KR20220093960A - Combustion system using ammonia decomposition reaction - Google Patents

Abstract

A combustion system using ammonia decomposition reaction according to the present invention has an effect of high thermal decomposition efficiency by preventing the formation of a local cold zone during the ammonia decomposition reaction, has high thermal efficiency by converting ammonia fuel into an ammonia-hydrogen mixed fuel containing 10 vol% or more of hydrogen without supplying an additional heat source and catalyst from the outside, and may have compactly configured devices to be miniaturized.

Description

Combustion system using ammonia decomposition reaction

The present invention relates to a combustion system using ammonia decomposition reaction.

Ammonia is composed of nitrogen (N) and hydrogen (H), and is a fuel that is highly likely to emerge as a next-generation energy as the price of fossil fuels rises and carbon dioxide regulations are strengthened. In particular, ammonia has the advantage that it can be used as an alternative fuel for existing transportation systems based on internal combustion engines. In other words, what attracts attention as an alternative fuel for transport means is that ammonia can be recycled from an existing internal combustion engine. In addition, the ammonia-fueled transportation means does not have a severe explosion hazard or toxicity problem compared to other fuels.

In order to efficiently use ammonia as a fuel for an internal combustion engine, it is necessary to first pyrolyze ammonia to generate hydrogen, and then burn the fuel including hydrogen and unreacted ammonia through an internal combustion engine. However, a lot of thermal energy is required to pyrolyze ammonia, and the pyrolysis temperature can be reduced by using a catalyst, but the catalyst is not efficient because it forms a high price. In addition, since ammonia is an endothermic reaction, it is difficult to maintain a uniform ambient temperature during thermal decomposition, so a local cold zone is created, which causes a sharp decrease in the decomposition rate of ammonia.

Therefore, there is a need for an ammonia combustion system capable of minimizing the thermal energy required for thermal decomposition of ammonia in using ammonia as a fuel for an internal combustion engine.

Korean Patent Publication No. 10-2011-0089454

An object of the present invention is to provide a combustion system through the ammonia decomposition reaction with high thermal decomposition efficiency by preventing the formation of a local cold zone during the ammonia decomposition reaction.

Another object of the present invention is to provide a combustion system through ammonia decomposition reaction having high thermal efficiency that converts ammonia fuel into ammonia-hydrogen mixed fuel containing 10% by volume or more of hydrogen without supply of an additional heat source and catalyst from the outside. will be.

Another object of the present invention is to provide a combustion system through an ammonia decomposition reaction that can be used with a carbon-based fuel and can be used as a mixed fuel of ammonia-hydrogen-hydrocarbon.

Another object of the present invention is to provide a combustion system through an ammonia decomposition reaction that can be compactly configured and can be miniaturized.

Combustion system through ammonia decomposition reaction according to the present invention, ammonia fuel tank in which the first fuel containing ammonia is stored; a pyrolysis chamber for converting the first fuel into a second fuel including hydrogen and unreacted ammonia produced by a pyrolysis reaction; and an internal combustion engine that burns the second fuel to generate exhaust gas and energy, wherein the pyrolysis chamber is a double pipe in which a first hollow and a second hollow are partitioned around a partition wall, the first The first fuel is introduced into the hollow to be thermally decomposed, and the exhaust gas is introduced into the second hollow to exchange heat between the first fuel and the exhaust gas through the partition wall, and the first hollow is connected to the partition wall However, by providing a plurality of bluff bodies that intersect and spaced apart from each other, the thermal energy of the exhaust gas in the second hollow is uniformly transmitted to the first fuel in the first hollow.

In one embodiment of the present invention, the combustion system through the ammonia decomposition reaction in which the thermal energy of the second fuel is transferred to the first fuel.

The combustion system through the ammonia decomposition reaction according to an embodiment of the present invention may further include a heat exchange unit for exchanging heat between the first fuel and the second fuel, and the heat exchange unit includes a third hollow and a fourth hollow partition wall. A double pipe divided around The hollow is connected to the first hollow so that the first fuel can flow out into the first hollow, and a fourth hollow at the other end of the heat exchange unit that is the double pipe is connected to the first hollow and the second fuel from the first hollow can be introduced.

In an example of the present invention, the heat exchange unit is a combustion system through ammonia decomposition reaction of a double pipe in which the third hollow is formed as the central portion and the fourth hollow is formed as the outer surface portion.

Combustion system through ammonia decomposition according to an embodiment of the present invention, a cooling water storage tank; and a cooling unit for exchanging heat between the second fuel and the cooling water flowing out from the first hollow, and the second fuel heat-exchanged by the cooling unit may flow out into the fourth hollow.

In an example of the present invention, the first hollow may further include a monolithic foam support on which a catalyst for ammonia decomposition is supported.

In an example of the present invention, the surface of the blur body may be coated with a catalyst for decomposition of ammonia.

In an example of the present invention, the pyrolysis chamber may be a double tube in which a first hollow is formed as a central portion and a second hollow is formed as an outer surface portion.

In an example of the present invention, in the heat exchange chamber, the hydrogen production yield may be 10% or more.

The combustion system through the ammonia decomposition reaction according to an embodiment of the present invention may further include a carbon-based fuel tank in which hydrocarbon-based fuel is stored, and the internal combustion engine is a mixed fuel including the second fuel and the hydrocarbon-based fuel. Combustion may be to produce exhaust gases and energy.

The combustion system through the ammonia decomposition reaction according to the present invention has an effect of high thermal decomposition efficiency by preventing the formation of a local cold zone during the ammonia decomposition reaction.

The combustion system through the ammonia decomposition reaction according to the present invention has an effect of having high thermal efficiency of converting ammonia fuel into ammonia-hydrogen mixed fuel containing 10% by volume or more of hydrogen without supply of an additional heat source and catalyst from the outside.

The combustion system through the ammonia decomposition reaction according to the present invention can be used with a carbon-based fuel, so that it can be used as a mixed fuel of ammonia-hydrogen-hydrocarbon.

The combustion system through the ammonia decomposition reaction according to the present invention can be configured to be compact and has the effect of miniaturization.

1 is a view showing a schematic process flow of a combustion system including a means for exchanging heat with a first raw material and exhaust gas.
2 is a cross-sectional view taken in the longitudinal direction of the double pipe so that the inside of the first hollow of the heat exchange chamber, which is the double pipe, can be seen.
FIG. 3 is a view showing a schematic process flow of a combustion system including a means for preheating a first fuel by a second fuel after a thermal reaction and a means for exchanging heat between the preheated first raw material and exhaust gas.
FIG. 4 is a view schematically illustrating a process flow of a combustion system including a means for preheating a first fuel by a second fuel after a thermal reaction, a means for exchanging heat between the preheated first raw material and exhaust gas, and a cooling unit.

Hereinafter, a combustion system using an ammonia decomposition reaction according to the present invention will be described in detail with reference to the accompanying drawings.

The drawings described in this specification are provided as examples in order to sufficiently convey the spirit of the present invention to those skilled in the art. Therefore, the present invention is not limited to the drawings presented and may be embodied in other forms, and the drawings may be exaggerated to clarify the spirit of the present invention.

Unless otherwise defined in technical terms and scientific terms used in this specification, those of ordinary skill in the art to which this invention belongs have the meanings commonly understood, and in the following description and accompanying drawings, the subject matter of the present invention Descriptions of known functions and configurations that may unnecessarily obscure will be omitted.

A singular form of a term used herein may be construed to include a plural form as well unless otherwise indicated.

Unless otherwise specified, the unit of % used in the present specification means % by weight unless otherwise specified.

Combustion system through the ammonia decomposition reaction according to the present invention, ammonia (NH ₃ ) The first fuel containing the stored ammonia fuel tank 100; a pyrolysis chamber 200 for converting the first fuel into a second fuel including hydrogen (H ₂ ) and unreacted ammonia generated by thermally decomposing the first fuel; and an internal combustion engine 300 for generating exhaust gas and energy by burning the second fuel. At this time, the pyrolysis chamber 200 is a double pipe divided into a first hollow 210 and a second hollow 220 centered on the partition wall, and the first fuel is introduced into the first hollow 210 , It is thermally decomposed, and the exhaust gas flows into the second hollow 220 so that the first fuel and the exhaust gas exchange heat with each other through the partition wall. In particular, the first hollow 210 includes a plurality of bluff bodies 211 that are connected to the partition wall and intersect with each other spaced apart, so that the thermal energy of the exhaust gas in the second hollow 220 is transferred to the second hollow 220 . It is uniformly transferred to the first fuel in the first hollow 210 .

That is, the combustion system through the ammonia decomposition reaction according to the present invention uses the thermal energy of the exhaust gas discharged from the internal combustion engine 300 for the ammonia pyrolysis reaction of the pyrolysis chamber 200, and at this time, the thermal energy of the exhaust gas is used in the pyrolysis chamber ( Technically, the bluff body 211 capable of delivering to the center of the pyrolysis chamber 200 is provided inside the pyrolysis chamber 200 so that the pyrolysis reaction of ammonia by the thermal energy of the exhaust gas can occur in all areas of the pyrolysis chamber 200. characterized.

Referring to FIG. 1, the combustion system through the ammonia decomposition reaction according to the present invention will be described in detail as follows. The first fuel containing ammonia stored in the ammonia fuel tank 100 is introduced into the pyrolysis chamber 200, which is a double pipe in which the first hollow 210 and the second hollow 220 are partitioned around the bulkhead, the first is introduced into the hollow 210 . Ammonia is decomposed into hydrogen and nitrogen when thermal energy is satisfied, and the first hollow 210 is a pyrolysis unit that is converted into a second fuel including hydrogen and unreacted ammonia generated by pyrolysis of a first fuel containing ammonia to be. The second fuel converted from the first fuel in the first hollow 210 of the pyrolysis chamber 200 includes hydrogen to provide power with high energy efficiency through combustion of the second fuel in the internal combustion engine 300 . can At this time, the second fuel is combusted to generate exhaust gas, and the exhaust gas is high in temperature and has high thermal energy. The pyrolysis reaction of ammonia in the pyrolysis chamber 200 is an endothermic reaction and requires high thermal energy. Therefore, in order to produce power with high energy efficiency, sufficient thermal energy must be supplied for pyrolysis of ammonia. To this end, in the present invention, the thermal energy of the exhaust gas generated from the internal combustion engine 300 is used for thermal decomposition of ammonia, and in particular, a plurality of bluff bodies 211 so that the thermal energy of the exhaust gas is transferred to all ammonia in the region for thermal decomposition. ) (Bluff body) is used.

In detail, in the pyrolysis chamber 200 which is a double pipe in which the first hollow 210 and the second hollow 220 are partitioned around a partition wall, the exhaust gas flows into the second hollow 220, and the second Exhaust gas flowing through the hollow 220 increases the temperature of ammonia by exchanging heat with the first fuel including ammonia in the first hollow 210 in which ammonia is thermally decomposed through the partition wall. Since heat exchange is performed through the partition wall as described above, heat transfer may not be smooth in the central portion of the first hollow 210 that is relatively further away from the partition wall. is provided inside the first hollow 210 so that ammonia can undergo a thermal decomposition reaction in all areas within the first hollow 210 .

In the first hollow 210, the bluff body 211 is not limited as long as it is a heat conductor material so as to facilitate heat transfer, for example, various metals such as stainless steel and metal oxides such as aluminum oxide may be used. have. As shown in FIG. 2 , a plurality of bluff bodies 211 are formed to cross each other so that the first fuel including ammonia forms a vortex to flow in the first hollow 210 . As a specific example, the bluff body 211 is a pyrolysis chamber in which the first bluff body 211a in the shape of a disk (ring) protruding from the circumference of the inner circumferential surface of the partition wall of the pyrolysis chamber 200, which is a double tube, is a double tube. A plurality of 200 may be formed to be spaced apart from each other by a predetermined distance in the longitudinal direction. In addition, the bluff body 211 is a pyrolysis chamber 200 in which a disc-shaped second bluff body 211b formed from the center of the inner circumferential surface of the partition wall of the pyrolysis chamber 200, which is a double tube, to the circumference of the inner circumferential surface of the partition wall is a double tube. A plurality of bluffs may be formed to be spaced apart from each other by a predetermined distance in the longitudinal direction, and may be formed to intersect the second bluff body 211b. In this case, the first bluff body 211a and the second bluff body 211b may also be formed to be spaced apart from each other by a predetermined distance in the longitudinal direction of the thermal decomposition chamber 200 which is a double tube. The second bluff body 211b is connected to the partition wall and is positioned so as to receive thermal energy transferred to the partition wall, for example, the central axis of the first hollow 210 of the pyrolysis chamber 200, which is a double tube. The second bluff body 211b in the shape of a disk may be formed to be spaced apart from the central axis by a predetermined distance. The central axis may be connected to the barrier rib through one end or the other end of the tube to receive thermal energy from the barrier rib.

In the pyrolysis chamber 200, the positions of the first hollow 210 and the second hollow 220 may be formed such that the first hollow 210 is the central portion and the second hollow 220 is the outer surface portion, and the first hollow The second hollow 220 may be formed as the central portion as the 210 is the outer surface portion. Preferably, the first hollow 210 is formed as the center and the second hollow 220 is formed as the outer surface to minimize the thermal energy of the first hollow 210 in which the thermal decomposition reaction occurs to the outside of the system.

A more preferred combustion system through ammonia decomposition according to the present invention transfers high thermal energy of the second fuel including ammonia and hydrogen converted in the pyrolysis chamber 200 to the first fuel before pyrolysis in the pyrolysis chamber 200 . Thus, by preheating, there is an effect that the pyrolysis reaction of ammonia in the pyrolysis chamber 200 can occur better. As described above, the effect of minimizing the formation of a cold zone during thermal decomposition of ammonia through the bluff body 211 of thermal energy of exhaust gas discharged from the internal combustion engine 300 is realized, but the present invention provides When a means for preheating the first fuel through heat exchange of the first fuel is further included, as the low temperature first fuel is injected into the pyrolysis chamber 200 , a problem in which thermal decomposition efficiency may be momentarily reduced is prevented, thereby forming a cold zone can be further minimized.

As such, the combustion system through the ammonia decomposition reaction according to the present invention can sufficiently supply the thermal energy required for the pyrolysis reaction of ammonia without an additional external thermal energy source and an expensive catalyst for pyrolysis of ammonia, and thus a high-efficiency internal combustion engine 300 system can provide However, this only describes that the ammonia internal combustion engine 300 system can be operated without an external thermal energy source and an expensive catalyst for pyrolysis of ammonia, and the use of an external thermal energy source and catalyst for pyrolysis of ammonia is also the scope of the present invention Of course, it can be included in

As a specific means for preheating by transferring the high thermal energy of the second fuel to the first fuel before pyrolysis in the pyrolysis chamber 200, the combustion system through the ammonia decomposition reaction according to an embodiment of the present invention is preferred. and a heat exchange unit 400 for exchanging heat with the second fuel, wherein the heat exchange unit 400 is divided into a third hollow 310 and a fourth hollow 320 with an inside of the partition wall as the center. It is a double pipe, and the first fuel and the second fuel flow in the third hollow 310 and the fourth hollow 320, respectively, so that heat exchange can be performed through the partition wall, and the heat exchange unit 400 which is the double pipe At one end, the third hollow 310 is connected to the first hollow 210 so that the first fuel can flow out into the first hollow 210 , and at the other end of the heat exchange unit 400 , which is the double pipe, The fourth hollow 320 may be connected to the first hollow 210 so that the second fuel may be introduced from the first hollow 210 .

Referring to FIG. 3, the means for preheating the first fuel will be described in detail as follows. The second fuel containing unreacted ammonia and hydrogen discharged through thermal reaction in the first hollow 210 of the pyrolysis chamber 200 is a third hollow 310 and a fourth hollow 320 partitioned around a partition wall. It is introduced into the heat exchange unit 400 which is a double pipe, and is introduced into the fourth hollow 320 . In addition, the second fuel is discharged through the fourth hollow 320 from one end of the heat exchange unit 400 , which is the double pipe, and introduced into the internal combustion engine 300 . At this time, a fourth hollow 320 at the other end of the heat exchange unit 400 that is the double pipe is connected to the first hollow 210 , and the second fuel is introduced from the first hollow 210 . At one end of the third hollow 310 , the first fuel containing ammonia flows in from the ammonia fuel tank 100 , and flows through the third hollow 310 through the other end of the third hollow 310 . As fuel is discharged, it flows into the first hollow 210 of the pyrolysis chamber 200 . That is, the second fuel having a relatively high temperature and the first fuel having a relatively low temperature exchange heat with each other through the partition wall of the heat exchange unit 400, which is a double pipe, and through this, the first fuel is preheated before the pyrolysis reaction and then the pyrolysis chamber ( 200) can easily reach the temperature required for pyrolysis.

As described above, in the preferred combustion system through the ammonia decomposition reaction according to the present invention, in view of the flow path of the fuel, the preheating of the first fuel by the second fuel after the thermal reaction is first performed, and then the preheated first raw material and the exhaust It is good for the gas to heat exchange. When the preheating of the first fuel is first performed by the exhaust gas and then heat exchange between the preheated first raw material and the second raw material after the thermal reaction, sufficient thermal energy required for the thermal reaction of ammonia of the first raw material in the thermal reaction chamber is secured may be difficult, and a sufficient cooling effect of the second raw material flowing into the internal combustion engine 300 may not be expected.

In the heat exchange unit 400, the positions of the third hollow 310 and the fourth hollow 320 may include the third hollow 310 as the center and the fourth hollow 320 as the outer surface, and the third hollow The fourth hollow 320 may be formed as the central portion of the 310 as the outer surface portion. Preferably, the third hollow 310 is the center and the fourth hollow 320 is formed as the outer surface so as to minimize the heat energy of the third hollow 310 from escaping to the outside of the system.

As described above, the preferred combustion system through the ammonia decomposition reaction according to the present invention has the effect of preheating the first fuel before pyrolysis by using the thermal energy of the second fuel including hydrogen generated by pyrolysis, but the pyrolysis chamber 200 ), the high-temperature second fuel by the thermal decomposition reaction is converted into the low-temperature second fuel through the heat exchange unit 400 to minimize durability degradation due to a sudden temperature difference in the combustion chamber of the internal combustion engine 300 .

As an example that can further reduce the temperature of the second fuel, as shown in FIG. 4 , the combustion system through the ammonia decomposition reaction according to the present invention includes a cooling water storage tank; and a cooling unit 500 for exchanging heat with the second fuel and the coolant flowing out from the first hollow 210 of the pyrolysis chamber 200 . In this case, the second fuel heat-exchanged by the cooling unit 500 may flow out into the fourth hollow 320 of the heat exchanging unit 400 . Through this, by further reducing the temperature of the second fuel and supplying the second fuel to the internal combustion engine 300 , deterioration in durability due to a sudden temperature difference in the combustion chamber of the internal combustion engine 300 can be minimized.

As such, the combustion system through the ammonia decomposition reaction according to the present invention can provide a high-efficiency internal combustion engine 300 system without an additional external thermal energy source and an expensive catalyst for pyrolysis of ammonia. A catalyst for pyrolysis of ammonia may be further used to lower the temperature. In particular, the present invention can significantly lower the content of the catalyst compared to the prior art even if the catalyst for pyrolysis of ammonia is used through the combination of the above-described configurations.

As a specific example, the first hollow 210 of the pyrolysis chamber 200 may further include a monolithic foam support on which a catalyst for ammonia decomposition is supported. When a catalyst-supported monolithic foam support is used, the differential pressure is small compared to ceramic catalysts and the durability is strong even in the case of a large vibration such as a marine engine.

As a specific example, the surface of the bluff body 211 in the first hollow 210 may be coated with a catalyst for decomposition of ammonia. Since the first raw material forms a vortex when flowing by the bluff body 211, the contact probability and contact amount with the surface of the bluff body 211 per unit time significantly increases, so that the catalyst is coated on the surface of the bluff body 211 If there is, it is possible to lower the pyrolysis temperature of ammonia with high efficiency even if a small amount of catalyst is used.

The catalyst may be any as long as it can reduce the thermal decomposition temperature of ammonia, for example, a catalyst in which RuO ₂ nanoparticles are immersed on a γ-Al ₂ O ₃ catalyst layer. However, this is only described as a specific example, and the present invention is not limited thereto.

The pyrolysis temperature in the pyrolysis chamber 200 may vary depending on the combination of the above-described components or whether or not a catalyst is used, for example, it may be carried out at 500°C or higher, specifically 500 to 1,000°C. However, this is only described as a preferred example, and the present invention is not construed as being limited thereto.

In the combustion system through the ammonia decomposition reaction according to the present invention, the production yield of hydrogen according to the pyrolysis reaction of ammonia through the combination of the above-described means may be 10% or more.

The combustion system through the ammonia decomposition reaction according to an example of the present invention may further include a carbon-based fuel tank in which hydrocarbon-based fuel is stored, and the internal combustion engine 300 includes the second fuel and the hydrocarbon-based fuel. It may be to burn the mixed fuel to produce exhaust gases and energy. That is, the combustion system through the ammonia decomposition reaction according to the present invention may use ammonia or hydrogen as a raw material, but with this, hydrocarbon fuels, for example, petroleum fuels such as gasoline and diesel may also be used, in which case the second Mixed use with raw materials is also possible.

The present invention relates to a combustion system, apparatus or method through ammonia decomposition reaction, and for those already well-known, such as the specific structure of the internal combustion engine 300, the description thereof is omitted so as not to obscure the essence of the invention, and, if necessary, the known literature It is free to refer to

100: ammonia fuel tank, 200: pyrolysis chamber,
210: a first hollow of the pyrolysis chamber, 211: a bluff body,
211a: ring-type bluff body, 211b: disk-type bluff body
220: a second hollow of the pyrolysis chamber, 300: an internal combustion engine,
400: a heat exchange unit, 410: a third hollow of the heat exchange unit,
420: fourth hollow of the heat exchange unit, 500: cooling unit

Claims (10)

Ammonia fuel tank 100 in which the first fuel containing ammonia is stored;
a pyrolysis chamber 200 for converting the first fuel into a second fuel including hydrogen and unreacted ammonia produced by a pyrolysis reaction; and
and an internal combustion engine 300 that burns the second fuel to generate exhaust gas and energy.
The pyrolysis chamber 200 is a double tube having an interior partitioned with a partition wall into a first hollow 210 and a second hollow 220 , and the first fuel is introduced into the first hollow 210 for pyrolysis and the exhaust gas flows into the second hollow 220 so that the first fuel and the exhaust gas exchange heat with each other through the partition wall,
The first hollow 210 includes a plurality of bluff bodies 211 that are connected to the partition wall and intersect with each other spaced apart from each other, so that the heat energy of the exhaust gas in the second hollow 220 is transferred to the first hollow 210 . ) combustion system through ammonia decomposition reaction to deliver uniformly to the primary fuel. According to claim 1,
A combustion system through an ammonia decomposition reaction in which thermal energy of the second fuel is transferred to the first fuel. 3. The method of claim 2,
The combustion system through the ammonia decomposition reaction further includes a heat exchange unit 400 for exchanging heat between the first fuel and the second fuel,
The heat exchange unit 400 is a double pipe divided into a third hollow 410 and a fourth hollow 420 with a partition wall as the center, and the third hollow 410 and the fourth hollow 420 The first fuel and the second fuel flow, respectively, to exchange heat through the partition wall,
At one end of the heat exchange unit 400, which is the double pipe, a third hollow 410 is connected to the first hollow 210 and the first fuel flows out into the first hollow 210,
A fourth hollow 420 at the other end of the heat exchange unit 400, which is the double pipe, is connected to the first hollow 210 and the second fuel is introduced from the first hollow 210 Combustion system through ammonia decomposition reaction . 4. The method of claim 3,
The heat exchange unit 400 is a combustion system through ammonia decomposition reaction of a double tube in which the third hollow 410 is the central part and the fourth hollow 420 is the outer surface part. 4. The method of claim 3,
The combustion system through the ammonia decomposition reaction,
coolant storage tank; and
It further includes a;
A combustion system through an ammonia decomposition reaction in which the second fuel heat-exchanged by the cooling unit (500) flows out into the fourth hollow (420). According to claim 1,
The first hollow 210 is a combustion system through ammonia decomposition reaction further comprising a monolithic foam support on which a catalyst for ammonia decomposition is supported. According to claim 1,
A combustion system through an ammonia decomposition reaction in which the surface of the bluff body 211 is coated with a catalyst for decomposition of ammonia. According to claim 1,
The pyrolysis chamber 200 is a combustion system through ammonia decomposition reaction, which is a double tube in which the first hollow 210 is the center and the second hollow 220 is the outer surface. According to claim 1,
In the heat exchange chamber 200, a combustion system through ammonia decomposition reaction in which the yield of hydrogen is 10% or more. According to claim 1,
The combustion system through the ammonia decomposition reaction further includes a carbon-based fuel tank in which hydrocarbon-based fuel is stored,
The internal combustion engine 300 is a combustion system through ammonia decomposition reaction to generate exhaust gas and energy by burning the mixed fuel including the second fuel and the hydrocarbon-based fuel.

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