Hydrogen Adsorption on Activated Carbon an Carbon Nanotubes Using Volumetric Differential Pressure Technique

2010 ◽  
Author(s):  
S. M. Sanip ◽  
M. A. R. Saidin ◽  
M. Aziz ◽  
A. F. Ismail ◽  
Mohamad Rusop ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
Hydrogen Adsorption ◽  
Differential Pressure

Pressure Isotherms of Hydrogen Adsorption in Carbon Nanostructures

2001 ◽  
Vol 706 ◽  
Author(s):  
Xiaohong Chen ◽  
Urszula Dettlaff-Weglikowska ◽  
Miroslav Haluska ◽  
Martin Hulman ◽  
Siegmar Roth ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
Hydrogen Storage ◽  
Carbon Nanostructures ◽  
Room Temperature ◽  
Storage Capacity ◽  
Hydrogen Adsorption ◽  
Single Wall Carbon Nanotubes ◽  
Hydrogen Storage Capacity ◽  
Carbon And Graphite

AbstractThe hydrogen adsorption capacity of various carbon nanostructures including single-wall carbon nanotubes, graphitic nanofibers, activated carbon, and graphite has been measured as a function of pressure and temperature. Our results show that at room temperature and a pressure of 80 bar the hydrogen storage capacity is less than 1 wt.% for all samples. Upon cooling, the capacity of hydrogen adsorption increases with decreasing temperature and the highest value was observed to be 2.9 wt. % at 50 bar and 77 K. The correlation between hydrogen storage capacity and specific surface area is discussed.

Tailoring singlewalled carbon nanotubes for hydrogen storage

2005 ◽  
Vol 20 (12) ◽  
pp. 3214-3223 ◽  
Author(s):  
M.K. Haas ◽  
J.M. Zielinski ◽  
G. Dantsin ◽  
C.G. Coe ◽  
G.P. Pez ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
Aspect Ratio ◽  
Hydrogen Adsorption ◽  
Accurate Data ◽  
Single Walled Carbon Nanotube ◽  
Hydrogen Capacity ◽  
Nanotube Bundles ◽  
Helium Adsorption ◽  
Non Destructive

Hydrogen isotherms on a variety of single-walled carbon nanotube (SWNT) samples were measured using a differential pressure adsorption apparatus, which provides highly accurate data. A number of these SWNT samples were modified by a non-destructive cutting process, which reduced the aspect ratio of the nanotube bundles by two orders of magnitude. There were no apparent differences in the microporosity of SWNT as a function of aspect ratio. The adsorption of helium on SWNT is shown to be non-negligible and results in artificially low hydrogen capacities using conventional adsorption methodology. With no accounting for helium adsorption, the hydrogen adsorption results show that cut and uncut SWNT have similar hydrogen capacities of <1 wt% at 25 °C and pressures up to 110 bar. However, an analysis of hydrogen capacity versus N2 Brunauer–Emmett–Teller surface area suggests that there is an enhanced heat of adsorption of hydrogen for SWNT versus activated carbon.

Model Nanoporous Supramolecular Structures Based on Carbon Nanotubes and Hydrocarbons for Methane and Hydrogen Adsorption

2018 ◽  
Vol 80 (6) ◽  
pp. 739-750 ◽  
Author(s):  
A. V. Shkolin ◽  
A. A. Fomkin ◽  
V. Yu. Yakovlev ◽  
I. E. Men’shchikov
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Adsorption ◽  
Supramolecular Structures

Hydrogen adsorption in defected carbon nanotubes

Adsorption ◽  
2007 ◽  
Vol 13 (1) ◽  
pp. 53-59 ◽  
Author(s):  
V. Gayathri ◽  
R. Geetha
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Adsorption
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