There　is　a　particular　demand　to　explore　low-volatility　and　structurally　tunable　absorbents　for　efficiency,　selectivity　and　reversibility　in　capturing　H2S.　For　the　first　time,　the　performance　of　deep　eutectic　solvents　(DESs)　composed　of　1-ethyl-3-methylimidazolium　chloride　([Emim]Cl)　and　acetamide　(AA)　were　examined　as　physical　absorbents　for　H2S　capture.　The　physical　properties　of　[Emim]Cl-AA　DESs,　and　solubilities　of　both　H2S　and　CO2　in　them　were　measured.　Relevant　experimental　results　demonstrated　that　the　solubilities　of　H2S　in　[Emim]Cl-AA　DESs　(1.1　mol/kg　at　298.2　K　and　1.023　bar)　significantly　exceed　those　of　CO2　(0.040　mol/kg　at　298.2　K　and　1.027　bar).　[Emim]Cl-AA　DESs　exhibit　higher　H2S　solubilities　and　superior　ideal　H2S　to　CO2　selectivities　(e.g.,　the　ideal　H2S/CO2　selectivity　of　[Emim]Cl-AA　(1:0.5)　is　28.5　at　298.2　K)　than　those　physical　absorbents　ever　reported.　The　recyclability　of　[Emim]Cl-AA　DESs　for　H2S　selective　capture　was　also　evaluated,　which　was　found　to　be　very　stable　in　ten　continuous　absorption　and　regeneration　cycle　experiments.　The　mechanism　of　H2S　capture　by　[Emim]Cl-AA　DESs　was　finally　illustrated　at　the　molecular　level　with　the　support　of　theoretical　calculations.　©　2024　Elsevier　B.V.