Method for producing hydrogen by electrolyzing pure seawater through photovoltaic direct current

Abstract

The invention discloses a method for producing hydrogen by electrolyzing pure seawater through photovoltaic direct current. The method comprises the following steps: S1, connecting a photovoltaic panel with positive and negative wiring terminals on a small-sized device for producing hydrogen by electrolyzing water through positive and negative wires after the photovoltaic panel emits unstable current; s2, direct current of the photovoltaic panel is directly supplied to a positive electrode and a negative electrode on the small water electrolysis hydrogen production device, the material of the positive electrode is titanium plate plated platinum or nickel plate plated platinum, and the material of the negative electrode is carbon crystal, graphene or graphite; s3, conducting electricity to the hydrogen-oxygen separation membrane cathode hydrogen-oxygen separation membrane through direct-current electrification by the cathode to generate hydrogen; s4, the anode generates oxygen after being electrified through direct current, and then hydrogen is discharged through a hydrogen pipeline; according to the method for producing the hydrogen by electrolyzing the pure seawater through the photovoltaic direct current, titanium plate platinum plating and nickel plate platinum plating are adopted as anode materials, carbon crystals, graphene and graphite are adopted as cathode materials, and the anode materials and the cathode materials are matched in the work of electrolyzing the mine water and are resistant to corrosion, free of incrustation, good in electrolysis effect and long in service cycle.

Description

Technical Field

[0001] The invention belongs to the technical field of hydrogen production, and in particular relates to a method for producing hydrogen by electrolyzing pure seawater using photovoltaic direct current. Background Art

[0002] Hydrogen energy has many uses. It can be used as a chemical raw material, as an energy source, and as a storage medium to act as an energy buffer. It can be used in the three areas of electricity, heating and fuel.

[0003] The current pure seawater electrolysis hydrogen production system has the characteristics of simple structure, low cost and high efficiency in hydrogen production. However, before treating the seawater, the pure seawater needs to be pre-treated, and the seawater electrolysis hydrogen production technology cannot be directly carried out through unstable photovoltaic current, which causes waste and cannot meet the existing usage needs. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a method for producing hydrogen by electrolyzing pure seawater with photovoltaic direct current, which can directly electrolyze seawater to produce hydrogen, is easy to operate, and has high electrolysis efficiency.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a method for producing hydrogen by electrolyzing pure seawater with photovoltaic direct current, comprising the following steps:

[0006] S1, the photovoltaic panel emits an unstable current and is connected to the positive and negative terminals on the small water electrolysis hydrogen production device through positive and negative wires;

[0007] S2. Directly supplying the direct current of the photovoltaic panel to the anode and cathode electrodes on the small-scale water electrolysis hydrogen production device, wherein the anode material is a titanium plate plated with platinum or a nickel plate plated with platinum, and the cathode material is carbon crystal, graphene or graphite;

[0008] S3, the cathode conducts electricity to the hydrogen-oxygen separation membrane through direct current to generate hydrogen;

[0009] S4. The anode generates oxygen after being energized by direct current, and then hydrogen is discharged through the hydrogen pipeline.

[0010] In one embodiment, the DC power supply of the photovoltaic panel is 1-100V.

[0011] In one embodiment, the distance between the anode electrode plate and the cathode electrode plate is less than 0.1 mm-10 mm.

[0012] In one embodiment, the diameter of the anode electrode plate is no greater than 1 m, and the diameter of the cathode electrode plate is no greater than 1.2 m.

[0013] In one embodiment, the material density of the anode electrode plate is greater than the material density of the cathode electrode plate.

[0014] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0015] The photovoltaic direct current method for producing hydrogen by electrolyzing pure seawater using water is characterized in that the anode material is titanium plate plated with platinum or nickel plate plated with platinum, and the cathode material is carbon crystal, graphene, and graphite. The combination of the anode material and the cathode material in the electrolysis of mine water is corrosion-resistant, does not form scale, has good electrolysis effect, and has a long service life, thus meeting the requirements of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technical solution of the present invention is further described below in conjunction with the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the process flow of the present invention. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0019] The present invention provides a method for producing hydrogen by electrolyzing pure seawater with photovoltaic direct current, so as to solve the problem that the prior art cannot directly use unstable photovoltaic current to produce hydrogen by electrolyzing seawater, resulting in waste of resources.

[0020] For ease of understanding, the specific process in the embodiments of the present application is described below. Figure 1 In the embodiment of the present application, a method for producing hydrogen by electrolyzing pure seawater using photovoltaic direct current comprises the following steps:

[0021] S1, the photovoltaic panel emits an unstable current and is connected to the positive and negative terminals on the small water electrolysis hydrogen production device through positive and negative wires;

[0022] S2. Directly supplying the direct current of the photovoltaic panel to the anode and cathode electrodes on the small-scale water electrolysis hydrogen production device, wherein the anode material is a titanium plate plated with platinum or a nickel plate plated with platinum, and the cathode material is carbon crystal, graphene or graphite;

[0023] S3, the cathode conducts electricity to the hydrogen-oxygen separation membrane through direct current to generate hydrogen;

[0024] S4. The anode generates oxygen after being energized by direct current, and then hydrogen is discharged through the hydrogen pipeline.

[0025] In one embodiment, the DC power supply of the photovoltaic panel is 1-100V. Of course, the power of the DC power supply can be increased by adding photovoltaic panels to meet different needs.

[0026] In one embodiment, the distance between the anode electrode plate and the cathode electrode plate is less than 0.1mm-10mm, so that the distance meets the creepage distance, and the area between the anode electrode plate and the cathode electrode plate is a charged area. Such a setting allows the present invention to use raw seawater for electrolysis. At the same time, the creepage distance is calculated based on the raw seawater as the medium, and the area between the anode electrode plate and the cathode electrode plate is hydrogen and oxygen gas with a hydrogen and oxygen separation module in the middle. The present invention sets the cathode electrode as a static pressure graphite electrode; positive titanium, iron, stainless steel, and nickel-coated platinum are used as anode electrodes. The creepage distance and the conductivity of pure seawater do not require any catalyst or conductive liquid, and the safety structure is improved.

[0027] In one embodiment, the density of the anode electrode plate material is greater than that of the cathode electrode plate material. This is because, in the process of electrolyzing seawater to produce hydrogen, water is decomposed into oxygen (O2), protons (H + ) and electron (e - ), protons pass through the proton exchange membrane into the cathode, and electrons pass from the anode through the power circuit to the cathode. On the cathode side, the two protons and electrons recombine to produce hydrogen (H2). In the whole process, the anode oxygen evolution reaction produces a large amount of H + , which causes the anode to be in a strongly acidic state, and requires high corrosion resistance of the materials used in the anode environment, so the density of the anode electrode plate material needs to be greater than the density of the cathode electrode plate material.

[0028] Wherein, when the cathode material is graphite, sealing treatment is performed at the graphite fixing place or the vent hole and the edge of the graphite outer wall to ensure the sealing use requirements.

[0029] The platinum-plated titanium plate and platinum-plated nickel plate in the present invention are matched with carbon crystal, graphene, graphite and other materials to be corrosion-resistant, scale-free, have good electrolysis effect and a long service life in the electrolysis of mine water, thereby forming a technology that electrolyzes mine water into hydrogen to direct current to photovoltaic panels, and then directly supplies hydrogen production equipment to achieve an integrated, convenient, latest and use-required technology.

[0030] In one embodiment, the diameter of the anode electrode plate is no greater than 1 m, and the diameter of the cathode electrode plate is no greater than 1.2 m.

[0031] The present invention utilizes all the unstable direct current electricity 2-1000V of photovoltaic panels to produce direct current and direct supply to form a photovoltaic direct current hydrogen production device dedicated to self-generation. The electricity generated by the photovoltaic panels is directly combined with the photovoltaic direct current to electrolyze mine water to produce hydrogen, realizing an integrated, convenient, latest and use-demanding technology.

[0032] In addition, the reaction of the present invention can work under an unstable voltage ranging from 5V to 5000V, and is suitable for direct applications such as photovoltaic power generation, wind power generation, and ocean power generation energy.

[0033] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for producing hydrogen by electrolyzing pure seawater using photovoltaic direct current, characterized in that: The steps include: S1, the photovoltaic panel emits an unstable current and is connected to the positive and negative terminals on the small water electrolysis hydrogen production device through positive and negative wires; S2. Directly supplying the direct current of the photovoltaic panel to the anode and cathode electrodes on the small-scale water electrolysis hydrogen production device, wherein the anode material is a titanium plate plated with platinum or a nickel plate plated with platinum, and the cathode material is carbon crystal, graphene or graphite; S3, the cathode conducts electricity to the hydrogen-oxygen separation membrane through direct current to generate hydrogen; S4. The anode generates oxygen after being energized by direct current, and then hydrogen is discharged through the hydrogen pipeline.

2. The method for producing hydrogen by electrolyzing pure seawater using photovoltaic direct current as claimed in claim 1, characterized in that: The direct current power supply of the photovoltaic panel is 1-100V.

3. The method for producing hydrogen by electrolyzing pure seawater using photovoltaic direct current as claimed in claim 1, characterized in that: The distance between the anode electrode plate and the cathode electrode plate is less than 0.1 mm-10 mm.

4. The method for producing hydrogen by electrolyzing pure seawater using photovoltaic direct current as claimed in claim 1, characterized in that: The diameter of the anode electrode plate is not greater than 1 m, and the diameter of the cathode electrode plate is not greater than 1.2 m.

5. The method for producing hydrogen by electrolyzing pure seawater using photovoltaic direct current as claimed in claim 1, characterized in that: The material density of the anode electrode plate is greater than the material density of the cathode electrode plate.

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