Activated carbons with appropriate micropore size distribution for hydrogen adsorption

✍ Scribed by W. Zhao; V. Fierro; C. Zlotea; E. Aylon; M.T. Izquierdo; M. Latroche; A. Celzard

• Book ID: 103833007
• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 251 KB
• Volume: 36
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2010.12.137

✦ Synopsis

We measured hydrogen storage on five well-known commercial carbon materials (CCMs) and we compared their performances to those obtained on our lab-made activated carbons (ACs). H 2 uptake of our lab-made ACs was always higher than that of CCMs of similar S BET , our best AC reached 6 wt.% H 2 excess adsorption at 77 K and 4 MPa. We calculated the contribution of four ranges of pores (<0.5 nm; 0.5e0.7 nm, 0.7e2 nm and >2 nm) to the H 2 excess adsorption for the 14 carbon materials considered in this study. We clearly demonstrated that: (i) the superiority in H 2 excess adsorption of lab-made ACs over the CCMs is related to their pore size distribution; (ii) H 2 uptakes higher than 3 wt.% are due to pores with diameter wider than 0.7 nm.