Characterization of the micropore structure of activated carbons by adsorptions of nitrogen and some hydrocarbons

Journal Article · Mon Feb 01 04:00:00 EST 1999 · Separation Science and Technology

DOI:https://doi.org/10.1081/SS-100100668· OSTI ID:347914

Guezel, F ^[1]

---

1. Dicle Univ., Diyarbakir (Turkey). Dept. of Chemistry

In the present study the effects of the duration of carbonization and physical activation properties of activated carbon from vegetable materials were investigated. Peanut shells were used to obtain active carbon. These shells were activated chemically with ZnCl{sub 2} and/or CO{sub 2} for different times, and the micropore structures of these active carbons were studied by measuring the adsorption isotherms for nitrogen and some hydrocarbons such as benzene, n-butane, isobutane, 2,2-dimethylbutane, and isooctane. As the physical activation time was increased, the primary micropores, which were measured at 0.01 relative pressure, were reduced, and they were replaced by larger secondary and tertiary micropores which were measured at 0.15--0.01 and 0.30--0.15 relative pressures. The ratios of the mesopore volume to the micropore volume also increased as the duration of physical activation increased.

• OSTI ID: 347914
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 4 Vol. 34; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
36 MATERIALS SCIENCE
ACTIVATED CARBON
ALKANES
AROMATICS
CARBONIZATION
CHEMICAL ACTIVATION
EXPERIMENTAL DATA
NITROGEN
PEANUTS
PORE STRUCTURE
SORPTIVE PROPERTIES