Hydrogen adsorption in mesoporous carbons

Abstract

The hydrogen adsorption of mesoporous carbon materials with different mesostructures, surface areas, and pore volumes has been investigated. Experimental results indicate that the hydrogen adsorption capacities are dominantly related to their surface areas. A hydrogen adsorption capacity of 1.78 wt % was obtained at 77 K and ambient pressure of 850 mm Hg (0.11 MPa) for the mesoporous carbon with a surface area of 2314m2∕g.

CO2 activation of ordered porous carbon CMK-1 for hydrogen storage

“…No distinct difference of H 2 uptake exists between C950-4 and C950-6. The highest amount of hydrogen uptake 2.19 wt% was obtained for C950-6, which is almost twice that of CMK-1, and is higher than that of the reported porous carbons synthesized by silica templates [11,29]. We attribute the notable increase of hydrogen storage capacity to the change of textural property caused by activation, such as the increases of specific surface areas and volumes of pores with suitable pore sizes.…”

Synthesis of Ordered Mesoporous Carbon Materials with Semi-Graphitized Walls via Direct In-situ Silica-Confined Thermal Decomposition of CH4 and Their Hydrogen Storage Properties

“…14). The C-SBA-15-Fe-800 sample prepared at 800°C gives the highest hydrogen adsorption capacity, about 2.0 wt% at 10 bar and 77 K, which is comparable to those of most porous carbon materials considering the surface area and pore volumes [41][42][43][44][45]. This large capacity is attributed to its small mesopore size, high surface area (1000 m 2 /g).…”

Preparation of pore-size controllable activated carbon fibers from bamboo fibers with superior performance for xenon storage

“…Several investigations revealed that linear relationships could be observed between the hydrogen uptake capacity and micropore volume or surface area [25][26][27][28]. The dependence of the xenon adsorption capacity on the surface area, pore volume and micropore volume (<2 nm) is studied as shown in Fig.…”