| 학회 | 한국공업화학회 |
| 학술대회 | 2010년 봄 (05/13 ~ 05/14, BEXCO(부산)) |
| 권호 | 14권 1호 |
| 발표분야 | CO2 Capture and Storage |
| 제목 | Ammonia based CO2 capture process for Iron & Steel Works |
| 초록 | An ammonia-based CO2 capture process with a capacity of treating 50 Nm3/hr consisted of absorber, regenerator and NH3 concentration column using low concentration aqueous ammonia has been conducted at an iron & steel plant in Korea to remove CO2 from Blast Furnace Gas (BFG). The CO2 content of BFG was 22~25 vol.%. Our process was composed of 3 columns; absorber, stripper or regenerator and NH3 concentration column. CO2 concentration at the top of the absorber is found to be lower than 3 vol.%, and the absorption efficiency exceeds 85% as designed. The purity of CO2 from CO2 regeneration column is over 95 %. Ammonia concentration at the exits of both columns of absorber and regenerator were about 2vol.% without washing the exit gas; however the ammonia concentration could be reduced by washing the effluent gas at the tops of both columns and is negligible or lower than 10 ppm. The washing waters from tops of both columns was sent to the NH3 concentration column and NH3 was regenerated and sent to the bottom of stripper and the bottom water of NH3 concentration column was used as the washing water for NH3 capture for both columns after cooling. From the pilot plant study of low concentration ammonia-based CO2 capture technology we conclude that it can be used as an alternative to conventional amine-based CO2 capture technology, specifically when it is integrated with the effective utilization of waste heat as in the iron- and steel-making industry, where abundant low temperature waste heat can be recovered and utilized as a regeneration energy. Studies on the further improvement of the pilot plant such as the control of the prevention of the formation of solid ammonium salts is under way. |
| 저자 | Je Young Kim |
| 소속 | Research Institute of Industrial Science & Technology(RIST) |
| 키워드 | CO2 |
