2.3. Benzene and toluene adsorption studies
Adsorption experiments for a benzene and toluene were performed, each at 150 ppm concentration in air. The benzene and toluene adsorption studies were conducted in a continuous flowtype fixed-bed system under an atmospheric pressure system. The experimental setup is schematically shown in Fig. 1. The total flow rate was 6 L/min as it passed through an adsorbent column (diameter: 20 mm). A cross-section area of the adsorption tower is 0.000314 m2, flow rate and residence time were 0.3 m/sec, 0.6 s respectively.