Journal ArticleDOI
Tuning clathrate hydrates for hydrogen storage
Huen Lee,Jongwon Lee,Do Youn Kim,Jeasung Park,Yutaek Seo,Huang Zeng,Igor L. Moudrakovski,Christopher I. Ratcliffe,John A. Ripmeester +8 more
Reads0
Chats0
TLDR
Hydrogen storage capacities in THF-containing binary-clathrate hydrates can be increased to ∼4 wt% at modest pressures by tuning their composition to allow the hydrogen guests to enter both the larger and the smaller cages, while retaining low-pressure stability.Abstract:
The storage of large quantities of hydrogen at safe pressures is a key factor in establishing a hydrogen-based economy. Previous strategies--where hydrogen has been bound chemically, adsorbed in materials with permanent void space or stored in hybrid materials that combine these elements--have problems arising from either technical considerations or materials cost. A recently reported clathrate hydrate of hydrogen exhibiting two different-sized cages does seem to meet the necessary storage requirements; however, the extreme pressures (approximately 2 kbar) required to produce the material make it impractical. The synthesis pressure can be decreased by filling the larger cavity with tetrahydrofuran (THF) to stabilize the material, but the potential storage capacity of the material is compromised with this approach. Here we report that hydrogen storage capacities in THF-containing binary-clathrate hydrates can be increased to approximately 4 wt% at modest pressures by tuning their composition to allow the hydrogen guests to enter both the larger and the smaller cages, while retaining low-pressure stability. The tuning mechanism is quite general and convenient, using water-soluble hydrate promoters and various small gaseous guests.read more
Citations
More filters
Journal ArticleDOI
The effect of hydrate promoters on gas uptake.
TL;DR: The results indicate that the effect of the hydrate promoter on the gas uptake depends on the physical and chemical properties of the promoter and gas.
Journal ArticleDOI
Progress and trends in hydrate based desalination (HBD) technology: A review
TL;DR: In this article, the experimental progress at the aspects of the hydrate former choice, formation promotion and ion removal efficiency and conceptive innovation of hydrate separation and energy utilization is discussed.
Journal ArticleDOI
Novel Nanostructured Media for Gas Storage and Transport: Clathrate Hydrates of Methane and Hydrogen
TL;DR: In this paper, a preliminary attempt to relate the structural features of several amphiphilic additives to the kinetic and thermodynamic parameters of methane hydrate formation was made, with a goal to render hydrate forming conditions milder, and increase the concentration of gas within the CH.
Journal ArticleDOI
Enhancement of hydrogen storage capacity in hydrate lattices
TL;DR: In this article, it was shown that the gas phase pentagonal dodecahedron (H2O)20 (D-cage) and tetrakaidecaidecahedral (T-cages) can accommodate up to a maximum of 5 and 7 guest hydrogen molecules, respectively.
Journal ArticleDOI
Hydrogen in porous tetrahydrofuran clathrate hydrate.
TL;DR: In situ neutron diffraction is applied to show that the clathrate hydrate takes up hydrogen rapidly at pressures between 60 and 90 bar (at about 270 K) and at temperatures above approximately 220 K, the H-storage characteristics have similarities with those of surface-adsorption materials, but at lower temperatures, the adsorption rates slow down because of reduced D(2) diffusion between the small cages.
References
More filters
Book
Infrared and Raman Spectra of Inorganic and Coordination Compounds
TL;DR: In this article, the normal modes of vibration are illustrated and corresponding vibrational frequencies are listed for each type, including diatomic, triatomic, fouratomic, five-atomic, six-atomic and seven-atomic types.
Journal ArticleDOI
Hydrogen-storage materials for mobile applications
TL;DR: Recent developments in the search for innovative materials with high hydrogen-storage capacity are presented.
Journal ArticleDOI
Hydrogen Storage in Microporous Metal-Organic Frameworks
Nathaniel L. Rosi,Juergen Eckert,Mohamed Eddaoudi,David T. Vodak,Jaheon Kim,Michael O'Keeffe,Omar M. Yaghi +6 more
TL;DR: Inelastic neutron scattering spectroscopy of the rotational transitions of the adsorbed hydrogen molecules indicates the presence of two well-defined binding sites (termed I and II), which are associated with hydrogen binding to zinc and the BDC linker, respectively.
Book
Comprehensive Supramolecular Chemistry
Jerry L. Atwood,Jean-Marie Lehn +1 more
TL;DR: The aim of this book is to provide a history of Supramolecular Chemistry from its inception in the 1920s to the present day, with a focus on the period between 1950 and 1983.
Journal ArticleDOI
Hydrogen clusters in clathrate hydrate.
Wendy L. Mao,Wendy L. Mao,Ho-kwang Mao,Alexander F. Goncharov,Viktor V. Struzhkin,Quanzhong Guo,J. Z. Hu,Jinfu Shu,Russell J. Hemley,Maddury Somayazulu,Yusheng Zhao +10 more
TL;DR: High-pressure Raman, infrared, x-ray, and neutron studies show that H2 and H2O mixtures crystallize into the sII clathrate structure with an approximate H2/H2Omolar ratio of 1:2.