4 results about "Hydrogen density" patented technology

This invention discloses a high-hydrogen-density liquid organic hydrogen carrier and its applications, belonging to the field of hydrogen energy storage and utilization technology. The liquid organic hydrogen carrier is a composite system of a functionalized nitrogen-containing heterocyclic compound and a metal-organic framework material supported on a non-precious metal catalyst. The nitrogen-containing heterocyclic framework is connected with electron-donating and electron-withdrawing groups, constructing an intramolecular electron push-pull system. The non-precious metal catalyst is supported inside the pores or on the surface of the metal-organic framework material. Through molecular structure design and catalyst system optimization, this invention achieves a hydrogen storage density of not less than 7.0 wt%, a dehydrogenation onset temperature of not more than 150℃, and a dehydrogenated hydrogen purity of not less than 99.99%, with excellent cycle stability and low catalyst cost. This liquid organic hydrogen carrier can be widely used in renewable energy storage, long-distance hydrogen transportation, vehicle-mounted hydrogen sources, and distributed energy supply systems.

This invention relates to a method and system for calculating and compensating the State of Charge (SOC) of a hydrogen storage system. The invention includes: real-time acquisition of the pressure and temperature of hydrogen gas within the storage container; correction of the pressure based on the pressure and temperature to obtain a standard pressure at 20°C; calculation of the initial SOC value using the pressure-temperature method based on the 20°C standard pressure; acquisition of the heat transfer coefficient, heat exchange area, real-time hydrogen storage mass, and hydrogen specific heat capacity at constant pressure within the storage container, and calculation of a thermal effect compensation coefficient based on the pressure change rate and temperature change rate; thermal effect compensation of the initial SOC value based on the thermal effect compensation coefficient to obtain a thermally compensated SOC value; correction of the hydrogen density based on the second virial coefficient of hydrogen, the real-time absolute pressure within the storage cylinder, and the real-time thermodynamic temperature to obtain a density correction coefficient; and correction of the thermally compensated SOC value based on the density correction coefficient to obtain the final SOC value. This invention improves the accuracy and stability of SOC calculation for hydrogen storage systems.

The application discloses a hydrogen and electricity system with multiple solid-state hydrogen storage materials coupling for super-high quality hydrogen storage density, and belongs to the technical field of hydrogen and electricity. The hydrogen and electricity system comprises a solid-state hydrogen storage system, a fuel cell stack and a modular solid-state hydrogen storage unit which are arranged in the solid-state hydrogen storage system, the modular solid-state hydrogen storage unit comprises a first hydrogen storage unit (a solid-state hydrogen storage material pyrolysis unit) and a second hydrogen storage unit (a solid-state hydrogen storage material hydrolysis unit) which are arranged in the first hydrogen storage unit; hydrogen outlets of the first hydrogen storage unit and the second hydrogen storage unit are connected to a hydrogen inlet of the fuel cell stack through a pipeline and a third hydrogen storage unit; and an anode tail gas outlet of the fuel cell stack is connected to a water inlet of the second hydrogen storage unit through a pipeline. The application adopts a coupling method to realize integrated design of hydrogen production by pyrolysis of solid-state hydrogen storage material, hydrogen production by hydrolysis and a fuel cell power generation system, realizes efficient utilization and release of water, heat and electricity, and realizes a hydrogen and electricity system solution with super-high energy density.

The application belongs to the technical field of hydrogen energy, and particularly relates to a hydrogen supply system applied to a hydrogen refueling station, comprising: a cascade buffer storage system, comprising at least one cascade buffer storage tank and a hydrogen refueling machine corresponding to the cascade buffer storage tank; and an upstream gaseous hydrogen supply link and a liquid hydrogen supply link. The capacity of the cascade buffer storage tank is calculated according to the hydrogen density at the maximum and minimum pressures obtained by fitting a non-ideal gas model according to a preset maximum hydrogen refueling demand amount for a single time; and the compressor in the gaseous hydrogen supply link and the vaporizer in the liquid hydrogen supply link are both calculated according to the equivalent hydrogen peak flow calculated according to the preset maximum hydrogen refueling demand amount for a single time. The application effectively improves the hydrogen supply stability, equipment utilization rate and operation economy of the hydrogen refueling station in multiple scenarios by constructing a redundant architecture for parallel supply of gaseous hydrogen and liquid hydrogen and reasonably configuring the key components.