Adsorption of carbon dioxide on chemically modified carbon adsorbents

Journal Article · Tue Sep 01 04:00:00 EDT 1998 · Separation Science and Technology

DOI:https://doi.org/10.1080/01496399808545045· OSTI ID:293012

Song, H K; Lee, K H ^[1]

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1. Pohang Univ. of Science and Technology, Kyungbuk (Korea, Republic of). Dept. of Chemical Engineering

Carbon adsorbents were chemically modified to have base sites on their surfaces, and the adsorption characteristics of carbon dioxide on them were investigated. Three kinds of carbon materials were used as support materials: two activated carbons and a carbon black. Base sites were introduced by impregnating the support materials with calcium acetate solution, followed by calcination at 700 C for 2 hours in an inert gas flow. Chemical modification reduced the surface areas of adsorbents due to the blocking of micropores. Irreversible adsorption of carbon dioxide occurs up to 300 C due to chemisorption. However, reversible adsorption was possible by pretreating adsorbents with carbon dioxide. Strong interaction between carbon dioxide and base sites enhanced adsorption of carbon dioxide at higher temperatures up to 250 C.

• Sponsoring Organization: USDOE
• OSTI ID: 293012
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 13 Vol. 33; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ACTIVATED CARBON
AIR POLLUTION CONTROL
CARBON BLACK
CARBON DIOXIDE
CHEMISORPTION
EXPERIMENTAL DATA
FLUE GAS
SORPTIVE PROPERTIES