Porous structure and surface chemistry of nitrogen containing carbons from polymers

Active carbons containing up to 4.5% nitrogen (SCN-type carbons) were prepared by carbonization in argon and steam activation of a vinylpyridine resin. The porous structure of the SCN carbons with different burn-off values was characterized by gas adsorption (N2 and CO2), mercury porosimetry and hel...

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Bibliographic Details
Published inCarbon (New York) Vol. 37; no. 4; pp. 585 - 590
Main Authors Lahaye, J., Nansé, G., Bagreev, A., Strelko, V.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 08.03.1999
Elsevier Science
Subjects
A. Activated carbon
Adsorbents
C. Adsorption. XPS
Chemistry
D. Surface properties
Exact sciences and technology
General and physical chemistry
Surface physical chemistry
A. Activated carbon
D. Surface properties
C. Adsorption. XPS
Gas solid adsorption
Pore structure
Activated carbon
Carbon dioxide
Surface properties
Nitrogen
Experimental study
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Summary:Active carbons containing up to 4.5% nitrogen (SCN-type carbons) were prepared by carbonization in argon and steam activation of a vinylpyridine resin. The porous structure of the SCN carbons with different burn-off values was characterized by gas adsorption (N2 and CO2), mercury porosimetry and helium pycnometry. The SCN carbons exhibit micro- and mesoporosities, which may be regulated. By microcalorimetric and water adsorption methods it was shown, that SCN carbons present a higher surface polarity than carbons without nitrogen. The nitrogen atoms in the carbon structure behave as polar sites. The nitrogen chemistry investigated by XPS analysis is discussed. The nitrogen chemical functions in SCN carbons are transformed during heat treatment. In the char obtained at 1223 K and samples of activated carbons, the nitrogen is present in the six-membered rings of the polyaromatic structures.
ISSN:0008-6223
1873-3891
DOI:10.1016/S0008-6223(98)00225-5