the acid gas removal system includes an absorber 106 and a solvent regeneration unit 130 the co current contact system includes a static mixer 112 and a separator 120 the absorber 106 has an input opening 104 located below the lower packed section adapted for fluid communication with a feed gas line 102 the solvent regeneration unit 130 has a rich amine input opening 132 in fluid communication with a rich amine output line 128 at the bottom of the absorber 106 and a lean amine output line 134 in fluid communication with a lean amine input opening 108 near the top of the absorber 106 the static mixer 112 has a static mixer input opening 116 in fluid communication with the lean amine output line 134 a treated gas input opening 114 in fluid communication with a treated gas output line 110 from the top of the absorber 106 and a static mixer output line 118 for liquefaction applications the treated gas output line 110 is generally specified to contain less than 50 ppm co 2 and less than 5 mg nm 3 h 2 s the separator 120 has a separator input opening 122 in fluid communication with the static mixer output line 118 a separator liquid output line 124 and a separator vapor output line 126 in this embodiment a sufficient amount of lean amine from the lean amine output line 134 is sent to the static mixer 112 through the static mixer input opening 116 where it is mixed.