Desorption achieved by water desorption is considered as complete (100%) through the mass action displacement mechanism (Shi et al., 2010). Therefore, the saturated Na-ETS-10 was flushed with water and the desorbed gas was collected in a gas collection container. Desorption started immediately after water injection and lasted for 7–8 min. A total of 320 mL gas was collected from approximately 10 g of Na-ETS-10 through water desorption; therefore the maximum adsorption capacity is 30 mL/g Na-ETS-10 or 1.24 mmol/g Na-ETS-10. Based on GC–TCD analysis, the desorbed gas consisted of 88% C2H4 and 12% C2H6 which has been reported elsewhere (Shi et al., 2010).