Time filter

Source Type

Nishi-Tokyo-shi, Japan

Nakayama T.,IHI Corporation | Tomura S.,IHI Plant Construction Co. | Ozaki M.,IHI Plant Construction Co. | Ohmura R.,Keio University | Mori Y.H.,Keio University
Energy and Fuels | Year: 2010

This paper describes a part of our feasibility study on the storage of hydrogen in the form of clathrate hydrates. The specific objective of this paper is to present conceptual designs of hydrogen-hydrate production plants applicable to large-scale in situ storage of hydrogen produced in an industrial complex area or to smaller-scale urban-area storage of hydrogen which is to be transported from the industrial complex area by container trucks. The plants were so designed as to produce either a simple hydrogen hydrate under a pressure of 35 MPa and a temperature of 140 K or a mixed hydrogen + tetrahydrofuran hydrate under a pressure of 30 MPa and a temperature of 223 K. In either case, the rate of hydrogen uptake into the hydrates during their production in each plant was targeted for 3000 Nm3/h (for use in an industrial complex area) or 500 Nm3/h (for use in an urban area). For each type of plant, we have prepared a process flow diagram accompanied by material-balance, heat-balance, and machinery specifications. The energy consumption in plant operation has also been evaluated, assuming that the cool energy generated by adjacent LNG facilities may or may not be available for cooling the hydrate-forming assemblies in each plant. © 2010 American Chemical Society.

Ozaki M.,IHI Plant Construction Co. | Tomura S.,IHI Plant Construction Co. | Ohmura R.,Keio University | Mori Y.H.,Keio University
International Journal of Hydrogen Energy | Year: 2014

Different technologies possibly applicable for large-scale hydrogen storage in urban or industrial-complex areas have been comparatively evaluated, focusing on the facility-construction costs, the utility expense, and the ground area required for the facility for each technology. The specific technologies examined in this study are the storage in the form of compressed or liquefied gas, the storage using a metal hydride, and the storage using a clathrate hydrate. The common requirements for these technologies are the function of loading or unloading hydrogen gas at a rate up to 3000 Nm3/h and also the storage capacity of 6.48 × 106 Nm3 that enables continuous 90-day loading or unloading at the rate of 3000 Nm3/h. The storage using a clathrate hydrate is found to require the minimum ground area and, if the cool energy necessary for hydrate production is available from adjacent LNG facilities, the minimum annual depreciation + utility expense. © 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserver.

Discover hidden collaborations