JP7467192B2 - Apparatus for obtaining a gaseous product and method for obtaining a gaseous product - Google Patents

Description

The present invention relates to an apparatus for obtaining a gaseous product and a method for obtaining a gaseous product. More specifically, the present invention relates to an apparatus and a method for obtaining a gaseous product by chemically reacting a gaseous raw material in the presence of a catalyst.

Various proposals have been made for devices and methods for obtaining gaseous products.
For example, Patent Document 1 discloses a generation device comprising a reaction section which generates a product gas and product water in which the product gas is dissolved by an exothermic reaction of gaseous reactants, a cooling tower which cools cooling water which removes heat generated by the exothermic reaction, a cooling water circulation system which circulates the cooling water between the reaction section and the cooling tower, and a mixing means which mixes the product water generated in the reaction section into the cooling water circulation system, wherein the reaction section has a reaction tower in which an exothermic reaction takes place, a heat medium circulation system which circulates a heat medium which performs heat exchange in the reaction tower, and a heat exchanger which exchanges heat between the heat medium of the heat medium circulation system and the cooling water of the cooling water circulation system.

Patent document 2 discloses a single-shell open interstage reactor for producing acrylic acid from propylene, comprising, in order of process flow, a) a first shell-and-tube reaction stage including a plurality of reaction tubes, the reaction tubes of the first reaction stage including a first catalyst for oxidizing propylene to produce acrolein, b) an interstage heat exchanger, c) an open interstage region, and d) a second shell-and-tube reaction stage including a plurality of reaction tubes, the reaction tubes of the second reaction stage including a second catalyst for oxidizing acrolein to produce acrylic acid, the reaction tubes of the second reaction stage having a diameter of more than 22.3 mm.

Patent Document 3 discloses a multi-tube heat exchanger that includes a group of inner tubes (heat transfer tubes) through which a first fluid passes and an outer tube (body) through which a second fluid passes, and in which a plurality of heat transfer tubes are arranged with their ends held by inlet-side and outlet-side holding plates located on the first fluid inlet side and first fluid outlet side, respectively, and is characterized in that plate-shaped or knob-shaped protrusions are formed at predetermined intervals (predetermined pitch) in the longitudinal direction on the wall surface of the flow path of each of the heat transfer tubes.

WO2019/082538A1 JP 2018-111696 A JP 2002-181468 A

The object of the present invention is to provide a new apparatus and method for chemically reacting a gaseous raw material in the presence of a catalyst to obtain a gaseous product.

In order to solve the above problems, the present invention has been completed, which includes the following aspects:

[1] A reaction tube having a gas inlet and a gas outlet at both ends and a reaction tube bore communicating from the gas inlet to the gas outlet;
a heat transfer medium tube having a heat transfer medium inlet and a heat transfer medium outlet, the heat transfer medium tube having a heat transfer medium tube lumen communicating from the heat transfer medium inlet to the heat transfer medium outlet,
The reaction tube is
The radial cross section is flat,
A catalyst is placed in the reaction tube inner cavity, and a mechanism is provided in which a gaseous raw material flows into the reaction tube inner cavity at a gas inlet, the gaseous raw material is brought into contact with the catalyst in the reaction tube inner cavity to cause a chemical reaction, and a gas containing a gaseous product obtained by the chemical reaction flows out from the reaction tube inner cavity at a gas outlet,
The heat transfer medium tube is
The heat transfer medium flows into the heat transfer medium tube lumen at a heat transfer medium inlet and flows out of the heat transfer medium tube lumen at a heat transfer medium outlet, and the reaction tube is inserted into the heat transfer medium tube lumen, and the heat transfer medium in the heat transfer medium tube lumen exchanges heat with the heat transfer medium in the reaction tube lumen via the reaction tube wall.
Apparatus for obtaining gaseous products.

[2] An apparatus for obtaining a gaseous product according to [1], in which the flat shape of the radial cross section of the reaction tube is rectangular or oval.

[3] An apparatus for obtaining a gaseous product according to [1] or [2], in which the reaction tube has heat transfer fins protruding inward from the inner surface of the reaction tube wall.

[4] An apparatus for obtaining a gaseous product as described in [3], in which the heat transfer fins are provided in greater numbers on the side closer to the gas inlet than on the side closer to the gas outlet.

[5] An apparatus for obtaining a gaseous product according to any one of [1] to [4], comprising a plurality of reaction tubes, each of which is arranged so that the longitudinal directions of the flattened radial cross sections of the reaction tubes are parallel to each other.

[6] An apparatus for obtaining a gaseous product according to any one of [1] to [5],
Supplying a gaseous source material into a reaction tube lumen at a gas inlet;
The method includes: supplying a heat transfer medium to a heat transfer medium tube lumen at a heat transfer medium inlet, causing the heat transfer medium to flow through the heat transfer medium tube lumen, and discharging the heat transfer medium tube lumen at a heat transfer medium outlet, thereby performing a chemical reaction of the gaseous raw materials while controlling the temperature of the contents in the reaction tube lumen; and discharging a gas containing a gaseous product obtained by the chemical reaction from the reaction tube lumen at a gas outlet.
A method for obtaining a gaseous product.

[7] The method according to [6], wherein the gaseous raw material contains hydrogen gas and carbon dioxide gas, and the gaseous product contains carbon monoxide, methanol, or methane.

The apparatus and method for obtaining a gaseous product of the present invention can uniformly control the temperature distribution in the reaction tube within a predetermined range, and can prevent problems related to hot spots. The apparatus and method for obtaining a gaseous product of the present invention are preferably used in chemical reactions that use _CO2 to produce methane gas and water.

FIG. 1 is a diagram showing an example of an apparatus for obtaining a gaseous product of the present invention. FIG. 1 is a diagram showing an example of a reactor. FIG. 3 is a view of the reactor shown in FIG. 2 as seen from the gas inlet side. FIG. 4 is a cross-sectional view of the reactor shown in FIG. 3 along line AA. FIG. 4 is a diagram showing a cross section of the reactor shown in FIG. 3 along the line B-B. FIG. 2 is a view of another example of a reactor as viewed from the gas inlet side. FIG. 2 is a view of another example of a reactor as viewed from the gas inlet side. FIG. 2 is a view of another example of a reactor as viewed from the gas inlet side. FIG. 2 is a diagram showing an example of a reaction tube. FIG. 10 is a view showing a CC cross section of the reaction tube shown in FIG. FIG. 10 is a view showing a cross section of the reaction tube shown in FIG. 9 along the line DD. FIG. 13 is a view showing a CC cross section of another example of the reaction tube. FIG. 13 is a view showing a CC cross section of another example of the reaction tube. FIG. 13 is a view showing a CC cross section of another example of the reaction tube. FIG. 13 is a view showing a CC cross section of another example of the reaction tube. FIG. 13 is a view showing a CC cross section of another example of the reaction tube. FIG. 13 is a view showing a CC cross section of another example of the reaction tube. FIG. 2 is a cross-sectional view of another example of a reactor. FIG. 2 is a diagram showing another example of a reactor. FIG. 2 is a cross-sectional view of another example of a reactor.

The present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments shown in the drawings.

The apparatus 1 for obtaining a gaseous product of the present invention has a reactor 10. The reactor 10 has a reaction tube 12 and a heat transfer medium tube 13.

The heat transfer medium tube 13 has a heat transfer medium inlet 16 and a heat transfer medium outlet 17, and has a heat transfer medium tube lumen 24 that connects the heat transfer medium inlet 16 to the heat transfer medium outlet 17. The radial cross section of the heat transfer medium tube can be, for example, a circle, an oval, an ellipse, an oval, a rounded rectangle, a rectangle, etc.

The reaction tube 12 has a gas inlet 4 and a gas outlet 5 at both ends, and a reaction tube lumen 23 that communicates from the gas inlet 4 to the gas outlet 5. The reaction tube has a flat radial cross section. The flat shape is preferably a rectangle (rectangle, rounded rectangle) or an oval (egg, oval, ellipse). The aspect ratio of the flat shape (longitudinal length/shortitudinal length) is preferably 1.1 at the lower limit, more preferably 1.5, and even more preferably 2 at the upper limit, and preferably 20, more preferably 10, and even more preferably 4 at the upper limit. In the apparatus of the present invention, it is preferable that there are a plurality of reaction tubes 12, and each reaction tube is preferably arranged so that the longitudinal directions of the flat shapes of their radial cross sections are parallel to each other. The thicknesses of the reaction tubes may be the same or different. Examples of the arrangement of the reaction tubes include a mode in which the reaction tubes are arranged vertically and horizontally in multiple rows in the heat transfer medium tube lumen 24 whose radial cross section is a rounded rectangle as shown in FIG. 3, a mode in which the reaction tubes are arranged vertically in a single row in the heat transfer medium tube lumen 24 whose radial cross section is a rounded rectangle as shown in FIG. 6, a mode in which the reaction tubes are evenly arranged in the heat transfer medium tube lumen 24 whose radial cross section is a circle as shown in FIG. 7, and a mode in which the reaction tubes are arranged vertically in a single row in the heat transfer medium tube lumen 24 whose radial cross section is a circle as shown in FIG. 8.

The gas inlet 4 is distinguished from the heat transfer medium inlet 16 or the heat transfer medium outlet 17, and the gaseous raw material 8 flows into the reaction tube bore 23 at the gas inlet 4. The gas inlet 4 can be distinguished from the heat transfer medium inlet 16 or the heat transfer medium outlet 17 by, for example, a plate 25 that holds the end of the reaction tube on the gas inlet side.

Upstream of the reactor 10, devices for preparing the gaseous raw material, such as a mixing mechanism for mixing the components constituting the gaseous raw material in a predetermined ratio, tanks for storing the components constituting the gaseous raw material, a compressor 11, a heat exchanger 22, etc., can be installed. If the raw material is liquid, such as liquefied carbon dioxide, an evaporator 14 or the like can be provided to safely vaporize it. The components constituting the gaseous raw material can be appropriately selected depending on the chemical reaction to be performed in the reactor. For example, the gaseous raw material used in the methanation reaction of carbon dioxide contains at least hydrogen gas and carbon dioxide gas. The amount of gaseous raw material 8 flowing into the reaction tube lumen 23 can be appropriately set depending on the chemical reaction to be performed in the reactor 10.

The heat transfer medium 19 flows into the heat transfer medium tube lumen 24 at the heat transfer medium inlet 16. The heat transfer medium 19 is not particularly limited as long as it does not change in quality and maintains its fluidity in the temperature range for the desired chemical reaction. Specific examples of heat transfer media include polyhydric alcohols such as glycerin and polyglycol; phenols and phenolic ethers such as anisole, diphenyl ether, and phenol; polyphenyls such as terphenyl, chlorinated benzenes and chlorinated polyphenyls such as o-dichlorobenzene and polychloropolyphenyl; silicate esters such as tetraallyl silicate; fractionated tar and petroleum such as naphthalene derivatives and mineral oil; nitrates and nitrites (heat transfer salts) such as sodium nitrate, sodium nitrite, and potassium nitrate; silicones; fluorine compounds; glycols; molten metals and alloys such as Na metal, K metal, Pb metal, Pb-Bi eutectic mixture, and Na-K alloy; and the like.

The heat transfer medium inlet 16 and the heat transfer medium outlet 17 are not particularly limited in their arrangement, but are preferably arranged as shown in FIG. 3 or 6 to 8 so that the heat transfer medium can easily flow in a direction parallel to the longitudinal plane (the wider projection plane of the reaction tube as shown in FIG. 4) of the flat shape of the radial cross section of the reaction tube. Also, a partition plate 27 as shown in FIG. 20 can be provided to make the flow path meander so that the heat transfer medium can easily flow in a direction perpendicular to the shorter side plane (the narrower projection plane of the reaction tube as shown in FIG. 5) of the flat shape of the radial cross section of the reaction tube. Also, a spiral partition plate may be provided to guide the heat transfer medium to flow in a spiral shape along the inner surface of the heat transfer medium tube wall. The partition plate can have a hole through which the reaction tube can pass so as to hold the middle part of the reaction tube.

A catalyst is placed in the reaction tube bore 23, and the gaseous raw material is brought into contact with the catalyst in the reaction tube bore to cause a chemical reaction.
The catalyst may be in any shape, such as powder, granules, pellets, flat plate, corrugated plate, corrugated, honeycomb, etc. The catalyst may be loaded or filled into the reaction tube inner cavity 23, or may be attached to the inner surface of the reaction tube wall.

The reaction tube may have a clamping portion protruding inward from the inner surface of the reaction tube wall in order to stabilize the position of the plate-shaped catalyst when it is loaded. The shape and number of the clamping portion are not particularly limited, and examples include a clamping portion having protrusions facing each other in a staggered manner as shown in Figures 12 and 13, a clamping portion having protrusions facing each other as shown in Figures 14 and 15, and a clamping portion having T-shaped protrusions facing each other in a staggered manner as shown in Figures 16 and 17. The clamping portion can be made of a material with high thermal conductivity and placed in contact with the plate-shaped catalyst to serve as a heat transfer fin 2, which will be described later.

The catalyst can be appropriately selected depending on the chemical reaction to be carried out in the reactor. For example, in the methanation reaction of carbon dioxide, Ni-based catalysts, platinum group metal-based catalysts, other precious metal-based catalysts, etc. can be used. Specific examples of methanation catalysts include nickel aluminate (NiAl _x O _y ), Ru/NiAl _x O _y , Ru/Al ₂ O ₃ , Ru/TiO ₂ , Ni/TiO ₂ , Ru-Ni/TiO ₂ , etc.

The gas outlet 5 is distinguished from the heat transfer medium inlet 16 or the heat transfer medium outlet 17, and the gas 9 containing the gaseous product flows out from the reaction tube lumen 23 at the gas outlet 5. The gas outlet 5 and the heat transfer medium inlet 16 or the heat transfer medium outlet 17 can be distinguished, for example, by a plate 26 that holds the end of the reaction tube on the gas outlet side. The heat transfer medium 20 flows out from the heat transfer medium tube lumen 24 at the heat transfer medium outlet 17. The flowed out heat transfer medium 20 can be recycled.

The gas 9 containing the gaseous products flowing out from the gas outlet 5 may contain unreacted gaseous raw materials, gaseous by-products, etc. in addition to the gaseous products. The gaseous products obtained in the methanation reaction of carbon dioxide are methane and water vapor. Downstream of the reactor 10, a device for separating and purifying useful gaseous products (methane in the methanation reaction) from the gas 9, such as a cooler, a condenser, a gas-liquid separator, a membrane separation device, an adsorption separation device, an absorption separation device, a distillation separation device, a cryogenic separation device, etc., may be installed. The unreacted gaseous raw materials obtained in the separation and purification can be recycled. Water vapor can be recycled as cooling water, etc.

The reaction tube 12 is inserted into the heat transfer medium tube lumen 24, and has a mechanism for heat exchange between the heat transfer medium 19 in the heat transfer medium tube lumen 24 and the inside of the reaction tube lumen 23 via the reaction tube wall. The reaction tube 12 preferably has heat transfer fins 2 protruding inward from the inner surface of the reaction tube wall. The reaction tube may further have heat transfer fins protruding outward from the outer surface of the reaction tube wall.

Generally, in a tubular reactor, the temperature distribution in the flow direction of the reaction tube is easily non-uniform. In a chemical reaction that generates a large amount of heat, hot spots may occur. It is preferable to suppress the occurrence of hot spots and to make the temperature distribution in the flow direction of the reaction tube uniform.
As shown in FIG. 2 and FIG. 19, the heat transfer medium inlet 16 can be installed near the part where hot spots may occur. As shown in FIG. 18, the heat transfer medium tube lumen can be divided by a partition plate 27, and a heat transfer medium inlet and a heat transfer medium outlet can be provided for each divided part. The heat transfer medium flowing through the divided heat transfer medium tube lumen can be made relatively lower in temperature or relatively higher in flow rate on the side near the part where hot spots may occur than in other parts. In addition, by providing more heat transfer fins near the part where hot spots may occur and increasing the amount of heat transfer in that part, the temperature distribution in the flow direction of the reaction tube can be made uniform. For example, more heat transfer fins may be provided on the part near the gas inlet 4 than on the part near the gas outlet 5.

The heat transfer fins may be provided only on the part of the catalyst that is closer to the gas inlet 4, or only on the part of the catalyst that is closer to the gas outlet 5, or may be provided over the entire catalyst area. For example, in a reaction tube in which heat transfer fins are provided only on the part of the catalyst that is closer to the gas inlet 4, FIG. 10 shows a cross section (C-C cross section) of the reaction tube 12 filled with granular catalyst on the side closer to the gas inlet 4, and FIG. 11 shows a cross section (D-D cross section) of the reaction tube 12 filled with granular catalyst on the side closer to the gas outlet 5.

The apparatus for obtaining the gaseous product of the present invention is not particularly limited by its manufacturing method. For example, it can be manufactured by preparing a reaction tube, a heat transfer medium tube, and accessories, and assembling them by welding, screwing, etc.

Reaction tubes, heat transfer medium tubes, accessories, or reactors with complex shapes can be manufactured using a method that involves laminating their cross-sectional shapes based on their 3D data to form a single metal three-dimensional object.

The 3D data may be 3D shape data of the target part. The 3D shape data can be designed using 3D CAD. The 3D data may be, for example, STL (Stereolithography) data obtained by converting the 3D shape data. STL data represents a three-dimensional solid shape as a collection of small triangles (polygons).

The formation (shaping) of a metallic three-dimensional object by layering cross-sectional shapes can be performed by the powder bed fusion (PBF) method, the metal deposition method, the fluid extrusion deposition modeling (FDM) method, the liquid metal inkjet method, the binder jet method, and a hybrid method in which cutting is performed during layered modeling by PBF. Of these, the powder bed fusion (PBF) method or the metal deposition method are preferred.

The powder bed fusion method involves spreading metal powder and melting and solidifying the area to be shaped using a heat source such as a laser or electron beam. The metal powder is spread out and then repeatedly melted and solidified to create a shape. After shaping is complete, the unsolidified powder is removed to extract the model.

Powder bed fusion methods include the laser beam heat source method and the electron beam heat source method.

The powder bed laser beam heat source method uses a laser beam to irradiate a spread out metal powder material, causing it to melt, solidify or sinter, resulting in additive manufacturing. With the laser beam heat source method, melting and solidification usually occurs in an inert atmosphere such as nitrogen. With the laser beam heat source method, positioning when irradiating the laser is performed by changing the angle of a mirror.

The powder bed/electron beam heat source method converts kinetic energy into heat by irradiating and colliding an electron beam onto a spread-out metal powder material in a high vacuum, melting the powder. With the electron beam heat source method, melting and solidifying usually occurs in a vacuum. With the electron beam heat source method, the direction of the electron beam is changed using a lens that uses a magnetic field. As a result, the electron beam heat source method allows for high-speed positioning.

The metal deposition method is a method of forming objects by layering and solidifying molten metal material in a specified location. The metal deposition method does not require the removal of powder after the object is formed.

Metal deposition methods include the laser beam heat source method, which uses metal powder as the material, and the arc discharge method, which uses alloy wire as the material.

The metal deposition laser beam heat source method sprays metal powder from a nozzle and simultaneously irradiates it with laser light, supplying the metal powder to a molten pool where it solidifies to create a shape. Three-dimensional shapes are drawn by moving the melting nozzle or stage. By switching the metal powder supply path, dissimilar metals can be formed. The large laser output makes it suitable for high-speed modeling.

The metal deposition arc discharge method melts a metal wire using an arc discharge at the tip of the wire, then layers it to create a shape. The equipment and material costs are relatively low, and high speed modeling is possible.

After shaping, the product can be heat-treated to relieve stress, improve strength, etc. The conditions for heat treatment, such as temperature, time, and atmosphere, can be set appropriately depending on the metal material used, etc.

The method for obtaining a gaseous product of the present invention includes, in the apparatus for obtaining a gaseous product of the present invention, supplying a gaseous raw material to the reaction tube lumen at a gas inlet, supplying a heat transfer medium to the heat transfer medium tube lumen at the heat transfer medium inlet, flowing the heat transfer medium into the heat transfer medium tube lumen, and discharging the heat transfer medium from the heat transfer medium tube lumen at a heat transfer medium outlet, thereby performing a chemical reaction of the gaseous raw material while controlling the temperature of the contents in the reaction tube lumen, and discharging a gas containing the gaseous product obtained by the chemical reaction from the reaction tube lumen at a gas outlet.

In a method for producing CO (carbon monoxide), methanol or methane, a gas containing CO ₂ (carbon dioxide) and H ₂ (hydrogen) is used as a gaseous raw material, and a reduction reaction of CO ₂ is carried out.
The amount of gas containing _CO2 and _H2 to be introduced can be appropriately set depending on the reaction rate, the volume of the reaction tube inner cavity, etc.
Depending on the ratio of _CO2 to _H2 , the reduction reaction of _CO2 proceeds as follows:
_CO2 + _H2 → CO + _H2O
CO2 + _3H2 → _CH3OH + _H2O
CO2 + _4H2 → _CH4 + _2H2O

The apparatus and method for obtaining a gaseous product of the present invention can be _preferably used for C1 chemical synthesis methods other than the method for producing CO (carbon monoxide), methanol, or methane from a gas containing CO ₂ (carbon dioxide) and H 2 (hydrogen). Examples of C1 chemical synthesis methods include a method for producing carbon monoxide and hydrogen by reacting methane with water (steam), a method for producing carbon monoxide and hydrogen by reacting methane with carbon dioxide, a method for producing carbon dioxide and hydrogen by reacting carbon monoxide with water, a method for producing carbon dioxide and hydrogen by reacting methane with water, a method for producing methane and carbon dioxide by reacting carbon monoxide with hydrogen, a method for producing methanol by reacting carbon monoxide with hydrogen, a method for producing acetone and water by reacting carbon monoxide with hydrogen, and a method for producing carbon monoxide and hydrogen, ethylene and water, or methanol by reacting methane with oxygen.

In the present invention, the products (CO (carbon monoxide), methanol or methane) obtained by the reduction reaction of _CO2 and the unreacted substances (mainly _CO2 ) can be separated and purified. Examples of the separation and purification method include membrane separation, adsorption separation, absorption separation, distillation separation, and cryogenic separation. In the separation and purification of methane, the membrane separation method is preferred from the viewpoints of separation selectivity, separation speed, and inexpensive and compact equipment.
The unreacted material (mainly CO ₂ ) and low-concentration methane obtained in the separation and purification of methane can be used as a gaseous raw material in the above-mentioned methane production method.

Furthermore, methane obtained by separation and purification can be supplied as fuel to a gas turbine, which can generate electricity.
The combustion exhaust gas from a gas turbine typically contains carbon dioxide and can be used as the gaseous feedstock in the methane production process.

The present invention can be used in various chemical reactions. The present invention is useful in utilizing hydrogen produced by electrolysis of water, utilizing carbon dioxide produced by human or animal respiration or by combustion of fuel, producing water, or producing methane as a fuel. The present invention can also be used in space stations, spacecraft, rockets, etc.

1: Apparatus for obtaining gaseous products
2: Heat transfer fins
3. Granular catalyst
4: Gas inlet
5: Gas outlet
6: Plate-shaped catalyst (flat plate)
7: Plate-shaped catalyst (corrugated plate)
8. Gaseous raw materials
G1: Raw gas
LG2: Liquefied feed gas
9: Gas containing gaseous products
10: Reactor
11: Compressor
12: Reaction tube
13: Heat transfer medium tube
14: Evaporator
15: Cooler
16: Heat transfer medium inlet
17: Heat transfer medium outlet
18: Gas-liquid separator
19: Heat transfer medium (inlet)
20: Heat transfer medium (outflow)
21: Drain
22: Heat exchanger
23: Reaction tube inner cavity
24: Heat transfer medium tube bore
25: Inlet side retaining plate
26: Outlet side retaining plate
27: Partition

Claims (7)

a reaction tube having a gas inlet and a gas outlet at both ends and having a reaction tube bore communicating from the gas inlet to the gas outlet;
a heat transfer medium tube having a heat transfer medium inlet and a heat transfer medium outlet, the heat transfer medium tube having a heat transfer medium tube lumen communicating from the heat transfer medium inlet to the heat transfer medium outlet,
The reaction tube is
The radial cross section is flat,
A clamping portion protruding inward from the inner surface of the reaction tube wall,
a plate-shaped catalyst is sandwiched between the sandwiching parts and placed in the reaction tube lumen such that the plate surface of the plate-shaped catalyst is aligned along the longitudinal direction of the reaction tube; and a mechanism is provided in which a gaseous raw material flows into the reaction tube lumen at a gas inlet, the gaseous raw material is brought into contact with the plate-shaped catalyst in the reaction tube lumen to cause a chemical reaction, and a gas containing a gaseous product obtained by the chemical reaction flows out from the reaction tube lumen at a gas outlet,
The heat transfer medium tube is
The heat transfer medium flows into the heat transfer medium tube lumen at a heat transfer medium inlet and flows out of the heat transfer medium tube lumen at a heat transfer medium outlet, and the reaction tube is inserted into the heat transfer medium tube lumen, and the heat transfer medium in the heat transfer medium tube lumen exchanges heat with the heat transfer medium in the reaction tube lumen via the reaction tube wall.
Apparatus for obtaining gaseous products. 2. The apparatus for obtaining a gaseous product according to claim 1, wherein the flat shape of the radial cross section of the reaction tube is a rectangle or an oval. The apparatus for obtaining a gaseous product according to claim 1 or 2, wherein the reaction tube has heat transfer fins protruding inward from the inner surface of the reaction tube wall. The apparatus for producing a gaseous product according to claim 3, wherein the heat transfer fins are provided in greater numbers on the side closer to the gas inlet than on the side closer to the gas outlet. An apparatus for obtaining a gaseous product according to any one of claims 1 to 4, comprising a plurality of reaction tubes, each of which is arranged so that the longitudinal directions of the flattened radial cross sections of the reaction tubes are parallel to each other. A device for obtaining a gaseous product according to any one of claims 1 to 5,
Supplying a gaseous source material into a reaction tube lumen at a gas inlet;
The method includes: supplying a heat transfer medium to a heat transfer medium tube lumen at a heat transfer medium inlet, causing the heat transfer medium to flow through the heat transfer medium tube lumen, and discharging the heat transfer medium tube lumen at a heat transfer medium outlet, thereby performing a chemical reaction of the gaseous raw materials while controlling the temperature of the contents in the reaction tube lumen; and discharging a gas containing a gaseous product obtained by the chemical reaction from the reaction tube lumen at a gas outlet.
A method for obtaining a gaseous product. 7. The method of claim 6, wherein the gaseous feedstock comprises hydrogen gas and carbon dioxide gas, and the gaseous product comprises carbon monoxide, methanol or methane.

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