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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-
Identifierhttps://doi.org/10.1016/0008-6223(91)90036-I-
Identifierhttps://www.sciencedirect.com/science/article/pii/000862239190036I-
Languageen-
Extent10 pagesen
TitleThe effect of demineralization on lignite activationen
CreatorSamaras Peteren
CreatorDiamantopoulos Evaggelosen
CreatorΔιαμαντοπουλος Ευαγγελοςel
CreatorSakellaropoulos George P.en
PublisherElsevieren
Content SummaryActivated 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
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2015-11-18-
Date of Publication1991-
SubjectSurface areaen
Subjectsurfaces areas and volumesen
Subjectsurface areaen
Bibliographic CitationP. 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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