CN-116845280-B - Gas-liquid self-separating electricity-hydrogen cogeneration device

Abstract

The invention discloses a gas-liquid self-separation electro-hydrogen cogeneration device which comprises an anode flow field plate, a cathode gas-liquid self-separation flow field plate, an anode electrode and a cathode electrode which are loaded with noble metal catalysts, and a cationic membrane for dividing the anode electrode and the cathode electrode, wherein the cathode gas-liquid self-separation flow field plate is divided into a reaction area and a separation area by a vertically arranged separation rib, the reaction area is communicated with the separation area through a flow passage above the separation rib, the reaction area is provided with a reaction area flow passage, the cathode gas-liquid self-separation flow field plate is divided into the reaction area and the separation area, the arrangement mode of the separation area is adopted, the independent design optimization of the performance and the separation effect of a battery is facilitated, the high-performance and the separation area of the battery is guaranteed, the self-separation flow field design avoids the extra gas-liquid separation device, the integration level and the usability of the electro-hydrogen cogeneration device are improved, the gas-liquid separation reliability is improved, and the gas-liquid separation flow field optimization design difficulty is reduced.

Inventors

• WANG RUI
• LI YINSHI
• Hao Mingcheng
• Zhong Fazheng

Assignees

• 西安交通大学

Dates

Publication Date

20260512

Application Date

20230726

Claims (8)

1. 1. The gas-liquid self-separating electro-hydrogen co-production device is characterized by comprising an anode flow field plate (1), a cathode gas-liquid self-separating flow field plate (5), an anode electrode (2) and a cathode electrode (4) which are loaded with noble metal catalysts, and a cation membrane (3) for dividing the anode electrode (2) and the cathode electrode (4); The cathode gas-liquid separation flow field plate (5) is divided into a reaction zone (I) and a separation zone (II) by a vertically arranged separation rib (6), the reaction zone (I) and the separation zone (II) are communicated with each other through a flow channel above the separation rib (6), a reaction zone flow channel (7) is arranged in the reaction zone (I), the reaction zone flow channel (7) is communicated with a flow field inlet (8), the separation zone (II) is divided into a separation cavity (13) close to one side of the reaction zone (I) and a liquid cavity (14) at the other side by a vertical partition plate, the bottom of the separation cavity (13) is connected with the liquid cavity (14) through a communication opening (15) below the vertical partition plate, the upper part of the liquid cavity (14) is communicated with a liquid outlet (12), a vertically arranged baffle rib (9) is arranged at the upper part of the separation cavity (13), the separation cavity (13) is divided into a vertical flow channel (11) and a gas flow channel, the vertical flow channel (11) close to one side of the separation rib (6) is communicated with the reaction zone flow channel (7) of the reaction zone (I) through the flow channel above the separation rib (6), and the gas outlet (10) is communicated with the gas outlet (10); After the solution flows into the flow channel (7) of the reaction zone from the flow field inlet (8) to generate two-phase fluid, the mixed fluid flows into the separation cavity (13) of the separation zone (II) through the flow channel above the separation rib (6), the gas leaves the flow field from the gas outlet (10) through the gas flow channel after the mixed fluid is layered under the action of gravity, and the liquid flows into the liquid cavity (14) from the liquid outlet (12) through the bottom layer communication port (15) to leave the flow field.
2. 2. The gas-liquid self-separating electro-hydrogen co-production device according to claim 1, wherein the reaction zone flow channel (7) is a serpentine flow channel, a parallel flow channel, an interdigital flow channel or a lattice flow channel.
3. 3. A gas-liquid self-separating cogeneration plant according to claim 1, wherein said baffle ribs (9) are rectangular, square, trapezoidal or triangular.
4. 4. A gas-liquid self-separating electro-hydrogen co-production apparatus according to claim 2 or 3, wherein the flow field inlet (8) is arranged at a position below one side of the cathode gas-liquid self-separating flow field plate (5) close to the reaction zone (I), and the gas outlet (10) and the liquid outlet (12) are respectively arranged at a position above and below one side of the cathode gas-liquid self-separating flow field plate (5) close to the separation zone (II).
5. 5. The gas-liquid self-separating electro-hydrogen co-production device according to claim 4, wherein the cathode electrode (4) adopts a Pt-based catalyst, and the Pt-based catalyst is supported on a three-dimensional graphite felt substrate layer through a Nafion binder.
6. 6. The gas-liquid self-separating electro-hydrogen co-production device according to claim 5, wherein the anode electrode (2) adopts a Pd-based catalyst, and the Pd-based catalyst is supported on a three-dimensional graphite felt substrate layer through a PTFE binder.
7. 7. The gas-liquid self-separating cogeneration plant of claim 4 wherein the anode uses formate solution as the reactant and the cathode uses dilute acid solution as the reactant.
8. 8. The gas-liquid self-separating electro-hydrogen co-production device according to claim 7, wherein the formate solution is sodium formate or potassium formate, and the dilute acid solution is dilute sulfuric acid or dilute hydrochloric acid.

Description

Gas-liquid self-separating electricity-hydrogen cogeneration device Technical Field The invention belongs to the technical field of fuel cells, and particularly relates to a gas-liquid self-separation electricity-hydrogen cogeneration device. Background The hydrogen energy is an ideal interconnection medium for promoting the clean and efficient utilization of the traditional fossil energy and supporting the large-scale development of renewable energy, and is the best choice for realizing large-scale deep decarburization in the fields of transportation, industry, construction and the like. However, the prior art is insufficient to support safe and effective operation of the entire hydrogen energy industry chain, and the large-scale utilization of hydrogen energy also faces some important challenges. For example, hydrogen has low volume energy density, is not easy to store and has potential safety hazard, and the hydrogen transportation technology has high admission threshold, and the transportation cost even exceeds the production cost, so that the problems seriously prevent the large-scale application of hydrogen energy. At present, the storage and transportation modes of hydrogen mainly comprise three types of gaseous hydrogen storage, liquid hydrogen storage and solid hydrogen storage. Wherein gaseous hydrogen storage requires high pressure conditions, liquid hydrogen storage requires low temperature conditions, and solid hydrogen storage requires additional solid materials. In contrast, the adoption of liquid chemical hydrogen storage has the advantages of mild storage conditions, availability of the existing chemical storage and transportation equipment, high safety performance and the like. Formate is used as a liquid chemical hydrogen storage carrier, has extremely stable chemical properties, has no safety problems such as flammability, toxicity and the like, is favorable for long-term storage and long-distance transportation, and is therefore paid attention to researchers. The use of formate as a hydrogen carrier for distributed off-site hydrogen production is considered to be an effective solution to the current problems of hydrogen storage and transport. Formate hydrogen-producing devices are important devices for producing hydrogen by formate decomposition. The design of the different plant structures can have a significant impact on the efficiency of formate decomposition. At present, formate hydrogen production equipment stays in a laboratory research stage, and mature integrated device designs are few. And more equipment and instruments are required to be connected in the laboratory for hydrogen production, and the gas-liquid separation steps of the product are more, so that the large-scale integrated production is not facilitated. In addition, most hydrogen production processes waste chemical energy of formate, reduce hydrogen production income and are not beneficial to further popularization and application of formate hydrogen production technology. Therefore, a highly integrated formate decomposition hydrogen production device needs to be designed, the system usability is improved, high-efficiency gas-liquid separation is realized, meanwhile, the chemical energy of a reaction system is fully utilized, and high-efficiency, convenient, flexible and low-cost distributed hydrogen production is realized. Disclosure of Invention Aiming at the problems existing in the prior art, the invention aims to provide the gas-liquid self-separation electricity-hydrogen cogeneration device which can be highly integrated, realize gas-liquid separation in the device, is portable and easy to use and fully utilizes chemical energy. In order to achieve the purpose, the invention is realized by adopting the following technical scheme: A gas-liquid self-separating electro-hydrogen co-production device comprises an anode flow field plate, a cathode gas-liquid self-separating flow field plate, an anode electrode and a cathode electrode which are loaded with noble metal catalysts, and a cation membrane for dividing the anode electrode and the cathode electrode; The cathode gas-liquid separation flow field plate is divided into a reaction area and a separation area by a vertically arranged separation rib, the reaction area is communicated with the separation area through a flow channel above the separation rib, the reaction area is internally provided with a reaction area flow channel, the reaction area flow channel is communicated with a flow field inlet, the separation area is separated by a vertical separation plate to be close to a separation cavity at one side of the reaction area and a liquid cavity at the other side of the reaction area, the bottom of the separation cavity is connected with a fluid cavity through a communicating opening below the vertical separation plate, and the upper part of the fluid cavity is communicated with a liquid outlet; After the solution flows into the flow channel of the reaction zo