Different approaches for the development of low-cost CO{sub 2} adsorbents

Journal Article · Mon Jun 15 04:00:00 EDT 2009 · Journal of Environmental Engineering (New York)

DOI:https://doi.org/10.1061/(ASCE)EE.1943-7870.0000009· OSTI ID:21197794

Plaza, M G; Pevida, C; Arias, B; Casal, M D; Martin, C F; Fermoso, J; Rubiera, F; Pis, J J ^[1]

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1. CSIC, Oviedo (Spain)

Different carbon materials were tested as precursors for the production of CO{sub 2} adsorbents. The chemical modification of the surface of the prepared adsorbents was studied by means of three different approaches: impregnation with amines, electrophilic aromatic substitution, and heat treatment in the presence of ammonia. The samples were chemically characterized and the porous texture was evaluated from the N{sub 2} adsorption isotherms at -196 {sup o}C. The CO{sub 2} adsorption capacities of the adsorbents at 25 and 100 {sup o}C were evaluated in a thermogravimetric analyzer. In general, the incorporation of basic nitrogen functionalities enhanced the CO{sub 2} capture capacities of the modified carbons, but this increase depended on the textural properties of the support and the surface modification methodology. CO{sub 2} adsorption capacities of up to 111 mg CO{sub 2}/g at room temperature were attained. All the tested samples were completely regenerated when subjected to heat treatment at 100{sup o}C under inert atmosphere.

• OSTI ID: 21197794
• Journal Information: Journal of Environmental Engineering (New York), Journal Name: Journal of Environmental Engineering (New York) Journal Issue: 6 Vol. 135; ISSN 0733-9372; ISSN JOEEDU
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ADSORBENTS
ADSORPTION ISOTHERMS
AMINES
AMMONIA
CAPTURE
CARBON DIOXIDE
PRECURSOR
SORPTIVE PROPERTIES
TEXTURE
THERMAL GRAVIMETRIC ANALYSIS