Patent ID: 9463416
Filing Date: 2016-10-11
CPC Classification: B01D,C10L,Y02C

Claim Text:
1. A system for a multi-staged capture of CO 2 and H 2 S from a pressurized gas stream producing a clean pressurized gas stream containing less than 1 ppm H 2 S and less than 10 ppm CO 2 and achieving greater than 99.9% capture efficiency, wherein the pressure in said pressurized gas stream and said clean pressurized gas stream is above atmospheric pressure, comprising: (a) an alkaline solution containing 5-15 molal NH (b) a first multistage absorber for absorbing CO (c) a second multistage polishing absorber using water for capturing the residual of CO (d) a main stripper for stripping said CO (e) a sour water stripper for stripping said CO