Destruction　of　hydrogen　sulfide　using　dielectric　barrier　discharge　plasma　in　a　coaxial　cylindrical　reactor　was　carried　out　at　atmospheric　pressure　and　room　temperature.　Three　types　of　DBD　reactor　were　compared　in　terms　of　specific　energy　density　(SED),　equivalent　capacitances　of　the　gap　(Cg)　and　the　dielectric　barrier　(Cd),　energy　yield　(EY),　and　H2S　decomposition.　In　addition,　byproducts　during　the　decomposition　of　H2S　and　destruction　mechanism　were　also　investigated.　SED　for　all　the　reactors　depended　almost　linearly　on　the　voltage.　In　general,　Cg　decreased　with　increasing　voltage　and　with　the　existence　of　pellet　material,　while　Cd　displayed　the　opposite　trend.　The　removal　efficiency　of　H2S　increased　substantially　with　increasing　AC　frequency　and　applied　voltage.　Longer　gas　residence　times　also　contributed　to　higher　H2S　removal　efficiency.　The　choice　of　pellet　material　was　an　important　factor　influencing　the　H2S　removal.　The　reactor　filled　with　ceramic　Raschig　rings　had　the　best　H2S　removal　performance,　with　an　EY　of　7.30　g/kWh.　The　likely　main　products　in　the　outlet　effluent　were　H2O,　SO2,　and　SO3.　(C)　2011　Elsevier　B.V.　All　rights　reserved.