One solution is the use of exhaust gas recirculation (EGR) in order to reduce NOx. Some of the exhaust gases are cooled and fed back into the engine to achieve a combustion with less NOx formation. This results in lower NOx emissions. The reduction of particulate emissions is achieved by high injection pressure.
How might the concentration of NO in automobile exhaust be reduced?
Catalysts containing ruthenium are used to reduce nitric oxide in automobile exhaust emissions but volatile oxides formed under transient oxidising conditions during operation can severely affect them.
How do you reduce NOx in a diesel engine?
How do you reduce NOx emissions from diesel engines? A. By lowering the combustion temperature, typically by Exhaust Gas Recirculating (EGR). Some exhaust gas is cooled and injected back into the combustion chamber.
Which fuel is lower on emissions?
Diesel engines are “lean-burn”, meaning they use less fuel and more air to get the same performance as a petrol engine. So, while diesel fuel contains slightly more carbon (2.68kg CO₂/litre) than petrol (2.31kg CO₂/litre), overall CO₂ emissions of a diesel car tend to be lower.
Does NOx cause smog?
NOx can cause serious health damage to humans, including respiratory diseases. NOx is also responsible for smog and the typical brown cloud that covers larger cities and produces poor air quality. NOx reacts with volatile organic compounds in the presence of sunlight and forms ground-level ozone.
What can be reduced by using exhaust gas recirculation EGR effectively?
Abstract: Exhaust gas recirculation (EGR) is an effective strategy to control NOx emissions from diesel engines. The EGR reduces NOx through lowering the oxygen concentration in the combustion chamber, as well as through heat absorption.
Do cars produce nitrogen dioxide?
NO2 primarily gets in the air from the burning of fuel. NO2 forms from emissions from cars, trucks and buses, power plants, and off-road equipment.
How much it will bring down NOx emissions from diesel vehicle?
Thanks to the EGR system, the NOx emission in diesel engines can be reduced by up to 50% [26]. However, in this method, combustion is worsened, engine performance decreases, and other pollutants, especially particulate emissions (PM) slightly increases.
Which is the best way to reduce NOx emissions?
There are various techniques, depending on the applications, although a lot of effort goes into designing burners which reduce NOx emissions in the first place. Selective Catalytic Reduction (SCR) is the most common method in diesel vehicle exhausts, but it is expensive so isn’t use in small cheap vehicles.
What can I put in my engine to prevent deposits?
The formation of harmful deposits can be controlled by adding detergent-dispersants to gasoline, the most common of which is polybutene succinimide. Used with a petroleum carrier oil, detergent-dispersants help keep the intake manifold and ports clean.
What should I do if I have carbon deposits in my engine?
For heavy carbon deposits inside the combustion chamber, a top cleaning product may be added to the engine to soak for 15-20 minutes to loosen the deposits. An oil change afterward is recommended because some of the cleaner will end up in the crankcase.
What are the steps to reduce air pollution?
These steps include: reducing toxic emissions from industrial sources; reducing emissions from vehicles and engines through new stringent emission standards and cleaner burning gasoline; and addressing indoor air pollution though voluntary programs.