Textural Characteristics of Coconut Shell-Based Activated Carbons with Steam Activation

Abstract:

Activated carbons were prepared from coconut shells by using carbonization at 600 °C for 2 h followed by water steam activation. Effects of activation temperature, hold time and water steam amount on the yield, BET surface area and micropore volume of activated carbons were evaluated. The pore structure of the activated carbon was characterized by N2 adsorption at 77K. Surface area, micropore volume and pore size distribution (PSD) of the carbons were determined by the Brunauer–Emmett–Teller (BET) equation, Dubinin–Astakhov (DA) and the Non-Local Density Functional Theory (NLDFT) methods, respectively. The results show that activated carbons with specific surface area of 1500 m2/g and pore size lower than 2 nm can be produced at 900 °C for 1~2 h. Hold time could be reduced by increasing steam amount and activation temperature, but micropore was enlarged and yield was decreased. Increasing hold time could produce more micropores when steam amount and activation temperature were more appropriate. Pore size distribution shows that activated carbons are microporous dominant.

• Periodical: Advanced Materials Research (Volumes 608-609)
• Pages: 366-373
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.608-609.366
• Online since: December 2012
• Authors: Xin Ying Wang*, Dan Xi Li, Bao Min Yang, Wei Li
• Keywords: Activated Carbon, Coconut Shells, Pore Size Distribution, Water Steam Activation

References

[1] M. Gurrath, Kuretzky, T.H.P. Bochem, L.B. Okhlopkova, A.S. Lisitsyn and V.A. Likholov: Carbon Vol. 38 (2000), p.1241.

DOI: 10.1016/s0008-6223(00)00026-9

[2] K.D. Henning and S. Schäfer: Gas Sep. Pur. Vol. 74 (1993), p.235.

[3] D.W., Mazyck and F.S. Cannon: Carbon Vol. 38 (2000), p.1785.

[4] G.M. Walker and L.R. Weatherley: Sep. Sci. Technol. Vol. 35 (2000), p.1329.

[5] G. Crini: Bioresource Technol. Vol. 97 (2006), p.1061.

[6] A., Dabrowski: Adv. Colloid and Interface Sci. Vol. 93 (2001), p.135.

[7] A. Dabrowski, P. Podkoscielny, Z. Hubicki and M. Barczak: Chemosphere Vol. 58 (2005), p.1049.

[8] O. Ioannidou and A. Zabaniotou: Renewable and Sustainable Energy Rev. Vol. 11 (9) (2007), p.1966.

[9] D. Mohan and C.U. Pittman Jr.: J. Hazardous Mater. Vol. B137 (2006), p.762.

[10] C.Y. Yin, M.K. Aroua and W.M.A. Wan Daud: Sep. Pur. Technol. Vol. 52 (2007), p.403.

[11] A. Alicia Peláez-Cid and M.M. Margarita Teutli-León, Lignocellulosic Precursors Used in the Elaboration of Activated Carbon, in: V. H. Montoya, A. B. Petriciolet (Eds.), Lignocellulosic Precursors Used in the Synthesis of Activated Carbon - Characterization Techniques and Applications in the Wastewater Treatment, Publisher: InTech, 2012, pp.1-18.

DOI: 10.5772/39364

[12] W. Su, L., Zhou and Y.P. Zhou: Carbon Vol. 41 (2003), p.861.

[13] J.F. Byrne and H., Marsh, in: Patrick, J.W. (Ed.), 1995. Porosity in Carbons, Halsted, New York, p.1.

[14] F., Rodriguez-Reinoso and A. Linares Solano, in: P.A. Thrower (Ed.), 1989. Chemistry and Physics of Carbon, Dekker, New York, p.1.

[15] M. Jagtoyen and F. Derbyshire: Carbon Vol. 31 (1993), p.1185.

[16] J. Laine, A. Calafat and M. Labady: Carbon Vol. 27 (1989), p.191.

[17] S.H. Guo, J.H. Peng, W. Li, K.B. Yang, L.B. Zhang, S.M. Zhang and H.Y. Xia: Appl. Surf. Sci. Vol. 255 (2009), p.8443.

[18] M.K.B. Gratuito, T. Panyathanmaporn, R.-A. Chumnanklang, N. Sirinuntawittay and A. Dutta: Bioresource Technol. Vol. 99 (2008), p.4887.

[19] S.J. Gregg and K.S.W. Sing: Adsorption, surface area and porosity, Academic Press, New York. 1982.

[20] A. Gil, S.A. Korili, G.Yu. Cherkashinin: J. Colloid and Interface Sci. Vol. 262 (2003), P. 603.

[21] C. Lastoskie, K.E., Gubbins and N. Quirke: Pore size distribution analysis and net working: studies of microporous sorbents, in: Characterization of porous Solids. III. Studies in Surface Science and Catalysis, vol. 87, Elsevier, New York. 1994.

DOI: 10.1016/s0167-2991(08)63064-5

[22] C. Sentorun-Shalaby, M. G. Ucak-Astarlıog Lu, L. Artok and C. Sarici: Micropor. Mesopor. Mater. Vol. 88 (2006), p.126.

[23] T.G. Zhang, W.P. Walawender and L.T. Fana: Chem. Eng. J. Vol. 105 (2004), p.53.