CN212177256U

CN212177256U - Vehicle with a steering wheel

Info

Publication number: CN212177256U
Application number: CN202020443316.9U
Authority: CN
Inventors: 小沢英隆; 菅文康
Original assignee: Honda Motor Co Ltd
Current assignee: Honda Motor Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-12-18
Anticipated expiration: 2030-03-31

Abstract

The utility model provides a vehicle, it can reduce the carbon dioxide emission of arranging outside the car. The vehicle V includes: an engine 1 that converts thermal energy generated by burning fuel into mechanical energy; CO 2₂A recovery device 3 that recovers carbon dioxide from exhaust gas flowing through an exhaust pipe 16 of the engine 1; high pressure H₂A tank 51 that stores hydrogen gas; a reactor 4 by passing CO₂Carbon dioxide recovered by the recovery device 3 and high pressure H₂The hydrogen supplied from the tank 51 reacts to reduce the carbon dioxide and generate methanol; and a fuel tank 20 for storing methanol generated in the reactor 4 as fuel. The engine 1 is a multi-cylinder reciprocating engine having a plurality of cylindersThe reaction cylinder 41 of the reactor 4 is one of a plurality of cylinders.

Description

Vehicle with a steering wheel

Technical Field

The utility model relates to a vehicle. More specifically, the present invention relates to a vehicle equipped with an internal combustion engine.

Background

An internal combustion engine converts thermal energy generated by burning hydrocarbon fuel such as gasoline or light oil in a cylinder into mechanical energy. In an internal combustion engine, carbon dioxide is contained in combustion gas generated by burning fuel. Therefore, a vehicle running by using mechanical energy obtained from the internal combustion engine emits carbon dioxide during running. On the other hand, carbon dioxide is considered to be a greenhouse gas that produces a greenhouse effect in the atmosphere. Therefore, in recent years, it has been demanded to reduce the carbon dioxide emission of vehicles.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2010-235550

SUMMERY OF THE UTILITY MODEL

(problem to be solved by the utility model)

For example, patent document 1 discloses a methanol synthesis technique for synthesizing methanol by reacting carbon dioxide with hydrogen. Therefore, it is considered that the carbon dioxide contained in the exhaust gas of the internal combustion engine is converted into methanol on the vehicle by using such a methanol synthesis technique, thereby reducing the amount of carbon dioxide discharged to the outside of the vehicle. However, at present, there is no example of the specific application of such methanol synthesis technology to vehicles.

An object of the utility model is to provide a vehicle, it can reduce the carbon dioxide emission outside arranging to the car.

(means for solving the problems)

(1) The vehicle (for example, a vehicle V described later) of the present invention is characterized by comprising: an internal combustion engine (for example, an engine 1 described later) that converts thermal energy generated by burning fuel into mechanical energy; recovery device (e.g., CO described later)₂A recovery device 3) that recovers carbon dioxide from an exhaust gas flowing through an exhaust passage of the internal combustion engine (for example, an exhaust pipe 16 described later); hydrogen gas supply source (e.g., high pressure H described later)₂A tank 51) that stores or generates hydrogen gas; a reactor (for example, a reactor 4 described later) for generating methanol by reacting the carbon dioxide recovered by the recovery device with the hydrogen gas supplied from the hydrogen gas supply source; and a fuel tank (for example, a fuel tank 20 described later) for storing methanol produced by the reactor as fuel.

(2) Preferably, in this case, a part of the heat energy obtained by combusting the fuel in the internal combustion engine is supplied to the reactor.

(3) Preferably, in this case, the gas in the reactor is compressed by a part of the mechanical energy obtained by the internal combustion engine.

(4) In this case, the internal combustion engine is preferably a multi-cylinder internal combustion engine having a plurality of cylinders (for example,

cylinders

11, 12, 13, and 41 described later), and the reaction cylinder of the reactor is at least one of the plurality of cylinders.

(5) Preferably, in this case, the vehicle includes a condenser (for example, a condenser 62 described later) that condenses the methanol-containing synthesis gas discharged from the reactor and separates the methanol-containing synthesis gas into a gas phase and a liquid phase, the liquid phase separated by the condenser is supplied to the fuel tank, and the gas phase separated by the condenser is supplied to the upstream side of the recovery device in the exhaust passage.

(effects of the utility model)

(1) The utility model discloses a vehicle possesses: a recovery device that recovers carbon dioxide from exhaust gas flowing through an exhaust passage of an internal combustion engine; a hydrogen supply source that stores or generates hydrogen; a reactor that generates methanol by reacting carbon dioxide recovered from the exhaust gas by the recovery device and hydrogen supplied from a hydrogen supply source; and a fuel tank for storing the methanol generated by the reactor as fuel. Therefore, according to the present invention, during the running of the vehicle, carbon dioxide generated by burning fuel in the internal combustion engine is recovered by the recovery device, converted into methanol in the reactor, and stored in the fuel tank as fuel. In addition, the fuel stored in the fuel tank can be supplied to the internal combustion engine again, being converted into mechanical energy. As described above, according to the present invention, since carbon dioxide generated by burning fuel in an internal combustion engine can be reused as fuel for the internal combustion engine, the amount of carbon dioxide discharged to the outside of the vehicle can be reduced as compared with the case where carbon dioxide discharged from the internal combustion engine is directly discharged to the outside of the vehicle.

(2) Since the methanol formation reaction of carbon dioxide and hydrogen is an exothermic reaction, the temperature rises to an appropriate temperature by its own reaction heat. However, since the temperature is low at the time of start-up, it is necessary to supply heat energy from the outside at least in the initial stage so that the reaction field becomes high temperature. In this regard, in the present invention, methanol can be generated from the initial stage by supplying a part of the heat energy obtained by burning fuel in the internal combustion engine to the reactor. Thus, methanol can be produced without affecting the fuel consumption of the vehicle. In addition, according to the present invention, it is not necessary to provide a heater for heating the reactor, and therefore, the configuration of the vehicle can be simplified.

(3) In order to react carbon dioxide and hydrogen to produce methanol, the reaction field needs to be set at a high pressure. In this regard, in the present invention, the gas in the reactor is compressed by a part of mechanical energy obtained by burning fuel in the internal combustion engine. Thus, methanol can be produced without affecting the fuel consumption of the vehicle. In addition, according to the present invention, it is not necessary to provide a pump for compressing the gas in the reactor, and therefore, the structure of the vehicle can be simplified.

(4) In the present invention, at least one of a plurality of cylinders of a multi-cylinder internal combustion engine is used as a reaction cylinder of a reactor. According to the present invention, with a simple configuration, the heat energy generated by burning the fuel in the other cylinders can be supplied to the reaction cylinder of the reactor, and the gas in the reaction cylinder can be further compressed by the mechanical energy generated by burning the fuel in the other cylinders.

(5) In the present invention, the synthesis gas containing methanol discharged from the reactor is condensed by the condenser and separated into a gas phase and a liquid phase, wherein the liquid phase containing methanol is supplied to the fuel tank, and the gas phase containing unreacted carbon dioxide and nitrogen is supplied to the upstream side of the recovery device. Thus, the unreacted carbon dioxide can be recovered by the recovery device and reused for the generation of methanol in the reactor, and therefore, the amount of carbon dioxide discharged to the outside of the vehicle can be further reduced.

Drawings

Fig. 1 is a diagram showing a structure of a vehicle according to an embodiment of the present invention.

Fig. 2 is a perspective view showing the configuration of the reactor.

Detailed Description

Next, a vehicle V according to an embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a diagram showing the structure of a vehicle V of the present embodiment. The vehicle V includes an internal combustion engine 1 (hereinafter, referred to as "engine") that converts thermal energy generated by burning a liquid hydrocarbon fuel into mechanical energy, and travels by driving wheels (not shown) using the mechanical energy obtained by the engine 1.

The vehicle V includes: an engine 1; a fuel supply device 2 that supplies fuel to the engine 1; CO 2₂A recovery device 3 for recovering carbon dioxide (CO) from exhaust gas flowing through an exhaust pipe 16 of the engine 1₂) (ii) a Reactor 4 from CO₂Methanol (CH) -containing product from carbon dioxide recovered by the recovery unit 3₃OH) synthesis gas; a hydrogen supply device 5 for supplying hydrogen (H) to the reactor 4₂) (ii) a And a methanol recovery unit 6 for recovering methanol from the synthesis gas discharged from the reactor 4.

The engine 1 is a multi-cylinder reciprocating engine, and includes: a plurality of (4 in the example of fig. 1)

cylinders

11, 12, 13, 41; pistons (not shown) disposed in the respective cylinders 11 to 13, 41 so as to freely reciprocate; and a crankshaft (not shown) that rotates by the reciprocating motion of the pistons.

In the following, some of the cylinders 11 to 13, 41 (in the example of fig. 1, the first cylinder 11, the second cylinder 12, and the third cylinder 13) formed in the engine 1 may be referred to as

combustion cylinders

11, 12, 13, and a fourth cylinder 41 other than the combustion cylinders 11 to 13 among the cylinders 11 to 13, 41 may be referred to as a reaction cylinder 41. The combustion cylinders 11 to 13 are provided with a 1 st ignition plug 11a, a 2 nd ignition plug 12a, and a 3 rd ignition plug 13a, respectively. These ignition plugs 11a to 13a are ignited in response to a command from a control device, not shown, and burn a mixture of fuel and air supplied into the combustion cylinders 11 to 13.

The intake pipe 15 is a pipe connecting the intake ports of the combustion cylinders 11 to 13 to the outside of the vehicle and introducing air from the outside of the vehicle into the combustion cylinders 11 to 13. A compressor 17a of a supercharger 17 is provided in the intake pipe 15.

The exhaust pipe 16 is a pipe connecting the exhaust ports of the combustion cylinders 11 to 13 to the outside of the vehicle. The exhaust pipe 16 is provided with a turbine 17b of a supercharger 17, an exhaust gas purification device 18, and CO in this order from the exhaust upstream side to the downstream side₂And a recovery device 3. In the combustion cylinders 11 to 13, exhaust gas generated by burning the mixed gas passes through the exhaust pipe 16, the turbine 17b, the exhaust gas purification device 18, and CO₂The recovery device 3 is discharged to the outside of the vehicle.

The supercharger 17 includes: a compressor 17a rotatably provided in the intake pipe 15, a turbine 17b rotatably provided in the exhaust pipe 16, and a rotary shaft 17c connecting the compressor 17a and the turbine 17 b. If the exhaust gas flowing through the exhaust pipe 16 acts, the turbine 17b rotates using the thermal energy or kinetic energy of the exhaust gas. The compressor 17a rotates in conjunction with the turbine 17b, compresses air flowing through the intake pipe 15, and supplies the air to the combustion cylinders 11 to 13.

The exhaust gas purification device 18 includes an exhaust gas purification catalyst (e.g., a three-way catalyst) and purifies unburned Hydrocarbons (HC), carbon monoxide (CO), nitrogen oxides (NOx), and the like contained in the exhaust gas discharged from the combustion cylinders 11 to 13 by the action of the exhaust gas purification catalyst.

The fuel supply device 2 includes: a fuel tank 20 that stores fuel; a first fuel injection valve 21 provided on an intake port communicating with the first cylinder 11; a second fuel injection valve 22 provided on an intake port communicating with the second cylinder 12; a third fuel injection valve 23 provided on an intake port communicating with the third cylinder 13; and a fuel supply pipe 24 connecting the fuel tank 20 and the fuel injection valves 21 to 23.

The fuel tank 20 stores liquid hydrocarbon fuel such as gasoline, methanol, or a mixed fuel in which these gasoline and methanol are mixed. The fuel supply pipe 24 compresses the fuel stored in the fuel tank 20 by a high-pressure pump not shown, and supplies the compressed fuel to the fuel injection valves 21 to 23. The fuel injection valves 21 to 23 are opened in response to a command from a control device not shown, and inject fuel supplied from the fuel supply pipe 24. A mixed gas obtained by mixing fuel injected from fuel injection valves 21 to 23 and air supplied from an intake pipe 15 is supplied into combustion cylinders 11 to 13.

CO₂The recovery device 3 includes: CO 2₂A separation device 31 for separating the exhaust gas flowing through the exhaust pipe 16 into a recovered gas containing carbon dioxide as a main component and nitrogen (N)₂) CO removal as a main component₂An exhaust gas; and, CO₂A pipe 32 through which CO is to pass₂The recovered gas separated by the separator 31 is introduced into the reactor 4.

CO₂The separation device 31 selectively adsorbs carbon dioxide in the exhaust gas flowing through the exhaust pipe 16 under a predetermined adsorption condition, and uses CO that desorbs the adsorbed carbon dioxide under a predetermined desorption condition₂Adsorbing material, thereby separating exhaust gas into recovered gas and CO₂And (4) exhaust gas. CO 2₂For the adsorbent, for example, a lithium composite oxide is used.

In the present embodiment, CO is used₂The adsorption/desorption characteristics of the carbon dioxide in the adsorbent, and the separation of the exhaust gas into a recovered gas and CO removal₂The situation of the exhaust gas is explained, but the present invention is not limited thereto. In CO₂In the separation device 31, CO that selectively permeates carbon dioxide in the exhaust gas flowing through the exhaust pipe 16 may be used₂A separation membrane for separating the exhaust gas into a recovered gas and CO₂And (4) exhaust gas. From CO₂CO removal separated by separation device 31₂The exhaust gas is discharged to the outside of the vehicle through a tail pipe not shown. In addition, from CO₂The recovered gas separated by the separator 31 is passed through CO₂The pipe 32 is supplied to the reactor 4.

CO₂A pipe 32 for introducing CO₂The recovered gas discharge part of the separator 31 and CO communicating with a reaction cylinder 41 described later₂The suction ports 43 are connected. From CO₂The recovered gas containing carbon dioxide separated by the separation device 31 is passed through CO₂The pipe 32 is supplied to the reaction cylinder 41.

The hydrogen gas supply device 5 includes:high pressure H₂A tank 51 storing hydrogen gas at high pressure; h₂An ejector 52 provided in the reactor 4; h₂A pipe 53 connected to the high pressure H₂Cases 51 and H₂An ejector 52; and, a regulator 54 disposed at H₂On the pipe 53.

Regulator 54 to store at high pressure H₂The hydrogen gas in the tank 51 is reduced to a set pressure and passes through H₂The pipe 53 is supplied to H₂And an ejector 52. H₂The injector 52 is opened in response to a command from a control device not shown, and injects the injection from the H into the reactor 4₂Hydrogen gas supplied through the pipe 53.

In the present embodiment, the hydrogen supply device 5 supplies the high pressure H stored in the reactor 4 to the hydrogen storage device₂The case of hydrogen gas in the tank 51 is explained, but the present invention is not limited thereto. The hydrogen supply means may supply hydrogen generated from water by, for example, an electrolysis means to the reactor 4, or may supply hydrogen generated from ammonia to the reactor 4.

Fig. 2 is a perspective view showing the configuration of the reactor 4. As shown in fig. 1 and 2, in the present embodiment, a case where a part of the engine 1 including the reaction cylinder 41 is used as the reactor 4 will be described.

Reactor 4, by reacting CO₂Carbon dioxide contained in the recovered gas recovered by the recovery device 3 and hydrogen supplied from the hydrogen supply device 5 react in a predetermined ratio in the reaction cylinder 41, thereby reducing the carbon dioxide and generating methanol. More specifically, the reactor 4 includes: a cylindrical reaction cylinder 41; a piston 42 that reciprocates in the reaction cylinder 41 in accordance with rotation of a crankshaft of the engine 1; a reaction chamber 48 defined by the top surface of the piston 42 and formed in the reaction cylinder 41; CO communicating with the interior of the reaction chamber 48₂A suction port 43 and a synthesis gas discharge port 44;

valves

43a, 44a provided at these COs₂Suction inlet 43 and synthesis gas outlet 44; an electrode cage 45 disposed within the reaction chamber 48; a granular catalyst 46 held by the electrode cage 45; and a DC power supply 47 connected to the electrode cage 45. In fig. 2, a cylinder head of the engine 1 is not shown, but is shown by a broken lineIndicates CO formed on the cylinder head in a hollow shape₂ A suction port 43 and a synthesis gas discharge port 44.

As shown in fig. 1 and 2, a part of the cylinders of the engine 1 is used as the reaction cylinder 41 of the reactor 4, and a part of the thermal energy obtained by burning the fuel in the combustion cylinders 11 to 13 adjacent to the reaction cylinder 41 is supplied to the reaction cylinder 41. This can maintain the temperature in the reaction chamber 48 in which the methanol synthesis reaction of carbon dioxide and hydrogen is performed at the set temperature, and further improve the efficiency of methanol production.

In addition, by using a part of the cylinders of the engine 1 as the reaction cylinder 41 of the reactor 4, the piston 42 is reciprocated by a part of the mechanical energy obtained by burning the fuel in the combustion cylinders 11 to 13, and the gas in the reaction chamber 48 is compressed. This can increase the pressure of the gas in the reaction chamber 48 to the set pressure, and can further improve the efficiency of methanol production.

In CO₂The above-mentioned CO is connected to the suction port 43₂A pipe 32. Therefore, if the valve 43a is opened, CO is connected₂When the piston 42 is lowered in the state of the suction port 43 and the reaction chamber 48, CO is supplied₂The recovery gas containing carbon dioxide separated by the separator 31 as a main component is introduced into the reaction chamber 48.

The synthesis gas discharge port 44 is connected to a methanol recovery device 6 described later. Therefore, if the valve 44a is opened and the piston 42 is raised in a state where the synthesis gas discharge port 44 and the reaction chamber 48 are communicated with each other, the synthesis gas generated in the reaction chamber 48 is discharged to the methanol recovery device 6.

The particulate catalyst 46 includes a substrate formed into a particulate shape and a methanol synthesis catalyst supported on the substrate. The methanol synthesis catalyst promotes a methanol synthesis reaction that reduces carbon dioxide and produces methanol in the presence of carbon dioxide and hydrogen. As the methanol synthesis catalyst, a known catalyst such as a copper zinc oxide catalyst is used.

And an electrode cage 45 formed of a conductive material having a mesh smaller than the particle diameter of the particulate catalyst 46. The electrode cage 45 includes: a bottomed dish-shaped outer electrode 45a containing a plurality of particulate catalysts 46, and a cylindrical center electrode 45b formed substantially at the center of the outer electrode 45a when viewed in the extending direction of the reaction cylinder 41.

One pole of the dc power supply 47 is connected to the outer electrode 45a, and the other pole is connected to the center electrode 45 b. In the presence of carbon dioxide and hydrogen, a current is passed between the outer electrode 45a and the center electrode 45b by the dc power supply 47, whereby the double bond of carbon dioxide is broken and the methanol synthesis reaction is further promoted.

H₂The injector 52 is provided in the reactor 4 so that the center electrode 45b surrounds the injection hole. Thereby, the slave H can be driven₂The hydrogen gas ejected from the injector 52 uniformly contacts the carbon dioxide introduced into the reaction chamber 48.

Next, a step of producing a synthesis gas containing methanol by the reactor 4 as described above will be described. First, the valve 43a is opened while the piston 42 is lowered from the top dead center to the bottom dead center, and the recovery gas is introduced into the reaction chamber 48. Thereafter, the piston 42 is raised from the bottom dead center to the top dead center while the

valves

43a and 44a are closed, thereby raising the pressure in the reaction chamber 48. At this time, while the piston 42 is rising from the bottom dead center to the top dead center, the current flows between the outer electrode 45a and the center electrode 45b by the dc power supply 47, and the current is supplied from H₂The injector 52 injects hydrogen gas, which is weighed so that the ratio of carbon dioxide to hydrogen gas in the reaction chamber 48 becomes a set ratio, into the reaction chamber 48. Thus, in the reaction chamber 48, a methanol synthesis reaction by carbon dioxide (see the following formula (1)), a reverse water-gas shift reaction (see the following formula (2)), and a methanol synthesis reaction by carbon monoxide (see the following formula (3)) are performed by the action of the methanol synthesis catalyst to produce methanol.

CO₂+3H₂→CH₃OH+H₂O(1)

CO₂+H₂→CO+H₂O(2)

CO+2H₂→CH₃OH(3)

Thereafter, the piston 42 is lowered from the top dead center to the bottom dead center in a state where the

valves

43a and 44a are closed, so that the methanol is separated from the methanol synthesis catalyst. Thereafter, the valve 44a is opened while the piston 42 is rising from the bottom dead center to the top dead center, whereby the synthesis gas containing methanol is pushed out from the reaction chamber 48 to the synthesis gas outlet 44.

Returning to fig. 1, the methanol recovery device 6 recovers methanol from the synthesis gas discharged from the reactor 4 and supplies it to the fuel tank 20. More specifically, the methanol recovery apparatus 6 includes a synthesis gas pipe 61, a condenser 62, a liquid-phase pipe 63, and a gas-phase pipe 64.

The synthesis gas pipe 61 is a pipe connecting the synthesis gas discharge port 44 and the condenser 62. The synthesis gas discharged from the synthesis gas discharge port 44 is introduced into the condenser 62 through the synthesis gas pipe 61.

The condenser 62 condenses the synthesis gas supplied from the synthesis gas pipe 61 by heat exchange, and thereby separates the synthesis gas into a liquid phase containing methanol as a main component and a gas phase containing unreacted carbon dioxide and nitrogen as main components.

The liquid-phase pipe 63 is a pipe connecting the liquid-phase discharge portion of the condenser 62 and the fuel tank 20. The liquid phase discharged from the condenser 62 is introduced into the fuel tank 20 through a liquid phase pipe 63. Thereby, the methanol generated by the reactor 4 is stored as the liquid hydrocarbon fuel in the fuel tank 20.

The gas-phase pipe 64 is a pipe connecting the gas-phase discharge portion of the condenser 62 and the exhaust pipe 16. More specifically, the gas-phase pipe 64 connects the gas-phase discharge part of the condenser 62 and the CO in the exhaust pipe 16₂A portion upstream of the recovery device 3 and downstream of the exhaust gas purification device 18. The gas phase discharged from the condenser 62 is introduced into CO through a gas phase pipe 64₂And a recovery device 3.

The flow of carbon in the vehicle V as described above will be described. First, if a mixture gas of the hydrocarbon fuel stored in the fuel tank 20 and the air introduced from the intake pipe 15 is combusted in the engine 1, exhaust gas containing nitrogen, carbon dioxide, and water as main components is discharged from the engine 1. Carbon dioxide in the exhaust gas passes through CO₂The recovery device 3 is recoveredAnd is supplied to the reactor 4. In reactor 4, a synthesis gas containing methanol is generated by the reaction of carbon dioxide and hydrogen. Methanol in the synthesis gas is recovered by the methanol recovery device 6 and stored as fuel in the fuel tank 20. In addition, the unreacted carbon dioxide contained in the synthesis gas is again CO-converted₂The recovering device 3 recovers and is supplied to the reactor 4. Thus, the vehicle V sucks carbon dioxide from the outside air and supplies carbon to the fuel tank 20, the engine 1, and the CO₂The recovery apparatus 3, the reactor 4, and the methanol recovery apparatus 6 are circulated, thereby reducing the amount of carbon dioxide discharged from the tail pipe to the outside of the vehicle.

According to the vehicle V of the present embodiment, the following effects are exhibited.

(1) The vehicle V includes: CO 2₂A recovery device 3 that recovers carbon dioxide from exhaust gas flowing through the exhaust pipe 16; high pressure H₂A tank 51 that stores hydrogen gas; a reactor 4 by passing CO₂Carbon dioxide recovered from exhaust gas by the recovery device 3 and high pressure H₂The hydrogen supplied from the tank 51 reacts to produce methanol while reducing carbon dioxide; and a fuel tank 20 for storing methanol generated in the reactor 4 as fuel. Therefore, according to the vehicle V, carbon dioxide generated by burning fuel in the engine 1 during traveling passes through CO₂The recovery device 3 recovers and converts into methanol in the reactor 4, and then stores as fuel in the fuel tank 20. In addition, the fuel stored in the fuel tank 20 can be supplied to the engine 1 again and converted into mechanical energy. As described above, according to the vehicle V, since the carbon dioxide generated by the combustion of the fuel in the engine 1 can be reused as the fuel for the engine 1, the amount of carbon dioxide discharged to the outside of the vehicle can be reduced as compared with the case where the carbon dioxide discharged from the engine 1 is directly discharged to the outside of the vehicle.

(2) Since the methanol formation reaction of carbon dioxide and hydrogen is an exothermic reaction, the temperature rises to an appropriate temperature by its own reaction heat. However, since the temperature is low at the time of start-up, it is necessary to supply heat energy from the outside at least in the initial stage to make the inside of the reaction chamber 48 of the reactor 4 high in temperature. In contrast, in the vehicle V, methanol can be generated from the initial stage by supplying a part of the heat energy obtained by burning the fuel in the engine 1 to the reactor 4. This enables methanol to be produced without affecting the fuel consumption of the vehicle V. In addition, according to the vehicle V, it is not necessary to provide a heater for heating the reactor 4, and therefore, the configuration of the vehicle V can be simplified.

(3) In order to react carbon dioxide with hydrogen to produce methanol, the reaction chamber 48 of the reactor 4 needs to be set at a high pressure. In contrast, in the vehicle V, the gas in the reactor 4 is compressed by a part of mechanical energy obtained by burning fuel in the engine 1. This enables methanol to be produced without affecting the fuel consumption of the vehicle V. In addition, according to the vehicle V, it is not necessary to provide a pump for compressing the gas in the reactor 4, and therefore, the structure of the vehicle V can be simplified.

(4) In the vehicle V, at least one of the cylinders of the multi-cylinder internal combustion engine is used as the reaction cylinder 41 of the reactor 4. According to the vehicle V, the thermal energy generated by burning the fuel in the other cylinders 11 to 13 can be supplied to the reaction chamber 48 of the reactor 4 by a simple structure, and the gas in the reaction chamber 48 can be compressed by the mechanical energy generated by burning the fuel in the other cylinders 11 to 13.

(5) In the vehicle V, the methanol-containing synthesis gas discharged from the reactor 4 is condensed by the condenser 62 to be separated into a gas phase and a liquid phase, wherein the methanol-containing liquid phase is supplied to the fuel tank 2, and the gas phase containing unreacted carbon dioxide and nitrogen is separated from CO₂The recovery device 3 is supplied to the upstream side. Thus, the unreacted carbon dioxide can be recovered by the recovery device and reused for the generation of methanol in the reactor 4, and therefore, the amount of carbon dioxide discharged to the outside of the vehicle can be further reduced.

The above description has been made of an embodiment of the present invention, but the present invention is not limited thereto. The detailed configuration may be changed as appropriate within the scope of the present invention.

For example, in the above embodiment, the case where a part of the engine 1 including the reaction cylinder 41 is used as the reactor 4 has been described, but the present invention is not limited thereto. The reactor and the engine may also be separate. Further, even when the reactor and the engine are separated from each other in this manner, it is preferable that a part of thermal energy obtained by burning the fuel in the engine is supplied to the reactor, and gas in the reaction chamber of the reactor is compressed by a part of mechanical energy obtained by burning the fuel in the engine.

List of reference numerals

V: vehicle with a steering wheel

1: engines (internal combustion engine, multi-cylinder internal combustion engine)

11. 12, 13, 41: cylinder

15: air suction pipe

16: exhaust pipes (exhaust channel)

2: fuel supply device

20: fuel tank

3： CO₂Recovery device (recovery device)

4: reactor with a reactor shell

41: reaction cylinder

42: piston

43： CO₂Suction inlet

44: synthetic gas outlet

5: hydrogen supply device (Hydrogen supply source)

51: high pressure H₂Box

6: methanol recovery device

61: synthetic gas piping

62: condenser

63: liquid phase piping

64: gas phase piping

Claims

1. A vehicle provided with an internal combustion engine that converts thermal energy generated by burning fuel into mechanical energy, the vehicle comprising:

a recovery device that recovers carbon dioxide from exhaust gas flowing through an exhaust passage of the internal combustion engine;

a hydrogen supply source that stores or generates hydrogen;

a reactor for generating methanol by reacting the carbon dioxide recovered by the recovery device with hydrogen supplied from the hydrogen supply source; and a process for the preparation of a coating,

and a fuel tank for storing the methanol produced by the reactor as a fuel.

2. The vehicle according to claim 1, wherein a part of heat energy obtained by combusting fuel in the internal combustion engine is supplied to the reactor.

3. The vehicle of claim 1, wherein the gas in the reactor is compressed by a portion of mechanical energy obtained by combusting fuel in the internal combustion engine.

4. The vehicle of claim 2, wherein the gas in the reactor is compressed by a portion of mechanical energy obtained by combusting fuel in the internal combustion engine.

5. The vehicle according to claim 1, wherein the internal combustion engine is a multi-cylinder internal combustion engine having a plurality of cylinders,

the reaction cylinder of the reactor is at least one of the plurality of cylinders.

6. The vehicle according to any one of claims 1 to 5, characterized by being provided with a condenser for condensing and separating the methanol-containing synthesis gas discharged from the reactor into a gas phase and a liquid phase,

the liquid phase separated by the condenser is supplied to the fuel tank,

the gas phase separated by the condenser is supplied to the upstream side of the recovery device in the exhaust passage.