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The effect of demineralization on lignite activation

Samaras Peter, Diamantopoulos Evaggelos, Sakellaropoulos George P.

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URIhttp://purl.tuc.gr/dl/dias/A47BA7CB-2E8C-4D5F-AC27-DF5E90C5D8E2-
Αναγνωριστικόhttps://doi.org/10.1016/0008-6223(91)90036-I-
Αναγνωριστικόhttps://www.sciencedirect.com/science/article/pii/000862239190036I-
Γλώσσαen-
Μέγεθος10 pagesen
ΤίτλοςThe effect of demineralization on lignite activationen
ΔημιουργόςSamaras Peteren
ΔημιουργόςDiamantopoulos Evaggelosen
ΔημιουργόςΔιαμαντοπουλος Ευαγγελοςel
ΔημιουργόςSakellaropoulos George P.en
ΕκδότηςElsevieren
ΠερίληψηActivated carbons were produced from raw and demineralized Greek lignites under various experimental conditions using CO2 as the oxidizing agent. Removal of inorganic impurities was accomplished by acid washing of raw lignite with HF and HCl acid solutions. For the characterization of the activated carbons produced, adsorption of N2 at 77 K and CO2 at 298 K was used. Resulting isotherms were analysed by the BET and Dubinin-Radushkevich methods to give an assessment of microporosity. Demineralization brought about a lowering in the reactivity of the acid-washed coal and an increase in the apparent activation energy for reaction. Removal of inorganic matter resulted in activated carbons with very large surface area values and a highly developed microporosity. Surface area values of activated carbons produced from demineralized lignite were up to five times greater than those of activated carbons from untreated lignite, especially at high burn-off. Activation temperature increased the reaction rate, but it did not affect the pore structure of the final products.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2015-11-18-
Ημερομηνία Δημοσίευσης1991-
Θεματική ΚατηγορίαSurface areaen
Θεματική Κατηγορίαsurfaces areas and volumesen
Θεματική Κατηγορίαsurface areaen
Βιβλιογραφική ΑναφοράP. Samaras, E. Diamadopoulos and G. P. Sakellaropoulos, "The effect of demineralization on lignite activation," Carbon, vol. 29, no. 8, pp. 1181-1190, 1991. doi: 10.1016/0008-6223(91)90036-Ien

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