Emissions control

Catalytic converters

Catalytic converters are specialist devices mounted in the exhaust system to minimise the emission of harmful pollutants.

Your car produces gases such as carbon dioxide, carbon monoxide, hydrocarbons and nitrogen oxides which can be poisonous or carcinogenic. The converter substrate creates a chemical reaction between these gases converting them to other relatively harmless gases. Oxygen sensors in the exhaust also help reduce emissions by adjusting the fuel mixture.

Operating between 400 – 800°C, a catalytic converter can reduce your vehicle’s emission of carbon monoxide, nitrogen oxides and hydrocarbons by up to 90%.
Photo of two catalytic converters

How a catalytic converter works

Diagram of how a catalytic converter works

The ceramic catalytic converter substrate has a grid structure coated in precious metals.
Precious metals in the coating react with exhaust fumes which pass through the porous substrate. This reduces harmful emissions.

The process

Active materials

Alumina, Cerium Oxide

Rare earth stabilisers

Platinum, Paladium and Rhodium

Exhaust gas in

· HC  =  Hydrogen
· CO  =  Carbon Monoxide
· NOX  =  Nitrogen Oxide

Major reactions

· CO  +  ½O2  =  CO2
· H4C2  +  3O  =  2CO2  +  2H2O
· CO  +  NOX  =  CO2  +  N2

Exhaust gas out

· H2O  =  Water
· CO2  =  Carbon Dioxide
· N2  =  Nitrogen

Contact our team to discuss the right catalytic converter solution for your vehicle.

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A diesel particulate filter (DPF) removes soot from the exhaust gas of diesel engines. DPFs, like catalytic converters, work to reduce vehicle emissions, but instead of letting exhaust gases flow through it like a catalytic converter, the blocked ends of the DPF substrate force the exhaust gas through the substrate walls, where the soot particles are deposited. This results in cleaner exhaust gas going out.

Contact our team to find out more about the range of DPFs we stock.

Photo of a cut open diesel particulate filter