Hydrogen-producing fuel rod, preparation method thereof, and hydrogen generator based on hydrogen-producing fuel rod

Abstract

The invention discloses a hydrogen-producing fuel rod, its preparation method and a hydrogen generator based on the hydrogen-producing fuel rod. The hydrogen-producing fuel rod is prepared from a solid alkaline metal borohydride, a catalyst and a hydrophilic porous medium material Formed, the hydrogen generator includes a shell, a top cover, a bottom cover, a gas-liquid separator, a liquid deflector, and a hydrogen-producing fuel rod; the fuel rod and the hydrogen reactor avoid the use of an alkaline metal borohydride solution At the same time, it is easy to carry and replace, and has high energy density.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage and hydrogen production, and relates to a hydrogen-producing fuel rod, a preparation method thereof and a hydrogen generator based on the hydrogen-producing fuel rod. Background technique [0002] Hydrogen production and hydrogen storage are the key technologies for fuel cell applications. At present, fuel cell power generation systems generally use compressed hydrogen storage or physical adsorption hydrogen storage. On the one hand, the above two methods do not solve the problem of hydrogen source, that is, hydrogen production; The mass hydrogen storage density achieved by the current technical level of the hydrogen storage method is limited, which is far lower than 10w%. Alkaline metal borohydride is a safe and environmentally friendly hydrogen-containing compound with a high theoretical mass hydrogen storage density. For example, the mass hydrogen storage density of sodium borohydride ...

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Problems solved by technology

This method has many disadvantages. First, the storage of the alkaline metal borohydride aqueous solution needs to be in a strongly alkaline environment, otherwise the alkaline metal borohydride will be hydrolyzed rapidly, and the strong alkali solution is easy to leak, and there are potential safety hazards; secondly, the alkaline metal borohydride The concentration of the borohydride solution should not be too high, so the energy density of the system is relatively low. For example, the aqueous solution of sodium borohydride at room temperature generally cannot exceed 15%, because sodium borohydride is hydrolyzed to form sodium metaborate, and sodium metaborate crystal hydrate is viscous. High, viscous fluids can easily block the surface of the catalyst, resulting in a decline in the catalytic effect of the catalyst, so that sodium borohydride cannot be completely reacted; third, as the hydrogen production reaction proceeds, the performance of the catalyst gradually decreases and eventually fails; fourth, the basic metal boron The hydride aqueous solution itself has the risk of leakage, requires a large storage space and has certain safety hazards

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