Automatic hydrogen production method by using hydroboron composition

Abstract

The invention discloses a method for spontaneously producing hydrogen by utilizing a hydroboron composition. The method comprises the following steps: (1), hydroboron, an activating agent and a filling agent are respectively dried and crashed, and then uniformly mixed in a certain proportion to obtain the hydroboron composition; and (2), the hydroboron composition is added to water, so as to stably produce hydrogen. The composition proportion of the hydroboron composition is changed, or the proportion of the hydroboron composition and the water is changed, so as to control a hydrogen production speed. The method of the invention has the advantages of convenient operation and high controllability and stability during hydrogen production process, and can meet the requirements of stable hydrogen production and hydrogen supply on a small scale or a large scale on site.

Description

technical field [0001] The invention relates to the technical field of hydrogen energy, in particular to a method for producing hydrogen by spontaneous hydrolysis of a borohydride composition. Background technique [0002] Hydrogen is a very promising renewable clean energy. Compared with other energy sources, hydrogen energy has a very obvious advantage, because hydrogen has a high energy density, and the heat energy released by hydrogen per unit mass is three times that of gasoline. Moreover, the only product of the hydrogen-oxygen reaction is water, which does not negatively impact the environment. To realize the widespread use of hydrogen energy, two problems must first be solved: 1. On-site supply of hydrogen; 2. Storage and transportation of hydrogen. At present, the commonly used hydrogen production methods include electrolysis of water to produce hydrogen, fossil energy to produce hydrogen, biological hydrogen to produce hydrogen, hydrocarbon decomposition to produc...

AI Technical Summary

Problems solved by technology

To realize the widespread application of hydrogen energy, two problems must be solved first: 1. On-site supply of hydrogen; 2. Storage and transportation of hydrogen

In order to improve the hydrogen production effect, the catalyst is usually loaded on a substrate with a high specific surface area, but this method still has great limitations: 1. The process of loading the catalyst on the substrate is complicated, and at the same time, it will 2. The adhesion of the catalyst on the substrate is poor, because the hydrogen generated during the reaction will continuously impact the catalyst on the substrate, causing the catalyst to fall off from the substrate and affect the effect of the reaction ; 3. The borohydride solution needs to be stabilized with a strong base first, which is not only difficult in practical application, but also easily causes problems such as alkali climbing, adhesion, and corrosion; 4. The borohydride will continuously generate metaborate during the reaction process. For high-concentration borohydride solutions, with the continuous consumption of water during the hydrolysis reaction, metaborate will exist in the solution in the form of colloids. These colloids will cover the surface of the substrate, inhibit the catalytic effect of the catalyst, and make the reaction The rate decays quickly, making it difficult to achieve large-scale stable hydrogen production [E.Y.Marrero-Alfonso, et al., Int.J.Hydrogen Energy, 2007, 32, 4723-4730]

The present invention finds that sodium borohydride has a slow self-decomposition rate without additives

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