Simultaneous absorption of SO2 and CO2 from flue gas using aqueous ammonia

QI Guojie; WANG Shujuan; GAO Jubao; LIU Jinzhao; ZHAO Bo; ZHUO Yuqun; CHEN Changhe

doi:10.16511/j.cnki.qhdxxb.2016.25.030

PDF(1370 KB)

Journal of Tsinghua University(Science and Technology) ›› 2016, Vol. 56 ›› Issue (8) : 885-892. DOI: 10.16511/j.cnki.qhdxxb.2016.25.030

THERMAL ENGINEERING

Simultaneous absorption of SO₂ and CO₂ from flue gas using aqueous ammonia

{{article.zuoZhe_EN}}

Author information +

History +

Abstract

Coal-fired power plants emit large quantities of SO₂ and CO₂, so more research is needed on SO₂ and CO₂ capture. Experimental tests were conducted in a wetted wall column system to analyze the simultaneous absorption of SO₂ and CO₂ using aqueous ammonia (weight percent, 0.2%-7%). The Aspen Plus RateSep model was then used to analyze the CO₂ and SO₂ mass transfer in the packed column to comprise the design of the ammonia based CO₂ and SO₂ absorption system. The experiments show that the SO₂ selectivity absorption factor decreases as the CO₂ volume concentration increases. The CO₂ volume concentration (5%-20%) has little effect on the SO₂ mass transfer and the SO₂ absorption rate is always an order of magnitude higher than that of CO₂. Increasing the SO₂ mass concentration and reaction temperature has a negative effect on the CO₂ absorption and the ammonia tends to selectively absorb the SO₂. When the SO₂ loading (mole concentration ratio between SO₂ and NH₃ in the aqueous ammonia solvent) increases from 0.1 to 0.4, the CO₂ mass transfer rate significantly decreases. Increasing the ammonia mass concentration improves the absorption of both CO₂ and SO₂ and the predicted results are in good agreement with the experimental data. Thus, the packed column combined with an ammonia scrubber to reduce the ammonia slip and a resin exchange device used to control the SO₂ loading can achieve simultaneous removal of CO₂ and SO₂.

Key words

CO₂ capture / desulfuration / simultaneous absorption / ammonia / CO₂ / SO₂

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

QI Guojie, WANG Shujuan, GAO Jubao, LIU Jinzhao, ZHAO Bo, ZHUO Yuqun, CHEN Changhe. Simultaneous absorption of SO₂ and CO₂ from flue gas using aqueous ammonia[J]. Journal of Tsinghua University(Science and Technology). 2016, 56(8): 885-892 https://doi.org/10.16511/j.cnki.qhdxxb.2016.25.030

References

[1] 马广大.大气污染控制工程[M].北京:中国环境科学出版社,2002.MA Guangda.Air Pollution Control Engineering[M].Beijing:China Environmental Science Press,2002.(in Chinese)
[2] 白冰,李小春,刘延峰,等.中国CO₂集中排放源调查及其分布特征[J].岩石力学与工程学报,2006,25(S1):2918-2923.BAI Bing,LI Xiaochun,LIU Yanfeng,et al.Preliminary study on CO₂ industrial point sources and their distribution in China[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(S1):2918-2923.(in Chinese)
[3] Shaw D.Cansolv CO₂ capture:The value of integration[J].Energy Procedia,2009,1:237-246.
[4] GAO Jubao,WANG Shujuan,ZHOU Shan,et al.Corrosion and degradation performance of novel absorbent for CO₂ capture in pilot-scale[J].Energy Procedia,2011,4:1534-1541.
[5] Sexton J A.Amine Oxidation in CO₂ Capture Processes[D].Austin:University of Texas at Austin,2008.
[6] Closmanna F,Rochelle T G.Degradation of aqueous methyldiethanolamine by temperature and oxygen cycling[J].Energy Procedia,2011,4:23-28.
[7] 翁淑容.有机胺湿法脱硫实验研究[D].南京:南京理工大学,2007.WENG Shurong.Experimental Study on Wet Desulfurization using Amine[D].Nanjing:Nanjing University of Science,2007.(in Chinese)
[8] 翟林智,钟秦,王娟.可再生乙二胺湿法烟气脱硫实验研究[J].中国电机工程学报,2009,29(29):57-62.ZHAI Linzhi,ZHONG Qin,WANG Juan.Experimental study on the regenerable wet flue gas desulfurization with ethylenediamine[J].Proceedings of the CSEE,2009,29(29):57-62.(in Chinese)
[9] Mandal B P,Bandyopadhyay S S.Simultaneous absorption of CO₂ and H₂S into aqueous blends of 2-amino-2-methyl-1-propanol and diethanolamine[J].Chemical Engineering Science,2005,60:6438-6451.
[10] 张成芳.醇胺溶液吸收硫化氢和二氧化碳(二):同时吸收和吸收的选择性[J].石油与天然气化工,1984,13(6):10-19.ZHANG Chengfang.H₂S and CO₂ absorption using amine:Simultaneous absorption and selective absorption[J].Chemical Engineering of Oil and Gas,1984,13(6):10-19.(in Chinese)
[11] Pacheco M,Rochelle T G.Rate-based modeling of reactive absorption of CO₂ and H₂S intoaqueous methyldiethanolamine[J].Ind Eng Chem Res,1998,37:4107-4117.
[12] Park S,Park D,Oh K,et al.Simultaneous absorption of CO₂ and SO₂ into aqueous 2-amino-2-methy-1-propanol[J].Separation Science and Technology,2009,44(3):543-568.
[13] Choi W,Min B,Shon B,et al.Effect of ammonia on the absorption kinetics of carbon dioxide into aqueous 2-amino-2-methyl-1-propanol solutions[J].Ind Eng Chem Res,2009,48(8):4022-4029.
[14] 仇中柱,龚少林,郑超润,等.填料塔内氨水同时吸收SO₂和CO₂的试验研究[J].动力工程学报,2011,31(9):700-704.QIU Zhongzhu,GONG Shaolin,ZHENG Chaorun,et al.Simultaneous absorption of SO₂ and CO₂ by aqueous ammonia in a packed column[J].Journal of Chinese Society of Power Engineering,2011,31(9):700-704.(in Chinese)
[15] 刘芳,王淑娟,陈昌和,等.电厂烟气氨法脱碳技术研究进展[J].化工学报,2009,60(2):269-278.LIU Fang,WANG Shujuan,CHEN Changhe,et al.Research progress of CO₂ capture by using ammonia from flue gas of power plant[J].Journal of the Chemical Industry and Engineering,2009,60(2):269-278.(in Chinese)
[16] 钟秦.燃煤烟气脱硫脱硝技术及工程实例[M].北京:化学工业出版社,2007.ZHONG Qin.Coal-fired Flue Gas Desulfurization and Denitrification Technology and Pilot Plant Demonstration[M].Beijing:Chemical Industry Press,2007.(in Chinese)
[17] 秦锋.氨水吸收二氧化碳的化学反应动力学与吸收热研究[D].北京:清华大学,2010.QIN Feng.Study on Kinetics and Heat of Absorption of CO₂ in Aqueous Ammonia[D].Beijing:Tsinghua University,2010.(in Chinese)
[18] Resnik P K.Aqua ammonia process for simultaneous removal of CO₂,SO₂ and NOx[J].International Journal of Environmental Technology and Management,2004,4:89-104.
[19] 齐国杰,王淑娟,刘今朝,等.燃煤烟气中CO₂对氨法脱碳的影响[J].化工学报,2012,63(7):2202-2209.QI Guojie,WANG Shujuan,LIU Jinzhao,et al.Impact of SO₂ on CO₂ capture in coal-fired flue gas using aqueous ammonia[J].Journal of the Chemical Industry and Engineering,2012,63(7):2202-2209.(in Chinese)
[20] Ebrahimi S,Picioreanu C,Kleerebezem R,et al.Rate-based modeling of SO₂ absorption into aqueous NaHCO₃/Na₂CO₃ solutions accompanied by the desorption of CO₂[J].Chemical Engineering Science,2003,58:3589-3600.
[21] Liu J,Wang S,Zhao B,et al.Absorption of carbon dioxide in aqueous ammonia[J].Energy Procedia,2009,1:933-940.
[22] Yih S,Sun C.Simultaneous absorption of H₂S and CO₂ into di-isopropanolamine solution[J].The Canadian Journal of Chemical Engineering,1987,65(4):581-585.
[23] Zhang Y,Chen H,Chen C,et al.Rate-based process modeling study of CO₂ capture withaqueous monoethanolamine solution[J].Ind Eng Chem Res,2009,48:9233-9246.
[24] Chen E.Carbon Dioxide Absorption into Piperazine Promoted Potassium Carbonate using Structured Packing[D].Austin:University of Texas at Austin,2007.
[25] Kozak F,Petig A,Morris E,et al.Chilled ammonia process for CO₂ capture[J].Energy Procedia,2009,1:1419-1426.
[26] 高巨宝.胺法捕集燃煤电厂烟气中CO₂的中试实验研究[D].北京:清华大学,2012.GAO Jubao.Pilot-scale Experimental Study on CO₂ Capture using Amine-based Absorbent from Coal-fired Power Plants[D].Beijing:Tsinghua University,2012.(in Chinese)