Light　olefins　are　important　raw　materials　in　the　petrochemical　industry　for　the　production　of　many　chemical　products.　In　the　past　few　years,　remarkable　progress　has　been　made　in　the　synthesis　of　light　olefins　(C2-C4)　from　methanol　or　syngas.　The　separation　of　light　olefins　by　porous　materials　is,　therefore,　an　intriguing　research　topic.　In　this　work,　single-component　ethylene　(C2H4)　and　propylene　(C3H6)　gas　adsorption　and　binary　C3H6/C2H4　(1:9)　gas　breakthrough　experiments　have　been　performed　for　three　highly　porous　isostructural　metal-organic　frameworks　(MOFs)　denoted　as　Fe2M-L　(M　=　Mn2+,　Co2+,　or　Ni2+),　three　representative　MOFs,　namely　ZIF-8　(also　known　as　MAF-4),　MIL-101(Cr),　and　HKUST-1,　as　well　as　an　activated　carbon　(activated　coconut　charcoal,　SUPELCO　(c)).　Single-component　gas　adsorption　studies　reveal　that　Fe2M-L,　HKUST-1,　and　activated　carbon　show　much　higher　C3H6　adsorption　capacities　than　MIL-101(Cr)　and　ZIF-8,　HKUST-1　and　activated　carbon　have　relatively　high　C3H6/C2H4　adsorption　selectivity,　and　the　C2H4　and　C3H6　adsorption　heats　of　Fe2Mn-L,　MIL-101(Cr),　and　ZIF-8　are　relatively　low.　Binary　gas　breakthrough　experiments　indicate　all　the　adsorbents　selectively　adsorb　C3H6　from　C3H6/C2H4　mixture　to　produce　purified　C2H4,　and　842,　515,　504,　271,　and　181　cm(3)　g(-1)　C2H4　could　be　obtained　for　each　breakthrough　tests　for　HKUST-1,　activated　carbon,　Fe2Mn-L,　MIL-101(Cr),　and　ZIF-8,　respectively.　It　is　worth　noting　that　C3H6　and　C2H4　desorption　dynamics　of　Fe2Mn-L　are　clearly　faster　than　that　of　HKUST-1　or　activated　carbon,　suggesting　that　Fe2M-L　are　promising　adsorbents　for　C3H6/C2H4　separation　with　low　energy　penalty　in　regeneration.