Abstract
The textural characteristics of granular activated carbons obtained by chemical activation of African palm stone with CaCl2 were established with nitrogen adsorption at 77 K, carbon dioxide adsorption at 273 K, and immersion calorimetry in benzene. A comparison was made between the fit of N2 adsorption experimental data with the calculated isotherms using two models: non-local density functional theory and quenched solid density functional theory. The calorimetric technique allowed measurement of the immersion enthalpies in benzene and subsequent calculation of the accessible areas of the carbons. A correlation was established between the enthalpic parameters and it was found that immersion enthalpy in benzene increased with the increasing surface area and pore volume of the carbons. Also the samples were characterized chemically using Boehm titrations.
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References
Beyaz, S., Darkrim, F., Levesque, D.: Adsorption properties and structural characterization of activated carbons and nanocarbons. J. Phys. Chem. B 108(39), 15211–15215 (2004)
Budinova, T., Ekinci, E., Yardim, F., Grima, A., Bjornobom, E., Minkova, V., Goranova, M.: Characterization and application of activated carbon produced by H3PO4 and water vapor activation. Fuel Process. Technol. 87, 899–905 (2006)
Denoyel, R., Fernandez-Colinas, J., Grillet, Y., Rouquerol, J.: Assessment of the surface area and microporosity of activated charcoals from immersion calorimetry and nitrogen adsorption data. Langmuir 9(2), 515–518 (1993)
Garrido, J., Linares-Solano, A., Martín-Martínez, J.M., Molina-Sabio, M., Rodríguez-Reinoso, F., Torregrosa, R.: Use of nitrogen vs. carbon dioxide in the characterization of activated carbons. Langmuir 3(1), 76–81 (1987)
Juárez-Galán, J.M., Silvestre-Albero, A., Silvestre-Albero, J., Rodríguez-Reinoso, F.: Synthesis of activated carbon with highly developed “mesoporosity”. Microporous Mesoporous Mater. 17(1–2), 519–521 (2009)
Kaneko, K., Ishii, C., Ruike, M., Kuwabara, H.: Origin of superhigh surface area and microcrystalline graphitic structures of activated carbons. Carbon 30(7), 1075–1088 (1992)
Marsh H., Rodriguez-Reinoso F.: Characterization of activated carbon. In: Activated Carbon, vol. 1, pp. 157–164, UK, Elsevier Science Ltd (2006)
Moreno, J.C., Giraldo, L., Gómez, A.: Applicability of the Stoeckli–Bansal–Donnet equation for the determination of total area of activated carbons by microcalorimetry of immersion. Inst. Sci. Technol. 26(5), 533–541 (1998)
Moreno-Pirajan, J.C., Giraldo, L.: Determination of the immersion enthalpy of activated carbon by microcalorimetry of heat conduction. Instrum. Sci. Technol. 28(2), 171–178 (2000)
Neimark, A.V., Yangzheng, L., Ravikovitch, P.I., Thommes, M.: Quenched solid density functional theory and pore size analysis of micro-mesoporous carbons. Carbon 47(7), 1617–1628 (2009)
Rouquerol J., Rouquerol F., Sing K.S.W.: Assessment of mesoporosity. In: Adsorption by Powders and Porous Solids Principles, Methodology and Applications, vol. 1, pp. 204–209, UK, Elsevier Science Ltd (1999)
Silvestre-Albero, J., Gómez, C., Sepúlveda-Escribano, A., Rodríguez-Reinoso, F.: Characterization of microporous solids by immersion calorimetry. Colloid Surf. A 187, 151–165 (2001)
Silvestre-Albero, A., Gonçalves, M., Itoh, T., Kaneko, K., Endo, M., Thommes, M., Rodríguez-Reinoso, F., Silvestre-Albero, J.: Well-defined mesoporosity on lignocellulosic-derived activated carbons. Carbon 50, 66–72 (2012a)
Silvestre-Albero, J., Silvestre-Albero, A., Rodríguez-Reinoso, F., Thommes, M.: Physical characterization of activated carbons with narrow microporosity by nitrogen (77.4 K), carbon dioxide (273 K) and argon (87.3 K) adsorption in combination with immersion calorimetry. Carbon 50(9), 3128–3133 (2012b)
Sing, K.: Characterization of porous materials: past, present and future. Colloid Surf. A 241(1–3), 3–7 (2004)
Sing, K.S.W., Everett, D.H., Haul, R.A.W., Moscou, L., Pierotti, R.A., Rouquerol, J., Siemieniewska, T.: Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity. Pure Appl. Chem. 57(4), 603–619 (1985)
Valladares, D., Rodríguez Reinoso, F., Zgrablich, G.: Characterization of active carbons: the influence of the method in the determination of the pore size distribution. Carbon 36(10), 1491–1499 (1998)
Vargas, D.P., Giraldo, L., Moreno, J.C.: Calorimetric study of the CO2 adsorption on carbon materials. J. Therm. Anal. Calorim. 117(3), 1299–1309 (2014)
Yu, G., Thommes, M., Cychosz, K., Neimark, A.V.: Quenched solid density functional theory method for characterization of mesoporous carbons by nitrogen adsorption. Carbon 50(4), 1583–1590 (2012)
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The authors wish to thank the Universidad de los Andes and the Universidad Nacional de Colombia for funding under the Master Agreement and under the Record of Understanding entered into by the Departments of Chemistry of both universities. Special thanks go to the Faculty of Science and the Vice-Rectory of Research at the University of the Andes (Bogotá, Colombia) for funding this research.
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Vargas, D.P., Giraldo, L. & Moreno-Piraján, J.C. Characterisation of granular activated carbon prepared by activation with CaCl2 by means of gas adsorption and immersion calorimetry. Adsorption 22, 717–723 (2016). https://doi.org/10.1007/s10450-016-9764-2
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DOI: https://doi.org/10.1007/s10450-016-9764-2