Browse > Article
http://dx.doi.org/10.9713/kcer.2012.50.6.1002

Theoretical Study on Optimal Conditions for Absorbent Regeneration in CO2 Absorption Process  

Park, Sungyoul (Greenhouse Gas Department, Korea Institute of Energy Research)
Publication Information
Korean Chemical Engineering Research / v.50, no.6, 2012 , pp. 1002-1007 More about this Journal
Abstract
The considerable portion of energy demand has been satisfied by the combustion of fossil fuel and the consequent $CO_2$ emission was considered as a main cause of global warming. As a technology option for $CO_2$ emission mitigation, absorption process has been used in $CO_2$ capture from large scale emission sources. To set up optimal operating parameters in $CO_2$ absorption and solvent regeneration units are important for the better performance of the whole $CO_2$ absorption plant. Optimal operating parameters are usually selected through a lot of actual operation data. However theoretical approach are also useful because the arbitrary change of process parameters often limited for the stability of process operation. In this paper, a theoretical approach based on vapor-liquid equilibrium was proposed to estimate optimal operating conditions of $CO_2$ absorption process. Two $CO_2$ absorption processes using 12 wt% aqueous $NH_3$ solution and 20 wt% aqueous MEA solution were investigated in this theoretical estimation of optimal operating conditions. The results showed that $CO_2$ loading of rich absorbent should be kept below 0.4 in case of 12 wt% aqueous $NH_3$ solution for $CO_2$ absorption but there was no limitation of $CO_2$ loading in case of 20 wt% aqueous MEA solution for $CO_2$ absorption. The optimal regeneration temperature was determined by theoretical approach based on $CO_2$ loadings of rich and lean absorbent, which determined to satisfy the amount of absorbed $CO_2$. The amount of heating medium at optimal regeneration temperature is also determined to meet the difference of $CO_2$ loading between rich and lean absorbent. It could be confirmed that the theoretical approach, which accurately estimate the optimal regeneration conditions of lab scale $CO_2$ absorption using 12 wt% aqueous $NH_3$ solution could estimate those of 20 wt% aqueous MEA solution and could be used for the design and operation of $CO_2$ absorption process using chemical absorbent.
Keywords
Carbon Dioxide; $CO_2$ Loading; Absorbent; Regeneration; Equilibrium; Electrolyte NRTL;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Chakma, A., "Separation of $CO_{2}$ and $SO_{2}$ from Flue Gas Streams by Liquid Membranes," Energy Conv. Manag., 36(6), 405-410 (1995).   DOI   ScienceOn
2 Al-Ghawas, H. A., Hagewiesche, D. P., Ruiz-lbanez, G. and Sandall, O. C., "Physicochemical Properties Important for Carbon Dioxide Absorption in Aqueous Methyldiethanolamine," J. Chem. Eng. Data, 34(4), 385-391(1989).   DOI
3 Saha, A. and Bandyopadhyay, S., "Kinetics of Absorption of $CO_{2}$ into Aqueous Solutions of 2-amino-2-methyl-1-propanol," Chem. Eng. Sci., 50(22), 3587-3598(1995).   DOI   ScienceOn
4 Bosch, H., Versteeg, G. F. and van Swaaij, W. P. M., "Kinetics of the Reaction of $CO_{2}$ with the Sterically Hindered Amine 2- Amino-2-methyl Propanol at 298K," Chem. Eng. Sci., 45(5), 1167-1173(1990).   DOI   ScienceOn
5 Dey, A. and Aroonwilas, A., "$CO_{2}$ Absorptionin to MEA-AMP blend : Mass Transfer and Absorber Height Index," Energy Procedia, 1, 211-215(2009).   DOI   ScienceOn
6 Mandal, B. P. and Bandyopadhyay, S. S., "Absorption of Carbon Dioxide Into Aqueous Blends of 2-amino-2-methyl-1-propanol and Monoethanolamine," Chem. Eng. Sci., 61(16), 5440-5447(2006).   DOI   ScienceOn
7 Yeh, J. T., Resnik, K. P., Rygle, K. and Pennline, H. W., "Semibatch Absorption and Regeneration Studies for $CO_{2}$ Capture by Aqueous Ammonia," Fuel Process. Technol., 86(14-15), 1533- 1546(2005).   DOI   ScienceOn
8 Lee, J. W. and Li, R., "Integration of Fossil Energy Systems with $CO_{2}$ Sequestration Through NH4HCO3 Production," Energy Convers. Manage., 44(9), 1535-1546(2003).   DOI   ScienceOn
9 Huang, H. and Chang, S. G., "Method to Regenerate Ammonia for the Capture of Carbon Dioxide," Energy Fuels, 16(4), 904-910(2002).   DOI   ScienceOn
10 Hsunling, B. and An, C. Y., "Removal of $CO_{2}$ Greenhouse Gas by Ammonia Scrubbing," Ind. Eng. Che. Res., 36(6), 2490-2493 (1997).   DOI   ScienceOn
11 Kurz, F., Rumpf, B. and Maurer, G., "Vapor-liquid-sold Equilibria in the System $NH_{3}$-$CO_{2}$-$H_{2}O$ from Around 310 to 470K: New Experimental Data and Modeling," Fluid Phase Equilib., 104, 261-275(1995).   DOI   ScienceOn
12 Darde, V., Thomsen, K., van Well, W. J. M. and Stenby, E. H., "Chilled Ammonia Process for $CO_{2}$ Capture," Energy Procedia, 1(1), 1035-1042(2009).   DOI   ScienceOn
13 Biling, V., Rumpf, B., Strepp, F. and Maurer, G. G., "An Evolutionary Optimization Method for Modeling the Solubility of Ammonia and Carbon Dioxide in Aqueous Solutions," Fluid Phase Equilib., 53, 251-259(1989).   DOI   ScienceOn
14 Goppert, U. and Maurer, G., "Vapor-liquid Equilibria in Aqueous Solutions of Ammonia and Carbon Dioxide at Temperatures Between 333 and 393 K and Pressures up to 7 MPa," Fluid Phase Equilib., 41(1-2), 153-185(1988).   DOI   ScienceOn
15 Diao, Y. F., Zheng, X. Y., He, B. S., Chen, C. H. and Xu, X. C., "Experimental Study on Capturing $CO_{2}$ Green House Gas by Ammonia Scrubbing," Energy Convers. Manage., 45(13-14), 2283-2296(2004).   DOI   ScienceOn
16 Liu, J. H., Wang, S. J., Zhao, B., Tong, H. L. and Chen, C. H. "Absorption of Carbon Dioxide in Aqueous Ammonia," Energy Procedia, 1(1), 993-940(2009).
17 Kim, J. Y., Han, K. W. and Chun, H. D., "$CO_{2}$ Absorption with Low Concentration Ammonia Liquor," Energy Proceedia, 1(1), 757-762(2009).   DOI   ScienceOn
18 McLanon, C. R. and Duncan, J. L., "Testing of Ammonia Based $CO_{2}$ capture with Multi-Pollutant Control Technology," Energy Procedia, 1(1), 1027-1034(2009).   DOI   ScienceOn
19 Gal, E., "Ultra Cleaning Combustion Gas Including the Removal of $CO_{2}$," World Intellectual Property, Patent WO2006022885, (2006).
20 Park, S. Y., Yi, K. B., Ko, C. H., Park, J. H., Kim, J. N. and Hong, W. H., "Selection of Optimal Operating Conditions for a Continuous $CO_{2}$-Capture Process Using an Aqueous Ammonia Solution," Energy Fuels, 24, 3704-3709(2010).   DOI   ScienceOn