| Titre : | Carbon molecular sieves prepared from polymeric precursors : porous structure and hydrogen adsorption properties (2009) |
| Auteurs : | Ana Ma Silvestre-Albero, Auteur ; Anass Wahby, Auteur ; Joaquín Silvestre-Albero, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N° 15, Août 2009) |
| Article en page(s) : | pp. 7125–7131 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | Carbon molecular sieves Polymer precursors N2 adsorption CO2 |
| Résumé : | The textural characterization of a series of carbon molecular sieves (CMS) prepared from different polymer precursors has been investigated using N2 adsorption at 77 K and CO2 adsorption at 273 K, together with immersion calorimetry into liquids of different molecular dimensions. Experimental results show that the carbon molecular sieves cover a wide range of porosity, from pure microporous CMS (pore diameter below 0.56 nm) to CMS combining larger micropores (above 0.7 nm) together with a certain proportion of mesoporosity. H2 adsorption measurements on these CMS at cryogenic temperature (77 K) and ambient pressure (0.1 MPa) show that the hydrogen adsorption capacity exhibits a linear correlation with the volume of narrow micropores (Vn). Furthermore, these results confirm experimentally the necessity of a tailored micropore size in order to achieve an optimum packing density of the adsorbed hydrogen molecules (micropore size around 0.6 nm). |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie900091n |
