What is the difference between catalytic converter and particulate filter?

What is diesel particulate filter?

A diesel particulate filter is a special automobile device that helps to clean the exhaust of a diesel engine from a large amount of soot. With its help, it is possible to retain about 80-90% of soot particles.

Вiesel particulate filter
Particulate filter

What is catalytic converter?

A catalytic converter is an integral part of an automobile’s exhaust system that keeps most toxic substances from entering the atmosphere. In fact, the catalyst performs the same functions as the particulate filter.

Сatalytic converter

Differences between particulate filter and catalytic converter

Catalysts are used in gasoline cars, however, the difference in the diesel ignition system is very different. For this reason, another device was required that could remove soot.

Filters were first used in 2001 and were an integral part of diesel trucks. Since 2009, the EURO5 standard was adopted, according to which this device should be present on all cars operating on “diesel fuel”.

The main objective of a particulate filter is to capture soot. However, unlike the catalyst, it does not fight harmful exhaust gases coming from the exhaust into the atmosphere. To solve this problem, many manufacturers offer devices that combine the action of both systems.

In other words, inside the device there are cells with channels with a small cross-section, which fight against soot particles, and on the sides there are special cells whose tasks include the fight against harmful gases. Thus, the diesel system is equipped with a powerful tool for capturing more atmospheric pollutants.