Abstract
There found many places where the concentrations of nitrogen dioxides (NO2) exceed the environmental air quality standard. The main sources of NO2 emission in urban area are the automobile mainly heavy duty trucks and the concentrations are high at main road intersections, underground parking lots and, bus terminal etc. To improve the air quality at these areas active air cleaning system are required. The Acid Gas Eliminator removes nitrogen dioxides at an efficiency as high as 80%, and simultaneously. It is also able to remove smoke and soot. To examine the efficiency of the compact gas purification system, numerical simulations of airflow and pollutant diffusion in a road were carried out for two dimensional and three dimensional numerical model. The simulated results show that the gas purifier works to improve the road side environment under low wind condition.
