CO2 quality control in Oxy-fuel technology for CCS: SO2 removal by the caustic scrubber in Callide Oxy-fuel Project

摘要: Abstract Flue gas from Oxy-fuel combustion is enriched with CO 2 and SO . has significant impacts throughout the system. This paper primarily focuses on operation characteristics of caustic scrubber for removal in Callide Project. Both liquid sampling analysis were carried out which comprises two spray columns, initial Quencher followed by low pressure (LP) scrubber. Dynamic changes species scrubbers have been obtained several conclusions can be drawn. From analysis, it concluded that had high capture efficiencies (97%) NO (77%), (32%). The captured most ; LP a limited amount (1%) (4%). Therefore, not necessary component capturing Liquid gave consistent results (0.011–0.037 M) contained 100 times higher concentration Total S than (0.0001–0.0006 M) existed form S(IV) S(VI) Quencher, only ratio 11% agreed reported 2–15% oxidation. phase correlated well liquid, but effective Na + Mass balance between achieved. long term storage samples accompanied pH desorption exposure to atmosphere. final depends presence HCO 3 − In liquids, around 8; absence , 4. increase 8 explained desorbed 0.0614% CPU.