A　commercially　available　beaded　activated　carbon　(KBAC)　was　selected　for　combination　with　a　novel　electrothermal　swing　system　in　examining　the　Joule　heating　effects　on　the　physical　and　chemical　properties　of　activated　carbon　and　its　adsorption　regenerability　at　various　regeneration　temperatures　(120,　140,　and　160　&　DEG;C)　after　saturation　by　toluene　(TOL)　and　methylethylketone　(MEK).　The　specific　surface　area　(1278　m(2)　g(-　1))　and　micropore　volume　(0.48　cm(3)　g(-　1))　for　KBAC　after　one　adsorption/desorption　cycle　were　slightly　reduced,　while　KBAC　micropore　surface　area　(1158　m(2)　g(-　1))　and　micropore　volume　decreased　significantly　after　six　adsorption/desorption　cycles.　It　can　be　inferred　that　the　pores　of　KBAC,　especially　micropores,　are　blocked　by　heel　buildup　caused　mainly　by　formation　of　cracked　TOL　and　MEK　coke　generated　by　cyclic　Joule　heating.　The　desorption　efficiencies　of　TOL-KBAC　and　MEK-KBAC　(KBAC　saturated　with　TOL　and　MEK,　respectively)　evaluated　per　the　gravimetric　method　ranged　from　55　to　80　and　85-90%,　respectively,　and　both　showed　great　correlation　between　regeneration　temperature　and　desorption　efficiency.　Notably,　the　desorption　efficiencies　calculated　from　the　integral　method　based　on　breakthrough　curves　were　8　and　16%　lower　than　those　directly　obtained　by　the　gravitational　method　for　TOL-KBAC　and　MEK-KBAC,　respectively.　The　larger　difference　in　desorption　efficiency　evaluated　by　the　two　methods　for　MEK-KBAC　is　likely　caused　by　the　decomposition　of　MEK　into　CO　or　CO2,　which　was　less　prominent　in　TOL-KBAC.　In　the　cyclic　adsorption/desorption　tests,　the　adsorption　capacities　of　both　TOL-KBAC　and　MEK-KBAC　decreased　after　the　6-cycle　electrothermal　swing　regeneration,　such　that　TOL-KBAC　adsorption　capacity　significantly　reduced　to　around　50%,　while　that　of　MEK-KBAC　retained　around　70%　of　their　respective　original　adsorption　capacities.　As　aforementioned,　heel　buildup　blocks　the　pores　and　leads　to　decreasing　adsorption,　especially　for　TOL.