Hydrogen production composition and preparation method thereof, and method for preparing hydrogen

Abstract

The invention discloses a hydrogen production composition and a preparation method thereof, and a method for preparing hydrogen. The hydrogen production composition is formed by mixing a metal powder body, an activating agent and an additive, wherein the metal powder body is a mixture of one or more than two of aluminum powder, magnesium powder and zinc powder; the activating agent is a mixture of one or more than two of sodium chloride, potassium chloride and sodium fluoride; and the additive is a mixture of one or more of calcium hydroxide, barium hydroxide and calcium chloride. In the hydrogen production method, the hydrogen production quantity, the hydrogen production speed and / or the hydrogen production time are controlled by changing a composition proportion of the hydrogen production composition and / or changing a proportion of the hydrogen production composition to water. The hydrogen production composition is convenient to use and preserve, low in cost, and nontoxic and harmless; and on-site hydrogen supply and enduring hydrogen supply in which the hydrogen production quantity and the hydrogen production speed can be controlled can be realized.

Description

technical field [0001] The invention relates to the technical field of hydrogen energy, and mainly relates to a method for producing hydrogen by spontaneous hydrolysis of a metal powder 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. In particular, the advent of fuel cells and hydrogen engines that use hydrogen as a raw material has brought about a profound revolution in the automotive industry worldwide. 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...

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 the substrate with 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]

This formula requires a certain temperature to start, so an auxiliary heating device is required, and portable use is difficult