KR102387018B1 - Syngas engine and generation system comprising the same syngas engine - Google Patents

Abstract

An object of the present invention is a syngas engine and the syngas engine that uses syngas generated from a gasification process using coal, waste, biomass, etc. as a fuel, and is heated with waste heat generated in the gasification process so that stable combustion can be achieved. To provide a power generation system comprising a.

Description

Syngas engine and a power generation system comprising the syngas engine {Syngas engine and generation system comprising the same syngas engine}

The present invention relates to a syngas engine, and more specifically, syngas produced through gasification using coal, biomass, waste, etc. as raw materials, and having a significantly lower calorific value compared to commonly used fuels ( Synthetic gas engine driven by burning synthetic gas, syngas) and to a power generation system including the syngas engine.

The thermal power generation technology using coal is one of the traditional power generation technologies, in which coal is directly burned to generate steam, and the steam is used to turn a turbine to generate power. Thermal power generation is a very efficient power generation technology, but there is a problem that the generation of waste by-products such as harmful exhaust gas has a large adverse effect on the environment. Research to further develop the advantages of thermal power generation while resolving these problems has been continuously conducted, and as a part of such research, the Integrated Gasification Combined Cycle technology is gradually expanding.

Coal gasification combined cycle power generation involves converting coal into syngas containing hydrogen (H ₂ ) and carbon monoxide (CO) as main components, then removing harmful substances such as dust and sulfur oxides contained in the syngas, It is a technology for combined power generation by refining to a level similar to gas. In addition, the target of such gasification technology is not limited to coal, and it is gradually developed to use various materials containing hydrocarbons as raw materials similar to coal, such as waste such as waste plastics and biomass. The coal gasification combined cycle power generation technology has higher power generation efficiency than the classic coal-fired power generation technology, and is an environmentally friendly technology that can reduce more than 90% of sulfur oxides, more than 75% of nitrogen oxides, and up to 25% of carbon dioxide compared to direct combustion power generation. For this reason, countries around the world are working hard to develop it.

Syngas generated in the coal gasification process is used for various purposes, and in general, it is used to produce fuels (diesel, kerosene, gasoline, etc.) that can be commonly used by us through FT (Fischer & Tropsh) reaction. used Alternatively, such syngas may be used as it is as a fuel for an internal combustion engine (engine). This syngas-powered engine is used to provide the rotational power of the generator, which in turn makes it possible not only to obtain industrial fuel from the coal gasification process, but also to produce electricity.

However, since this syngas has a very low calorific value compared to high-grade fuels such as diesel, gasoline or natural gas used as fuel for general generator engines, thermal efficiency is very low even if unburned or burned, so it is used as fuel for power generation It is well known that they are not very fit to be. More specifically, for example, the calorific value of natural gas is about 8,000 to 10,000 kcal/m ³ , whereas the calorific value of syngas is extremely low, about 1,000 to 1,500 kcal/m ³ . Therefore, there is a problem that combustion does not occur properly when using an engine designed assuming high-grade fuel such as diesel, gasoline, natural gas, or the like, or a driving method of such an engine.

In order to solve this problem, an engine using a low calorific value fuel generally uses the following two solutions. First, a mixed-fired engine that injects diesel for smooth ignition is used, or secondly, an all-fired engine is used, but the engine itself is heated so that ignition can occur well.

The case of using the co-firing engine will be described in detail as follows. The mixed firing method is a method in which diesel is supplied little by little at the time of ignition so that ignition for combustion can occur smoothly. As described above, since diesel is a high-quality fuel with a high calorific value, ignition can occur easily even with a small amount. As soon as ignition occurs, stable combustion can be achieved even if low-grade fuel with a low calorific value is supplied, so diesel only needs to be injected in a small amount enough to be ignited. That is, in the co-firing engine, diesel is not used as the main fuel, but only for ignition, and syngas is used as the main fuel. As described above, the technology of applying a compression ignition type co-firing engine to an engine using syngas generated in the coal gasification process as a fuel is disclosed in Korean Patent Registration No. 1953737 (“Gasizer-linked syngas co-firing engine operation method”, 2019.02.25 .) et al. However, this method has a problem that diesel must be continuously injected for ignition every engine operating cycle, and that using high-grade fuel in an engine to utilize low-grade fuel itself can be a waste of resources.

A detailed description of the case of using the all-electric engine is as follows. As described above, in the case of a mixed-fired engine, there is a problem in that high-grade fuel must be wasted in order to utilize low-grade fuel. If so, you may be able to think about using an all-electric engine that burns only one type of fuel. In general, a spark ignition method (that is, a method of ignition using an electric spark) is used in an all-electric engine, but since syngas has a low calorific value, it is difficult to burn with the spark ignition method. In Korea Patent Registration No. 2086651 (“Independent Energy Production Plant System Using Coal Resources”, March 3, 2020), in order to apply a spark ignition type burnout engine to an engine using syngas generated in the coal gasification process as a fuel, , a solution to increase the calorific value of syngas by supplying high concentration of oxygen in the process of syngas production is being used. However, in the case of syngas produced by the general method (without supplying high concentration of oxygen), the calorific value is still low. Accordingly, when a low calorific value fuel such as syngas is applied to a burn-out engine (an engine that burns only one type of fuel), a technology that ignites by compression ignition (unlike general burn-in engines are ignited by spark ignition) This has been studied Briefly, it is to supply only one type of syngas as fuel to the engine (burn-out engine), but ignite by compression ignition method while heating the engine itself to create a high-temperature environment (compression ignition). In this way, the process from ignition to combustion becomes much more stable and smooth engine operation is possible. However, in this case, additional energy must be consumed for engine heating, resulting in another type of energy wastage.

1. Korean Patent Registration No. 1953737 (“Method of operating a gasifier-linked syngas co-firing engine”, 2019.02.25.) 2. Korean Patent Registration No. 2086651 (“Independent energy production plant system using coal resources”, 2020.03.03.)

Therefore, the present invention has been devised to solve the problems of the prior art as described above, and an object of the present invention is to use, as a fuel, syngas generated from a gasification process using coal, waste, biomass, etc. as a fuel, but stable combustion An object of the present invention is to provide a syngas engine heated with waste heat generated in the gasification process so that the syngas can be made, and a power generation system including the syngas engine.

The syngas engine of the present invention for achieving the above object is formed in the form of an internal combustion engine driven by receiving fuel and air and burning the fuel inside, and a synthesis using syngas produced in the gasification process as a fuel In the gas engine, the syngas engine is a combustion engine that is ignited in a compression ignition method and burns only one type of syngas fuel, and at least one selected from syngas or air supplied to the syngas engine is used in the gasification process. After being heated by the generated waste heat, it may be formed to be supplied to the syngas engine.

At this time, the syngas engine is used in the gasification process and waste heat is generated in the gasifier 20 for gasifying a raw material containing hydrocarbon, at least one selected from syngas or air supplied to the syngas engine, It may be formed to absorb waste heat generated in the gasifier 20 to be heated.

More specifically, in the syngas engine, a flow path for supplying syngas to the syngas engine is formed to surround the gasifier 20 at least once, so that the syngas supplied to the syngas engine is supplied to the gasifier. It may be formed to absorb waste heat generated in (20).

Alternatively, in the synthesis gas engine, a flow path for supplying air to the synthesis gas engine is formed to surround the gasifier 20 at least once, so that the air supplied to the synthesis gas engine is generated in the gasifier 20 It can be formed to absorb waste heat.

In addition, the power generation system 100 including the syngas engine of the present invention includes a pre-processing unit 10 for pre-processing a raw material containing hydrocarbon; a gasifier 20 for gasifying the raw material pretreated in the preprocessor 10; a purification unit 30 for purifying the gas generated in the gasification unit 20 to produce synthesis gas; an FT reaction unit 40 that receives a portion of the synthesis gas produced in the refining unit 30 and produces industrial fuel including gasoline and diesel through FT reaction; a power generation unit 50 that receives the remaining part of the syngas produced by the refining unit 30 and generates electricity by driving a generator using a syngas engine; Including, wherein the syngas engine is ignited in a compression ignition method and is a burnt engine in which only one type of syngas fuel is burned, at least one selected from syngas or air supplied to the syngas engine is the gasifier ( 20) may be formed to be supplied to the syngas engine after being heated by the waste heat generated in the process.

At this time, the power generation system 100 is formed such that a flow path for supplying syngas to the syngas engine surrounds the gasifier 20 at least once, so that the syngas supplied to the syngas engine is supplied to the gasifier. It may be formed to absorb waste heat generated in (20).

Alternatively, the power generation system 100 is formed such that a flow path for supplying air to the synthesis gas engine surrounds the gasifier 20 at least once, so that the air supplied to the synthesis gas engine is supplied to the gasifier 20 . It may be formed to absorb waste heat generated in the

In addition, the power generation unit 50 receives more off-gas remaining unreacted from the FT reaction unit 40 and additionally supplies it to the synthesis gas engine, or further drives a separate generator using a separate engine. can be formed to

According to the present invention, there is a great effect that the engine can achieve stable combustion and smooth operation while using only syngas as a fuel. Specifically, in the case of an engine using syngas generated from a gasification process using coal, waste, biomass, etc. as a fuel, there is a problem in that stable operation cannot be achieved because the calorific value of the syngas itself is too low. Accordingly, conventionally, a mixed combustion engine using diesel as an ignition source has been generally used, but in this case, there is a problem in that diesel, which is a high-grade fuel, is wasted in order to drive an engine using syngas, which is a low-grade fuel, as a main fuel. In the case of a combustion engine that burns only a single fuel, a spark ignition method is generally used. Accordingly, a method of creating a high-temperature environment in which the engine itself is heated so that the combustion engine burns only a single fuel of syngas, but uses a compression ignition method, and enables combustion of syngas, which is a low calorific value, by the compression ignition method, has been developed. The method required a separate device for heating the engine, and there was a problem in that a separate energy wasted to heat the engine.

However, according to the present invention, a syngas engine is ignited in a compression ignition method, but only one type of syngas fuel is burned, but by heating the engine with waste heat generated in the gasification process, separate energy for engine heating It eliminates the need for consumption. That is, in the syngas engine itself, a stable high-temperature environment is created, so there is an effect that smooth and stable operation is possible without problems such as the engine being turned off. In addition, since there is no need for additional energy to be consumed in such a high-temperature environment composition, ultimately, there is a great effect of dramatically improving overall system efficiency.

1 is a power generation system using a general gasification process.
Figure 2 is a conventional syngas engine included in the power generation system of Figure 1.
Figure 3 is a first embodiment of the syngas engine of the present invention included in the power generation system of Figure 1.
Figure 4 is a second embodiment of the syngas engine of the present invention included in the power generation system of Figure 1.

Hereinafter, a syngas engine according to the present invention having the configuration as described above and a power generation system including the syngas engine will be described in detail with reference to the accompanying drawings.

1 shows a power generation system using a general gasification process. As shown, the power generation system 100 using a gasification process includes a pre-processing unit 10, a gasification unit 20, a purification unit 30, and FT reaction. It includes a unit 40 and a power generation unit 50 . The syngas engine of the present invention is included in the power generation unit 50, and each part of the power generation system 100 will be described in more detail in order to more clearly understand the operating principle of the syngas engine of the present invention.

The pre-processing unit 10 serves to pre-treat raw materials including hydrocarbons, such as coal and waste such as waste plastics, biomass, etc. to increase the fixed carbon ratio, and then supply it to the gasifier 20 . Basically, this gasification process is based on coal, and coal is mainly composed of combustible components, such as fixed carbon and volatile components, and non-combustible components such as moisture, ash and other minerals. Fixed carbon is the main component of coal utilization, and the higher the fixed carbon ratio, the higher the quality of coal, and the higher the calorific value and conversion efficiency. That is, this fixed carbon becomes the main raw material in the gasification process to be carried out later. However, the remaining components (volatile components, ash, etc.) may adversely affect the gasification process. Volatile components are produced in large amounts when the degree of carbonization is low, and combustion is difficult when the ratio of volatile components is high. In particular, ash greatly reduces the calorific value and conversion efficiency of coal. In order to utilize the low-grade coal with a low fixed carbon ratio, it is necessary to pre-treat the coal. In the run of mine coal extracted from the coal seam, refined coal with a high fixed carbon component and gangue, which is a crushing stone of rocks, are mixed. Since it causes (SOx) to be generated, it is necessary to pre-treat the coal before supplying the coal to the gasifier 20 .

The gasifier 20 serves to gasify the raw material pretreated in the preprocessor 10 to generate syngas. More specifically, in the gasifier 20, heat and synthesis gas (CO, H) through a gasification process in which coal, low-grade residual oil, industrial waste, biomass, etc., which are substances composed of hydrocarbons, react with oxygen or steam, etc. ₂ ) is created. Here, the gasification reaction is not a single reaction, but drying in which moisture is removed from a solid hydrocarbon material near 100 °C, pyrolysis in which solid volatile components are removed in the range of 350 °C to 550 °C, and carbon and oxygen react from 500 °C or higher to heat It is a complex reaction in which combustion to create syngas and gasification to produce syngas occur sequentially or simultaneously. Through pyrolysis, solid hydrocarbons are converted into char composed only of hydrocarbon substances and ash, and heat is required to react the char. Syngas produced when water vapor and high concentration oxygen are used as gasifiers are mainly CO and H ₂ , which can be medium calorific gases (around 3,000 kcal/m ³ ) with relatively high calorific value, but generally air instead of oxygen is used, and in this case, the nitrogen component in the generated gas is increased to become a low calorific gas (around 1,000 kcal/m ³ ) with a low calorific value. In addition, sulfur and nitrogen components contained in solid hydrocarbons react with hydrogen or carbon monoxide in a gasification reaction to change into H ₂ S, COS, CS ₂ , NH ₃ to form a compound of a different type from the gas emitted by combustion. .

The purification unit 30 serves to remove foreign substances or harmful gases from the synthesized gas generated after the gasification process in the gasification unit 20 . As described above, since the gas generated in the gasifier 20 contains various harmful gases in addition to components that can be effectively used, it is difficult to use it as it is before being purified in the purification unit 30 . Therefore, it can be seen that the production of synthesis gas is completed only after the gas generated by the gasification process in the gasifier 20 is removed from the gas by the purification part 30 , such as foreign substances or harmful gases.

In this way, as shown in FIG. 1 , the synthesis gas produced by the purification unit 30 is partially supplied to the FT reaction unit 40 and used for the FT reaction, and the remaining portion is sent to the power generation unit 50 . supplied and used for power generation.

The FT reaction unit 40 receives the syngas and hydrogen supplied after purification and serves to produce industrial fuel such as diesel or gasoline through the FT reaction. FT reaction, developed by Fischer and Tropsh, is a reaction that is the basis of petrochemical process. It targets the production of alkanes (CnH(2n+2) from syngas CO and H ₂ ). Most of the syngas supplied to the FT reaction unit 40 participates in the FT reaction and is used for industrial fuel production, but depending on the amount of hydrogen supplied or the process environment, it cannot participate in the FT reaction, so unused gas remains. In this way, the gas that is not utilized in the FT reaction is called offgas, and the offgas is also a medium-calorie gas or a low-calorie gas similar to synthesis gas.

The power generation unit 50 serves to generate electricity by receiving the remaining part of the syngas produced by the refining unit 30 and driving the generator using the syngas engine. As such, in the power generation system 100 , the FT reaction unit 40 produces industrial fuel, and the power generation unit 50 produces electricity. The syngas engine of the present invention is included in the power generation unit 50, that is, the syngas engine is basically formed in the form of an internal combustion engine driven by receiving fuel and air and burning the fuel inside, and the gasification process syngas produced in the As is well known, in general, a generator produces electricity by rotating by external power, that is, in the power generation unit 50, electricity is produced by rotating the generator by the rotational force generated by driving the synthesis gas engine. Meanwhile, the power generation unit 50 may further receive the off-gas remaining unreacted from the FT reaction unit 40 and use it for power generation as well. Offgas may be mixed with syngas and additionally supplied to the syngas engine, or may be formed to further drive a separate generator using a separate engine exclusively for offgas.

Now, the syngas engine of the present invention will be described in more detail. First, FIG. 2 briefly shows a conventional syngas engine included in the power generation system of FIG. 1 . As described above, the power generation unit 50 includes a syngas engine and a generator, the syngas engine is driven by receiving syngas and air, and the generator is driven in connection with the driving force to generate electricity. That is, synthesis gas and air are supplied to the power generation unit 50 . Synthesis gas is produced by a gasification process in the gasification unit 20 , and can be used only after foreign substances and harmful gases are removed from the purification unit 30 . In the power generation system 100, only some subsystems 150 related to the syngas engine are separately shown in FIG. 2, and in FIG. 1, the subsystem 150 is indicated by a dotted line.

As described above, high-grade fuels such as diesel, gasoline, or natural gas used as fuel for general generator engines have a high calorific value of 8,000 to 10,000 kcal/m ³ , whereas synthetic gas has 1,000 to 1,500 kcal/m ³ It has an extremely low calorific value. Of course, when a high concentration of oxygen is supplied to the gasifier 20, the calorific value can be increased to the level of a medium calorific gas (around 3,000 kcal/m ³ ). However, in order to supply high-concentration oxygen, a separate device such as an electrolysis device or an oxygen generator must be further provided, and such devices are often not provided in a general field of practice. In other words, it can be seen that most of the sites produce low-calorie gas. As such, syngas, which is a low-grade fuel with a low calorific value, does not burn smoothly, so there is a high risk of problems such as turning off the start of the syngas engine.

Conventionally, in order to solve this problem in a syngas engine, a compression ignition type mixed combustion engine (an engine in which two types of fuel, ie, syngas and diesel are mixed and supplied) was used in most cases. However, consumption of high-grade fuel (diesel) for the utilization of low-grade fuel (syngas) itself can be a waste of resources, and in the case of a spark ignition type all-fire engine (single fuel, that is, an engine supplied with only syngas), Since syngas is a low calorific value fuel, combustion is impossible, so there has been an attempt to use a method in which a combustion engine is ignited by a compression ignition method. As described above, since syngas is a low-calorie gas that does not easily ignite and burn, in order to apply a compression ignition type combustion engine to a syngas engine (to create a high-temperature environment in which ignition and combustion can be performed more smoothly) ) was used to heat the engine with a separate heater. At this time, since separate energy must be consumed again to heat the engine, as a result, there is a problem in that the overall system efficiency is lowered.

In the present invention, in order to solve this problem, first, the syngas engine is ignited in a compression ignition method so that only one type of syngas fuel is burnt in the form of a burn-out engine. This eliminates the need to waste premium fuels such as diesel for combustion. Next, heat for creating a high-temperature environment for stable combustion is obtained in the gasification process of the power generation system 100 . That is, instead of having a separate engine heating device for creating a high-temperature environment, at least one selected from syngas or air supplied to the syngas engine is heated by waste heat generated in the gasification process and then supplied to the syngas engine to be formed as much as possible.

In more detail, it is as follows. As described above, in the gasifier 20, various processes are performed to gasify raw materials including hydrocarbons, such as coal, waste, biomass, and the like. Among the various processes included in the gasification process, the drying process is performed in a temperature environment of about 100 °C, the pyrolysis process is about 350 °C to 550 °C, and the combustion process is about 500 °C. Therefore, in the gasifier 20, considerable waste heat during the process This happens. In the present invention, at least one selected from the syngas or air supplied to the syngas engine absorbs the waste heat generated by the gasifier 20 to be heated.

As described above, in the related art, as shown in FIG. 2 , the syngas produced through the gasifier 20 and the refining unit 30 sequentially and the air drawn from the outside are transferred directly to the syngas engine of the power generation unit 50 . was supplied The synthesis gas discharged from the gasifier 20, which still contains foreign substances and harmful gases, still contains a large amount of heat, but loses a significant amount of heat as it passes through the refining unit 30, so it is synthesized as it is. When supplied to a gas engine, a high-temperature environment cannot be created with the amount of heat of syngas. Also, since the air drawn from the outside has a temperature of about room temperature, it is also not helpful in creating a high-temperature environment at all. However, in the present invention, at least one selected from the syngas or air supplied to the syngas engine absorbs the waste heat generated in the gasifier 20 and heats it, so that combustion can occur in the syngas engine well. A sufficiently high temperature environment can be smoothly created.

As a specific example, FIG. 3 is a first embodiment of the syngas engine of the present invention included in the power generation system of FIG. 1, and FIG. 4 is a second embodiment of the syngas engine of the present invention included in the power generation system of FIG. am. In the embodiment of FIG. 3 , a flow path for supplying syngas to the syngas engine is formed to surround the gasifier 20 at least once, so that the syngas supplied to the syngas engine is supplied to the gasifier 20 . It is formed to absorb waste heat generated from In the embodiment of Figure 4, the flow path for supplying air to the synthesis gas engine is formed to surround the gasifier 20 at least once, so that the air supplied to the synthesis gas engine is generated in the gasifier 20 formed to absorb waste heat. Although not shown in the drawings, on the same principle as in FIGS. 3 and 4 , both the flow path for supplying the synthesis gas to the synthesis gas engine and the flow path for supplying air are formed to surround the gasifier 20 at least once. By making it possible, both syngas and air may be supplied to the syngas engine in a heated state.

As described above, the gasifier 20 must consume a lot of thermal energy for the gasification process anyway. Naturally, considerable waste heat is generated in this process, and in the past, this waste heat was simply thrown away without being used anywhere. However, in the present invention, the syngas or air supplied to the syngas engine is heated by using this waste heat. That is, there is no additional energy consumed in the process of heating syngas or air, so there is no adverse effect on overall system efficiency. On the other hand, as the syngas or air supplied to the syngas engine is heated in advance, a high-temperature environment can be smoothly created in the syngas engine, and this high-temperature environment is a low-calorie gas with extremely low calorific value. and enables smooth and stable ignition and combustion. That is, according to the present invention, the overall system efficiency is not reduced and, for stable operation of the syngas engine, it does not consume high-grade fuel (when a mixed-fire engine is applied) or a separate heater driving energy (when a burn-out engine is applied), while syngas It is to create a sufficiently high-temperature environment for the engine to ensure stable and continuous operation.

The present invention is not limited to the above-described embodiments, and the scope of application is varied, and anyone with ordinary knowledge in the field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims It goes without saying that various modifications are possible.

100: power generation system 150: subsystem
10: pre-processing unit 20: gasification unit
30: refining unit 40: FT reaction unit
50: power generation unit

Claims (8)

In a syngas engine formed in the form of an internal combustion engine driven by receiving fuel and air and burning the fuel inside, and using syngas produced in a gasification process as a fuel,
The syngas engine is a combustion engine that is ignited in a compression ignition method and burns only one type of syngas fuel,
Syngas engine, characterized in that formed so that at least one selected from among syngas or air supplied to the syngas engine is heated by waste heat generated in the gasification process and then supplied to the syngas engine.
According to claim 1, wherein the syngas engine,
It is used in the gasification process and waste heat is generated in the gasifier that gasifies raw materials containing hydrocarbons,
Syngas engine, characterized in that at least one selected from the synthesis gas or air supplied to the synthesis gas engine is formed to be heated by absorbing the waste heat generated in the gasifier.
According to claim 2, wherein the syngas engine,
A flow path for supplying syngas to the syngas engine is formed to surround the gasifier at least once,
Syngas engine, characterized in that the synthesis gas supplied to the synthesis gas engine is formed to absorb waste heat generated in the gasifier.
According to claim 2, wherein the syngas engine,
A flow path for supplying air to the synthesis gas engine is formed to surround the gasifier at least once,
Syngas engine, characterized in that the air supplied to the synthesis gas engine is formed to absorb waste heat generated in the gasifier.
A pre-processing unit for pre-processing a raw material containing hydrocarbons;
a gasifier for gasifying the raw material pretreated in the preprocessor;
a purification unit for purifying the gas generated in the gasification unit to produce synthesis gas;
an FT reaction unit receiving a portion of the synthesis gas produced in the refining unit and producing industrial fuel including gasoline and diesel through FT reaction;
a power generation unit that receives the remaining part of the synthesis gas produced in the refining unit and generates electricity by driving a generator using a synthesis gas engine;
including,
The syngas engine is a combustion engine that is ignited in a compression ignition method and burns only one type of syngas fuel,
At least one selected from the syngas or air supplied to the syngas engine is heated by the waste heat generated in the gasifier, and then is formed to be supplied to the syngas engine.
According to claim 5, wherein the power generation system,
A flow path for supplying syngas to the syngas engine is formed to surround the gasifier at least once,
The power generation system, characterized in that the synthesis gas supplied to the synthesis gas engine is formed to absorb waste heat generated in the gasifier.
According to claim 5, wherein the power generation system,
A flow path for supplying air to the synthesis gas engine is formed to surround the gasifier at least once,
Power generation system, characterized in that the air supplied to the synthesis gas engine is formed to absorb waste heat generated in the gasifier.
According to claim 5, wherein the power generation unit,
Power generation system, characterized in that it is further supplied with the off-gas remaining unreacted in the FT reaction unit and additionally supplied to the synthesis gas engine, or is formed to further drive a separate generator using a separate engine.

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