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.

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Silvestre-Albero J, Silvestre-Albero AM, Rodriguez-Reinoso F, Thommes M
Zeitschrift: Carbon
Verlag: Elsevier Ltd.
Jahr der Veröffentlichung: 2012
Band: 50
Heftnummer: 9
Seitenbereich: 3128-3133
ISSN: 0008-6223


Abstract

To get more insight into the characterization of nanoporous carbons by gas adsorption, the use of different probe mols. was compared. A series of activated carbons with ranging porosity (burn-off) were prepd. from olive stones using CO2 as activating agent and characterized using N2 and Ar adsorption at low temp. (77.4 K for N2 and 87.3 K for Ar) together with CO2 adsorption at 273 K and immersion calorimetry into liqs. of different mol. dimensions. Ar adsorption in narrow carbon micropores takes place at a higher relative pressure compared to N2 due to a weaker effective adsorption potential (lower strength of dispersion forces), including the absence of specific interactions of Ar with the adsorbent surface. Application of advanced theor. approaches based on the d. functional theory (NLDFT and QSDFT) provides an accurate description of the pore-size distribution (PSD). The PSD obtained from the Ar adsorption data at 87.3 K is in good agreement with immersion calorimetry measurements. Ar adsorption at 87.3 K in combination with the application of advanced DFT methods (e.g. QSDFT) allows for a reliable characterization of the narrow microporosity in highly heterogeneous activated carbons. [on SciFinder(R)]


Einrichtungen weiterer Autorinnen und Autoren

Quantachrome Instruments
University of Alicante / Universidad de Alicante / Universitat d'Alacant


Zitierweisen

APA:
Silvestre-Albero, J., Silvestre-Albero, A.M., Rodriguez-Reinoso, F., & Thommes, M. (2012). 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. https://dx.doi.org/10.1016/j.carbon.2011.09.005

MLA:
Silvestre-Albero, Joaquin, et al. "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 (2012): 3128-3133.

BibTeX: 

Zuletzt aktualisiert 2019-04-03 um 12:38