An Inexpensive, Widely Available Material for 4 wt % Reversible Hydrogen Storage Near Room Temperature

Theoretical study of hydrogen storage in binary hydrogen-methane clathrate hydrates

“…Recently, it was shown using a molecular dynamics simulation that hydrogen does not completely diffuse out the ice structure. 17 Recently, the conceptual design of an underground hydrogen storage facility using a clathrate hydrate for large-scale stationary storage in an urban or industrial area was proposed. 49,50 The different technologies for large-scale storage in urban or industrial-complexes areas were examined focusing on the facility-construction costs, the utility expense, and the ground area required for the facility for each technology.…”

“…% and 42 g l À1 at 150 K, maintaining this level of hydrogen at 270 K and then releasing upon heating by a few degrees Kelvin. 17 The second research direction is the realization of hydrate structures at lower pressure conditions by adding a second guest component to the hydrogen-water system. 11 The first example of significant reduction in the hydrate formation pressure was found for the binary H 2 þ tetrahydrofuran (THF) hydrate.…”

“…Ethane and methane were used as second guest molecules (X) in the binary H 2 þ X mixed hydrate. [16][17][18][19][20] These experimental studies have reported different results for hydrogen enclathration into the hydrate cavities. For the small cavities occupation varied between zero 19,21 to single or even double in a limited number of cavities.…”

Reversible Interpenetration in a Metal–Organic Framework Triggered by Ligand Removal and Addition

“…Interpenetration is known for the structures of many minerals and ice; [1] most notably for ice, it exists in doubly interpenetrating (VI, VII, and VIII) and non-interpenetrating (I h ) forms with the latter being porous and having nearly half of the density of the former. [2] In synthetic materials, specifically in metal-organic frameworks (MOFs), interpenetration is generally considered undesirable because it reduces porosity. [3] However, on the contrary, many advantageous properties also arise when MOFs are interpenetrated, such as selective guest capture, [3a] stepwise gas adsorption, [4e] enhanced framework robustness, [5] photoluminescence control, [6] and guest-responsive porosity.…”

Permeation of Light Gases through Hexagonal Ice

“…The hexagonal ice sample size (around 7 × 10 −3 µL) is too small to measure gas sorption uptake. Neverthless, adsorption isotherms of light gases, such as H 2 , N 2 and CO 2 in hexagonal ice, were already reported in the literature [35,36]. …”