CN217378044U - Novel high-temperature electrochemical urea electrolytic cell device - Google Patents
Novel high-temperature electrochemical urea electrolytic cell device Download PDFInfo
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- CN217378044U CN217378044U CN202123003138.1U CN202123003138U CN217378044U CN 217378044 U CN217378044 U CN 217378044U CN 202123003138 U CN202123003138 U CN 202123003138U CN 217378044 U CN217378044 U CN 217378044U
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Abstract
The utility model provides a novel urea electrolytic cell of high temperature electrochemistry system device utilizes nitrogen gas and carbon dioxide electrochemistry direct coupling preparation urea under the heating condition, belongs to electrochemistry and electro-catalytic reaction equipment technical field. The device comprises a cathode plate, a cathode runner, an anode plate, an anode runner, a cathode gas diffusion layer, a cathode catalyst layer, a common gasket, a cathode electrolyte chamber gasket, a cathode electrolyte layer, a solid electrolyte layer, an anode catalyst layer, an anode gas diffusion layer, a heating system, a high-temperature compression screw and an electrolytic cell incubator. The high-temperature electrochemical urea electrolytic cell device with the structure has the characteristics of reasonable design structure, simple assembly process, high urea conversion rate, low material cost, long service life and the like, can realize large-scale urea production, greatly improves the production efficiency and meets the production requirements.
Description
Technical Field
The utility model belongs to the technical field of electrochemistry and electro-catalytic reaction equipment, concretely relates to novel urea electrolytic cell is made to high temperature electrochemistry device.
Background
Urea, also known as urea, carbonamide, of the formula CO (NH) 2 ) 2 It is an important raw material in chemical industry. The urea is stable, easy to store, convenient to use, and small in destructive power to soil, and is a fertilizer nitrogen source with the highest nitrogen content. However, in the current industrial production of urea, carbon dioxide and ammonia are used as raw materials, wherein the industrial production of ammonia is carried out at high temperature and high pressure, the energy consumption is high, and the operation is dangerous. In addition, the industrial preparation of urea by using carbon dioxide and ammonia firstly generates ammonium carbamate, and then forms urea through dehydration, the reaction conditions are high temperature and high pressure, the energy consumption is high, and the reaction equation is as follows:
2NH 3 +CO 2 →NH 2 COONH 4 →CO(NH 2 ) 2 +H 2 O
by the electrolysis technology, the synthesis of chemicals with high added value by utilizing electric energy has important significance for the sustainable development of human society. At present, the electrochemical reduction of nitrogen and carbon dioxide to produce urea at room temperature has been reported to be a relatively new process. However, this method generally employs an H-cell (H-cell) at room temperature, and nitrogen and carbon dioxide gas are introduced into the catholyte to react with dissolved nitrogen and carbon dioxide. However, the method using H-cell and using dissolved gas has low reaction efficiency and low urea yield, and the most important reasons include: firstly, the activation and conversion of nitrogen at room temperature are difficult; secondly, the mass transfer is difficult only by the reaction of the dissolved carbon dioxide and the nitrogen; thirdly, the side reaction of the cathode produces hydrogen seriously.
Therefore, a novel high-temperature electrochemical urea preparation electrolytic cell device is found, nitrogen and carbon dioxide are activated in situ at a high temperature, the gas phase is directly coupled to prepare urea, and meanwhile, a high-temperature-resistant electrolyte layer is added to a cathode to inhibit hydrogen evolution reaction and reduce overpotential, so that the device is the key point of future attention of researchers in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, to the not enough of current room temperature H-cell electrochemistry preparation urea technique, the utility model provides a novel high temperature electrochemistry system urea electrolytic cell device, the device can utilize nitrogen gas and carbon dioxide's direct coupling under the higher temperature, realizes the large-scale production of urea. The electrolytic cell assembly method is simple, low in cost and remarkable in reaction efficiency, and has a good application prospect in industrial production in the future.
For solving the above technical problem, the technical scheme of the utility model is that: a novel high-temperature electrochemical urea electrolytic cell device comprises a cathode plate, a cathode runner, an anode plate, an anode runner, a cathode gas diffusion layer, a cathode catalyst layer, a common gasket, a cathode electrolyte chamber gasket, a cathode electrolyte layer, a solid electrolyte layer, an anode catalyst layer, an anode gas diffusion layer, a heating system, a high-temperature compression screw and an electrolytic cell incubator.
As a novel high-temperature electrochemical urea electrolytic cell device, a cathode plate and an anode plate of a high-temperature electrolytic cell are respectively provided with a cathode runner and an anode runner for gas-liquid circulation, the cathode plate is provided with a cathode runner inlet and a cathode runner outlet, the anode plate is provided with an anode runner inlet and an anode runner outlet, and each side of the electrode plate is provided with a power supply interface; the cathode plate and the anode plate are separated by a common gasket, and a cathode electrolyte chamber gasket is additionally arranged between the common gasket and the cathode plate and used for storing a cathode electrolyte layer; the gasket of the catholyte chamber is provided with an electrolyte inlet and an electrolyte outlet; the cathode plate, the anode plate, the common gasket and the gasket of the catholyte chamber are fixedly connected through high-temperature compression screws; heating systems are arranged on the negative plate and the positive plate, and an electrolytic cell heat preservation box is arranged outside the electrolytic cell; a closed space is formed among the cathode plate, the anode plate, the common gasket and the cathode electrolyte chamber gasket, a catalyst layer, a gas diffusion layer, an electrolyte and an electrolyte layer are arranged in the closed space, and the cathode gas diffusion layer, the cathode catalyst layer, the cathode electrolyte layer, the solid electrolyte layer, the anode catalyst layer and the anode gas diffusion layer are sequentially arranged from the cathode plate to the anode plate.
As a novel high-temperature electrochemical urea electrolytic cell, the cathode plate and the anode plate of the electrolytic cell are circular, square or rhombic.
As a novel high-temperature electrochemical urea electrolytic cell, the cathode plate, the cathode runner, the anode plate, the anode runner, the heating system, the high-temperature compression screw, the cathode runner inlet, the cathode runner outlet, the anode runner inlet, the anode runner outlet and the power interface of the electrolytic cell are made of one or more than two of graphite, stainless steel and engineering plastics.
As a novel high-temperature electrochemical urea electrolytic cell, the electrolytic cell heat insulation box is used for ensuring the reaction temperature in the electrolytic cell and is made of one or more than two of inorganic heat insulation materials and organic heat insulation materials.
As a new kind of high-temperature electrochemical urea electrolytic cell, the ordinary gasket and catholyte chamber gasket are used for sealing the electrolytic cell, avoiding the short circuit of the bipolar plate, in addition, the catholyte chamber gasket is used for constructing a catholyte chamber; the gasket is made of one or more than two of silica gel, polytetrafluoroethylene and engineering plastics.
As a novel urea electrolytic cell prepared by high-temperature electrochemistry, the cathode gas diffusion layer and the anode gas diffusion layer are made of one or more than two of carbon paper, carbon cloth, porous metal and alloy, porous metal compound and porous stainless steel.
As a novel high-temperature electrochemical urea electrolytic cell, the cathode catalyst layer and the anode catalyst layer are made of one or more than two of nonmetal, non-noble metal and noble metal.
As a novel high-temperature electrochemical urea electrolytic cell, a closed space is formed among a cathode plate, an anode plate, a common gasket and a cathode electrolyte chamber gasket, a catalyst layer, a gas diffusion layer, an electrolyte and an electrolyte layer are arranged in the closed space, and the thickness sum of all layers is consistent with the thickness of the closed space.
As a novel urea electrolytic cell of high temperature electrochemistry system, the negative plate outside is located to negative pole runner import, negative pole runner export, and the anode plate outside is located to positive pole runner import, positive pole runner export, and the catholyte chamber gasket outside is located to electrolyte import, electrolyte export, import and exit position can exchange according to actual reaction demand.
As a novel high-temperature electrochemical urea electrolytic cell, an anode reactant is water vapor, enters an anode flow channel from an inlet of the anode flow channel, reaches the surface of an anode catalyst layer after being dispersed by an anode gas diffusion layer, is oxidized into oxygen, flows out from an outlet of the anode flow channel, and meanwhile, generated protons pass through a solid electrolyte layer and a cathode electrolyte layer and reach the surface of the cathode catalyst layer.
As a novel high-temperature electrochemical urea electrolytic cell, cathode reactants of carbon dioxide and nitrogen enter a cathode flow channel from an inlet of the cathode flow channel, are dispersed by a cathode gas diffusion layer and then reach the surface of a cathode catalyst layer, and are coupled with protons from an anode to generate urea on the surface of the cathode catalyst layer, and the urea flows out from an outlet of the cathode flow channel.
As a novel high-temperature electrochemical urea electrolytic cell, the cathode electrolyte layer has the functions of ion exchange, cathode reaction selectivity enhancement and the like, is made of one or more of ionic liquid, organic solvent, organic polymer and inorganic salt compound, has certain fluidity or is in a sheet shape without fluidity, has the thickness consistent with that of a gasket of the cathode electrolyte layer, and can be used or removed according to actual reaction requirements.
As a novel high-temperature electrochemical urea electrolytic cell, a solid electrolyte layer has an ion exchange function and is made of one or more of organic polymers, silicon oxides, phosphorus oxides, boron oxides, metals and alloys and metal compounds, and the solid electrolyte layer is flaky.
As a novel high-temperature electrochemical urea electrolytic cell, the anode runner is one or more than two of annular, snake-shaped, parallel, crossed and zigzag, and the anode gas diffusion layer and the anode catalyst layer are flaky.
As a novel high-temperature electrochemical urea electrolytic cell, the cathode flow channel is one or more than two of annular, serpentine, parallel, crossed and zigzag, and the cathode gas diffusion layer and the cathode catalyst layer are flaky.
The device has the advantages of simple assembly process, easily-controlled size, low material cost, obvious reaction strengthening effect and good application prospect in industrial production.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a high-temperature electrochemical urea production electrolytic cell apparatus.
In the figure: the cathode plate 1, the cathode runner 2, the anode plate 3, the anode runner 4, the cathode gas diffusion layer 5, the cathode catalyst layer 6, the common gasket 7, the cathode electrolyte chamber gasket 8, the cathode electrolyte layer 9, the solid electrolyte layer 10, the anode catalyst layer 11, the anode gas diffusion layer 12, the heating system 13, the high-temperature compression screw 14, the electrolytic cell incubator 15, the cathode runner inlet 16, the cathode runner outlet 17, the anode runner inlet 18, the anode runner outlet 19, the power supply interface 20, the electrolyte inlet 21 and the electrolyte outlet 22.
FIG. 2 is a schematic diagram of the main block of the high-temperature electrochemical urea electrolytic cell device of the high-temperature electrochemical urea electrolytic cell according to the embodiment without the gas diffusion layer, the catalyst layer, the electrolyte layer, the solid electrolyte layer, and the electrolytic cell incubator.
FIG. 3 is a schematic diagram of the cathode plate 1 and the cathode runner 2 of the high-temperature electrochemical urea electrolytic cell device according to the embodiment.
FIG. 4 is a schematic diagram of the anode plate 3 and the anode runner 4 of the high-temperature electrochemical urea electrolytic cell device according to the embodiment.
FIG. 5 is a schematic view of the high-temperature pressing screw 14 of the urea electrolytic cell device manufactured by high-temperature electrochemistry according to the embodiment.
FIG. 6 is a schematic view of a general gasket 7 of the high-temperature electrochemical urea electrolytic cell device according to the embodiment.
FIG. 7 is a schematic diagram showing the structure of a gasket 8 in a catholyte chamber of the high-temperature electrochemical urea electrolytic cell apparatus according to the embodiment.
FIG. 8 is a schematic diagram showing the structures of a gas diffusion layer, a catalyst layer, an electrolyte layer and an electrolyte layer of the high-temperature electrochemical urea electrolytic cell device according to the embodiment.
In the figure: a cathode gas diffusion layer 5, a cathode catalyst layer 6, a cathode electrolyte layer 9, a solid electrolyte layer 10, an anode catalyst layer 11, and an anode gas diffusion layer 12.
FIG. 9 is a schematic view showing the structure of an electrolytic cell thermal container 15 of the apparatus for manufacturing urea by high-temperature electrochemistry in accordance with the embodiment.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the described embodiments are only for the aid of understanding the present invention and should not be considered as specific limitations of the present invention. Various modifications and variations may be made without departing from the scope of the invention as defined in the appended claims, and any such modifications and variations, if any, are intended to be within the scope of the invention as described herein. Furthermore, the background is intended to illustrate the present state of research and development and the meaning of the present invention, and is not intended to limit the field of application of the present invention or the present application.
Examples
The embodiment of the utility model provides a pair of novel high temperature system urea electrolytic cell device, its core cell structure schematic diagram is shown in fig. 1 and fig. 2, the utility model discloses the core cell structure that provides includes negative plate 1, cathode runner 2, anode plate 3, anode runner 4, cathode gas diffusion layer 5, cathode catalyst layer 6, ordinary gasket 7, cathode electrolyte chamber gasket 8, cathode electrolyte liquid layer 9, solid-state electrolyte layer 10, anode catalyst layer 11, anode gas diffusion layer 12, heating system 13, housing screw 14, electrolytic cell insulation can 15, cathode runner import 16, cathode runner export 17, anode runner import 18, anode runner export 19, power source 20, electrolyte import 21, electrolyte export 22.
In the embodiment of the utility model, the cathode plate 1 and the anode plate 3 of the electrolytic cell are circular, the anode runner 4 and the cathode runner 2 are annular, wherein the structural schematic diagram of the cathode plate 1 and the cathode runner 2 is shown in fig. 3, and the structural schematic diagram of the anode plate 3 and the anode runner 4 is shown in fig. 4.
In the embodiment of the present invention, the material of the cathode plate 1, the cathode runner 2, the anode plate 3, the anode runner 4, the heating system 13, the cathode runner inlet 16, the cathode runner outlet 17, the anode runner inlet 18, the anode runner outlet 19, and the power source 20 of the electrolytic cell is stainless steel, the material of the hold-down screw 14 is engineering plastic, and the schematic structural diagram of the hold-down screw is shown in fig. 5.
In the embodiment of the utility model, the common gasket 7 and the catholyte chamber gasket 8 are used for sealing the electrolytic cell and avoiding the short circuit of the bipolar plate, and in addition, the catholyte chamber gasket 8 is used for constructing a catholyte chamber; the gasket material is expanded polytetrafluoroethylene, the structural schematic diagram of a common gasket 7 is shown in fig. 6, and the structural schematic diagram of a catholyte chamber gasket 8 is shown in fig. 7.
In the embodiment of the present invention, the cathode gas diffusion layer 5 is made of porous titanium, and the anode gas diffusion layer 12 is made of stainless steel mesh.
In the embodiment of the present invention, the material of the cathode catalyst layer 6 is metal alloy, and the material of the anode catalyst layer 11 is noble metal.
In the embodiment of the present invention, an enclosed space is formed between the cathode plate 1, the anode plate 3, the common gasket 7 and the catholyte chamber gasket 8, a cathode gas diffusion layer 5, a cathode catalyst layer 6, a catholyte layer 9, a solid electrolyte layer 10, an anode catalyst layer 11, and an anode gas diffusion layer 12 are disposed in the enclosed space, and each layer of thickness and structural schematic are as shown in fig. 8.
The embodiment of the utility model provides an in, the anode reactant is vapor, gets into anode flow channel 4 by anode flow channel import 18, reachs anode catalyst layer 11 surface after anode gas diffusion layer 12 dispersion, and the oxidation becomes oxygen, flows out by anode flow channel export 19, and the proton of while production passes solid electrolyte layer 10 and catholyte layer 9, reachs cathode catalyst layer 6 surface.
The embodiment of the utility model provides an in, cathode reactant is carbon dioxide and nitrogen gas, gets into cathode runner 2 by cathode runner import 16, reachs the 6 surfaces of cathode catalyst layer after 5 dispersions of cathode gas diffusion layer, and the proton of coming from the positive pole, at the coupling generation urea on 6 surfaces of cathode catalyst layer, exports 17 by the cathode runner.
In the embodiment of the present invention, the catholyte layer 9 has functions of ion exchange, enhancing cathode reaction selectivity, etc., and is made of ionic liquid. The catholyte layer 9 has a fluidity, and the thickness thereof coincides with the catholyte chamber gasket 8.
In the embodiment of the present invention, the solid electrolyte layer 10 has an ion exchange function, and is made of a compound of silicon oxide, metal phosphate, and metal alloy, and the solid electrolyte layer 10 is sheet-shaped.
In the embodiment of the present invention, the electrolytic cell heat preservation box 15 is used for ensuring the reaction temperature in the electrolytic cell, and the material thereof is heat preservation cotton, and the schematic structural diagram thereof is shown in fig. 9.
Claims (8)
1. A novel high-temperature electrochemical urea electrolytic cell device is characterized in that: comprises a cathode plate (1), a cathode runner (2), an anode plate (3), an anode runner (4), a cathode gas diffusion layer (5), a cathode catalyst layer (6), a common gasket (7), a cathode electrolyte chamber gasket (8), a cathode electrolyte layer (9), a solid electrolyte layer (10), an anode catalyst layer (11), an anode gas diffusion layer (12), a heating system (13), a high-temperature compression screw (14) and an electrolytic cell incubator (15),
a cathode runner (2) and an anode runner (4) for gas-liquid circulation are respectively carved on a cathode plate (1) and an anode plate (3) of the high-temperature electrolytic cell, a cathode runner inlet (16) and a cathode runner outlet (17) are arranged on the cathode plate (1), an anode runner inlet (18) and an anode runner outlet (19) are arranged on the anode plate (3), and a power interface (20) is arranged on each side of the anode plate; the cathode plate (1) and the anode plate (3) are separated by a common gasket (7), and a catholyte chamber gasket (8) can be additionally arranged between the common gasket (7) and the cathode plate (1) and used for storing a catholyte layer (9); the catholyte chamber gasket (8) is provided with an electrolyte inlet (21) and an electrolyte outlet (22); the cathode plate (1), the anode plate (3), the common gasket (7) and the catholyte chamber gasket (8) are fixedly connected through a high-temperature compression screw (14); heating systems (13) are arranged on the cathode plate (1) and the anode plate (3), and an electrolytic cell heat preservation box (15) is arranged outside the electrolytic cell; a closed space is formed among the cathode plate (1), the anode plate (3), the common gasket (7) and the cathode electrolyte chamber gasket (8), a catalyst layer, a gas diffusion layer, an electrolyte and an electrolyte layer are arranged in the closed space, and the cathode gas diffusion layer (5), the cathode catalyst layer (6), the cathode electrolyte layer (9), the solid electrolyte layer (10), the anode catalyst layer (11) and the anode gas diffusion layer (12) are sequentially arranged from the cathode plate (1) to the anode plate (3).
2. The new type urea electrolytic cell device for high temperature electrochemical system as claimed in claim 1, wherein: the cathode plate (1) and the anode plate (3) are round, square or rhombic.
3. The new type high temperature electrochemical urea electrolytic cell device according to claim 1, characterized in that: and a closed space is formed among the cathode plate (1), the anode plate (3), the common gasket (7) and the cathode electrolyte chamber gasket (8), a catalyst layer, a gas diffusion layer, an electrolyte and an electrolyte layer are arranged in the closed space, and the thickness sum of all layers is consistent with the thickness of the closed space.
4. The new type urea electrolytic cell device for high temperature electrochemical system as claimed in claim 1, wherein: cathode plate (1) outside is located in cathode runner import (16), cathode runner export (17), and anode runner import (18), anode runner export (19) are located the anode plate (3) outside, and catholyte chamber gasket (8) outside is located in electrolyte import (21), electrolyte export (22), and import and exit position can exchange according to actual reaction demand.
5. The new type urea electrolytic cell device for high temperature electrochemical system as claimed in claim 1, wherein: the catholyte layer (9) has the functions of ion exchange and cathode reaction selectivity enhancement, and the catholyte layer (9) has certain fluidity or is in a sheet shape without fluidity, and the thickness of the catholyte layer is consistent with that of a catholyte chamber gasket (8).
6. The new type urea electrolytic cell device for high temperature electrochemical system as claimed in claim 1, wherein: the solid electrolyte layer (10) has an ion exchange function, and the solid electrolyte layer (10) is sheet-shaped.
7. The new type urea electrolytic cell device for high temperature electrochemical system as claimed in claim 1, wherein: the anode flow channel (4) is one or more than two of annular, snake-shaped, parallel, cross-shaped and fold-line-shaped, and the anode gas diffusion layer (12) and the anode catalyst layer (11) are sheet-shaped.
8. The new type urea electrolytic cell device for high temperature electrochemical system as claimed in claim 1, wherein: the cathode flow channel (2) is one or more than two of annular, snake-shaped, parallel, cross-shaped and fold-line-shaped, and the cathode gas diffusion layer (5) and the cathode catalyst layer (6) are sheet-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123003138.1U CN217378044U (en) | 2021-12-02 | 2021-12-02 | Novel high-temperature electrochemical urea electrolytic cell device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123003138.1U CN217378044U (en) | 2021-12-02 | 2021-12-02 | Novel high-temperature electrochemical urea electrolytic cell device |
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| Publication Number | Publication Date |
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| CN217378044U true CN217378044U (en) | 2022-09-06 |
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| CN202123003138.1U Active CN217378044U (en) | 2021-12-02 | 2021-12-02 | Novel high-temperature electrochemical urea electrolytic cell device |
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| CN (1) | CN217378044U (en) |
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2021
- 2021-12-02 CN CN202123003138.1U patent/CN217378044U/en active Active
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