In conductive heating technique, a double ended cylindrical steel column with an inner diameter of 1 cm and bed height of
7 cm was used as a reactor. Following saturation of the adsorbent bed, the column was wrapped with a heating tape (OmegaluxTM) followed by an additional insulation tape. The heating tape was connected to a 120 V AC power source through a solid state relay interfaced to a DAC system. A Labview program was used to initiate and control the heating. The bed temperature was maintained at 190 1C. A shielded type K thermocouple (Omega) was used to measure the bed temperature. Data were recorded using a DAC and a Labview program as described in the microwave desorption experiments. Desorbed gas collection system and post desorption adsorbent cooling system were analogous to those used in the microwave desorption experiments. Heating was continued until no gas evolution was observed. A block diagram
for adsorption and regeneration by microwave heating and conductive heating process is illustrated in Fig. 1 Swing capacity is generally defined as the adsorption capacity or working capacity of an adsorbent between two extreme states of the swing force (Anson et al., 2009). In this work, swing capacity of Na-ETS-10 is defined as the amount of gas desorbed
during heating from 22 1C to 190 1C. The maximum swing capacity was achieved by water desorption (Shi et al., 2011).
Gas recovery was calculated based on Eq. (1)