A method of controlling purging in a hydrogen storage system includes determining the internal hydrogen purity of a hydrogen tank and adjusting a hydrogen purging cycle of the hydrogen tank depending on the determined internal hydrogen purity. An apparatus for controlling purging in a hydrogen storage system is also provided.

A bayonet coupling system includes a bayonet, a bayonet coupler, and a seal. The bayonet includes a bayonet tube configured to enable the flow of hydrogen fuel therethrough, and a flange coupled to the bayonet tube. The seal is configured to surround the bayonet tube and contact the flange along one side of the flange. The bayonet coupler includes a bayonet coupler tube having an inside diameter larger than an outside diameter of the bayonet tube, the bayonet coupler tube configured to receive the bayonet tube and to seal against the flange at the seal. The bayonet coupler is fixedly mounted directly or indirectly to a hydrogen storage tank such that a longitudinal axis of the bayonet coupler is inclined a predetermined angle with respect to horizontal to prevent a substantial thermal gradient from forming at the seal.

The present invention relates to a liquefied gas treatment system in which a nitrogen control unit controls a content of nitrogen in a boil-off gas or a flash gas when a ratio of a nitrogen component of the flash gas is equal to or greater than a preset value. The efficiency of a boil-off gas compressor can be improved and the system can be stabilized by means of the nitrogen control unit.

Described are storage and dispensing systems and related methods, for the storage and selective dispensing germane a reagent gas from a vessel in which the reagent gas is held in sorptive relationship to a solid adsorbent medium at an interior of a storage vessel and wherein the methods and dispensing systems provide dispensing of the reagent gas from the storage vessel with a reduced level of atmospheric impurities contained in the dispensed reagent gas.

A method of processing biogas that includes obtaining a mobile tank containing biogas at a pressure greater than 1000 psig, connecting the mobile tank to a pressure let down system, and depressurizing the mobile tank to remove biogas therein. The depressurization includes removing gas from the mobile tank using the pressure let down system, and introducing a warming gas into the mobile tank.

An embodiment storage tank includes a liner configured to define a storage space in the storage tank, wherein the storage space is configured to accommodate a fluid, a composite material surrounding an outer side of the liner, and a catalyst disposed in the composite material, wherein, in a case in which the fluid is hydrogen gas, the catalyst is configured to decompose hydrogen molecules.

A method of processing biogas that includes obtaining a mobile tank containing biogas at a pressure greater than 1000 psig, connecting the mobile tank to a pressure let down system, and depressurizing the mobile tank to remove biogas therein. The depressurization includes removing gas from the mobile tank using the pressure let down system, and introducing a warming gas into the mobile tank.

The subject matter described herein relates to a method for filling fluid containers, in particular fluid containers for fuel cells The method includes: providing a pressure chamber having a pressure chamber interior; positioning a fluid container within the pressure chamber interior in such a manner that a holding space of the fluid container is fluidically connected to the pressure chamber interior; evacuating the pressure chamber interior up to a target negative pressure in such a manner that, due to the fluid coupling, a negative pressure difference initially forms in the pressure chamber interior with respect to the holding space; and filling the fluid container by introducing a fluid into the holding space.

The hydrogen compressing system has a first unit that receives hydrogen at low temperature and low pressure and compresses it, a second unit that cools down the hydrogen received from the first unit and a third unit that heats up and pressurizes the hydrogen received from the second unit; the high-pressure hydrogen is stored in a tank and afterwards may be supplied, for example, to a tank of a vehicle; pressurization at the third unit (300) is achieved by introducing cold hydrogen gas, well below ambient temperature, received from the second unit into the tank and heating it while the tank is closed preferably till when the hydrogen inside the tank reaches ambient temperature; heating-based compression allows to easily obtain high pressure through a relatively simple system and without risk of reducing the purity of the hydrogen.