Synthesis of Aragonite Superstructure from Steelmaking Slag via Indirect CO2 Mineral Sequestration

Authors: Weijun Bao, Huiquan Li

Abstract:

Using steelmaking slag as a raw material, aragonite superstructure product had been synthesized via an indirect CO2 mineral sequestration rout. It mainly involved two separate steps, in which the element of calcium is first selectively leached from steelmaking slag by a novel leaching media consisting of organic solvent Tributyl phosphate (TBP), acetic acid, and ultra-purity water, followed by enhanced carbonation in a separate step for aragonite superstructure production as well as efficiency recovery of leaching media. Based on the different leaching medium employed in the steelmaking slag leaching process, two typical products were collected from the enhanced carbonation step. The products were characterized by X-ray powder diffraction (XRD) and scanning electron microscopy (SEM), respectively. It reveals that the needle-like aragonite crystals self-organized into aragonite superstructure particles including aragonite microspheres as well as dumbbell-like spherical particles, can be obtained from the steelmaking slag with the purity over 99%.

Keywords: Aragonite superstructure, Steelmaking slag, Indirect CO2 mineral sequestration, Selective leaching, Enhanced carbonation.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1330877

References:

[1] International Iron and Steel Institute. World crude steel production, http://www.worldsteel.org/statistics/crude-steel -production.html.
[2] H. F. Yang, and Q. Zhang, Resource recovery of solid waste. Chemical Industry Press: Beijing, 2004, ch. 6. (in Chinese)
[3] G. Q. Li, and C. Y. Zhu, Energy saving and environmental protection in iron & steel metallurgical industry. Metallurgical Industry Press: Beijing, 2006, ch. 4. (in Chinese)
[4] W. Wang, "Laigang's comprehensive utilization of industrial solid waste resources and counter measures, Laigang Science & Technology, no. 5, pp. 157-159, 2007. (in Chinese)
[5] E. Dalas, P. Klepetsanis, and P. G. Koutsoukos, "The overgrowth of calcium carbonate on poly(vinyl chloride-co-vinyl acetate-comaleic acid), Langmuir, vol. 15, no. 23, pp. 8322-8327, 1999.
[6] M. Kitamura, "Crystallization and transformation mechanism of calcium carbonate polymorphs and the effect of magnesium ion," J. Colloid Interface Sci., vol. 236, no. 2, pp. 318-327, 2001.
[7] F. Lippmann, Sedimentary carbonate minerals. Berlin, New York, Springer-Verlag, 1973, pp. 37-65.
[8] S. Mann, Biomineralization: Principles and concepts in bioinorganic materials chemistry, Oxford, New York: Oxford University Press, 2001, pp. 6-9.
[9] Y. Wen, L. Xiang, and Y Jin, "Synthesis of plate-like calcium carbonate via carbonation route," Mater. Lett., vol. 57, no. 16, pp. 2565-2571, 2003.
[10] Y. Kojima, A. Kawanobe, T. Yasue, and Y Arai, "Synthesis of amorphous calcium carbonate and its crystallization," J. Ceram. Soc. Jpn., vol. 101, no. 10, pp. 1145-1152, 1993.
[11] Y. Ota, S. Inui, T. Iwashita, T. Kasuga, and Y. Abe, Preparation of aragonite whiskers," J. Am. Ceram. Soc., vol. 78, no. 7, pp. 1983-1984, 1995.
[12] L. Addadi, J. Aizenberg, S. Albeck, G. Falini, and S. Weiner, "Structural control over the formation of calcium carbonate mineral phases in biomineralization," in Supramolecular stereochemistry, J. S. Siegel, Ed. Netherlands: Kluwer Academic Publishers, 1995, pp. 127-139.
[13] H. Tanaka, H. Horiuch, and T. Ohkubo, "Synthesis of Whiskerlike Aragonite CaCO3," Gypsum Lime (Sekko to Sekkai), vol. 216, no.60, pp. 3-2.5, 1988.
[14] D. Chakrabarty, and S. Mahapatra, "Aragonite crystals with unconventional morphologies," J. Mater. Chem., vol. 9, no.11, pp. 2953-2957, 1999.
[15] W. Z. Wang, G. H. Wang, Y. K. Liu, C. L. Zheng, Y. J. Zhan, "Synthesis and characterization of aragonite whiskers by a novel and simple route," J. Mater. Chem., vol. 11, no.6, pp. 1752-1754, 2001.
[16] W Seifritz, "CO2 disposal by means of silicates," Nature, vol. 345, no.6275, pp. 486, 1990.
[17] W. J. Bao, H. Q. Li, and Y. Zhang, "Progress in carbon dioxide sequestration by mineral carbonation," CIESC Journal, vol. 58, no.1, pp. 1-8, 2007. (in Chinese)
[18] J. Sipila S. Teir, and R. Zevenhoven, "Carbon dioxide sequestration by mineral carbonation: literature review update 2005-2007," Faculty of technology heat engineering laboratory report, Åbo Akademi University, 2008.
[19] W. J. J. Huijgen, G. -J. Witkamp, and R. N. J. Comans. Mineral CO2 sequestration by steel slag carbonation. Environ. Sci. Technol., vol. 39, no.24, pp. 9676-9682, 2005.
[20] C. J. King, "Acetic acid extraction," in Handbook of solvent extraction, T. C. Lo, M. H. I. Baird, and C. Hanson, Ed. New York: Wiley-interscience, 1983, pp. 567-572.
[21] A. S. Kertes, C. J. King, "Extraction chemistry of fermentation product carboxylic acids," Biotechnol. Bioeng., vol. 28, pp. 269-282, 1986.
[22] M. Kakizawa, A. Yamasaki, and Y. Yanagisawa, "A new CO2 disposal process using artificial rock weathering of calcium silicate accelerated by acetic acid," Energy, vol. 26, no.4, pp. 341-354, 2001.
[23] S. Teir, S. Eloneva, C. Fogelholm, and R. Zevenhoven, "Dissolution of steelmaking slags in acetic acid for precipitated calcium carbonate production," Energy, vol. 32, no.4, pp. 528-539, 2007.
[24] W. J. Bao, H. Q. Li, and Y. Zhang, "Process analysis and mechanism discussion of enhanced CO2 sequestration by mineral carbonation," CIESC Journal, vol. 60, no.9, pp. 2332-2338, 2009.
[25] W. J. Bao, H. Q. Li, and Y. Zhang, "Preparation of monodispersed aragonite microspheres via a carbonation crystallization pathway," Cryst. Res. Technol., vol. 44, no.4, pp. 395-401, 2009.