모노에탄올아민(MEA)을 이용한 이산화탄소 포집공정: 배가스 분할 유입을 통한 흡수제 재생 에너지 절감 연구

Jaeheum Jung; Youngsub Lim; Yeong Su Jeong; Ung Lee; Seeyub Yang; Chonghun Han

Korean Chemical Engineering Research, Vol.49, No.6, 764-768, December, 2011

CO2 Capture Process using Aqueous Monoethanolamine (MEA): Reduction of Solvent Regeneration Energy by Flue gas Splitting

Jaeheum Jung, Youngsub Lim, Yeong Su Jeong, Ung Lee, Seeyub Yang, and Chonghun Han^†

School of Chemical & Biological Engineering, Seoul National University, 599 Gwanak-ro, Sillim-dong, Gwanak-gu, Seoul 151-744, Korea

E-mail:

초록

모노에탄올아민(MEA)으로 대표되는 습식 아민을 이용한 이산화탄소 포집 공정은 기술적 신뢰도가 높아 초기 CCS(Carbon Capture & Storage) 시장을 주도할 것으로 전망된다. 다만 흡수제 재생에 에너지 소비가 많은 점이 단점으로 지적 받고 있어 흡수제 재생 에너지 절감을 위한 다양한 공정 개선안이 연구되고 있다. 본 논문에서는 MEA 공정에서 흡수탑으로 유입되는 배가스를 분할 유입하는 공정 개선안을 제안 하고 시뮬레이터를 이용한 공정모사를 통하여 그 효과를 보였다. 배가스를 분할 유입한 결과 흡수탑 하단부에서 냉각효과가 있었고 이로 인해 흡수제 유량이 감소하였다. 배가스 분할 비와 분할 유입 단 높이를 변경하며 최적 분할 조건을 찾았으며 이때 흡수제 유량은 6.4%, 재생 에너지는 5.8% 감소하였다.

The process of CO2 capture using aqueous Monoethanolamine(MEA) has been considered as one of the leading technologies for intermediate-term strategy to reduce the CO2 emission. This MEA process, however, consumes relatively a large amount of energy in the stripper for absorbent regeneration. For this reason, various process alternatives are recently established to reduce the regeneration energy. This paper suggests a flue gas split configuration as one of MEA process alternatives and then simulates this process using commercial simulator. This flue gas splitting has an effect on reducing the temperature of the lower section of absorber as well as decreasing the absorbent flow rate. Compared to the base model, this optimized flue gas split process provides 6.4% reduction of solvent flow rate and 5.8% reduction of absorbent regeneration energy.

Keywords:CCS;MEA Process;Flue Gas Splitting;Split Flow Configuration

[References]

IEA, “Energy Technology Perspectives,” (2010)
Min BM, KIC News., 12(1) (2009)
Mikael H, “Carbon Capture and Storage,” Department of Nuclear and Particle physics, UPPSALA University. http://www.tsl.uu. se/uhdsg/Popular/CCS.pdf. (2007)
Plaza JM, Chen E, Rochelle GT, AIChE J., 56(4), 905 (2010)
Reddy S, Johnson D, Gilmartin J, “Fluor’s Econamine FG PlusSM Technology For CO2 Capture at Coal-fired Power Plants,” FLUOR (2008)
Schacha MO, Schneiderb R, Schrammb H, Repke JU, Computer Aided Chemical Engineering., 28, 997 (2010)
Chang H, Shih CM, Sep. Sci. Technol., 40(4), 877 (2005)
Veawab A, Aroonwilas A, “Energy Requirement for Solvent Regenertion in CO2 Capture Plants,” 9th International Network for CO2 capture (2006)
Won R, Condorelli P, Scherffius J, Mariz C, “Split Flow Process and Apparatus,” EP Patent 1,152,815 (2009)
Reddy S, Scherffius J, Gilmartin J, Freguia S, “Split Flow Process and Apparatus,” US Patent US20060032377 A1 (2006)
Plaza JM, Wagener DV, Rochelle GT, Energy Procedia., 1(1), 1171 (2009)
Alie CF, “CO2 Capture with MEA: Integrating the Absorption Process and Steam Cycle of an Existing Coal-fired Power Plant,” University of Waterloo, Canada (2004)
Alie C, Douglas P, Croiset E, “Simulation and Optimization of a Coal-fired Power Plant with Integrated CO2 Capture Using MEA Scrubbing,” GHGT-8 Conference (2006)
Romeo LM, Bolea I, Escosa JM, Applied Thermal Engineering., 28(8-9), 1039 (2008)
Dugas RE, “Pilot Plant Study of Carbon Dioxide Capture by Aqueous Monoethanolamine,” MSE Thesis, University of Texas at Austin (2006)
Kim JC, Kim JM, Park JW, Wang SK, Lee KY, Lee YM, Lee CH, Chung SH, Hong WH, “Carbon Dioxide Capture and Storage,” Cheong Moon Gak (2008)
Fashami SZ, Edgar DTF, Rochelle DGT, “Modeling and Optimization of CO2 Removal in Power Plants,” TWMCC Conference (2007)
Abu-Zahra MRM, Schneiders LHJ, Niederer JPM, Feron PHM, Versteeg GF, Int. J. Greenhouse Gas Control., 1(1), 37 (2007)
“Rate-Based Model of the CO2 Capture Process by MEA using Aspen Plus,” Aspentech.

[Referenced By]

[Related Articles]

[1] IEA, “Energy Technology Perspectives,” (2010)

[2] Min BM, KIC News., 12(1) (2009)

[3] Mikael H, “Carbon Capture and Storage,” Department of Nuclear and Particle physics, UPPSALA University. http://www.tsl.uu. se/uhdsg/Popular/CCS.pdf. (2007)

[4] Plaza JM, Chen E, Rochelle GT, AIChE J., 56(4), 905 (2010)

[5] Reddy S, Johnson D, Gilmartin J, “Fluor’s Econamine FG PlusSM Technology For CO2 Capture at Coal-fired Power Plants,” FLUOR (2008)

[6] Schacha MO, Schneiderb R, Schrammb H, Repke JU, Computer Aided Chemical Engineering., 28, 997 (2010)

[7] Chang H, Shih CM, Sep. Sci. Technol., 40(4), 877 (2005)

[8] Veawab A, Aroonwilas A, “Energy Requirement for Solvent Regenertion in CO2 Capture Plants,” 9th International Network for CO2 capture (2006)

[9] Won R, Condorelli P, Scherffius J, Mariz C, “Split Flow Process and Apparatus,” EP Patent 1,152,815 (2009)

[10] Reddy S, Scherffius J, Gilmartin J, Freguia S, “Split Flow Process and Apparatus,” US Patent US20060032377 A1 (2006)

[11] Plaza JM, Wagener DV, Rochelle GT, Energy Procedia., 1(1), 1171 (2009)

[12] Alie CF, “CO2 Capture with MEA: Integrating the Absorption Process and Steam Cycle of an Existing Coal-fired Power Plant,” University of Waterloo, Canada (2004)

[13] Alie C, Douglas P, Croiset E, “Simulation and Optimization of a Coal-fired Power Plant with Integrated CO2 Capture Using MEA Scrubbing,” GHGT-8 Conference (2006)

[14] Romeo LM, Bolea I, Escosa JM, Applied Thermal Engineering., 28(8-9), 1039 (2008)

[15] Dugas RE, “Pilot Plant Study of Carbon Dioxide Capture by Aqueous Monoethanolamine,” MSE Thesis, University of Texas at Austin (2006)

[16] Kim JC, Kim JM, Park JW, Wang SK, Lee KY, Lee YM, Lee CH, Chung SH, Hong WH, “Carbon Dioxide Capture and Storage,” Cheong Moon Gak (2008)

[17] Fashami SZ, Edgar DTF, Rochelle DGT, “Modeling and Optimization of CO2 Removal in Power Plants,” TWMCC Conference (2007)

[18] Abu-Zahra MRM, Schneiders LHJ, Niederer JPM, Feron PHM, Versteeg GF, Int. J. Greenhouse Gas Control., 1(1), 37 (2007)

[19] “Rate-Based Model of the CO2 Capture Process by MEA using Aspen Plus,” Aspentech.