Air Pollution
Exhausted Gas
What is Exhausted Gas?
It is also called emissions. Generally, it refers to gases emitted by internal combustion engines, such as carbon dioxide, carbon monoxide, hydrocarbons, sulfides, hydrogen sulfides, nitrogen oxides, ammonia, ozone, and oxidants. The internal combustion engine traps the mixture of fuel and air in a sealed cylinder, compresses, and ignites the carbon in the energy quickly. After combustion, the gas is discharged to the outside, the fresh mixer is inhaled again, and the gas thrown to the outside is exhaust gas.
The large amount of gas emitted is the gasoline engine of the car. In car exhaust, it contains ingredients that pollute the atmosphere and are harmful to the human body
Risk of exhaust gas
- have a bad effect on the respiratory system
-It increases carbon dioxide in the atmosphere
Why exhaust gas is still increasing?
According to the data from KOSIS (Korean Statistical Information Service) [1]-[3], NO2 (Nitric oxide), SO2 (Sulfur dioxide), and CO (Carbon monoxide) emissions in South Korea have gradually reduced over decades. We can easily compare the emission rate by using the data on January; when the most exhaust gas is emitted due to the district heating system that uses coal energy. By examining each element, NO2 was decreased by approximately 36.2%, SO2 was decreased by approximately 55.7%, and CO was decreased by 32.1%.
However, despite these statistics, abnormal weather conditions are occurring more frequently, which makes the need to collect exhaust gas data from a broader range of sources. Referring to the data by OWID (Our World in Data) [4]-[5], they have confirmed that the worldwide emission rate of carbon dioxide and nitrous oxide is still increasing. Specifically, most of the countries included in environmental regulations are on the decline, but in countries that do not comply with or are not included in the regulations, carbon emissions are still increasing rapidly.
Solution of Exhaust Gas
reduce driving time
Even if a car idles for only 10 minutes, the car consumes 140cc of fuel and 330g of carbon dioxide
If you idle for 5 to 10 minutes per vehicle in Seoul every day while discharging, (parking, crossing, transportation)
Signal waiting, etc.) releases 18,000 tons of Co2 into the atmosphere every day.
If you reduce idling by 10 minutes a day, if buses and trucks reduce idling by 30 minutes a day, you will save a lot of energy and reduce emissions.
Exhausted gas cleaning system
It is a device that is attached to reduce air pollutants such as nitrogen oxides (NOx) emitted from vehicles. For example, the diesel vehicle's engine is equipped with a catalyst, a circulation device, and a filter to reduce emissions of carbon dioxide, carbon monoxide, and nitrogen oxides. Such a reduction device includes SCR, EGR, DPF, and the like. SCR and EGR are devices that mainly treat nitrogen compounds, and DPF is an exhaust gas post-treatment device that mainly treats fine smoke particles (PM).
