Furthermore, the Base Metal palladium Coating catalyst oxidizes hydrocarbons and carbon monoxide.

Features

TOPSOE™’s Base Metal Coating catalyst is applicable to any silicon carbide or cordierite filter and exhibits features like:

• passive regeneration: balance point temperature at 400°C (≈300°C with pre-DOC)
• fast forced regeneration at 580°C
• high HC/CO conversion during regeneration
• 20-90% NO₂ removal below 300°C
• 5-10% reduced NOx emissions
• thermal durability up to 900°C with interim excursions to even higher temperatures
• low pressure drop increase
• cost effective solution – no platinum

The coating of the TOPSOE™ BMC-211 catalyst is unique and consists of several base metal oxides and palladium.

Original equipment manufacturer

The TOPSOE™ BMC-211 catalytic coating in combination with engine management offers a cost advantage in comparison to platinum coated filters. The regeneration properties are comparable and the NO₂ emissions are significantly lower than for platinum coatings. TOPSOE™ BMC-211 is well suited for systems with a pre-DOC upstream the filter to comply with the Euro 5 and Euro 6 for passenger cars.

Retrofit

For older buses and trucks, where engine management is often restricted, the regeneration can be assured by use of a fuel borne catalyst. Together with the fuel borne catalyst, the soot can be regenerated down to 250-300°C. With post injection systems, the TOPSOE™ BMC-211 catalytic coating offers an advantageous and cost effective retrofit solution.