1 August 2002

The “Trap-Muffler” diesel particulate filter (DPF) system developed by Dr. Julius Rim of Doubletree Technologies has been included by the Korean Ministry of Environment in its 3rd Evaluation Program of DPF technologies available in the world.

Since 1995, Korea has been planning to impose a mandatory DPF retrofit program for in-use diesel vehicles in order to solve the severe air-pollution problem in metro Seoul area, populated by more than 1.5 million diesel vehicles. Chosen together with Rim’s DPF system are the catalytic filter systems manufactured by Engelhard, Johnson Matthey, and SK Corporation. All chosen DPF systems will be tested over a 60,000 km durability period, as required for the verification of control devices for sale in Korea.

The Korean program is expected to be structured based on the experience of the world’ biggest diesel retrofit programs for in-use vehicles currently being implemented in the State of California for up to 1.2 million heavy duty diesels, and in Tokyo, Japan, for up to 900,000 diesel vehicles.

The world’s first modern DPF-system for reducing PM emissions has been commercialized on a diesel car by Peugeot in France. Rim’s “Trap-Muffler” is similar to the Peugeot’s system in featuring active DPF regeneration in conjunction with the use of a fuel borne catalyst (FBC). According to Julius Rim, his patented system can also reduce NOx emissions through the use of a cooled EGR (exhaust gas recirculation), which is integrated with the active DPF into one energy-efficient process.

Dr. Rim’s system is not sensitive to sulfur and can be operated with fuels of any sulfur content.

Source: Julius Rim