On the methane adsorption capacity of activated carbons: in search of a correlation with adsorbent properties
Φόρτωση...
Ημερομηνία
Συγγραφείς
Contreras, M.
Lagos, G.
Escalona, N.
Soto-Garrido, G.
Radovic, L. R.
Garcia, R.
Τίτλος Εφημερίδας
Περιοδικό ISSN
Τίτλος τόμου
Εκδότης
Περίληψη
Τύπος
Είδος δημοσίευσης σε συνέδριο
Είδος περιοδικού
peer-reviewed
Είδος εκπαιδευτικού υλικού
Όνομα συνεδρίου
Όνομα περιοδικού
Journal of Chemical Technology and Biotechnology
Όνομα βιβλίου
Σειρά βιβλίου
Έκδοση βιβλίου
Συμπληρωματικός/δευτερεύων τίτλος
Περιγραφή
BACKGROUND: There exists now a widely held view that the methane storage capacity on an activated carbon is not related to any of the routinely determined properties of the adsorbent, such as surface area or micropore volume. This has been confirmed and a correlation pursued with other physical and/or chemical properties of both commercially available carbons and those prepared in the laboratory. Textural characteristics (from nitrogen adsorption isotherms at 77 K) considered were BET-equivalent specific surface area, DR micropore volume and Horvath-Kawazoe micropore size distribution. Chemical properties were evaluated using Fourier transform infrared (FTIR) spectroscopy, thermal programmed decomposition (TPD) and Boehm titrations. Both kinetic and equilibrium methane adsorption experiments were performed at 273 and 298 K and up to 3.5 MPa. RESULTS: Using phosphoric acid to activate peach stones together with additional thermal treatment enabled the production of activated carbons with 137 v/v methane adsorption capacity at 298 K. CONCLUSIONS: The presence of acidic surface functional groups has a detrimental influence on methane uptake, due to the chemical inertness of the adsorbate and/or to pore blockage of the adsorbent. Basic surface functional groups (pyrone), together with a desirable pore size distribution centered at ca 0.8 nm, are thought to be responsible for improved methane adsorption capacity on such activated carbons. (C) 2009 Society of Chemical Industry
Περιγραφή
Λέξεις-κλειδιά
methane, activated carbons, adsorption, microporosity, gas storage, natural-gas storage, pore-size distribution, surface-chemistry, fibers, simulation, pressure, textures, discs
Θεματική κατηγορία
Παραπομπή
Σύνδεσμος
<Go to ISI>://000271585100018
http://onlinelibrary.wiley.com/store/10.1002/jctb.2239/asset/2239_ftp.pdf?v=1&t=h0aj2i35&s=0a7466427da687c5a9b76a5095d49460d2ff862f
http://onlinelibrary.wiley.com/store/10.1002/jctb.2239/asset/2239_ftp.pdf?v=1&t=h0aj2i35&s=0a7466427da687c5a9b76a5095d49460d2ff862f
Γλώσσα
en
Εκδίδον τμήμα/τομέας
Όνομα επιβλέποντος
Εξεταστική επιτροπή
Γενική Περιγραφή / Σχόλια
Ίδρυμα και Σχολή/Τμήμα του υποβάλλοντος
Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών Υγείας. Τμήμα Ιατρικής