JPS5990714A - Wall type catalyst in heat exchangeable reaction device - Google Patents

Abstract

PURPOSE:To provide a complete combustion reaction while material quality of a reaction device wall is protected by a method wherein a catalyst layer for removing accumulated heat is arranged in a reaction device wall surface of an internal-combustion engine in which a heat circulation is performed through the reaction device wall. CONSTITUTION:An internal-combustion engine 1 is a kind of reaction device in which an oxidation reaction is performed with hydrocarbon and oxygen in air while the engine is kept at its compressed condition and a cylinder wall acting as a reaction device wall 2 and a piston wall are properly cooled to protect material quality. With the foregoing, a flame extinguishing layer is produced on the device wall 2 under a cooled condition and a catalyst layer 3 is formed on the device wall 2 in order to eliminate disadvantage in which a combustion reaction is not completely performed when the engine is started to operate in particular. In the catalyst layer 3, a low temperature contact reaction is performed to provide a complete combustion reaction. With the foregoing, material quality can be protected without destroying thermal circulation on the wall surface and temperature of the catalyst itself can be kept at its proper value.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention promotes the reaction rate of the part close to the vessel wall where the reaction is relatively slow in chemical reactions such as low-temperature catalytic combustion in which the reaction rate is high using a catalyst. On the other hand, by using the reactor wall to compensate for the excess or deficiency of reaction heat, the reaction can be carried out in a thermally stable state, and the excess or deficiency of heat can be efficiently transferred to the heat medium outside the reaction system. The purpose is to exchange heat energy, maintain the temperature of the catalyst layer at a proper temperature, and preserve the material of the reactor wall, by heat exchange through the reactor wall. or relating to a vessel wall-type catalyst in a reactor capable of heat exchange, which achieves its purpose by intermittently removing heat stored in the reactor wall; (1) heat flow through the reactor wall; A catalyst layer is provided on the inner surface of the reactor wall of the reciprocating internal combustion engine to remove the accumulated heat, and the reactant is introduced through the inlet hole in the lower wall, and the product is led out through the exhaust hole in the upper wall. A shell-and-tube type reaction vessel is constructed by establishing a plurality of heat medium pipes inside a vertical shell configured to introduce a heat medium from the bottom and discharge it to the top. , a catalyst is provided on the outer circumferential wall of the plurality of heat medium pipes to remove the accumulated heat, or (
3) A heat exchanger shell is rotatably suspended in a combustor box in which combustible dilute gas is charged from the - side and discharged from the other side, and a heat exchanger body is rotatably suspended inside the heat exchanger shell from one side. A heat storage wall of a heat exchange barrel of a reactor that can perform heat exchange by discharging the low temperature air from the other side, and at that time, the low temperature air flowing inside is exchanged with high temperature air due to the heat storage in the heat exchanger barrel wall. on the outside of
%fa means that a force medium layer is provided to remove heat accumulated by combustion of the combustible dilute gas, and as an embodiment thereof, the catalyst layer may be formed directly on a part or all of the reactor wall. is fixed, and the vertical shell has its upper and lower openings sealed with side plates, and the upper and lower sides of the upper and lower sealing plates are connected to a discharge chamber with a discharge pipe connected to the upper part and a heat medium introduction pipe connected to the lower part. The heating medium introduction chamber is sealed, or
The catalyst layer is formed either directly on the outer circumferential wall of the heat transfer pipe or by being fixed thereto.

The catalyst is layered and consists of a catalyst support, a catalyst support and a catalyst material.

The catalytic material is a platinum metal or an equivalent metal or oxide. The catalyst carrier is made of activated alumina or an equivalent material that has the function of supporting the catalyst material and increasing the specific surface area, thereby promoting the activity of the catalyst and strongly physically adhering the catalyst material to the catalyst support. It is a substance. The catalyst support is a skeleton that forms the catalyst layer, supports the catalyst material and the catalyst carrier, and preferably has the function of reducing the contact area with the reactant.

When the catalyst is formed directly on the vessel wall, the metal or ceramic that is the vessel wall is the catalyst support, and when the catalyst is fixed to the vessel wall, a metal plate or porous ceramic,
Foamed metal, nonwoven fabric, etc.

As a catalyst to be attached to the vessel wall, the prior patent application 1987-172
In the invention of No. 3, in the external wall cooling type internal combustion engine, 3
; In an internal combustion engine below about oo C or in an adiabatic type internal combustion engine, the temperature of the catalyst layer, which is as low as 1ψ2, is maintained at a stable state of approximately 8 degrees ooc, and the catalyst layer is brought into contact with the hydrocarbons in the quenching layer formed on the inner wall surface. /YL Low Temperature 1) Cause the oxidation reaction and burn it while moving the nearby fuel mixture by 4N, and propagate the reaction heat to the fuel mixture compressed in the combustion chamber to achieve efficient combustion). (・It leads to the t1 reaction and burns normally and efficiently without causing even a lean mixture to misfire,
For low-temperature catalytic combustion of general hydrocarbon compounds 10
0t) 7): A catalyst layer consisting of a catalyst that does not need to withstand the temperature above is mainly attached to the inner wall surface of the piston in the combustion chamber of a reciprocating internal combustion engine. It has been developed as a catalyst element that efficiently burns the fuel mixture in the combustion chamber of internal combustion oil j, which is fixed to the surface m1 of the body.

In contrast, in chemical reactions such as low-temperature catalytic combustion where a catalyst is used and the reaction rate is low, the present invention accelerates the reaction rate in a portion close to the vessel wall where the reaction is relatively slow. By compensating for excess or deficiency of reaction heat using the reactor wall, the reaction can be carried out in a thermally stable state, and the excess or deficiency of heat can be efficiently exchanged with a heat medium outside the reaction system. In order to make the thermal energy effective, the temperature of the catalyst layer is maintained at an appropriate temperature, and the material of the reactor wall is protected. It is very useful to be able to achieve this purpose by heat flow through the reactor or by intermittent removal of heat stored in the reactor walls.

The invention will now be explained with reference to the drawings.

This is an example. An internal combustion engine is a reactor that causes an oxidation reaction between hydrocarbons and oxygen in the air in a compressed state, and ideally, if the reaction proceeds, 002 and H26 will be produced as reaction products. The heat of reaction and the increase in the number of molecules in the product system are
! ■ψ is converted into energy. The temperature at the center of the produced gas during combustion exceeds 2000 C, but the temperature at the reactor wall (2
) The cylinder wall and piston wall are cooled to about -6oC or less in the cooling type, and to about 700C or less in the adiabatic type to protect the material.

Therefore, a flame-extinguishing layer is formed on the vessel wall (2) (due to the low temperature), and the combustion reaction does not take place completely (at the time of starting at q'f).

It is possible to preserve the material without impairing the heat flow and maintain the temperature of the catalyst itself at an appropriate temperature.

If a catalyst layer consisting of platinum 11 catalyst is used, /j07
: ~ 7-0-01 Asumi calls the cold ridges and the knee-length timbers are looked after by Yami Care et al. Further improvement in thermal efficiency becomes possible.

In the Otto cycle, there is an exhaust and intake air compression process between the combustion periods, so the heat stored in the catalyst layer of the vessel wall is
Since the reactor is cooled intermittently, the effect of an intermittent heat storage reactor described in the next section also occurs.

The next example is a reaction vessel (4) as shown in FIG.

The figure shows a so-called shell-and-tube type tube (51) through which the heat medium passes, with the outer wall of the tube (51) serving as the catalyst layer (3), and a vertical shell (4
) (111 is the reaction vessel (4), but the reverse may be used, or a reactor that enables other types of heat balance may be used. The vertical shell (4) has an upper and lower The opening is sealed with a sealing plate (61 = +61), and on the upper and lower sides of the upper and lower sealing plates, there is a discharge chamber (8) that communicates with the discharge pipe (71) at the top.
and a heat medium introduction chamber portion in which a heat medium conductor (9) is communicated with the bottom thereof are sealed. The conventional general fixed catalyst layer (3) has a honeycomb shape, a granule shape, or an A1 piece shape, and a reaction fiber or production system causes a catalytic reaction while passing through the voids, but the catalyst that contributes to the reaction is The surface of N(3) is only the surface of honeycomb, grains, and small pieces, and most of the volume is dead volume.If the special surface is made of liquid pieces, the volume of the reactor may be unnecessarily large. This causes an increase in fluid resistance. Also,
This makes it difficult to control the reaction temperature and catalyst temperature.

If the membrane catalyst layer (3) shown in the figure has an effective surface area necessary for catalytic reaction, all of these drawbacks can be solved. for example,
If the dilute concentration of combustible and harmful gas discharged from the paint booth is catalytically burned in this way, the exhaust gas will be harmless;
If the υ1 gas heated by the reaction heat is cooled using water as a heat medium, thermal energy will be effectively recovered as hot water or steam, the catalyst temperature will be maintained at an appropriate level, and the catalyst will not be deactivated by excessive temperature. It is possible to prevent this from occurring, and the material of the reaction wall can also be protected.

One example of the ``intermittent heat storage type reactor'' is the one described in the previous section for the example of a reciprocating internal combustion engine.

The next example is a regenerative reactor all having a shape similar to a rotary heat exchanger as shown in Figure 1.

For example, the surface layered catalyst layer (3) of a honeycomb type and heat storage wall 0 is filled in the rotor side Q3, and catalytic combustion is performed by passing the above-mentioned dilute and concentrated ml of combustible harmful gas through it. be. The heat of reaction is stored in the No. 2 cam, and the temperature rises to, for example, about 3307 cm. The rotor side a2 is continuously shifted to cooling =ll in the figure and is cooled by cold air, and the temperature is lowered to the temperature required to cause the next contact reaction, for example /j07:, and the cold air is heated to 330 C. The sensible heat is effectively used for combustion and drying in boilers and industrial furnaces. Thus, the catalyst layer (3) and the heat storage wall (Iv
is maintained at an appropriate temperature and functions effectively without damage, and dilute combustible harmful gases that cannot be combusted without a catalyst are combusted and rendered harmless, and thermal energy is effectively recovered.

Furthermore, when a rotary heat exchanger is used to recover heat from high-temperature exhaust gas containing combustible foreign matter such as unburned soot, the foreign matter may clog the exchanger, limiting its applicability. It becomes even more of a problem when there is a lot of moisture. If the above-mentioned method is applied at that time, catalytic combustion will occur on the vessel wall, the blockage caused by the adhesion of foreign matter will be resolved, the heat will be recovered, and the amount of heat will increase.

Therefore, in gaseous reactions in which relatively dilute hydrocarbon compounds are combusted, which is used for the purpose of this invention, the reaction in the reactor is improved by increasing the effective surface area of the catalyst layer that comes into contact with the reactants. The capacity will be large. If the pore structure of the catalyst is the same, the effective surface area increases as the apparent surface area of the catalyst layer increases. In order to increase the apparent surface area, the catalyst support may be provided with an uneven shape or the catalyst support may be made porous. All of these methods result in an increase in the thickness of the catalyst layer from a macroscopic perspective.

On the other hand, in order to increase the amount of heat passing through (per unit area) of a heat once-through reactor, the catalyst layer must have a high thermal conductivity and a small thickness.

In addition, in the case of an intermittent heat storage type reactor, it is necessary to have an appropriate amount of heat, and since there is a limit to the space velocity of the reactants, it is necessary to increase the surface area of the catalyst layer. be.

The types and specifications of catalysts (including the support that supports the catalyst layer) that are compatible with the reactions handled in this manner, the types of reactors, and the conditions of use are diverse, as are the chemical engineering designs.

The type of catalyst and its preparation method according to the present invention will be described below.

Plate metal Zi4 type catalyst In this invention, this catalyst has a thickness limitation of about 20-100μ, has a considerably high mechanical strength, and is suitable for applications where a high thermal conductivity is required. It is served to

This is an application of a catalyst preparation method that has long been used in reactions such as hydrogenation, known as Raney nickel.

Raney nickel is originally used in powder form, but examples have also been introduced where it is made into lumps and used as a fixed catalyst.

The invention provides a method for applying h
It is a surface catalyst that activates the catalyst material by eluting most of the l with alkali.

As an example, a palladium (Pd) thin plate with a thickness of 100 μm is used, and an intermetallic compound called PdAl5 is dissolved in solid solution on one side of the thin plate, so that an alloy layer with a Pd content of not more than 0% by weight has a thickness of about SOμ. An amount of aluminum (j) corresponding to
i:' After heating for a short time to such a degree that only a very small amount of the A1 layer remains, the sample is rapidly cooled in water. An alloy layer can be formed on one side under controllable conditions, and pp
I can confirm that dAls is being generated. In order to elute most of the ld from this alloy layer and obtain a Pd layer with a large specific surface area measured by the 13ET method, a large amount of j% Na
Using an OH aqueous solution, the treatment was performed under mild conditions over a long period of time to prevent AhOs from precipitating.

11 no The catalyst layer was removed.

Further, as a method for forming a Pd-h1 alloy layer on a PD thin plate, an ion plating method can be applied.

Ion plating is a vacuum evaporation method in which the substance to be evaporated (Aj in this case) is used as an anode, and the substance to be evaporated (Aj in this case) is used as an anode.
P, Bl plates) are used as cathodes, and a voltage is applied between them (evaporation It
In order to accelerate the substance ions), a high frequency wave 111. is applied between the two poles.
In this method, the vapor deposition substance (Aj) is ionized by placing it under an argon pressure of about 10 Torr, promoting the reaction of both substances on the cathode, and strengthening the adhesion.

In the present invention, this method was used to achieve the objective by vapor depositing ld on one side of a Pd thin plate to form an alloy layer of Pd and hl, and in order to form a solid solution of a compound called PdAlx. By selecting the conditions, an alloy layer of any thickness can be obtained, and it was confirmed by X-ray diffraction that PdAl5 was produced. The conditions for a cathode area of 100 cnl were an acceleration voltage between the two electrodes (too, tooov, argon pressure of 3 to 7X/117), a high frequency power of l-cow, and a cathode plate heating temperature of 2oooC.

A great advantage is that the amount (thickness) of the produced alloy layer, the size of crystal grains, and grain boundary phenomena can be easily and accurately controlled. h
Elution of 1 was performed in the same manner as above.

In addition to the above-mentioned λ method, a Pd thin plate is immersed in a solution of hl, Pd
There is also a method of spraying a solution of hl onto a thin plate, but this method has the disadvantage that it is difficult to control the desired conditions when an oxidation reaction occurs.

In addition, since Pd is even more expensive than Pt, cladding with nickel, F1, iron, and their alloys can be used to keep the thickness of the thin plate as thin as possible and maintain mechanical strength. .

In addition, although this type of catalytic layer is formed directly on the reactor wall, it is often used by preparing it separately as a catalyst and secondarily attaching it to the reactor wall.

Catalysts with porous catalyst supports This catalyst takes advantage of the highly active properties of so-called platinum metal catalysts, in which platinum metals such as platinum or palladium are supported on activated alumina, while also increasing the effective surface area in contact with reactants. In order to increase the reaction capacity of the reactor by increasing
It uses a thin layered porous media support.

The heat conduction value and the heat capacity are determined by the selection of the material, thickness, and porosity of the catalyst support.

The flux of reactants does not flow through the bed of catalyst, but rather runs parallel to the plane of the bed, υ, and is dispersed within the communicating (not closed) pores of the catalyst support.

In this invention, this catalyst is used in cases where conditions such as limited thickness and high thermal conductivity are not too strict, and where extremely high activity is required.

An example is shown below.

A slurry of a mixed glaze for quality enamel was ground using a ball mill, then dried and fired at 760 C to a thickness of 30.
A porous enamel plate having interconnected pores with an average pore diameter of 30 μ and a porosity of 30 to θ% was produced. Depending on the degree of pulverization (polishing) of the mixed glaze, the diameter and porosity of the pores can be adjusted in four ways. This enamel plate was immersed in a closed material having an average primary particle size of 0 μμ, dried, and then fired in jrOc to produce a support with a catalyst phase. The catalyst layer had an average pore diameter of about 2θμ and a porosity of 2j to 30%.

In addition, 30-jO% of the same activated acumina as above was mixed into the above-mentioned special porous enamel glaze to form a slurry.
A support with a carrier having a thickness of 30μ was obtained. As a result of microscopic inspection, it was found that the activated alumina was well dispersed, supported and fixed by the sintering points of the glaze, and no enlargement of crystals was observed. Also X
Linear diffraction revealed that active alumina did not undergo any transition and remained γ-alumina.

The characteristics of this case are that the catalyst carrier can be firmly fixed to the support, and compared to using a ceramic plate such as cordierite as the support, the apparent surface area of the catalyst is larger because it has continuous pores. etc.

, 2) When a foamed metal sheet is used as a catalyst support An example of a foamed metal sheet is one made of urethane foam, and the metal forming the network is hollow with pores for gas release. . Urethane 7 ohm spongy condition (high degree,
By selecting the porosity, the apparent specific surface area, number of pores per unit volume, pore diameter, porosity, and density can be arbitrarily controlled within a certain range. In the example of this invention, the commercially available pore size, ioo ~ 200μ, and the apparent specific surface area.
/eit A nickel foam metal with a porosity of 6 cm was used.

Activated alumina was supported in the same manner as in 1) above.

Alumina is gold that forms an uneven phase network of foam metal)
The carrier plate was in strong contact with the t-jS and satisfied the purpose. Apparent specific surface area The metal that forms the network is
The diameter of the pores was SO~100μ, which was large enough to allow the reactant to flow sufficiently. In this case, the apparent specific surface area is large enough to contribute to the size of the reaction vessel.

3) High porosity (t
In order to obtain o~ri0Ll)), io
~56? 72. ．． ．． In this case, a nonwoven fabric is used, which is made by passing a length of metal fiber through a spreader to make a brocade, compressing it to the required thickness, and sintering it.

For example, a nonwoven fabric with a porosity of 10, a pore diameter of about 1 to ioμ, and a minimum thickness of about SOμ can be obtained commercially by using stainless steel fibers with a wire diameter of ≠ μ. To avoid this, it is desirable that the surface of the metal fiber M is not smooth and has a large specific surface, so in the experiment of this invention, a porous metal fiber mat made of a non-woven fabric made of reduced IJi oxidized fiber was used. .

Activated alumina could be coated in the same manner as in 1) and 2) above. In this case, the thermal conductivity is relatively high compared to 1) and 2), the thickness of the support framework (film thickness) is thin and can be freely selected, and 700 stages of 1 m//rrL thickness equivalent υ are arranged. Its deep structure allows it to hold the carrier particles better, and its flexibility allows it to better adapt to the shape of the catalyst on irregularly shaped vessel walls.

The application of the characteristic catalyst support has been described above, but regarding the support of the catalyst material, the entire catalyst set, for example, platinum (PT), is supported on the catalyst support layer made of activated alumina as exemplified in /) 1.2) and 3). The method generally uses chloroplatinic acid (H
, Ptc16-4HzO) is used, but when supporting, for example, Pd on a silica-alumina carrier layer, first add 0. Immerse in aqueous ammonia solution of IN to remove excess N H
After washing, removing and drying 4, the amount corresponding to the amount to be supported [P
t1(NHs)4]C1* is immersed in an aqueous solution with a concentration of o, o t IAQ and left for several days. c.
There is also a method of washing and removing l-, drying, and then reducing in a hydrogen stream at 300 C for ≠ to j hours.

Further, as a dry method, the above-mentioned ion plating method can be applied as a method for supporting a catalyst substance onto a carrier fixed to a catalyst support as exemplified in 1), 1.2), and 3).

As an example of platinum metal gold as a catalyst material, 200
−． If activity below 260 C is not required,
Base metals such as nickel, iron, and manganese can also be used.

Activated alumina is used as an example of a catalyst carrier that promotes catalytic activity and firmly adheres the catalyst substance to the catalyst support.As a method of adhesion, the support is immersed or kneaded in a slurry of activated alumina to form the support. Although the method of drying and baking after adhesion has been described, the influence of air remaining on the surface of the support during dipping cannot be avoided. Therefore, in his invention, he developed a method for synthesizing activated alumina on a support.

The support was immersed in an aqueous solution of aluminum sulfate, and after degassing, an aqueous solution of alumina was successively added to synthesize aluminum hydroxide on the long body through a hydrolysis reaction. HirosoC ~ 700'C firing to activated alumina? This is a method of forming p. By selecting the water decomposition and firing conditions, it was possible to obtain activated alumina with arbitrary properties within a certain range.

In addition to alumina, silica alumina, silica, etc. may be used as the catalyst carrier.

Further, if very high activity is not required, the catalyst carrier may be omitted.

Catalytically active r-alumina with 5% Pt supported on the reactor wall, platinum metal catalyst with silicone resin, alumina cement, etc., which can withstand heat at the reaction temperature at which the catalyst is used. Adhesive (binder) with properties that can maintain the bonding effect between catalyst particles and between particles and vessel walls, as well as maintain air permeability between catalyst particles.
The catalyst layer is formed by kneading the ingredients to make a coating-enabled agent, which is applied and attached to the reactor wall, and then subjected to a fixing treatment such as heat treatment or curing to form a catalyst layer.

The feature of this method is that the vessel wall immediately becomes a catalyst layer, so it has good thermal conductivity, and the catalyst layer is extremely easy to form.

An example of this method is given below.

A commercially available platinum (j%) alumina catalyst was added to the
The mixture was kneaded at a ratio of 70% (by weight), brought to a thixotropic state, roughened and cleaned, then applied to a thickness of approximately 200μ on the piston head and cylinder head of a gasoline engine, and compressed under pressure. 330-44 after being trained in the atmosphere for 3 to 7 days and fully formed! The surface of the OC was heat treated. In addition to being porous, the condensate became even more porous and breathable because some of the CaS groups decomposed during heat treatment.

When driving a car equipped with a 1100 cc engine equipped with this catalyst layer, good results were found.

After testing for too long, I checked the catalyst layer, but there was no change at all.

j) 30% 10 as aggregate for alumina cement
A good effect was achieved by using a binder mixed with borax of less than 0 mesh, mixed with 300 water, and then added with the same catalyst as in l) and further kneaded to form solid concrete. q4+.

The surface of the catalyst layer remained porous and the layer was sound. It was sturdy and durable enough.

The mounting of the catalyst on the reactor wall is shown in the example above.The "plate metal type catalyst" is used by preparing the ML'l as a so-called catalyst element and mounting it on the reactor wall. Ru.

The same also applies to "a catalyst having a porous catalyst support."

[Brief explanation of drawings]

Fig. 7 is a longitudinal sectional view of an embodiment in which a gasoline engine is used as the internal combustion engine, Fig. 2 is a longitudinal sectional view in the case where a diesel engine is used as the internal combustion engine, and Fig. 3 is a longitudinal sectional view of an embodiment in which a gasoline engine is used as the internal combustion engine. FIG. 3 is an enlarged cross-sectional view of FIG. 3, and FIG. 3 is an explanatory perspective view of a rotary heat exchanger according to the present invention. The same reference numerals in the figures indicate the same or equivalent parts, (1)
is the internal combustion engine, (2) is the reactor wall, +31 ii catalyst layer,
(4) is a vertical sealing plate, (7) is a discharge pipe, (8) is a discharge chamber, (9] is an introduction pipe, α1 is an introduction chamber, (111 is a heat storage type reactor, aυ is dexterous, and a In the rotating body, Q3 indicates the heat storage wall, I indicates the partition, and α9 indicates the heat dissipation section. Patent applicant (inventor) Shigeru Hagino
Male Figure 1 Figure 2 Figure 3 Figure I Figure 3 ■ Figure q

Claims (1)

[Claims] (1) A heat exchanger characterized in that a catalyst layer for removing accumulated heat is provided on the inner surface of the reciprocating internal combustion reactor wall in which heat is passed through the reactor wall. A wall-type catalyst body in a reactor capable of (21. In the reactor capable of heat exchange according to claim 1, wherein the melting medium layer is formed directly or fixedly formed on a part or all of the reactor wall. Vessel wall type catalyst body. (3) A vertical shell of L7 forming 1゛ so that the reactant is introduced through the introduction groove of the lower (IID wall) and the product is taken out through the discharge hole of the upper side wall. A Fell-and-Tube type reaction vessel is constructed by establishing a plurality of heat medium pipes inside the heat medium pipes for introducing the heat medium from the bottom and discharging the heat medium to the top, and the outer periphery of the heat medium pipes is A vessel wall type or medium in a reactor capable of heat exchange with a catalyst that removes heat stored in the wall. (4) The vertical shell has upper and lower openings sealed with plates. The upper and lower sides of the upper and lower sealing plates are sealed with a discharge chamber with a discharge pipe in communication with the upper part and a heat medium introduction chamber with a heat medium introduction pipe in communication with the lower part. A vessel wall type catalyst body in a reactor capable of heat exchange according to claim 3. (5) Is the catalyst layer formed directly on the outer circumferential wall of the heat transfer pipe or is it fixed? A vessel wall-type catalyst body in a reactor capable of heat exchange according to claim 3, which is formed by: (6) A system in which combustible dilute gas is charged from the - side and discharged from the other side. A heat exchanger shell is rotatably mounted in the combustor box of the combustor, and the low-temperature air introduced into the heat exchanger shell from one side is discharged from the other side. A catalyst is installed on the outer surface of the curtain heat wall of the heat exchange cylinder of the reactor, which is capable of heat exchange by exchanging low temperature air flowing inside with high temperature air due to heat storage, and removes heat stored by combustion of the flammable dilute gas. A wall-type catalyst body for a reactor capable of heat exchange, characterized by having layers.