THERMAL SCIENCE

International Scientific Journal

George G. Stavropoulos

,

Irene S. Diamantopoulou

,

George E. Skodras

,

George P. Sakellaropoulos

HIGH ACTIVITY CARBON SORBENTS FOR MERCURY CAPTURE

ABSTRACT
High efficiency activated carbons have been prepared for removing mercury from gas streams. Starting materials used were petroleum coke, lignite, charcoal and olive seed waste, and were chemically activated with KOH. Produced adsorbents were primarily characterized for their porosity by N2 adsorption at 77 K. Their mercury retention capacity was characterized based on the breakthrough curves. Compared with typical commercial carbons, they have exhibited considerably enhanced mercury adsorption capacity. An attempt has been made to correlate mercury entrapment and pore structure. It has been shown that physical surface area is increased during activation in contrast to the mercury adsorption capacity that initially increases and tends to decrease at latter stages. Desorption of active sites may be responsible for this behavior.
KEYWORDS
activated carbons, KOH activation, surface area, pore volumes, mercury adsorption
PAPER SUBMITTED: 2005-07-22
PAPER REVISED: 2006-01-19
PAPER ACCEPTED: 2006-03-14
DOI REFERENCE: https://doi.org/10.2298/TSCI0603019S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2006, VOLUME 10, ISSUE Issue 3, PAGES [19 - 26]
REFERENCES
  1. Serre D. S., Silcox D. G., Adsorption of elemental mercury on the residual carbon in coal fly ash, Ind. Eng. Chem. Res., 39 (2000), pp. 1723-1730
  2. Krishnan S.V., Gullett K.B., Jozewicz W., Sorption of elemental mercury by activated carbons, Environ. Sci. Technol., 28 (1994), pp. 1506-1512
  3. Hsing-Cheng H., Rood J. M., Rostam-Abadi M., Shiaoguo C., Ramsay C., Effects of sulfur impregnation temperature on the properties and mercury adsorption capacities of activated carbon fibers (ACFs), Environ. Sci. Technol., 35 (2001), pp. 2785-2791
  4. Stavropoulos G. G., Precursor materials suitability for super activated carbons production, Fuel Processing Technology, 86 (2005), 11, pp. 1151-1240
  5. Rouquerol F., Rouquerol J. and Sing K., Adsorption by Powders and Porous Solids, Academic Press, London, 1999, pp. 166
  6. Rouquerol F., Rouquerol J. and Sing K., Adsorption by Powders and Porous Solids, Academic Press, London, 1999, pp. 19
  7. Mendioroz S., Guijarro M. I., Bermejo P. J. and Munoz V., Mercury retrieval from flue gas by monolithic adsorbents based on sulfurized sepiolite, Environ. Sci. Technol., 33 (1999), pp. 1697-
  8. Mercedes Maroto-Valer M., Zhang Y., Granite, E. J., Tang Z. and Pennline H. W., Effect of porous structure and surface functionality on the mercury capacity of a fly ash carbon and its activated sample, Fuel, 84 (2005) pp. 105-108
  9. Guijarro M. I., Mendioroz S. and Munoz V., Effect of morphology of sulfurized materials in the retention of mercury from gas streams, Ind. Eng. Chem. Res. 37 (1998) pp. 1088-1094
  10. Hancai Z., Feng J. and Jia G., Removal of elemental mercury from coal combustion flue gas by chloride-impregnated activated carbon, Fuel 83 (2004) pp. 143-146
PDF VERSION [DOWNLOAD]
High activity carbon sorbents for mercury capture

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence