TY - JOUR
T1 - Hydrogen confinement in carbon nanopores
T2 - Extreme densification at ambient temperature
AU - Gallego, Nidia C.
AU - He, Lilin
AU - Saha, Dipendu
AU - Contescu, Cristian I.
AU - Melnichenko, Yuri B.
PY - 2011/9/7
Y1 - 2011/9/7
N2 - In-situ small-angle neutron scattering studies of H2 confined in small pores of polyfurfuryl alcohol-derived activated carbon at room temperature have provided for the first time its phase behavior in equilibrium with external H2 at pressures up to 200 bar. The data were used to evaluate the density of the adsorbed fluid, which appears to be a function of both pore size and pressure and is comparable to the density of liquid H 2 in narrow nanopores at ∼200 bar. The surface-molecule interactions responsible for densification of H2 within the pores create internal pressures that exceed the external gas pressure by a factor of up to ∼50, confirming the benefits of adsorptive storage over compressive storage. These results can be used to guide the development of new carbon adsorbents tailored for maximum H2 storage capacities at near-ambient temperatures.
AB - In-situ small-angle neutron scattering studies of H2 confined in small pores of polyfurfuryl alcohol-derived activated carbon at room temperature have provided for the first time its phase behavior in equilibrium with external H2 at pressures up to 200 bar. The data were used to evaluate the density of the adsorbed fluid, which appears to be a function of both pore size and pressure and is comparable to the density of liquid H 2 in narrow nanopores at ∼200 bar. The surface-molecule interactions responsible for densification of H2 within the pores create internal pressures that exceed the external gas pressure by a factor of up to ∼50, confirming the benefits of adsorptive storage over compressive storage. These results can be used to guide the development of new carbon adsorbents tailored for maximum H2 storage capacities at near-ambient temperatures.
UR - http://www.scopus.com/inward/record.url?scp=80052336730&partnerID=8YFLogxK
U2 - 10.1021/ja202432x
DO - 10.1021/ja202432x
M3 - Article
AN - SCOPUS:80052336730
SN - 0002-7863
VL - 133
SP - 13794
EP - 13797
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 35
ER -