Hydrogen is a clean and renewable energy carrier. Because conventional materials and technologies for hydrogen storage cannot meet the needs of fuel-cell-powered automobiles, how to store hydrogen more efficiently to reach the DOE target has become one of the most urgent and difficult problems to be solved in hydrogen applications. The activated rayon-based carbon fiber (ARCF) were prepared by KOH treatment. SEM, XRD and BET were used to characterize the samples. The adsorption performance and porous structure were investigated by nitrogen adsorption isotherm at low temperature (77K) on the base of BET and DFT. The BET specific surface area and micropore volume of the rayon based activated carbon fibers were 3144 m~2/g and 0.744 m~3/g respectively. Hydrogen storage properties of the samples were taken with PCT measuring system based on volumetric method, Suzuki Shokan Corporation. In the experiment, the sample was put into the reaction container, and the container was immersed into liquid nitrogen carried in a Dewar vessel. In this way, the hydrogen storage properties at 77K were obtained. The hydrogen storage of the rayon based activated carbon fibers was 7.01 wt% at 4MPa.
展开▼
