The　feasibility　of　deep　vinyl　chloride　removal　from　tail　gas　was　investigated　by　proposing　the　efficient　absorption　of　vinyl　chloride　using　ionic　liquids　(ILs).　The　saturation　absorption　of　three　types　of　ILs　(i.e.,　[BMPYR][Tf2N],　[BMIM][Tf2N]　and　[EMIM][Tf2N])　on　simulated　vinyl　chloride　gas　with　a　low　concentration　(5%)　was　measured　using　the　equal　volume　saturation　method,　followed　by　an　absorption　experiment　in　a　packed　tower　with　simulated　vinyl　chloride　gas　at　an　extremely　low　concentration　(0.01%).　Subsequently,　the　concept　design　and　process　optimization　of　vinyl　chloride　absorption　by　ILs　was　performed　using　Aspen　Plus　process　simulation　software.　The　results　indicate　that　the　Henry　constant　of　vinyl　chloride　is　significantly　lower　than　that　of　nitrogen,　and　the　influence　of　temperature　was　relatively　small.　The　experimental　results　of　the　absorption　tower　demonstrate　that　all　the　three　ILs　exhibited　excellent　removal　performance　(absorption　ratio　＞94%)　of　vinyl　chloride　simulation　gas　with　extremely　low　concentration　(0.01%)　under　conditions　of　25℃,　atmospheric　pressure,　and　inlet　flow　rate　of　100mL/min.　Among　them,　[BMPYR][Tf2N]　exhibited　the　highest　absorption　ratio　at　97%.　Process　optimization　results　for　[BMPYR][Tf2N]　absorbing　vinyl　chloride　tail　gas　(1%,　inlet　flow　rate　of　100kg/h)　reveal　that　under　optimal　operating　conditions:　number　of　theoretical　plates　for　absorption　tower　of　6,　a　relative　operating　pressure　of　0.25MPa,　an　IL　absorption　mass　flow　rate　of　2600kg/h,　as　well　as　a　temperature　of　160℃　and　a　pressure　of　0.001bar　for　the　secondary　flash　tank,　the　emitted　concentration　of　vinyl　chloride　can　meet　the　specified　standard　(0.0015%).　The　findings　demonstrate　that　the　utilization　of　ILs　for　efficient　removal　of　vinyl　chloride　from　exhaust　gas　and　their　extensive　application　can　significantly　contribute　to　mitigating　the　pollution　caused　by　toxic　and　hazardous　substances.　©　2024　Chinese　Society　for　Environmental　Sciences.　All　rights　reserved.