The energy is minimized that is required to lower the concentration of the high boiling point components (containing the poisoning substance for the dehydrogenation catalyst) contained in the hydrogenated aromatic compound produced by the hydrogenation of an aromatic compound. The hydrogenation system (2) for an aromatic compound comprises a hydrogenation reaction unit (11) for adding hydrogen to an aromatic compound by a hydrogenation reaction to produce a hydrogenated aromatic compound, a first separation unit (12) for separating a gas and a liquid component from a product of the hydrogenation reaction unit while maintaining a temperature of the product generally higher than a boiling point of the hydrogenated aromatic compound, and a second separation unit (13) for separating the hydrogenated aromatic compound from the gas component separated by the first separation unit.

The present invention discloses a dehydrogenation reaction system for a liquid hydrogen source material, comprising a storage device used for storing a liquid hydrogen source material and a liquid hydrogen storage carrier, a reaction still used for dehydrogenation of the liquid hydrogen source material, a gas-liquid separator used for separating the products, hydrogen and liquid hydrogen storage carrier which are generated after dehydrogenation of the liquid hydrogen source material, a buffer tank used for storing hydrogen, and a heating device used for heating the reaction still. The liquid hydrogen source material is input into the reaction still by means of a pump through an input pipe, dehydrogenation reaction of the liquid hydrogen source material is conducted in the reaction still, generated hydrogen is conveyed to the buffer tank, and the liquid hydrogen storage carrier generated after dehydrogenation is conveyed back to the storage device. The normal-pressure and temperature dehydrogenation system for the liquid hydrogen source material is used for dehydrogenation reaction of the liquid hydrogen source material, and generated hydrogen can be supplied to fuel cells or internal combustion engines to be converted into electric energy or mechanical energy so as to be applied to automobiles, emergency power supplies, large-scale energy storage, smart power grids, chemical engineering, pharmacy and other industrial and civil fields.

A hydrogen storage material in liquid form is provided. The liquid hydrogen storage comprises at least two different hydrogen storage components, each one of the components is selected from an unsaturated aromatic hydrocarbon or a heterocyclic unsaturated compound, and at least one of the hydrogen storage components is a low-melting-point compound whose melting point is lower than 80 DEG C.

The present disclosure relates to improved processes for the preparation of metal hydrides. The present disclosure also relates to metal hydrides, e.g., metal hydrides prepared by the processes described herein, that exhibit enhanced hydrogen storage capacity when used as hydrogen storage systems.

Provided is a process for economically preparing a graphene shell having a desired configuration which is applicable in various fields wherein in the process the thickness of the graphene shell can be controlled, and a graphene shell prepared by the process.

An electrochemical energy conversion and storage system includes an electrochemical energy conversion device, such as a fuel cell that is in fluid communication with a hydrogen or electrically regenerable organic liquid fuel and an oxidant, for receiving, catalyzing and electrochemically oxidizing at least a portion of the fuel to generate electricity, a thus partially oxidized liquid fuel, and water. The liquid fuel includes six-membered ring cyclic hydrocarbons with functional group substituents, wherein the ring hydrogens may undergo an electrochemical oxidative dehydrogenation to the corresponding aromatic molecules. Comprising ring-substituent functional groups may also be electrochemically oxidized now with a potential incorporation of oxygen thus providing an additional capacity for energy storage. The partially oxidized spent liquid fuel may be electrically regenerated in with now an input of electricity and water to the device, generating oxygen as a by-product. Alternatively, the recovered spent fuel may be conveyed to a facility where it is reconstituted by catalytic hydrogenation or electrochemical hydrogenation processes.

Systems and methods for selectively extracting hydrogen gas dissolved in oil are provided. In one embodiment, a system includes a selectively permeable membrane provided at a point of contact between oil and a sensor chamber. The selectively permeable membrane has a hydrogen specificity and a thickness selected to minimize detection of further gasses dissolved in the oil by a hydrogen gas sensor cross-sensitive to the further gasses. The selectively permeable membrane can include polyimide. The further gasses include carbon monoxide, acetylene, and ethylene. The system can include a further membrane and a porous metal disc. The porous metal disc is bound to the selectively permeable membrane by using the further membrane as an adhesive layer and by applying pressure and temperature. The porous metal disc supports the selectively permeable membrane and the further membrane against pressure of the oil when exposed to a vacuum. The further membrane includes fluorohydrocarbons.

Method of storing hydrogen by forming a first ionic liquid by inducing a borohydride in a second ionic liquid comprising a cation and an anion comprising borate, and forming the second ionic liquid by releasing the hydrogen out of the first ionic liquid by using water and/or a catalyst, which method is characterized in that the first and the second ionic liquid are both water miscible and the second ionic liquid is separated, particularly is salted out, from solution in water by adding a separation inducer; certain ionic liquids for storing and releasing hydrogen comprising a borohydride or for preparing a ionic liquid for storing and releasing hydrogen comprising a borate; and a process for preparing ionic liquids for storing and releasing hydrogen comprising a borohydride.

A hydrogenation system includes an organic carrier injection line for injecting an organic carrier comprising one or more selected from a liquid organic carrier, a non-liquid organic carrier, or combinations thereof to a formation location, and a catalyst injection line configured for injecting a catalyst to the formation location. The hydrogenation system is reacts the organic carrier, the catalyst, and a reactive hydrogen compound at a subsurface location, hydrogenate the organic carrier, and form a hydrogenated organic carrier. The formation location of the hydrogenation system is a subsurface environment, near-subsurface environment, a surface connected environment, or any combination thereof. A method for hydrogenation includes providing an organic carrier to a formation location, providing a catalyst to the formation location, and reacting the organic carrier, the catalyst, and a reactive hydrogen compound at the formation location, thereby forming a hydrogenated organic carrier.

The present invention relates to siloxane hydrogen carrier compounds and to a method for producing hydrogen from said siloxane hydrogen carrier compounds.