Process simulation and optimization to reduce H₂S content in condensate oil

Due to high H₂S content in the stabilized condensate products of an oil and gas processing plant in Central Asia, the high H₂S concentrations in the air around the loading platform during the process of condensate oil loading seriously affect the safety of the operators. The reasons of the ultrahigh H₂S content in condensate oil were analyzed, and the condensate stabilization unit was simulated by HYSYS software. The results showed that without changing the technological process and the process equipments, when the temperature at the bottom of the column was controlled from 155 ℃ to 160 ℃, and the pressure was 0.3 MPa, by adjusting the feed ratio at the top and middle of the column to 1:1, H₂S content in stabilized condensate decreased from 170 mg/L to 20 mg/L or so, and H₂S was not detected around the loading platform.