KR20240060319A - Methane oxidation catalyst regeneration system and method - Google Patents

Abstract

The present invention relates to a methane oxidation catalyst regeneration system, which includes an exhaust line that discharges exhaust gas, a methane oxidation catalyst that is provided in the exhaust line and removes methane from the exhaust gas, and a methane oxidation catalyst that is installed in the exhaust line upstream of the deoxidation catalyst. By including a regeneration gas supply line that is connected and selectively supplies regeneration gas to regenerate the methane oxidation catalyst, and a heating catalyst provided in the regeneration gas supply line and heating the regeneration gas by an exothermic reaction, the methane oxidation catalyst The advantageous effect of improving regeneration efficiency and regeneration performance can be obtained.

Description

Methane oxidation catalyst regeneration system and method {METHANE OXIDATION CATALYST REGENERATION SYSTEM AND METHOD}

The present invention relates to a methane oxidation catalyst regeneration system and method, and more specifically, to a methane oxidation catalyst regeneration system and method that can improve the regeneration efficiency and regeneration performance of the methane oxidation catalyst.

Compared to existing fuels, natural gas fuel is attracting attention as an eco-friendly fuel because it emits very little air pollutants such as sulfur oxides, nitrogen oxides, and particulate matter, and the use of natural gas-fueled engines in automobiles and ships is increasing. am.

Methane, the main component of natural gas, has a strong carbon-hydrogen bond and remains fairly stable, so it is difficult to naturally oxidize under exhaust gas temperature conditions if it is not completely consumed in the engine.

Meanwhile, methane is a greenhouse gas with a global warming potential that is about 25 times higher than that of carbon dioxide, so in order to solve the problem of global warming, the amount of methane emitted from exhaust gas must be minimized.

Previously, a method to capture (remove) methane contained in exhaust gas using a methane oxidation catalyst (MOC) has been proposed.

However, if the methane oxidation catalyst is used for more than a certain period of time, the durability of the methane oxidation catalyst decreases and the methane oxidation catalyst is deactivated in a state where it is difficult to remove methane. Therefore, if the methane oxidation catalyst is used for more than a certain period of time, methane oxidation occurs. The step of regenerating the catalyst must be able to be performed periodically.

However, conventionally, as the methane oxidation catalyst must be regenerated by supplying regeneration gas heated through a heater to the methane oxidation catalyst, there is a problem in that it is difficult to improve the regeneration efficiency and regeneration performance of the methane oxidation catalyst beyond a certain level.

In addition, in order to ensure the regeneration efficiency of the methane oxidation catalyst, it is necessary to minimize the specific gravity of oxygen contained in the regenerated gas supplied to the methane oxidation catalyst. As a separate oxygen filter must be provided to reduce the oxygen concentration, the structure becomes complicated, and space utilization and design freedom are reduced.

Accordingly, various studies have been conducted recently to simplify the structure and improve space utilization and design freedom while ensuring the regeneration efficiency of the methane oxidation catalyst, but it is still insufficient and development is required.

The purpose of an embodiment of the present invention is to provide a methane oxidation catalyst regeneration system that can improve the regeneration efficiency and regeneration performance of the methane oxidation catalyst.

In particular, the purpose of the embodiment of the present invention is to heat the regeneration gas supplied to the methane oxidation catalyst using an exothermic reaction caused by a heating catalyst without using a separate heater.

Above all, the purpose of the embodiment of the present invention is to heat the regeneration gas supplied to the methane oxidation catalyst and simultaneously lower the specific gravity of oxygen contained in the regeneration gas.

Additionally, embodiments of the present invention aim to extend the life of the methane oxidation catalyst and improve energy efficiency.

In addition, the embodiment of the present invention aims to simplify the process and structure for regenerating the methane oxidation catalyst and improve space utilization and design freedom.

The problem to be solved in the embodiment is not limited to this, and also includes purposes and effects that can be understood from the means of solving the problem or the embodiment described below.

According to a preferred embodiment of the present invention for achieving the above-described objectives of the present invention, the methane oxidation catalyst regeneration system includes an exhaust line that discharges exhaust gas, a methane oxidation catalyst provided in the exhaust line and that removes methane from the exhaust gas, A regeneration gas supply line is connected to the discharge line upstream of the deoxidation catalyst and selectively supplies regeneration gas to regenerate the methane oxidation catalyst, and is provided in the regeneration gas supply line to regenerate the regeneration gas through an exothermic reaction. It includes a heating catalyst that heats.

This is to improve the regeneration efficiency and regeneration performance of the methane oxidation catalyst.

That is, conventionally, as the methane oxidation catalyst must be regenerated by supplying regeneration gas heated through a heater to the methane oxidation catalyst, there is a problem in that it is difficult to improve the regeneration efficiency and regeneration performance of the methane oxidation catalyst beyond a certain level. In addition, in order to ensure the regeneration efficiency of the methane oxidation catalyst, it is necessary to minimize the specific gravity of oxygen contained in the regenerated gas supplied to the methane oxidation catalyst. As a separate oxygen filter must be provided to reduce the oxygen concentration, the structure becomes complicated, and space utilization and design freedom are reduced.

However, the embodiment of the present invention can obtain the advantageous effect of improving the regeneration efficiency and regeneration performance of the methane oxidation catalyst by heating the regeneration gas for regenerating the methane oxidation catalyst through a heating catalyst.

In particular, the embodiment of the present invention heats the regeneration gas supplied to the methane oxidation catalyst by using the exothermic reaction caused by the heating catalyst without using a separate heater, thereby heating the regeneration gas supplied to the methane oxidation catalyst. At the same time, since the specific gravity of oxygen in the regeneration gas can be lowered, the regeneration efficiency and regeneration performance of the methane oxidation catalyst can be improved, and the advantageous effect of simplifying the process and structure for regenerating the methane oxidation catalyst can be obtained.

According to a preferred embodiment of the present invention, the methane oxidation catalyst regeneration system has one end connected to the discharge line upstream of the methane oxidation catalyst, and the other end connected to the discharge line downstream of the methane oxidation catalyst. It is connected to the line and may include a bypass line that selectively bypasses the exhaust gas from upstream of the methane oxidation catalyst to downstream of the methane oxidation catalyst.

According to a preferred embodiment of the present invention, the methane oxidation catalyst regeneration system is provided in the discharge line upstream of the methane oxidation catalyst and includes a switching member that selectively switches the movement path of the exhaust gas to the bypass line. It can be included.

According to a preferred embodiment of the present invention, the switching member may be configured to switch the movement path of the exhaust gas to the bypass line while supplying the regeneration gas to the methane oxidation catalyst.

As a regeneration gas, various gases that can regenerate the methane oxidation catalyst can be used.

According to a preferred embodiment of the present invention, the regeneration gas may include reducing gas, oxygen, and nitrogen.

According to a preferred embodiment of the present invention, the reducing gas may include at least one of hydrogen, ammonia, and hydrocarbons.

According to a preferred embodiment of the present invention, the hydrocarbon may include methane.

According to another preferred embodiment of the present invention, it is possible for the regeneration gas to include methane (or reducing gas), air, and nitrogen.

According to an embodiment of the present invention, the heating catalyst can remove at least a portion of oxygen from the regeneration gas through an exothermic reaction.

This is due to the fact that the lower the oxygen specific gravity of the regeneration gas supplied to the methane oxidation catalyst, the better the regeneration efficiency and regeneration performance of the methane oxidation catalyst. In the embodiment of the present invention, the regeneration gas is heated by an exothermic reaction and at the same time By removing the oxygen contained in the regeneration gas, the advantageous effect of further improving the regeneration efficiency and regeneration performance of the methane oxidation catalyst can be obtained.

In particular, the embodiment of the present invention uses a separate oxygen filter to remove oxygen from the regeneration gas supplied to the methane oxidation catalyst by ensuring that the oxygen contained in the regeneration gas is removed together when the regeneration gas is heated (during an exothermic reaction). Since there is no need to prepare, the advantageous effect of simplifying the process and structure for regenerating the methane oxidation catalyst and improving space utilization and design freedom can be obtained.

According to another preferred field of the present invention, a method of regenerating a methane oxidation catalyst for removing methane from exhaust gas includes the steps of heating the regeneration gas through an exothermic reaction using a heating catalyst, and converting the regeneration gas heated by the heating catalyst into methane. It includes the step of regenerating the methane oxidation catalyst by supplying it to the oxidation catalyst.

According to another preferred field of the present invention, while heating the regeneration gas, at least some of the oxygen contained in the regeneration gas can be removed by an exothermic reaction.

According to another preferred field of the present invention, during regeneration of the methane oxidation catalyst, exhaust gas can be discharged to the outside by bypassing the methane oxidation catalyst.

As described above, according to the embodiment of the present invention, the advantageous effect of improving the regeneration efficiency and regeneration performance of the methane oxidation catalyst can be obtained.

In particular, according to an embodiment of the present invention, the regeneration gas supplied to the methane oxidation catalyst can be heated using an exothermic reaction caused by a heating catalyst without using a separate heater.

Above all, according to an embodiment of the present invention, it is possible to heat the regeneration gas supplied to the methane oxidation catalyst and simultaneously lower the specific gravity of oxygen contained in the regeneration gas.

In addition, according to an embodiment of the present invention, the advantageous effect of extending the life of the methane oxidation catalyst and improving energy efficiency can be obtained.

In addition, according to the embodiment of the present invention, the advantageous effect of simplifying the process and structure for regenerating the methane oxidation catalyst and improving space utilization and design freedom can be obtained.

1 is a diagram for explaining a methane oxidation catalyst regeneration system according to an embodiment of the present invention.
Figure 2 is a methane oxidation catalyst regeneration system according to an embodiment of the present invention, and is a diagram for explaining the regeneration process of the methane oxidation catalyst.
Figure 3 is a diagram for explaining the exhaust gas treatment process as a methane oxidation catalyst regeneration system according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

However, the technical idea of the present invention is not limited to some of the described embodiments, but may be implemented in various different forms, and as long as it is within the scope of the technical idea of the present invention, one or more of the components may be optionally used between the embodiments. It can be used by combining and replacing.

In addition, terms (including technical and scientific terms) used in the embodiments of the present invention, unless explicitly specifically defined and described, are generally understood by those skilled in the art to which the present invention pertains. It can be interpreted as meaning, and the meaning of commonly used terms, such as terms defined in a dictionary, can be interpreted by considering the contextual meaning of the related technology.

Additionally, the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention.

In this specification, the singular may also include the plural unless specifically stated in the phrase, and when described as "at least one (or more than one) of A and B and C", it is combined with A, B, and C. It can contain one or more of all possible combinations.

Additionally, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used.

These terms are only used to distinguish the component from other components, and are not limited to the essence, sequence, or order of the component.

And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also is connected to the other component. It may also include cases where the other components are 'connected', 'combined', or 'connected' due to another component between them.

Additionally, when described as being formed or disposed "above" or "below" each component, "above" or "below" refers not only to cases where two components are in direct contact with each other, but also to one This also includes cases where another component described above is formed or disposed between two components. In addition, when expressed as "top (above) or bottom (bottom)", it may include not only the upward direction but also the downward direction based on one component.

Referring to Figures 1 to 3, the methane oxidation catalyst regeneration system 10 according to an embodiment of the present invention is provided in the discharge line 110, which discharges exhaust gas (DG), and discharges exhaust gas (DG). The methane oxidation catalyst (120), which removes methane from (DG), is connected to the discharge line (110) upstream of the deoxidation catalyst, and regeneration gas (CG) is used to regenerate the methane oxidation catalyst (120). It includes a regeneration gas supply line 210 that is selectively supplied, and a heating catalyst 220 provided in the regeneration gas supply line 210 that heats the regeneration gas (CG) by an exothermic reaction.

For reference, the methane oxidation catalyst regeneration system 10 according to an embodiment of the present invention can be applied to mobility (subjects) such as vehicles, ships, and aircraft fueled by natural gas, and the methane oxidation catalyst regeneration system 10 ) is not limited or limited by the type and characteristics of the subject to which it is applied.

Hereinafter, the methane oxidation catalyst regeneration system 10 according to an embodiment of the present invention will be described as an example applied to a ship.

The discharge line 110 is provided to discharge exhaust gas (DG) exhausted from the ship's engine 20 to the outside.

The discharge line 110 may be provided in various structures capable of discharging exhaust gas (DG) (for example, a combination of straight lines and curves), and the present invention is not limited by the structure and shape of the discharge line 110. It is not limited or limited.

A methane oxidation catalyst (MOC) 120 is provided in the exhaust line 110 to remove methane (unburned methane) by oxidizing methane contained in the exhaust gas (DG).

The methane oxidation catalyst 120 may be provided at various locations in the discharge line 110 depending on required conditions and design specifications, and the present invention is not limited or limited by the location of the methane oxidation catalyst 120.

As an example, the methane oxidation catalyst 120 may be provided in a substantially straight portion of the discharge line 110. According to another embodiment of the present invention, it is also possible to provide a methane oxidation catalyst at a curved portion of the discharge line or other portions.

As the methane oxidation catalyst 120, various catalysts capable of oxidizing methane can be used, and the present invention is not limited or limited by the type and characteristics of the methane oxidation catalyst 120.

For example, platinum, palladium, ceramic, etc. may be used as the methane oxidation catalyst 120.

The regeneration gas supply line 210 is connected to the discharge line 110 upstream of the methane oxidation catalyst 120 to selectively supply regeneration gas (CG) for regenerating the methane oxidation catalyst 120. .

This is due to the fact that when the usage time of the methane oxidation catalyst 120 elapses beyond a certain level (for example, 200 to 300 hours of usage time), the methane oxidation catalyst 120 is deactivated in a state in which it is difficult to remove methane. This is to regenerate (activate) the methane oxidation catalyst 120 by supplying regeneration gas (CG) to the methane oxidation catalyst 120 when the methane oxidation catalyst 120 is deactivated.

In this way, by regenerating the methane oxidation catalyst 120, the performance (methane removal performance) of the methane oxidation catalyst 120 can be restored to its initial state.

The regeneration gas supply line 210 can be provided in various structures capable of supplying regeneration gas (CG) upstream of the methane oxidation catalyst 120, and the present invention can be used according to the structure and shape of the regeneration gas supply line 210. It is not restricted or limited.

According to a preferred embodiment of the present invention, the regeneration gas supply line 210 may be connected to the discharge line 110 between the conversion member 140 and the methane oxidation catalyst 120.

For reference, in the embodiment of the present invention, regeneration gas (CG) may be defined as a gas used to regenerate the deteriorated methane oxidation catalyst 120.

As the regeneration gas (CG), various gases capable of regenerating the methane oxidation catalyst 120 can be used, and the present invention is not limited or limited by the type and characteristics of the regeneration gas (CG).

According to a preferred embodiment of the present invention, methane (CH ₄ ), oxygen (O ₂ ), and nitrogen (N ₂ ), which are used as fuel in ships, can be used as regeneration gas (CG).

The heating catalyst 220 is provided in the regeneration gas supply line 210 to heat the regeneration gas (CG) by an exothermic reaction.

That is, in order to regenerate the deactivated methane oxidation catalyst 120, the regeneration gas (CG) must be supplied at a high temperature, and the heating catalyst 220 regenerates the regeneration gas (CG) at a high temperature (e.g. , 600°C or higher).

As the heating catalyst 220, various catalysts capable of inducing an exothermic reaction of the regeneration gas (CG) can be used, and the present invention is not limited or limited by the type and characteristics of the heating catalyst 220.

For example, a non-precious metal material may be used as the heating catalyst 220. Preferably, cerium (Ce), manganese (Mn), etc., which can withstand high temperatures well and do not require regeneration, can be used as the heating catalyst 220.

According to a preferred embodiment of the present invention, regeneration gas (CG) containing methane, oxygen, and nitrogen may be heated to an exothermic reaction while passing through the heating catalyst 220.

More specifically, the chemical reaction caused by the heat generation of the regeneration gas (CG) passing through the heating catalyst 220 may satisfy the following formula [1].

[Formula 1]

CH ₄ + O ₂ → 0.5 CH ₄ + 0.5 CO ₂ + H ₂ O

For reference, nitrogen, which constitutes the regeneration gas, does not participate in the exothermic reaction caused by the heating catalyst, so it can be excluded from the chemical formula [1].

According to an embodiment of the present invention, the regeneration gas (CG') passing through the heating catalyst 220 is heated by an exothermic reaction, so that the regeneration gas (CG') is heated while passing through the heating catalyst 220 and is simultaneously regenerated. Oxygen contained in the gas (CG') can be removed.

This is due to the fact that the lower the oxygen specific gravity of the regeneration gas (CG') supplied to the methane oxidation catalyst 120, the better the regeneration efficiency and regeneration performance of the methane oxidation catalyst 120. In an embodiment of the present invention, The beneficial effect of further improving the regeneration efficiency and regeneration performance of the methane oxidation catalyst 120 is achieved by allowing the regeneration gas (CG') to be heated by an exothermic reaction and simultaneously removing the oxygen contained in the regeneration gas (CG'). You can get it.

In particular, the embodiment of the present invention allows the oxygen contained in the regeneration gas (CG') to be removed when the regeneration gas (CG') is heated (during an exothermic reaction), thereby regenerating the regeneration gas supplied to the methane oxidation catalyst 120. Since there is no need to provide a separate oxygen filter to remove oxygen from the gas (CG'), the advantageous effect of simplifying the process and structure for regenerating the methane oxidation catalyst 120 and improving space utilization and design freedom can be obtained. there is.

According to a preferred embodiment of the present invention, the methane oxidation catalyst regeneration system 10 has one end connected to the discharge line 110 upstream of the methane oxidation catalyst 120, and the other end is connected to the methane oxidation catalyst 120. It is connected to the discharge line 110 at the downstream of (120) and selectively bypasses the exhaust gas (DG) from upstream of the methane oxidation catalyst (120) to downstream of the methane oxidation catalyst (120). It may include a pass line 130.

The bypass line 130 can be provided in various structures that can bypass the exhaust gas (DG) from upstream of the methane oxidation catalyst 120 to the downstream of the methane oxidation catalyst 120, and the bypass line 130 The present invention is not limited or restricted by the structure and form.

As an example, the bypass line 130 may be formed to have an approximately 'U' shape.

In this way, by providing the bypass line 130, while the methane oxidation catalyst 120 is being regenerated, the exhaust gas DG discharged from the engine 20 does not pass through the methane oxidation catalyst 120. It may be discharged to the outside along the bypass line 130.

According to a preferred embodiment of the present invention, the methane oxidation catalyst regeneration system 10 is provided in the discharge line 110 upstream of the methane oxidation catalyst 120, and the movement path of the exhaust gas (DG) It may include a switching member 140 that selectively switches to the bypass line 130.

The switching member 140 may be provided in various structures that can switch the movement path of the exhaust gas (DG) discharged from the engine 20 to the methane oxidation catalyst 120 or the bypass line 130. The present invention is not limited or restricted by the structure and operation method of (140).

As an example, the switching member 140 rotates about one end and can be configured to move from a first position blocking the inlet of the methane oxidation catalyst 120 to a second position blocking the inlet of the bypass line 130. there is.

Preferably, when the switching member 140 is placed in the first position, the inlet of the bypass line 130 can be opened, and on the contrary, when the switching member 140 is placed in the second position, methane oxidation occurs. The inlet of the catalyst 120 may be open.

The switching point of the exhaust gas (DG) by the switching member 140 (the point at which the switching member moves to the first or second position) may vary depending on required conditions and design specifications.

According to a preferred embodiment of the present invention, the switching member 140 switches the movement path of the exhaust gas (DG) to the bypass line 130 while supplying the regeneration gas (CG') to the methane oxidation catalyst 120. It can be configured to do so.

Referring to FIG. 2, in the regeneration stage of the methane oxidation catalyst 120, the regeneration gas (CG) is supplied and the bypass line 130 is opened by the switching member 140 (the inlet of the methane oxidation catalyst is blocked). It can be. Accordingly, the exhaust gas (DG) discharged from the engine 20 can be discharged as is along the bypass line 130 without passing through the methane oxidation catalyst 120, and the methane oxidation catalyst 120 only produces heat for the exothermic reaction. Only regeneration gas (CG') heated by

On the other hand, referring to FIG. 3, after the regeneration of the methane oxidation catalyst 120 is completed, the supply of regeneration gas (CG) is blocked, the bypass line 130 is blocked by the switching member 140, and methane is released. By opening the inlet of the oxidation catalyst 120, the exhaust gas DG discharged from the engine 20 can be discharged to the outside in a processed state (methane removed) through the methane oxidation catalyst 120.

Meanwhile, in the above-described and illustrated embodiment of the present invention, an example in which only one switching member 140 rotates around one end and changes the movement path of the exhaust gas DG is explained, but other embodiments of the present invention According to an example, it is possible to change the movement path of exhaust gas using a plurality of switching members, or to change the movement path of exhaust gas using another switching device such as a three-way valve.

The regeneration time of the methane oxidation catalyst 120 may vary depending on required conditions and design specifications.

As an example, the regeneration time (the time during which regeneration gas is supplied to the methane oxidation catalyst) of the methane oxidation catalyst 120 may be defined as about 30 minutes.

Preferably, the regeneration step of the methane oxidation catalyst 120 can be performed when the ship passes through an ECA (Emission Control Area).

Meanwhile, in the above-described and illustrated embodiment of the present invention, the regeneration gas (CG) includes methane, oxygen, and nitrogen, but according to another embodiment of the present invention, air is used instead of oxygen. It is also possible.

That is, according to a preferred embodiment of the present invention, the regeneration gas (CG) supplied to the methane oxidation catalyst 120 may include methane (or reduction gas), air, and nitrogen.

In addition, in the above and illustrated embodiments of the present invention, the regeneration gas (CG) includes methane, oxygen, and nitrogen, but according to another embodiment of the present invention, hydrocarbons are used instead of methane. It is also possible.

That is, according to a preferred embodiment of the present invention, the regeneration gas (CG) supplied to the methane oxidation catalyst 120 may include hydrocarbons (eg, C2 to C5), oxygen, and nitrogen.

In addition, in the above and illustrated embodiments of the present invention, the regeneration gas (CG) includes methane, oxygen, and nitrogen, but according to another embodiment of the present invention, reduction gas is used instead of methane. It is also possible to do so.

That is, according to a preferred embodiment of the present invention, the regeneration gas (CG) supplied to the methane oxidation catalyst 120 may include reducing gas, oxygen, and nitrogen.

The type and characteristics of the reducing gas can vary depending on the required conditions and design specifications. As an example, the reducing gas may include at least one of hydrogen, ammonia, and hydrocarbons used to treat exhaust gas (DG) on ships.

Although the above description focuses on the examples, this is only an example and does not limit the present invention, and those skilled in the art will be able to You will see that various variations and applications are possible. For example, each component specifically shown in the examples can be modified and implemented. And these variations and differences in application should be construed as being included in the scope of the present invention as defined in the appended claims.

10: Methane oxidation catalyst regeneration system
20: engine
110: discharge line
120: Methane oxidation catalyst
130: bypass line
140: transition member
210: Regeneration gas supply line
220: Heating catalyst

Claims (12)

An exhaust line that discharges exhaust gas;
A methane oxidation catalyst provided in the discharge line and removing methane from the exhaust gas;
A regeneration gas supply line connected to the discharge line upstream of the methane oxidation catalyst and selectively supplying regeneration gas for regenerating the methane oxidation catalyst; and
A heating catalyst provided in the regeneration gas supply line and heating the regeneration gas by an exothermic reaction;
A methane oxidation catalyst regeneration system comprising:
According to paragraph 1,
One end is connected to the discharge line upstream of the methane oxidation catalyst, and the other end is connected to the discharge line downstream of the methane oxidation catalyst, and the exhaust gas is oxidized to methane. A methane oxidation catalyst regeneration system comprising a bypass line that selectively bypasses from upstream of the catalyst to downstream of the methane oxidation catalyst.
According to paragraph 2,
A methane oxidation catalyst regeneration system provided in the discharge line upstream of the methane oxidation catalyst and comprising a switching member that selectively switches the movement path of the exhaust gas to the bypass line.
According to paragraph 3,
The switching member is a methane oxidation catalyst regeneration system that switches the movement path of the exhaust gas to the bypass line while supplying the regeneration gas to the methane oxidation catalyst.
According to paragraph 1,
The regeneration gas is a methane oxidation catalyst regeneration system containing reducing gas, oxygen, and nitrogen.
According to clause 5,
A methane oxidation catalyst regeneration system in which the heating catalyst removes at least a portion of the oxygen from the regeneration gas by the exothermic reaction.
According to clause 5,
The reducing gas is a methane oxidation catalyst regeneration system containing at least one of hydrogen, ammonia, and hydrocarbon.
In clause 7,
The hydrocarbon is a methane oxidation catalyst regeneration system including methane.
According to paragraph 1,
The regeneration gas is a methane oxidation catalyst regeneration system containing methane, air, and nitrogen.
A methane oxidation catalyst regeneration method for removing methane from exhaust gas,
Heating the regeneration gas by an exothermic reaction using a heating catalyst; and
Regenerating the methane oxidation catalyst by supplying the regeneration gas heated by the heating catalyst to the methane oxidation catalyst;
A methane oxidation catalyst regeneration method comprising.
According to clause 11,
A method for regenerating a methane oxidation catalyst in which, while heating the regeneration gas, at least some of the oxygen contained in the regeneration gas is removed by the exothermic reaction.
According to clause 10,
During regeneration of the methane oxidation catalyst, the exhaust gas bypasses the methane oxidation catalyst and is discharged to the outside.

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