Hydrogen manufacturing device and hydrogen manufacturing method

Abstract

This hydrogen manufacturing device may comprise: a first reactor comprising a first reaction tank for accommodating a first waste acid and a first waste metal; a second reactor comprising a second reaction tank for accommodating a second waste acid and a second waste metal, the second reaction tank being disposed such that the second waste acid in the second reaction tank is heated by the heat generated in the first reaction tank; and a hydrogen storage device connected to each of the first reaction tank and the second reaction tank so as to store the hydrogen generated in the first reactor and the second reactor.

Description

Hydrogen production device and hydrogen production method

[0001] The present disclosure relates to a hydrogen production device and a hydrogen production method, and more particularly, to a device and a hydrogen production method for producing hydrogen using waste acid and waste metal.

[0002] In the case of hydrogen production, hydrogen is generally produced through a catalytic reaction using hydrocarbon fossil fuels such as natural gas, coal, and oil, or through electrolysis of deionized water and alkaline water.

[0003] One aspect of the present disclosure may provide a hydrogen production device and a hydrogen production method.

[0004] The problems to be solved by the present invention are not limited to the problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0005] A hydrogen production device according to one aspect of the present disclosure includes a first reactor including a first reactor configured to receive a first waste acid and a first waste metal, a second reactor configured to receive a second waste acid and a second waste metal, and the second reactor may include a second reactor arranged such that the second waste acid in the second reactor is heated by heat generated in the first reactor, and a hydrogen storage device connected to the first reactor and the second reactor, respectively, to store hydrogen generated in the first reactor and the second reactor.

[0006] A method for producing hydrogen according to one aspect of the present disclosure may include generating hydrogen by exothermically reacting a first waste acid and a first waste metal in a first reactor, transferring heat generated from the exotherm reaction to a second reactor, generating hydrogen by reacting a second waste acid and a second waste metal in the second reactor, and collecting and storing the hydrogen generated in the first reactor and the hydrogen generated in the second reactor.

[0007] According to the idea of ​​the present disclosure, high-purity hydrogen can be produced in an environmentally friendly and economical manner by utilizing waste acid and waste metal, and the heat generated in the first reactor (5) can be transferred to the second reactor (6) to produce hydrogen, thereby increasing the efficiency of hydrogen production. In addition, hydrogen can be produced and collected in each reactor, thereby enabling mass production of high-purity hydrogen.

[0008] In addition, according to the idea of ​​the present disclosure, it may include generating hydrogen by exothermic reaction between the first waste acid (7) and the first waste metal (9) in the first reactor (5), transferring the heat generated from the exothermic reaction to the second reactor (6), generating hydrogen by reacting the second waste acid (8) and the second waste metal (10) in the second reactor (6), and collecting and storing the hydrogen generated in the first reactor (5) and the hydrogen generated in the second reactor (6).

[0009] According to the idea of ​​the present disclosure, an environmentally friendly hydrogen production method capable of producing electricity without emitting carbon can solve the problems of the conventional hydrogen production method through reforming of hydrocarbon-based fossil fuels, which is not environmentally friendly due to carbon dioxide production, and the hydrogen production method through electrolysis of alkaline water and deionized water, which requires high production costs due to high electricity consumption costs.

[0010] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure belongs from the description below.

[0011] FIG. 1 is a drawing showing a hydrogen production device according to one embodiment of the present invention.

[0012] FIG. 2 is a drawing showing a hydrogen production device according to another embodiment of the present invention.

[0013] FIG. 3 is a drawing showing a hydrogen production device according to another embodiment of the present invention.

[0014] Figure 4 is a flowchart showing a hydrogen production method according to one embodiment of the present invention.

[0015] It should be understood that the various embodiments and terms used in this document are not intended to limit the technical features described in this document to specific embodiments, but rather to include various modifications, equivalents, or substitutes of the embodiments.

[0016] In connection with the description of the drawings, similar reference numerals may be used for similar or related components.

[0017] The singular form of a noun corresponding to an item may include one or more of said items, unless the relevant context clearly indicates otherwise.

[0018] In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof.

[0019] The term "and / or" includes any combination of a plurality of related described elements or any one of a plurality of related described elements.

[0020] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish one component from another and do not qualify the components in any other respect (e.g., importance or order).

[0021] When a component (e.g., a first component) is referred to as being "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0022] The terms "include" or "have" are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in this document, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0023] When a component is said to be “connected,” “coupled,” “supported,” or “in contact with” another component, this includes not only cases where the components are directly connected, coupled, supported, or in contact, but also cases where the components are indirectly connected, coupled, supported, or in contact through a third component.

[0024] When we say that a component is "on" another component, this includes not only cases where the component is in contact with the other component, but also cases where there is another component between the two components.

[0025] The hydrogen production device and hydrogen production method are described in detail with reference to the attached drawings below.

[0026] A hydrogen production device (1) according to one embodiment of the present invention includes a first reactor (2) including a first reaction tank (5) provided to receive a first waste acid (7) and a first waste metal (9), a second reaction tank (6) provided to receive a second waste acid (8) and a second waste metal (10), and the second reaction tank (6) may include a second reactor (3) arranged so that the second waste acid (8) in the second reaction tank (6) is heated by heat generated in the first reaction tank (5), and a hydrogen storage device (4) connected to the first reaction tank (5) and the second reaction tank (6) respectively to store hydrogen generated in the first reactor (2) and the second reactor (3).

[0027] FIG. 1 is a drawing showing a hydrogen production device (1) according to one embodiment of the present invention. Referring to FIG. 1, the hydrogen production device (1) according to one embodiment of the present invention may be arranged such that the second reaction tank (6) is disposed inside the first reaction tank (5). According to one embodiment of the present invention, the first waste acid (7) and the first waste metal (9) of the first reaction tank (5) can produce hydrogen through an exothermic reaction, and in the case of the second reaction tank (6), the heat generated in the first reaction tank (5) is directly transferred to improve the reaction efficiency when producing hydrogen from the second waste acid (8) and the second waste metal (10). In the present invention, a structure in which one reaction tank is disposed inside another reaction tank may be used interchangeably with a double jacket structure or a double jacket structure.

[0028] Fig. 2 is a drawing showing a hydrogen production device (1) according to another embodiment of the present invention. Referring to Fig. 2, the hydrogen production device (1) according to one embodiment of the present invention may be arranged such that the first reaction tank (5) is placed inside the second reaction tank (6).

[0029] According to one embodiment of the present invention, the first waste acid (7) and the first waste metal (9) of the first reactor (5) can produce hydrogen through an exothermic reaction, and in the case of the second reactor (6), the heat generated in the first reactor (5) can be directly transferred with high efficiency, thereby further improving the reaction efficiency when producing hydrogen from the second waste acid (8) and the second waste metal (10). In the present invention, the possibility of direct heat transfer may mean that heat transfer through conduction is possible between the reactor and the waste acid, rather than through convection through air.

[0030] Fig. 3 is a drawing showing a hydrogen production device (1) according to another embodiment of the present invention. Referring to Fig. 3, in the hydrogen production device (1) according to one embodiment of the present invention, the first reaction tank (5) can be provided outside the second reaction tank (6).

[0031] According to one embodiment of the present invention, the first waste acid (7) and the first waste metal (9) of the first reactor (5) can produce hydrogen through an exothermic reaction, and the second reactor (6) provided separately from the first reactor (5) can receive the heat generated in the first reactor (5) to improve the reaction efficiency when producing hydrogen from the second waste acid (8) and the second waste metal (10). At this time, the method by which the first reactor (5) transfers the heat to the second reactor (6) is not particularly limited, and for example, the heat can be transferred by bringing the first reactor (5) and the second reactor (6) into contact so that the heat is directly transferred, by using the reaction heat generated from the first reactor (5) to generate steam or a heat source and then transferring it to the second reactor (6), or by indirectly transferring the heat by arranging a heat exchanger between the first reactor (5) and the second reactor (6). However, in the present invention, the number of reactors, reaction tanks, waste acids or waste metals is not limited to the above, and several reactors, reaction tanks, waste acids or waste metals may be provided within a range that can achieve the purpose of the present invention.

[0032] According to a hydrogen production device (1) according to one embodiment of the present invention, a first reactor (2) may be provided with a first reaction tank (5) configured to receive a first waste acid (7) and a first waste metal (9), and a second reactor (3) may be provided with a second reaction tank (6) configured to receive a second waste acid (8) and a second waste metal (10), so that not only can the waste acid and the waste metal be reacted in each of the reaction tanks to produce hydrogen, but also heat generated from the exothermic reaction of the first waste acid (7) and the first waste metal (9) in the first reaction tank (5) can be transferred to the second reaction tank (6) and utilized for the reaction of the second waste acid (8) and the second waste metal (10), thereby improving the efficiency of hydrogen production, and hydrogen produced in the first reaction tank (5) and hydrogen produced in the second reaction tank (6) can be collected and stored, respectively, so that mass production of hydrogen is possible.

[0033] In addition, the first waste acid (7) and the second waste acid (8) may be waste acids generated from an anodizing process, and the first waste metal (9) and the second waste metal (10) may be metal wastes such as aluminum, magnesium, and zinc materials used in mobile phones, laptops, various machines, construction equipment, etc., such as plates and die castings, which may be utilized as waste metals in the treatment process of the present invention. Therefore, according to the hydrogen production device (1) according to one embodiment of the present invention, high-purity hydrogen can be produced in an environmentally friendly and economical manner by utilizing waste metals contained in the waste acid and metal waste generated in the anodizing process as described above.

[0034] In general, anodizing refers to the phenomenon in which an oxide film with great adhesion to the base metal is formed by oxygen generated at the anode when metal or parts are placed on the anode and electrolyzed in a dilute acid electrolyte. The term anodic oxidation is a compound word of anode and oxidation (Ano-dizing).

[0035] In addition, the hydrogen production device (1) according to one embodiment of the present invention may include at least one of nitric acid, phosphoric acid, or sulfuric acid in the first waste acid (7) and the second waste acid (8), and may include at least one of aluminum, magnesium, zinc, or iron in the first waste metal (9) and the second waste metal (10).

[0036] The waste acids and waste metals used in the present invention are not limited to the types of waste acids and waste metals mentioned above, and various waste acids and combinations thereof generated in the anodizing process, as well as various waste metals contained in metal waste materials, can be used in the hydrogen production device (1) of the present invention. In addition, in the present invention, the waste metals may include, without limitation, die-casting scrap, frames, chips, and metal waste materials including some polymer compounds.

[0037] In addition, the hydrogen production device (1) according to one embodiment of the present invention comprises: the first spent acid (7) includes phosphoric acid in an amount of 30% to 90% by weight, sulfuric acid in an amount of 2% to 20% by weight, and the remainder water; the pH of the first spent acid (7) may be -0.2 to 4, preferably 0.1 to 0.5; the first spent metal (9) may include magnesium; the reaction temperature of the second reactor (6) is 50°C or higher; the second spent acid (8) includes sulfuric acid in an amount of 10% to 60% by weight, and the remainder water; the pH of the second spent acid (8) may be 0.3 to 4, preferably 0.5 to 1; and the second spent metal (10) may include aluminum. As described above, the hydrogen production efficiency of the hydrogen production device (1) can be improved by controlling the composition and content of the first waste acid (7) and the second waste acid (8), the pH, and the reaction temperature of the reaction tank.

[0038] In addition, the hydrogen production device (1) according to one embodiment of the present invention may be arranged so that the second reaction tank (6) further accommodates one or more of platinum, carbon, or titanium. In this way, a metal having a lower reactivity than the second waste metal (10) used for hydrogen production may be introduced into the second reaction tank (6) to promote galvanic corrosion of the second waste metal (10). At this time, galvanic corrosion may be induced by directly contacting the second waste metal (10) with a metal having a lower reactivity than the second waste metal (10), such as platinum, carbon, or titanium, or by connecting the second waste metal (10) with a conductor (14) that allows ion movement, but the present invention is not necessarily limited to this method, and various methods capable of promoting galvanic corrosion may be used. In addition, aluminum may be used as the second waste metal (10), and in this case, an oxide film that inhibits the solubility of aluminum may be formed on the surface of the aluminum. Accordingly, a metal having a lower ionization tendency than aluminum can be provided in the second reactor (6) to induce galvanic corrosion, thereby removing the surface oxide film of aluminum and improving the reactivity of the second waste metal (10) with the second waste acid (8).

[0039] In the present invention, a redox reaction occurs through the exchange of electrons between reactants. Oxidation refers to the loss of electrons, while reduction refers to the gain of electrons. Different metals have different tendencies to lose electrons and become oxidized. This is referred to as metal reactivity, and a comparison of the reactivity of representative metals is as follows.

[0040] K > Ca > Na > Mg > Al > Ti > Zn > Fe > Ni > Sn > Pb > H > Cu > Hg > Ag > Pt > Au

[0041] Galvanic corrosion is also a type of corrosion that occurs when dissimilar metals come into contact, accelerating the oxidation of one metal. This corrosion process can be reversed and used to prevent corrosion, a process known as cathodic protection or cathodic protection.

[0042] As described above, when aluminum is used as the second waste metal (10), a metal such as titanium or platinum, which has a lower ionization tendency than aluminum, can be introduced into the second reaction tank (6) to induce oxidation of aluminum, thereby removing the oxide film formed on the surface of aluminum, thereby improving the reaction efficiency.

[0043] In addition, the hydrogen production device (1) according to one embodiment of the present invention may be provided so as to accommodate a galvanic cell (11) including an anode (12) including at least one of platinum, carbon, or titanium, a cathode (13) including aluminum, a conductor (14) connecting the anode (12) and the cathode (13), and an electronic device (15) connected to the conductor (14) and operable. The current generated by the potential difference caused by the galvanic corrosion may be used to drive the electronic device (15) through the conductor (14) or stored in the galvanic cell (11) to be utilized as energy.

[0044] In addition, the hydrogen production device (1) according to one embodiment of the present invention may further include a gas filter (16) for separating hydrogen from the hydrogen storage device (4). The purity of hydrogen produced in the first reaction tank (5) and the second reaction tank (6) may be increased through the gas filter (16). At this time, the gas filter (16) may include a water vapor removal filter, a nitrogen removal filter, or an oxygen removal filter, etc., to separate hydrogen from air and water vapor.

[0045] In addition, the hydrogen production device (1) according to one embodiment of the present invention may further include a filtration filter (17) for each of the first reactor (2) and the second reactor (3), and the filtration filter (17) may further include a primary filter (18) and a secondary filter (19) for additionally filtering the residue that has passed through the primary filter (18), and the primary filter (18) may have a mesh structure and a pore size of 30 to 50 meshes, and the secondary filter (19) may include a non-woven fabric, a woven fabric, or a knitted fabric, and may have a pore size of 5 ㎛ or more and 15 ㎛ or less.

[0046] As described above, by including a filtration filter (17) including a primary filter (18) and a secondary filter (19) in each of the first reactor (2) and the second reactor (3), by-products generated after the reaction to produce hydrogen can be filtered and stored as needed. That is, through the primary filtration filter (17), waste metals such as metal materials after the reaction and residual substances after the reaction can be prevented from flowing into the production vessel, and unnecessary residual substances can be additionally filtered through the secondary filtration filter (17), so that the filtered metal salt by-products can be utilized in an environmentally friendly and economical way for producing fertilizers, etc.

[0047] The hydrogen production device has been described above.

[0048] Hereinafter, a hydrogen production method according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

[0049] A method for producing hydrogen according to one embodiment of the present invention may include generating hydrogen by causing an exothermic reaction between a first waste acid (7) and a first waste metal (9) in a first reaction tank (5), transferring heat generated from the exothermic reaction to a second reaction tank (6), generating hydrogen by causing a second waste acid (8) and a second waste metal (10) to react in the second reaction tank (6), and collecting and storing the hydrogen generated in the first reaction tank (5) and the hydrogen generated in the second reaction tank (6).

[0050] According to one embodiment of the present invention, not only can hydrogen be produced in an environmentally friendly and economical manner by reacting waste acid and waste metal in each reaction tank, but also the heat generated from the exothermic reaction of the first waste acid (7) and the first waste metal (9) in the first reaction tank (5) can be transferred to the second reaction tank (6) and utilized for the reaction of the second waste acid (8) and the second waste metal (10), thereby improving the efficiency of hydrogen production, and hydrogen produced in the first reaction tank (5) and hydrogen produced in the second reaction tank (6) can be collected and stored, respectively, thereby enabling mass production of hydrogen.

[0051] In addition, the hydrogen production method according to one embodiment of the present invention may further include galvanically corroding the second waste metal (10) within the second reaction tank (6). Referring to FIG. 3, a metal having a lower ionization tendency than the second waste metal (10), such as platinum, may be connected to the second waste metal (10) to induce galvanic corrosion, thereby promoting oxidation of the second waste metal (10), thereby improving the hydrogen production efficiency of the second waste acid (8) and the second waste metal (10) within the second reaction tank (6). For example, aluminum and platinum may be connected within the second reaction tank (6) by a conductor (14), and at this time, an oxide film formed on the surface of aluminum may be removed by a redox reaction, and when the oxide film is removed, the reaction efficiency of aluminum and the second waste acid (8) may increase.

[0052] In addition, the hydrogen production method according to one embodiment of the present invention may further include generating energy through galvanic corrosion within the second reactor (6). FIG. 2 illustrates a galvanic cell (11) including an anode (12), a cathode (13), a conductor (14), and an electronic device (15) provided in the second reactor (6) according to one embodiment of the present invention.

[0053] According to one embodiment of the present invention, when a second waste metal (10) is installed at the cathode (13) and a metal having a lower ionization tendency than the second waste metal (10) is installed at the anode (12) and connected by a conductor (14) respectively and connected to an electronic device (15), an oxidation reaction occurs at the cathode (13) and a reduction reaction occurs at the anode (12), and the electrons generated through the reduction reaction move from the cathode (13) to the anode (12), and the electronic device (15) can be driven using the electric energy generated through the current generated. Here, the electronic device (15) may mean a device composed of an electronic device such as a electron tube, a transistor, or an integrated circuit that can be driven by applying voltage or current, and may be used in the same meaning as an electronic device or an electronic product.

[0054] In addition, in the hydrogen production method according to one embodiment of the present invention, the first waste acid (7) and the second waste acid (8) may include at least one of nitric acid, phosphoric acid, or sulfuric acid, and the first waste metal (9) and the second waste metal (10) may include at least one of aluminum, magnesium, zinc, or iron. However, as described above, the waste acid and waste metal used in the present invention are not limited to the types of the waste acid and waste metal, and various waste acids and combinations thereof generated in the anodizing process, and various waste metals included in metal waste materials may be used in the hydrogen production device (1) of the present invention. In addition, in the present invention, the waste metal may be, without limitation, die-casting scrap, frames, chips, metal waste materials including some polymer compounds, etc.

[0055] In addition, according to an embodiment of the present invention, a method for producing hydrogen may include the first waste metal (9) including magnesium, the second waste metal (10) including aluminum, the first waste acid (7) including phosphoric acid in an amount of 30% to 90% by weight, sulfuric acid in an amount of 2% to 20% by weight, and the remainder water, the second waste acid (8) including sulfuric acid in an amount of 10% to 60% by weight, and the remainder water, the pH of the first waste acid (7) may be -0.2 to 4, preferably 0.1 to 0.5, the reaction temperature of the second reactor (6) may be 50°C or higher, and the pH of the second waste acid (8) may be 0.3 to 4, preferably 0.5 to 1. According to an embodiment of the present invention, by controlling the concentration and pH of the waste acid and the reaction temperature according to the waste metal as described above, hydrogen production efficiency may be maximized, thereby promoting mass production of hydrogen.

[0056] In addition, the hydrogen production method according to one embodiment of the present invention may further include separating the stored hydrogen from water vapor and air, and the purity of the separated hydrogen may be 99% or more, preferably 99.9% or more. As described above, in the hydrogen separation, a gas filter (16) may be used that may include a water vapor removal filter, a nitrogen removal filter, or an oxygen removal filter, so as to separate hydrogen from air and water vapor, and the purity of the hydrogen produced in the first reactor (5) and the second reactor (6) may be secured to 99% or more, preferably 99.9% or more through the gas filter (16).

[0057] In addition, the hydrogen production method according to one embodiment of the present invention may further include filtering the residue generated after the hydrogen production reaction in the first reactor (5) and the second reactor (6). As described above, in filtering the residue, a filter (17) may be used in each of the first reactor (2) and the second reactor (3), or the reactors may be connected to use one filter (17), and the filter (17) further includes a primary filter (18) and a secondary filter (19) that further filters the residue that has passed through the primary filter (18), and the primary filter (18) has a mesh structure and has a pore size of 30 to 50 mesh, and the secondary filter (19) may include a non-woven fabric, a woven fabric, or a knitted fabric, and may have a pore size of 5 ㎛ or more and 15 ㎛ or less.

[0058] As described above, by including a filtration filter (17) including a primary filter (18) and a secondary filter (19) in each of the first reactor (2) and the second reactor (3), by-products generated after the reaction to produce hydrogen can be filtered and stored as needed. That is, through the primary filtration filter (17), waste metals such as metal materials after the reaction and residual substances after the reaction can be prevented from flowing into the production vessel, and unnecessary residual substances can be additionally filtered through the secondary filtration filter (17), so that the filtered metal salt by-products can be utilized in an environmentally friendly and economical manner as fertilizer production or a coagulant for water treatment.

[0059] FIG. 4 is a flow chart showing a hydrogen production method according to one embodiment of the present invention. Referring to FIG. 4, the first waste acid (7) and the first waste metal (9) can generate hydrogen through an exothermic reaction in the first reactor (5), and the heat generated in the first reactor (5) can be transferred to the second reactor (6) and used in the hydrogen production process of the second waste acid (8) and the second waste metal (10). In addition, the hydrogen produced in each reactor can be collected and stored, and the stored high-purity hydrogen of 99% or more can be secured with a purity of 99.9% or more through an additional hydrogen separation process. In addition, unnecessary residues generated after the hydrogen production reaction in each reactor can be filtered, and the filtered metal salt byproducts can be utilized in processes such as fertilizer production or coagulants for water treatment.

[0060] The hydrogen production method according to the embodiment of the present invention has been described above.

[0061] Below, the present invention is described in detail through experimental examples.

[0062] <Experimental Example 1 - Hydrogen Production Experiment>

[0063] Table 1 below shows the results of an experiment on the amount of hydrogen produced and the reactivity of hydrogen production by diluting a chemical polishing sample (CP) containing 1 g of magnesium metal in weight %, 85% phosphoric acid, and 15% sulfuric acid in water at different concentrations and then reacting them.

[0064] Chemical polishing sample pH - 0.49 - 0.29 0.11 0.5 10.9 4 Chemical polishing sample dilution ratio (CP: water) 1:0 1:1 1:2 1:9 1:3 2 CP volume used in reaction 280 ml 15 ml 6.7 ml 8 ml 7.3 ml Moles of hydrogen produced 28.8 mmol 43.8 mmol 44.6 mmol 44.6 mmol 40.0 mmol (Moles of hydrogen produced) / (CP volume used in reaction) 0.10 mol / L 2.92 mol / L 6.66 mol / L 5.58 mol / L 5.48 mol / L

[0065] Referring to Table 1 above, in this experiment where the chemical polishing sample (CP) was diluted in water at different concentrations and then reacted with magnesium metal, it was confirmed that the hydrogen production reactivity increased as the concentration of the chemical polishing sample (CP) increased, but then decreased at a point where the pH of the chemical polishing sample (CP) was approximately 0.11. Through this, it was confirmed that the hydrogen production reactivity was maximum at 6.66 mol / L when the pH of the chemical polishing sample (CP) was 0.11.

[0066] <Experimental Example 2 - Hydrogen Production Experiment>

[0067] Table 2 below shows the results of an experiment on the amount of hydrogen produced and the reactivity of hydrogen production by reacting a film sample containing 0.5 g of aluminum metal (by weight%), 30% sulfuric acid, and the remainder water at varying pH. The reaction was conducted at a temperature of 53°C for 2 hours and 30 minutes.

[0068] Film sample pH 0.09 0.6 1 1.02 Film sample volume used in reaction 150 ml 58 ml 12 ml Number of moles of hydrogen produced 5.54 mmol 3.17 mmol 0.48 mmol (number of moles of hydrogen produced) / (volume of film sample used in reaction) 0.003 mol / L 0.055 mol / L 0.046 mol / L

[0069] Referring to Table 2 above, in this experiment where each film sample was reacted with aluminum metal at different pHs, it was confirmed that the higher the acid concentration of the film sample, the faster the hydrogen production reaction rate. At this time, it was confirmed that the hydrogen production reactivity was maximum at 0.055 mol / L when the pH of the film sample was 0.61.

[0070] A hydrogen production device (1) according to one embodiment of the present invention includes a first reactor (2) including a first reaction tank (5) provided to receive a first waste acid (7) and a first waste metal (9), a second reaction tank (6) provided to receive a second waste acid (8) and a second waste metal (10), and the second reaction tank (6) may include a second reactor (3) arranged so that the second waste acid (8) in the second reaction tank (6) is heated by heat generated in the first reaction tank (5), and a hydrogen storage device (4) connected to the first reaction tank (5) and the second reaction tank (6) respectively to store hydrogen generated in the first reactor (2) and the second reactor (3).

[0071] In a hydrogen production device (1) according to one embodiment of the present invention, the first waste acid (7) and the second waste acid (8) may include at least one of nitric acid, phosphoric acid, or sulfuric acid.

[0072] In a hydrogen production device (1) according to one embodiment of the present invention, the first waste metal (9) and the second waste metal (10) may include at least one of aluminum, magnesium, zinc, or iron.

[0073] In a hydrogen production device (1) according to one embodiment of the present invention, the first waste acid (7) includes phosphoric acid in an amount of 30% to 90% by weight, sulfuric acid in an amount of 2% to 20% by weight, and the remainder water, the pH of the first waste acid (7) is -0.2 to 4, and the first waste metal (9) may include magnesium.

[0074] In a hydrogen production device (1) according to one embodiment of the present invention, the reaction temperature of the second reactor (6) is 50°C or higher, the second waste acid (8) includes sulfuric acid in a weight percent of 10% or higher and 60% or lower and the remainder water, the pH of the second waste acid (8) is 0.3 or higher and 4 or lower, and the second waste metal (10) may include aluminum.

[0075] In a hydrogen production device (1) according to one embodiment of the present invention, the second reaction tank (6) may be provided to further accommodate one or more of platinum, carbon, or titanium.

[0076] A hydrogen production device (1) according to one embodiment of the present invention may be provided to accommodate a galvanic cell (11) including an anode (12) including at least one of platinum, carbon, or titanium, a cathode (13) including aluminum, a conductor (14) connecting the anode (12) and the cathode (13), and an electronic device (15) connected to the conductor (14) and operable.

[0077] A hydrogen production device (1) according to one embodiment of the present invention may further include a gas filter (16) for separating hydrogen in the hydrogen storage device (4).

[0078] In a hydrogen production device (1) according to one embodiment of the present invention, the first reactor (2) and the second reactor (3) may each further include a filtration filter (17).

[0079] A hydrogen production device (1) according to one embodiment of the present invention further includes a primary filter (18) and a secondary filter (19) for additionally filtering residues that have passed through the primary filter (18), wherein the primary filter (18) has a mesh structure and has a pore size of 30 to 50 meshes, and the secondary filter (19) includes a non-woven fabric, a woven fabric, or a knitted fabric, and may have a pore size of 5 ㎛ or more and 15 ㎛ or less.

[0080] A method for producing hydrogen according to one embodiment of the present invention may include generating hydrogen by exothermically reacting a first waste acid (7) and a first waste metal (9) in a first reaction tank (5), transferring the heat generated from the exotherm reaction to a second reaction tank (6), generating hydrogen by reacting a second waste acid (8) and a second waste metal (10) in the second reaction tank (6), and collecting and storing the hydrogen generated in the first reaction tank (5) and the hydrogen generated in the second reaction tank (6).

[0081] A hydrogen production method according to one embodiment of the present invention may further include galvanically corroding the second waste metal (10) within the second reactor (6).

[0082] A hydrogen production method according to one embodiment of the present invention may further include generating energy through galvanic corrosion within the second reactor (6).

[0083] In a method for producing hydrogen according to one embodiment of the present invention, the first waste acid (7) and the second waste acid (8) may include at least one of nitric acid, phosphoric acid, or sulfuric acid, and the first waste metal (9) and the second waste metal (10) may include at least one of aluminum, magnesium, zinc, or iron.

[0084] In a method for producing hydrogen according to one embodiment of the present invention, the first waste metal (9) may include magnesium, and the second waste metal (10) may include aluminum.

[0085] In a hydrogen production method according to one embodiment of the present invention, the first waste acid (7) may include phosphoric acid in an amount of 30% to 90% by weight, sulfuric acid in an amount of 2% to 20% by weight, and the remainder water, and the second waste acid (8) may include sulfuric acid in an amount of 10% to 60% by weight, and the remainder water.

[0086] In a hydrogen production method according to one embodiment of the present invention, the pH of the first waste acid (7) may be -0.2 or more and 4 or less, the reaction temperature of the second reaction tank (6) may be 50°C or more, and the pH of the second waste acid (8) may be 0.3 or more and 4 or less.

[0087] A method for producing hydrogen according to one embodiment of the present invention may further include separating the stored hydrogen from water vapor and air.

[0088] In a hydrogen production method according to one embodiment of the present invention, the purity of the separated hydrogen may be 99% or higher.

[0089] The hydrogen production method according to one embodiment of the present invention may further include filtering the residue generated after the hydrogen production reaction in the first reaction tank (5) and the second reaction tank (6).

[0090] Above, the hydrogen production device and hydrogen production method according to the embodiment of the present invention have been described.

[0091] According to the idea of ​​the present disclosure, a hydrogen storage device (4) may include a first reactor (2) including a first reactor (5) arranged to receive a first waste acid (7) and a first waste metal (9), a second reactor (6) arranged to receive a second waste acid (8) and a second waste metal (10), and the second reactor (6) may include a second reactor (3) arranged so that the second waste acid (8) in the second reactor (6) is heated by heat generated in the first reactor (5), and a hydrogen storage device (4) connected to the first reactor (5) and the second reactor (6) respectively to store hydrogen generated in the first reactor (2) and the second reactor (3).

[0092] Although the embodiments of the invention disclosed above have been illustrated and described, the disclosed invention is not limited to the specific embodiments described above, and various modifications may be implemented by a person having ordinary skill in the art to which the disclosed invention pertains without departing from the gist claimed in the claims.

Claims

1. A first reactor (2) including a first reactor (5) provided to receive a first waste acid (7) and a first waste metal (9); A second reactor (3) comprising a second reactor (6) arranged to receive a second waste acid (8) and a second waste metal (10), wherein the second reactor (6) is arranged such that the second waste acid (8) in the second reactor (6) is heated by heat generated in the first reactor (5); and A hydrogen production device (1) including a hydrogen storage device (4) connected to the first reactor (5) and the second reactor (6), respectively, to store hydrogen generated in the first reactor (2) and the second reactor (3).

2. In claim 1, A hydrogen production device (1) in which the first waste acid (7) and the second waste acid (8) contain at least one of nitric acid, phosphoric acid, or sulfuric acid.

3. In claim 1, A hydrogen production device (1) wherein the first waste metal (9) and the second waste metal (10) include at least one of aluminum, magnesium, zinc, or iron.

4. In claim 1, The above first waste acid (7) contains phosphoric acid in an amount of 30% to 90% by weight, sulfuric acid in an amount of 2% to 20% by weight, and the remainder water. The pH of the above first waste acid (7) is -0.2 or more and 4 or less, The above first waste metal (9) is a hydrogen production device (1) containing magnesium.

5. In claim 1, The reaction temperature of the above second reaction tank (6) is 50°C or higher, The above second waste acid (8) contains sulfuric acid in an amount of 10% to 60% by weight and the remainder water, The pH of the above second waste acid (8) is 0.3 or more and 4 or less, The above second waste metal (10) is a hydrogen production device (1) containing aluminum.

6. In claim 1, The above second reactor (6) is a hydrogen production device (1) provided to accommodate at least one of platinum, carbon, or titanium.

7. In claim 1, The second reactor (6) is a hydrogen production device (1) configured to accommodate a galvanic cell (11) including an anode (12) comprising at least one of platinum, carbon, or titanium; a cathode (13) comprising aluminum; a conductor (14) connecting the anode (12) and the cathode (13); and an electronic device (15) configured to be connected to the conductor (14) and operable.

8. In claim 1, The above hydrogen storage device (4) is a hydrogen production device (1) further including a gas filter (16) for separating hydrogen.

9. In claim 1, A hydrogen production device (1) wherein the first reactor (2) and the second reactor (3) each further include a filter (17).

10. In claim 9, The above filter (17) further includes a primary filter (18) and a secondary filter (19) that additionally filters the residue that has passed through the primary filter (18). The above primary filter (18) has a mesh structure, and the pore size is 30 to 50 mesh. The above secondary filter (19) is a hydrogen production device (1) comprising a non-woven fabric, fabric or knitted fabric, and having a pore size of 5㎛ or more and 15㎛ or less.

11. The first waste acid (7) and the first waste metal (9) are reacted exothermically in the first reactor (5) to produce hydrogen; The heat generated in the above exothermic reaction is transferred to the second reactor (6); The second waste acid (8) and the second waste metal (10) are reacted in the second reactor (6) to produce hydrogen; and A hydrogen production method comprising collecting and storing hydrogen produced in the first reactor (5) and hydrogen produced in the second reactor (6).

12. In claim 11, A hydrogen production method further comprising galvanically corroding the second waste metal (10) within the second reaction tank (6).

13. In claim 11, The first waste acid (7) and the second waste acid (8) contain at least one of nitric acid, phosphoric acid, or sulfuric acid, A method for producing hydrogen, wherein the first waste metal (9) and the second waste metal (10) contain at least one of aluminum, magnesium, zinc, or iron.

14. In claim 11, The above first scrap metal (9) contains magnesium, The above second waste metal (10) is a hydrogen production method including aluminum.

15. In claim 11, The above first waste acid (7) contains phosphoric acid in an amount of 30% to 90% by weight, sulfuric acid in an amount of 2% to 20% by weight, and the remainder water. The above second waste acid (8) is a hydrogen production method containing sulfuric acid in an amount of 10% to 60% by weight and the remainder water.

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