Removal of Ambient Air Pollution by Activated Carbon Fiber (ACF) installed in flow-through fence: Numerical Evaluation of its Performance in Realistic 3D Space

Abstract

Mechanism of NO_x removal by porous fences filled inside with activated carbon fiber (ACF) wasnumerically investigated in detail. It was found:(1) NOx removal efficiency is highly dependent on flow structure formedby the fences. For example, ACF fence on the upstream side is more effective than that on the downstream side, because acirculating flow over the road space tends to form high concentration zone close to the ACF fence on the upstream side, the pollutants which can be readily removed by the fence.(2) The pollutants are removed both inside and on the ACFfences.