TWI633181B - Solid metal fuels manufacturing method - Google Patents

Abstract

The invention relates to a method for manufacturing a solid metal fuel, which comprises the steps of: a sodium metal solid having a purity of 99% or more and an aluminum metal powder having a purity of 99% or more in a ratio of a molar ratio of 0.9 to 1.1 in a vacuum or an inert gas. The mixture is mixed with a sodium-aluminum metal mixture, and the sodium-aluminum metal mixture is diced, weighed, and shaped into a desired shape; the paraffin is diluted or melted by an ester solvent directly extracted from petroleum, and diluted or melted. The paraffin wax is immersed or sprayed on the sodium aluminum metal mixture to form a coating layer having a film thickness of 30 μm or more; and a solid metal fuel is formed.

Description

Method for manufacturing solid metal fuel

The present invention relates to a method of producing a solid metal fuel, and more particularly to a method of manufacturing a metal fuel for reacting with water to produce hydrogen.

According to the rapid development of industry, although it has driven the economy and improved people's quality of life, it has also caused rapid consumption of energy such as coal, oil and natural gas. Since coal, oil and natural gas are unrenewable energy sources, experts point out that if alternative energy sources cannot be developed in real time, traditional fossil fuels will inevitably be used soon, and thus face the dilemma of energy shortage.

In addition, coal and petroleum are fossil mineral energy sources, so when burning, a large amount of particulate pollutants (such as aerosols and dusts, etc.) and gaseous pollutants (such as carbon dioxide, etc.) are generated in the air, and the above pollutants are not only It is the culprit causing the greenhouse effect and destroying the ozone layer, and it will cause acid rain, soil acidification, groundwater pollution and ecological pollution.

Therefore, green energy that can be recycled and does not produce pollutants has become the focus of development in all countries of the world. Among them, hydrogen (Hydrogen) is not only widely used, but also has a variety of preparation methods, and can be used as a fuel energy source for transportation vehicles or backup generators, and does not produce harmful environmental pollutants after combustion, especially microorganisms. Hydrogen produced in non-fossil fuels such as metal waste is more recyclable, and pollution-free waste affects the environment.

However, at present, there is still a problem of safety in the storage and transportation of hydrogen. Therefore, how to reduce the energy consumed during storage and transportation and improve storage efficiency and safety is the focus of the follow-up research and development of hydrogen energy technology. The use of metal fuel to generate hydrogen by reacting with water not only controls the rate of hydrogen generation, but also solves the problems of hydrogen storage and transportation. However, if the metal fuel with high activity is not well stored or encapsulated, it may react with the aqueous substance to cause a risk of burning or explosion.

Regarding the related case of the metal fuel for generating hydrogen, please refer to the Republic of China Publication No. 200500493, which discloses a "temporary inerting method of high chemically reactive metal and its chemical application", which is high in chemical reactivity. The metal body, mixture or alloy is coated with a solid long-chain organic compound on the highly chemically reactive metal and constitutes an inhibitory cladding in a protective atmosphere, so that the highly chemically reactive metal can be used as a metallizing agent and a reducing agent.

The Republic of China Announcement No. I370104 discloses a "structure, composition of a hydrogen-producing material and a method for producing hydrogen using the same", which is embedded in a metal body containing one of aluminum or magnesium, selected from tin, indium, A catalyst composed of a group consisting of gallium, lead, lithium, sodium, potassium, calcium, strontium, and barium allows the hydrogen-producing material to be mixed with an aqueous solution to generate hydrogen gas.

The Republic of China Announcement No. I371427 discloses a "solid hydrogen fuel having a polymer substrate and a method for producing the same", which is obtained by uniformly mixing a solid chemical hydride and a solid catalyst in a polymer substrate after pulverization and mixing. To produce a plastic solid hydrogen fuel, it can be stored in a container and added with a suitable liquid to produce a stable rate of hydrogen evolution.

The Chinese Patent Publication No. 102,923,654 discloses "a sustained-release controlled solid-state hydrogen release agent" which is an aluminum powder, sodium hydroxide or potassium hydroxide, and magnesium stearate, sodium hydantoin and potassium chloride. The mixed catalytic main input is made of aluminum powder, nickel powder, calcium powder, zinc powder, barium chloride, sodium chloride, potassium chloride, polyvinyl alcohol, toluene, ethyl acetate, fatty alcohol polyoxyethylene ether and The hydrogen-producing catalyst is prepared by mixing, drying and tableting in a catalytic solution made of water.

In view of the current method of generating hydrogen by directly reacting with water by metal fuel, there are still some problems such as poor hydrogen production rate and safety concerns of metal fuel storage and storage.

Therefore, the object of the present invention is to provide a method for preventing a solid metal fuel for hydrogen production from reacting with moisture in the air during storage, and capable of inputting an appropriate amount of water according to the demand when the demand for hydrogen is used. In order to achieve hydrogen production and control the efficiency of hydrogen reaction.

In order to achieve the foregoing, the present invention provides a method for producing a solid metal fuel for reacting with water to produce hydrogen, the step comprising: a sodium metal solid having a purity of 99% or more and an aluminum having a purity of 99% or more. The metal powder is mixed in a vacuum or inert gas atmosphere at a molar ratio of 0.9 to 1.1 to form a sodium aluminum metal mixture, and the sodium aluminum metal mixture is diced, weighed, and shaped into a desired shape; The paraffin wax is diluted or melted directly by the petroleum-derived ester solvent, and the diluted or melted paraffin wax is immersed or sprayed on the sodium aluminum metal mixture to form a coating layer having a film thickness of 30 μm or more; Solid metal fuel.

In this way, the solid metal fuel produced by the highly malleable sodium-aluminum metal mixture and paraffin can be made into different shapes according to the requirements of storage, placement or use, so as to constitute a safe and convenient storage and carrying solid metal fuel, and as The source of hydrogen fuel, and the use of solid metal fuel input or input speed to control the rate of hydrogen evolution reaction with water, in order to improve hydrogen production efficiency.

In order to make the reviewers aware of the techniques, means and effects of the present invention in order to achieve the objectives, the remainder of the present invention will be described in detail with reference to the drawings.

First, referring to Fig. 1, a flow chart of the present invention is a method of passing a sodium (Na) metal solid having a purity of 99% or more and an aluminum (Al) metal powder having a purity of 99% or more in a molar number. The ratio of 0.9 to 1.1 is mixed in a vacuum or an inert gas (such as argon or helium). Since the sodium (Na) metal solid is a soft and ductile metal, it is mixed with sodium. (Na) metal solid surface is added with aluminum (Al) metal powder, and aluminum (Al) metal powder is mixed in a sodium (Na) metal solid by twisting, and aluminum (Al) metal powder is added and laminated by repeated addition. The action enables the aluminum (Al) metal powder to be uniformly distributed and bonded to the sodium (Na) metal solid (step S1). After the sodium-aluminum metal mixture is mixed, the dicing and weighing operations are sequentially performed, and the mixture is molded into a round rod, a cone, a sphere, a sheet or a dendritic mixture by means of mold pressing or the like ( Step S2).

Next, the paraffin wax is diluted or melted by an ester solvent directly extracted from petroleum. In one embodiment of the present invention, the ester solvent is a grease such as a spotting oil, a liquid paraffin or a vaseline, and is diluted or melted. The paraffin wax is coated on the sodium aluminum metal mixture by immersion or spraying to form a coating layer having a film thickness of 30 μm or more (step S3), and the coating film thickness can be adjusted according to storage placement conditions. Since the solvent containing alcohols, ethers, alkenes, and alkanes can also dilute paraffin, the carbon (C), oxygen (O) element, and water absorbed from the atmosphere in the molecular chain of the above solvent The acid radicals remaining in the lipids may react with the sodium (Na) metal solids in the sodium aluminum metal mixture, thereby causing a change in the volume of the sodium aluminum metal mixture, so the present invention is selected to be free of cracked alcohols, An ether, an alkene or an alkane solvent, and an ester solvent directly extracted from petroleum as a solvent for diluting the paraffin wax for coating the sodium aluminum metal mixture; finally shaping a round rod, a cone, A solid metal fuel of various shapes such as a spherical shape, a sheet shape, or a dendritic shape (step S4).

In an embodiment of the present invention, the composition of the sodium aluminum metal mixture further comprises a salt powder having a purity of 99% or more, and the salt powder is adjusted according to an ambient temperature to be used by the solid metal fuel, and the proportion thereof is added to the sodium aluminum metal mixture. For example, when the solid metal fuel is used in the tropics, the heat generated by the chemical reaction can be absorbed by the salt powder added to the sodium aluminum metal mixture, and when the solid metal fuel is used in the high latitude cold country, the solid state is required. The heat generated by the chemical reaction of the metal fuel melts the frozen water, and at this time, the amount of the salt powder is reduced.

Since the solid metal fuel of the present invention is coated by the coating layer, it is possible to prevent the sodium metal (Na) and the aluminum metal (Al) from actively reacting with oxygen molecules, carbon molecules and moisture in the air during storage. Moreover, the solid metal fuel of the present invention can directly react into water and react with water to generate hydrogen gas after destroying the coating layer. It produces the following reaction between sodium metal (Na) and water (H ₂ O) in the sodium aluminum metal mixture: 2Na+2H ₂ O = 2NaOH + H ₂ to form an aqueous solution of sodium hydroxide (NaOH), and hydrogen (H ₂ ) is produced. The sodium hydroxide (NaOH) aqueous solution reacts with the aluminum metal (Al) in the sodium aluminum metal mixture to produce the following reaction: 2 NaOH + 2Al + 2H ₂ O = 2NaAlO ₂ + 3H ₂ and continuously releases hydrogen (H2), leaving sodium aluminate ( NaAlO ₂ ) residual liquid.

In this way, the solid metal fuel produced by the highly malleable sodium-aluminum metal mixture and paraffin can be made into different shapes according to the requirements of storage, placement or use, so as to constitute a safe and convenient storage and carrying solid metal fuel, and as The source of hydrogen fuel, and the use of solid metal fuel input or input speed to control the rate of hydrogen evolution reaction with water, in order to avoid the safety or cost of the hydrogen production rate is too fast or too slow.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. All changes and modifications that do not depart from the technical spirit of the present invention are covered by the scope of the present invention.

In summary, the present invention has indeed broken through the tradition and has improved and innovative creation content and can be specifically implemented, in accordance with the statutory requirements of the invention patent, and filed a patent application according to law, and requested the examination committee of the bureau to grant legal patent rights to encourage creation. To the sense of virtue.

Steps S1 to S4‧‧ of the present invention

Figure 1 is a flow chart of the present invention.

Claims (6)

A method for producing a solid metal fuel for reacting with water to produce hydrogen, the step comprising: a sodium metal solid having a purity of 99% or more and an aluminum metal powder having a purity of 99% or more in a molar ratio of 0.9~ a ratio of 1.1, mixed in a vacuum or an inert gas atmosphere to form a sodium aluminum metal mixture; the sodium aluminum metal mixture is diced, weighed and shaped into a desired shape; and passed through an ester solvent directly extracted from petroleum The paraffin wax is diluted or melted, and the diluted or melted paraffin wax is immersed or sprayed on the sodium aluminum metal mixture to form a coating layer having a film thickness of 30 μm or more; and formed into a solid metal fuel. The method for producing a solid metal fuel according to claim 1, wherein the sodium aluminum metal mixture further comprises a salt powder having a purity of 99% or more. The method of producing a solid metal fuel according to claim 1, wherein the inert gas is argon or helium. The method for producing a solid metal fuel according to claim 1, wherein the sodium aluminum metal mixture is formed into a mold through a mold. The method for producing a solid metal fuel according to claim 1, wherein the ester solvent is a grease which is directly extracted from petroleum, a liquid paraffin or a petrolatum. The method for producing a solid metal fuel according to claim 1, wherein the solid metal fuel is a round rod, a cone, a sphere, a sheet or a dendritic shape.