International Journal of Iron & Steel Society of Iran

International Journal of Iron & Steel Society of Iran

Investigation of Hydrate Formation Conditions of Simulated Flue Gas in TBAB Solution with Potential Application in CO2 Capture in Steel Industry

Document Type : Technical Note

Authors
TAFCO Company (Member of KSC holding), Ahvaz, Iran
Abstract
The rising amount of CO2 in the atmosphere is one of the most urgent environmental issues of our age. In order to reduce anthropogenic CO2 emissions, carbon capture and storage (CCS) can be applied to large point sources like steel-making plants; In recent years, the new approach of hydrate-based CO2 capture (HBCC) from flue gas has attracted considerable attention. Information on the hydrate equilibrium conditions of flue gas is the prerequisite for this method. In this study, semi-clathrate hydrate equilibrium conditions for the simulated flue gas (CO2-N2 mixture) in TBAB solution, as a good promoter for HBCC, were modeled in the temperature range of 281-288.1 K. The CO2 concentration in the gas mixture was varied in the range of 15-40 mol%, and the TBAB concentration was varied in the range of 5-10 wt.%. The results clearly showed the promoting effect of TBAB on the hydrate equilibrium conditions. The modelling results showed good agreement with experimental data, with a relative average deviation of 9.5%. Also, the model had better accuracy at lower CO2 concentrations.
Keywords

 [1] Zhang Z, Hong S, H, and, Lee C, Role and impact of wash columns on the performance of chemical absorption-based CO2 capture process for blast furnace gas in iron and steel industries, Energy. 2023; 271: 127020.
[2] Tian S, Jiang J, Zhang Z, and Manovic V, Inherent potential of steelmaking to contribute to decarbonisation targets via industrial carbon capture and storage, Nat Commun. 2018; 9: 4422.
[3] D'Alessandro D.M, Smit B, and Long J.R, Carbon dioxide capture: prospects for new materials, Chem Int Edit. 2010; 49: 6058.
[4] Eslamimanesh A, Mohammadi A.H, and Richon D, Thermodynamic modeling of phase equilibria of semi-clathrate hydrates of CO2, CH4, or N2 + tetra-nbutylammonium bromide aqueous solution, Chem Eng Sci. 2012; 81: 319.
[5] ISfaxi I.B.A, Durand I, Lugo R, Mohammadi A.H, and Richon D, Hydrate phase equilibria of CO2 + N2 + aqueous solution of THF, TBAB or TBAF system, Int J Greenhouse Gas Control. 2014; 26: 185.
[6] Mohammadi A.H, Anderson R, and Tohidi B, Carbon monoxide clathrate hydrates: equilibrium data and thermodynamic modeling, Am J Chem Eng. 2005; 51: 2825.
[7] Dashti H, Yew L, and Lou X, Recent advances in gas hydrate-based CO2 capture, J. Nat. Gas Eng. 
 2015; 23: 195.
[8] Liao Z.X, Guo X.Q, Li Q, Sun Q, Li J, Yang L. Y, and Zuo J.Y, Experimental and modeling study on the phase equilibria for hydrates of gas mixtures in TBAB solution, Chem Eng Sci. 2015; 137: 656.
[9] Chen G.J and Guo T.M, A new approach to gas hydrate modelling, J Chem Eng. 1998; 71: 145.
[10] Lindenbaum S and Boyd G.E, Osmotic and activity coefficients for the symmetrical tetraalkyl ammonium halides in aqueous solution at 25, Phys Chem. 1964; 68: 911.
[11] Amado E, Blanco L.H, Isopiestic determination of the osmotic and activity coefficients of aqueous solutions of symmetrical and unsymmetrical quaternary ammonium bromides at T=(283.15 and 288.15) K, Fluid Ph Equilib. 2009; 54: 2696.
[12] Sohnel O, Novotny P, and Solc Z, Densities of aqueous solutions of 18 inorganic substances, J Chem Eng Data. 1984; 29: 379-382.
[13] Meysel P, Oellrich L, Bishnoi P.R, and Clarke M.A, Experimental investigation of incipient equilibrium conditions for the formation of semi-clathrate hydrates from quaternary mixtures of (CO2+ N2+ TBAB+ H2O), J Chem Thermodyn. 2011; 43: 1475.
[14] Mohammadi A.H, Eslamimanesh A, Belandria V, Richon D, Naidoo P, and Ramjugernath D, Phase equilibrium measurements for semi-clathrate hydrates of the (CO2 + N2 + tetra-n-butylammonium bromide) aqueous solution system, J Chem Thermodyn. 2012; 46: 57.
[15] Belandria V, Mohammadi A.H, Eslamimanesh A, Richon D, Sanchez-Mora M. F, and Galicia-Luna L. A, Phase equilibrium measurements for semi-clathrate hydrates of the (CO2 + N2 + tetra-n-butylammonium bromide) aqueous solution systems: Part 2, Fluid Ph Equilib. 2012; 322: 105.
[16] Tzirakis F, Stringari P, Von Solms N, Coquelet C, and Kontogeorgis G, Hydrate equilibrium data for the CO 2 + N2 system with the use of tetra-n-butylammonium bromide (TBAB), cyclopentane (CP) and their mixture, Fluid Ph Equilib. 2016; 408: 240.