A reactor unit for high temperature thermal catalysis and electrothermal catalysis

Abstract

A reactor unit for high-temperature thermal catalysis and electrothermal catalysis, an isolation film is arranged between a first support seat and a second support seat, a first insulation ring constituting a first reaction chamber with the isolation film is arranged in the middle of the inside of the first support seat, an electrode slot is arranged on the first insulation ring, a first electrode insertion hole is arranged in the middle of the first support seat and is communicated with the first reaction chamber, a first electrode passes through the electrode insertion hole and the electrode slot into the first reaction chamber in sequence; a second insulation ring constituting a second reaction chamber with the isolation film is arranged in the middle of the second support seat, an electrode slot is arranged on the second insulation ring, a second electrode insertion hole is arranged in the middle of the second support seat and is communicated with the second reaction chamber, a second electrode passes through the electrode insertion hole and the electrode slot into the second reaction chamber in sequence. The present application can greatly improve the energy utilization rate by carrying out two groups of catalytic reactions under the same heat source condition.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electrochemical reaction, and particularly relates to a reactor for high-temperature thermal catalysis and electrothermal catalysis. BACKGROUND

[0002] In the chemical industry, high-temperature reactions of gases, such as dehydrogenation of low-carbon alkanes, reforming of methane and CO2 to produce synthesis gas, and reverse water-gas shift, are mostly carried out in fixed-bed reactors or tubular reactors. The reactors generally include a catalyst support layer (such as quartz sand), a catalyst layer, and a packing layer (such as quartz sand). Fixed-bed reactors can be used for large-scale chemical production. However, a single reactor can only perform one reaction, and it is difficult to couple two reactions or evaluate two catalyst systems at one time. This is relatively inefficient for preliminary research such as catalyst screening in a laboratory. At the same time, under high-temperature reaction conditions, single catalytic reactions or catalyst evaluations result in low energy utilization. Under the condition of providing only one heat source, by designing the reactor to enable independent reactions of two gases, the energy utilization can be improved, the interference between different reactions can be reduced, the cost of gas product separation can be reduced, and the catalyst evaluation efficiency can be improved. Therefore, it is of great significance.

[0003] In addition, with the development of electrocatalysis technology, in recent years, room-temperature electrocatalysis technology has been widely used in the fields of CO2 reduction and water electrolysis, and important research progress has been made. However, for some electrocatalytic reactions, the catalytic activity is low under normal temperature conditions, making it difficult to realize industrial application. The electrocatalytic performance under high-temperature conditions is greatly different from that under room temperature, and shows characteristics such as high catalytic activity and high energy utilization. However, the reaction device of a high-temperature electrocatalytic system is different from that of a room-temperature electrocatalytic device, and the design of the reaction device has a great influence on the catalytic reaction. Under high-temperature conditions, how to assemble the electrothermal catalytic system reactor is one of the current research focuses. Therefore, designing a reactor for high-temperature electrocatalytic reaction is of great significance for the development of electrothermal catalysis technology. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a reactor for high-temperature thermal catalysis and electrothermal catalysis, which has a simple structure, is easy to assemble, and can selectively use a single reaction chamber or a double reaction chamber.

[0005] The technical scheme adopted to solve the above technical problems is: a reactor unit for high-temperature thermal catalysis and electric thermal catalysis, a gas-tight isolation film is arranged between first support seats and second support seats with the same structure, a mounting groove is processed in the middle of one side of the first support seat close to the isolation film, a first insulation ring is matched and arranged in the mounting groove, the first insulation ring and the isolation film form a first reaction chamber, an electrode slot is arranged on the sidewall of the first insulation ring, a first gas inlet pipe and a first gas outlet pipe are arranged in the middle of one side of the first support seat away from the isolation film, the first gas inlet pipe and the first gas outlet pipe are communicated with the first reaction chamber, electrode insertion holes corresponding to the electrode slots are arranged on the first support seat on the radial outer side of the mounting groove, and a first electrode sequentially passes through the electrode insertion holes and the electrode slots and enters the first reaction chamber; a mounting groove is processed in the middle of one side of the second support seat close to the isolation film, a second insulation ring is matched and arranged in the mounting groove, the second insulation ring and the isolation film form a second reaction chamber, an electrode slot is arranged on the sidewall of the second insulation ring, a second gas inlet pipe and a second gas outlet pipe are arranged in the middle of one side of the second support seat away from the isolation film, the second gas inlet pipe and the second gas outlet pipe are communicated with the second reaction chamber, electrode insertion holes corresponding to the electrode slots are arranged on the second support seat on the radial outer side of the mounting groove, and a second electrode sequentially passes through the electrode insertion holes and the electrode slots and enters the second reaction chamber.

[0006] As a preferred technical scheme, the first insulation ring and the second insulation ring are both ceramic rings.

[0007] As a preferred technical scheme, the isolation film is a solid oxide electrolyte film after high-temperature calcination.

[0008] As a preferred technical scheme, the materials of the first support seat and the second support seat are both stainless steel.

[0009] As a preferred technical scheme, an insulation sleeve is arranged between the first electrode and the first support seat, and an insulation sleeve is arranged between the second electrode and the second support seat.

[0010] As a preferred technical scheme, the joints of the first support seat and the second support seat are sealed with ceramic glue.

[0011] As a preferred technical scheme, the first support seat and the second support seat are fixed through bolts and nuts.

[0012] As a preferred technical scheme, the bottom surfaces of the mounting grooves of the first support seat and the second support seat are covered with ceramic layers.

[0013] The beneficial effects of the present application are as follows:

[0014] The first support seat and the second support seat are provided with an air-tight isolation film, the first support seat is provided with a first reaction chamber, and the second support seat is provided with a second reaction chamber, so that two groups of catalytic reactions can be carried out under the same heat source condition, and the energy utilization rate can be greatly improved. Compared with the existing electric heating catalytic device, the present application is assembled by using modular accessories, and is easy to assemble and disassemble. In addition, according to the actual application, a single reaction chamber or a double reaction chamber structure can be selectively selected and applied to the electric heating catalytic reaction, and can be expanded and applied to the fields of solid oxide electrolysis cells and solid oxide fuel cells. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the present application.

[0016] Figure 2 is a left view of Figure 1 .

[0017] Among them, the first support seat 1, the first insulating ring 2, the ceramic glue 3, the second support seat 4, the bolt nut 5, the second insulating ring 6, the second reaction chamber 7, the second air inlet pipe 8, the isolation film 9, the second air outlet pipe 10, the insulating sleeve 11, the second electrode 12, the first electrode 13, the first air outlet pipe 14, the first reaction chamber 15, the first air inlet pipe 16, and the ceramic layer 17. DETAILED DESCRIPTION

[0018] The present application will be further described in detail below in combination with the drawings and examples, but the present application is not limited to the following embodiments.

[0019] In Figure 1 , 2 , the reactor unit for high-temperature thermal catalysis and electric heating catalysis of the present embodiment is composed of the first support seat 1, the second support seat 4, the isolation film 9, the first insulating ring 2, the first air inlet pipe 16, the first air outlet pipe 14, the first electrode 13, the second insulating ring 6, the second air inlet pipe 8, the second air outlet pipe 10, and the second electrode 12.

[0020] The first support seat 1 is a stainless steel cylinder, the second support seat 4 is the same structure as the first support seat 1, a gas-tight isolation film 9 is installed between the first support seat 1 and the second support seat 4, the isolation film 9 is a solid oxide electrolyte film after high-temperature baking, used for preventing deformation during the heating process, the isolation film 9 has a smaller diameter than the first support seat 1, a circular mounting groove is processed in the middle of the side of the first support seat 1 close to the isolation film 9, the mounting groove has a smaller diameter than the isolation film 9, a first insulating ring 2 is matched and installed in the mounting groove, the first insulating ring 2 is a ceramic ring, the height of the first insulating ring 2 is greater than the depth of the mounting groove, the first insulating ring 2 and the isolation film 9 form a first reaction chamber 15, an electrode groove is processed on the side wall of the first insulating ring 2, a first gas inlet pipe 16 and a first gas outlet pipe 14 are installed on the side of the first support seat 1 away from the isolation film 9, the first gas inlet pipe 16 and the first gas outlet pipe 14 are communicated with the first reaction chamber 15, electrode insertion holes corresponding to the electrode groove are axially processed on the radial outer side of the first support seat 1 above the mounting groove, a first electrode 13 passes through the electrode insertion holes and the electrode groove into the first reaction chamber 15 in sequence, and an insulating sleeve 11 is installed between the first electrode 13 and the first support seat 1.

[0021] A circular mounting groove is processed in the middle of the side of the second support seat 4 close to the isolation film 9, the mounting groove has a smaller diameter than the isolation film 9, a second insulating ring 6 is matched and installed in the mounting groove, the second insulating ring 6 is a ceramic ring, the height of the second insulating ring 6 is greater than the depth of the mounting groove, the second insulating ring 6 and the isolation film 9 form a second reaction chamber 7, an electrode groove is processed on the side wall of the second insulating ring 6, a second gas inlet pipe 8 and a second gas outlet pipe 10 are processed in the middle of the side of the second support seat 4 away from the isolation film 9, the second gas inlet pipe 8 and the second gas outlet pipe 10 are communicated with the second reaction chamber 7, electrode insertion holes corresponding to the electrode groove are axially processed on the radial outer side of the second support seat 4 above the mounting groove, a second electrode 12 passes through the electrode insertion holes and the electrode groove into the second reaction chamber 7 in sequence, and an insulating sleeve 11 is arranged between the second electrode 12 and the second support seat 4.

[0022] The first support seat 1 and the second support seat 4 are fixed through bolts and nuts 5, the joint of the first support seat 1 and the second support seat 4 is sealed with ceramic glue 3, so as to prevent gas leakage of the reaction chamber.

[0023] The contact surface of the first support seat 1 and the second support seat 4 with the isolation film 9 and the bottom surface of the mounting groove of the first support seat 1 and the second support seat 4 are covered with a ceramic layer 17, so as to prevent the influence of metal on the reaction in the catalytic reaction process.

[0024] When the present application is used for thermal catalytic reaction at 500-900 DEG C, the catalyst is coated in the first insulating ring 2 and the second insulating ring 6 on both sides of the isolation film 9, the gas is introduced into the first reaction chamber 15 and the second reaction chamber 7 through the first gas inlet pipe 16 and the second gas inlet pipe 8 respectively, and the thermal catalytic reaction can be realized under the condition that the gas contacts with the catalyst at high temperature.

[0025] When the application is used for electrothermal catalytic reaction at 500-900℃, the first electrode 13 and the second electrode 12 are platinum wire electrodes, and the corresponding catalysts are coated on the two sides of the isolation film 9 within the first insulating ring 2 and the second insulating ring 6, and the gases are introduced into the first reaction chamber 15 and the second reaction chamber 7 through the first gas inlet pipe 16 and the second gas inlet pipe 8 respectively, and the catalysts and the platinum wire electrodes form electrodes containing catalysts, and high-temperature electrocatalytic reaction can be realized under the application of voltage.

[0026] The two reaction chambers of the application exist independently, and different reactions can be carried out at the same time, which is conducive to the efficient use of energy.

[0027] The application can also be used for low-temperature thermal catalytic reaction. The reactions involved include but are not limited to low-carbon alkane oxidative dehydrogenation, methane and CO2 reforming, Fischer-Tropsch synthesis, reverse water gas shift, etc., and when it is used for electrothermal catalysis, it can be used for high-temperature electrolysis, etc. The related technical personnel in the technical field to which the application belongs can revise, replace, transform, etc. according to the technology of the application, which are all included in the protection scope of the application.

Claims

1. A reactor unit for high-temperature thermocatalysis and electrothermal catalysis, characterized in that: An airtight isolation membrane is provided between a first support base and a second support base with identical structures. A mounting groove is machined in the middle of the side of the first support base closest to the isolation membrane, and a first insulating ring is fitted into the mounting groove. The first insulating ring and the isolation membrane form a first reaction chamber. An electrode groove is provided on the side wall of the first insulating ring. A first air inlet pipe and a first air outlet pipe are provided in the middle of the side of the first support base away from the isolation membrane, and the first air inlet pipe and the first air outlet pipe are connected to the first reaction chamber. An electrode insertion hole corresponding to the electrode groove is provided on the radially outer side of the mounting groove on the first support base, and the first electrode passes through the electrode groove in sequence. The electrode slots are inserted into the first reaction chamber; the second support base has a mounting groove machined in the middle of the side near the isolation membrane, and a second insulating ring is matched in the mounting groove. The second insulating ring and the isolation membrane form the second reaction chamber. The side wall of the second insulating ring is provided with an electrode slot. The middle of the side of the second support base away from the isolation membrane is provided with a second air inlet pipe and a second air outlet pipe. The second air inlet pipe and the second air outlet pipe are connected to the second reaction chamber. The second support base is provided with an electrode insertion hole corresponding to the electrode slot on the radial outer side of the mounting groove. The second electrode passes through the electrode insertion hole and electrode slot in sequence to enter the second reaction chamber.

2. The reactor unit for high-temperature thermocatalysis and electrothermal catalysis according to claim 1, characterized in that: Both the first insulating ring and the second insulating ring are ceramic rings.

3. The reactor unit for high-temperature thermocatalysis and electrothermal catalysis according to claim 1, characterized in that: The separating membrane is a solid oxide electrolyte membrane calcined at high temperature.

4. The reactor unit for high-temperature thermocatalysis and electrothermal catalysis according to claim 1, characterized in that: Both the first support base and the second support base are made of stainless steel.

5. The reactor unit for high-temperature thermocatalysis and electrothermal catalysis according to claim 4, characterized in that: An insulating sleeve is provided between the first electrode and the first support base, and an insulating sleeve is provided between the second electrode and the second support base.

6. The reactor unit for high-temperature thermocatalysis and electrothermal catalysis according to claim 1 or 4, characterized in that: The joint between the first support and the second support is sealed with ceramic adhesive.

7. The reactor unit for high-temperature thermocatalysis and electrothermal catalysis according to claim 6, characterized in that: The first support and the second support are fixed together by bolts and nuts.

8. The reactor unit for high-temperature thermocatalysis and electrothermal catalysis according to claim 4, characterized in that: The bottom surfaces of the mounting grooves on both the first and second support bases are covered with a ceramic layer.

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