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Textural characterisation of activated carbons obtained from poly(ethylene terephthalate) by carbon dioxide activation

AutorParra Soto, José Bernardo ; Ovín Ania, María Concepción ; Arenillas de la Puente, Ana ; Pis Martínez, José Juan
Palabras clavePET
Activated Carbon
Fecha de publicación2002
CitaciónStudies in Surface Science and Catalysis 144: 537-543 (2002)
ResumenPolymer waste nowadays accounts for a large part of municipal solid waste and so poses a problem of considerable concern for the environment. In this study, it is reported that poly(ethylene terephthalate) pyrolysis is a valuable process with no residual solids, as all the products obtained are of potential use, i.e., energy from the gases produced (58%), terephthalic acid (approximately 20%), and a solid black residue (22%) which, when activated, shows interesting properties, making it useful as an adsorbent. Pyrolysis of raw PET was performed under nitrogen atmosphere, and ulterior activation was achieved at 925°C, with a flow rate of 10 mL min-1 of CO2, up to different burn-off degrees. Textural characterisation of the samples was carried out by measuring apparent density (mercury at 0.1 MPa), mercury porosimetry, and N2 and CO2 adsorption isotherms, at -196 and 0°C, respectively. The active carbons obtained were mainly microporous, with BET apparent surface areas of up to 2468 m2 g-1.
Descripción7 pages.-- Issue title: Characterization of Porous Solids VI, Proceedings of the 6th International Symposium on the Characterization of Porous Solids (COPS-VI).
Versión del editorhttp://dx.doi.org/10.1016/S0167-2991(02)80178-1
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