Removal of Gaseous Air Pollutants Using Chemically Impregnated Activated Carbon

Abstract:

Benzene, Toluene, Ethylbenzene and Xylene (BTEX) and NOx are generally emitted from gasoline vehicles, which have significance effects to humans. Gasoline evaporation is a major source of high BTEX concentration in the ambient air, whereas NOx is formed under high temperature during combustion. Since, the number of vehicles in Bangkok is rapidly increased nowadays, BTEX and NOx are become major air pollutants on many roads in the city. This study intends to develop an air cleaner system to remove BTEX and NOx in car environment. This is because an air condition system in a car may suck the polluted intake air from outside while a car is running or stopping on a traffic road. Measurement of BTEX and NOx in-car/out car concentrations was performed on clean roads and high-polluted roads. The In-car sampler boards were securely strapped to the front of the back passenger seat in circulation mode and the Out-car were measured simultaneously. Around 120 minute sampling were used at the clean and polluted area.

Keywords: Benzene, Toluene, Ethylbenzene, Xylene, NOx, In-car, Out-car, and Bangkok