Various　cation-exchanged　clinoptilolites　(M-CPs,　M　=　Li+,　Cs+,　Ca2+,　Sr2+)　were　prepared,　and　their　exchanged　thermodynamic　(and　kinetic)　properties　and　adsorption　performances　for　CH4,　N-2,　and　CO2　were　investigated.　The　results　demonstrated　that　the　relative　crystallinity　of　M-CPS　decreased　with　the　increase　of　exchange　times.　Their　chemisorbed　water　weight　loss　gradually　increased　with　the　increasing　exchange　times,　except　that　of　Cs-x-CP.　The　Delta(r)G(m)(theta)　values　of　exchange　process　of　Li+,　Cs+,　Ca2+,　or　Sr-2　presented　the　increased　trend　with　the　enhanced　exchange　times,　but　they　decreased　as　the　temperature　increased.　The　negative　Delta(r)G(m)(theta)　values　and　the　positive　Delta　H-r(m)theta　and　Delta　S-r(m)theta　values　suggested　that　the　exchanged　procedure　belonged　to　spontaneous,　endothermic,　and　entropy-increasing　behaviors;　their　kinetic　performances　followed　a　pseudo-second-order　model.　However,　the　calculated　E-a　values　of　exchange　process　showed　the　increased　tendencies　with　the　enhanced　exchange　times,　indicating　that　the　exchange　process　became　more　difficult.　Finally,　the　preliminary　adsorption　results　indicated　that　the　maximum　adsorption　amount　at　273　K　and　1　bar　was　0.51　mmol/g　of　CH4　and　0.38　mmol/g　of　N-2　by　(Na,　K)-CP,　and　2.32　mmol/g　of　CO2　by　Li-6-CP.