47results about How to "Improved hydrogen release performance" patented technology

The invention discloses a hydrogen storage tank with an external heat exchanging structure, and belongs to the hydrogen storage technical field of the hydrogen energy field. The hydrogen storage tank comprises the following structure: a skirt support is disposed at the bottom of a tank body; a hydrogen storage material bed is disposed in the tank body; a gas guide tube is disposed at the center position in the tank body and pass straight through the tank mouth from the tank bottom; a filter is installed in the tank mouth, and a hydrogen cylinder valve is installed at the external of the tank mouth; a housing is disposed at the external of the tank body, two ends of the housing are respectively provided with a heat conduction liquid inlet and a heat conduction liquid outlet; and a heat exchanging structure is arranged in an annular chamber between the housing and the tank body. The heat exchanging structure is in the shape of a straight flow, a winding flow, a single spiral or multiple spirals, and the hydrogen storage material bed is a uniform mixed body of a hydrogen storage material and heat conduction fiber. The provided hydrogen storage tank is simple in structure, easy for preparation and processing, and low in cost. Compared with conventional hydrogen storage tanks, the hydrogen storage tank provided by the invention has relatively excellent heat exchanging effect and relatively excellent hydrogen desorption performance.

The invention relates to a Mg(BH4)2-xCNTs system hydrogen storage material and a preparation method thereof, and belongs to the technical field of a hydrogen storage material for a fuel battery. The preparation method comprises the following steps: a material mixing step: performing mixing treatment on a Mg(BH4)2 powder and CNTs according to a certain proportion to obtain a uniform mixture; and ahigh-energy ball-milling step: putting the mixture obtained in the material mixing step into a ball-milling tank and performing high-energy ball-milling treatment to obtain the Mg(BH4)2-xCNTs system hydrogen storage material. The raw materials in the preparation method are commercialized products and are easy to purchase, the raw materials are subjected to mechanical alloying by a high-energy ball-milling process, and the preparation process is simple and convenient to operate; the prepared products are mainly CNTs and Mg(BH4)2 phases, the granules have regular shapes, the size is nanometer and uniform, and the initial hydrogen discharge temperature is low; and rapid hydrogen discharge kinetic performance is achieved and the reversible performance is improved.

The invention discloses a water bath heat exchange type hydrogen storage device for a hydrogen kinetic energy engine vehicle, comprising: an alloy hydrogen storage tank, a plurality of elongated heat exchange fins fixed on the outer wall of the alloy hydrogen storage tank, The length direction is the same as the axial direction of the alloy hydrogen storage tank; the outer shell, the outer shell is equipped with a hydrogen storage room and the air cooling room; the inner shell is fixedly installed in the hydrogen storage room; the heat exchange shell is equipped with several mutual A connected heat exchange chamber, an alloy hydrogen storage tank is installed in the heat exchange chamber; and a water bath circulation heat exchange mechanism, a door sealing mechanism, a driving mechanism and a sealing cover. The invention adopts circulating water cooling method to cool and exchange the alloy hydrogen storage tank during hydrogen charging, so as to improve the heat dissipation rate and hydrogen absorption rate of the hydrogen storage tank; to heat the alloy hydrogen storage tank during hydrogen discharge, so as to improve the hydrogen storage capacity of the alloy. The heat absorption rate and hydrogen release rate of the tank ensure uniform heat exchange, which helps to improve the energy efficiency and output power of the entire hydrogen kinetic energy engine system.

The invention discloses an ammonia borane / magnesium hydride / heat conduction agent compound hydrogen storage material. The material is composed of magnesium hydride, a heat conduction agent, and ammonia borane subjected to partial phase change after being placed at room temperature for six months or more or thermally treated for 10-30 min, wherein the molar ratio of ammonia borane to magnesium hydride is 2:(0.8-1), and the mass of the heat conduction agent is 5-30 wt% of the sum of the mass of ammonia borane and that of magnesium hydride. The invention further provides preparing and hydrogen desorption methods of the compound hydrogen storage material. Through combination of component optimization and hydrogen desorption condition control, high-capacity hydrogen desorption of the compound hydrogen storage material under the low-temperature condition is well achieved, and then application requirements are met. Commercial application in the fields such as hydrogen refueling stations, hydrogen cell automobiles and mobile hydrogen sources can be achieved. Therefore, the ammonia borane / magnesium hydride / heat conduction agent compound hydrogen storage material has high practical value and popularization value.