KR102293312B1 - Methane pyrolysis solar rotary reactor and method for producing hydrogen and carbon black using the same - Google Patents

Abstract

The present invention relates to a methane pyrolysis solar thermal rotary reactor and a method for producing hydrogen and/or carbon black using the same. The methane pyrolysis solar thermal rotational reactor according to the present invention is a rotational reactor centered on an axis rotatable by a motor, in which the solar heat collected by the solar thermal collector is vertically incident on the cylindrical reactor wall surface, and the steam injector a gas-liquid spray nozzle (gas-liquid atomizing nozzle) containing CH ₄ CH ₄ and H ₂ O injection assembly to inject the gas and water; and a reaction unit having a porous reaction bed through which a carbon particle fluid can flow through the pores connected to each other _{and decomposing CH 4} provided from the injection unit by the concentrated solar heat into hydrogen gas and carbon black However, _{after the steam provided from the CH 4} and H ₂ O injection unit is heated by the solar heat concentrated in the reaction unit, the porous reaction layer is coated and dispersed between the carbon particle fluids to suppress carbon deposition in the porous reaction layer. It is characterized by

Description

Methane pyrolysis solar rotary reactor and method for producing hydrogen and carbon black using the same

The present invention relates to a methane pyrolysis solar thermal rotary reactor and a method for producing hydrogen and/or carbon black using the same.

Emissions of greenhouse gases, particularly methane and carbon dioxide, are causing global climate change. In particular, the generation of methane is increasing due to the use of fossil fuels, the discharge of waste from landfills, the livestock industry, and the increase in biomass. Methane is emitted into the atmosphere in an effective amount of 370 million tons per year (as of 2010) worldwide and has a greenhouse gas effect that is 21 times more effective than carbon dioxide at the same concentration. do.

Since methane has the largest hydrogen-to-carbon ratio among hydrocarbon substances, it has the advantage of being cleaner than other hydrogen-producing raw materials. Methane utilization technology can be applied to city gas, power generation, automobile fuel, methanol liquid fuel, and hydrogen production fields. It is based on captured and purified methane, and if a technology for direct conversion of low-concentration unused methane is developed in the future, the market size can be further expanded.

Hydrogen is the lightest and most abundant element, with infinite resources and clean energy. Hydrogen production technology is broadly classified into three categories. First, methods based on hydrocarbon substances such as methane steam reforming, partial oxidation of heavy oil, and catalytic cracking of natural gas, second, methods based on non-hydrocarbons such as thermochemical and electrochemical water cracking, third, the above two methods There are forms that combine forms. Among them, the method of producing hydrogen from natural gas has a problem of generating a large amount of carbon dioxide during hydrogen production.

Carbon black is used as an additive in rubber, plastics, paints and inks, and has the effect of changing mechanical, electrical and optical properties into desired properties. In particular, carbon black has the ability to strengthen rubber, so it is also used to reinforce rubber products such as tires and industrial hoses. In addition, carbon black may be used as a high value-added material such as a secondary battery electrode material, a catalyst carrier, and the like. Usually, it is manufactured by separating carbon particles from black smoke generated from incomplete combustion of heavy oil, and on average, 2.4 tons of carbon dioxide is emitted per ton of carbon black. The steam methane reforming process emits about 8 tonnes of carbon dioxide per ton of hydrogen.

As one of the methods for solving these environmental problems, the thermal decomposition of methane gas is _{a technology of decomposing CH 4} at a high temperature to convert it into hydrogen and carbon. The biggest advantage of methane gas pyrolysis is to produce hydrogen and carbon without generating carbon dioxide. Compared with the existing hydrogen production technology, it has the advantage of being able to produce hydrogen in large quantities and at the same time utilize high-purity carbon emitted as a by-product. In addition, hydrogen produced by methane gas pyrolysis can be used as fuel for internal combustion engines by reacting with carbon dioxide recovered from a carbon dioxide source, and can be effectively linked to a technology for producing methanol, and used as a hydrogen source for fuel cells, a clean power generation technology It has the advantage of being able to

Meanwhile, carbon dioxide reforming of methane in nickel, noble metal and mixed oxide-based catalysts, also known as dry reforming of methane, _{can effectively convert greenhouse gas CO 2} into useful chemicals. When the nickel catalyst is exposed to high temperature, the catalytic activity is reduced by sintering the metal. Accordingly, carbonaceous catalysts having advantages such as low cost, high temperature resistance and sulfur-free toxicity are attracting attention as replacements for metal-based catalysts.

On the other hand, methane requires a high-temperature heat source to convert it into a very safe chemical, and at this time, a new renewable energy source is needed in terms of reducing greenhouse gas. Solar energy technology is a technology that absorbs radiant energy from the sun and converts it into thermal energy. Therefore, the high value-added resource conversion technology of methane using new and renewable energy sources is a technology that can solve global warming and a greenhouse gas resource conversion technology.

However, when hydrogen and carbon are generated from methane using the methane gas high-temperature pyrolysis method, pyrocarbon is generated on the inner wall of the reaction tube, and a plugging phenomenon occurs in which carbon is deposited thereon.

In order to efficiently use solar heat, a natural energy, it is necessary to lower the reaction temperature through a catalytic reaction during methane decomposition. Although the reaction temperature can be lowered to 1400 to 1500 K when the catalyst is introduced, it is reported that the catalyst is easily deactivated due to the deposition of carbon generated during methane decomposition on the catalyst surface. It is reported that, when the carbon-based catalyst is introduced, the initial methane conversion rate is maintained at over 90% at the reaction temperature of 1473K, and the conversion rate is rapidly reduced to 45% as in the non-catalytic reaction within 1500 seconds of the reaction time. Therefore, it is necessary to develop a high conversion catalyst and reaction system that is resistant to carbon precipitation at a low reaction temperature of 1400 to 1500 K.

The present invention collects sunlight to raise the temperature inside the rotary reactor to 1000 degrees and rotates the reactor at a constant speed using a rotary motor to make the inside temperature of the reactor constant. It is possible to solve the catalyst bed crack problem, increase catalyst life and efficiency, and increase pressurization and operation convenience by gas flow. Here, by injecting biogas (main component CH ₄ ), carbon black (C) and hydrogen (H ₂ ) are injected into the reactor, and water is injected with biogas through a steam injector equipped with an atomizing nozzle. It is intended to suppress carbon deposition in the methane pyrolysis porous reaction layer and/or catalyst layer by spraying with steam.

A first aspect of the present invention is a cylindrical methane pyrolysis solar thermal rotary reactor centered on an axis rotatable by a motor, wherein solar heat collected by a solar collector is vertically incident on a cylindrical reactor wall surface, and a steam injector a gas-liquid spray nozzle (gas-liquid atomizing nozzle) containing CH ₄ CH ₄ and H ₂ O injection assembly to inject the gas and water; and a reaction unit having a porous reaction bed through which a carbon particle fluid can flow through the pores connected to each other _{and decomposing CH 4} provided from the injection unit by the concentrated solar heat into hydrogen gas and carbon black However, _{after the steam provided from the CH 4} and H ₂ O injection unit is heated by the solar heat concentrated in the reaction unit, the porous reaction layer is coated and dispersed between the carbon particle fluids to suppress carbon deposition in the porous reaction layer. To provide a rotary reactor.

_{A second aspect of the present invention is a first step of injecting CH 4} containing gas and water into a steam injector equipped with a gas-liquid atomizing nozzle; and a second step of thermally decomposing methane while spraying _{CH 4} and steam through the steam injector to a porous reaction bed that decomposes methane into hydrogen gas and carbon black by the concentrated solar heat, steam A method for producing hydrogen, carbon black, or both, in which steam injected from an injector is heated by concentrated solar heat, and then the porous reaction layer is coated and dispersed between the carbon particle fluids to suppress carbon deposition in the porous reaction layer As such, the porous reaction layer surrounds the inner wall of the cylindrical reactor, and the reactor is rotated at a speed of 1 to 100 RPM by a motor to control the internal temperature of the reactor.

Hereinafter, the present invention will be described in detail.

When methane is heated to a high temperature (1170 - 1620K), methane (CH ₄ ) is decomposed as shown in Scheme 1 below.

[Scheme 1]

CH ₄ → C + 2H ₂ ΔH ^o = 74.6 kJ/mol

The direct decomposition of methane does not generate carbon dioxide at all, and is a major advantage in that it produces hydrogen as a major product and obtains high-purity carbon as a by-product. Carbon can be stored for future use, used as a high value-added material such as an electrode, catalyst, carrier, etc. of a secondary battery, or as a rubber and electrical additive.

Biomethane energy conversion technology using natural energy is shown in Scheme 2 below.

[Scheme 2]

CH ₄ + CO ₂ → 2H ₂ + 2CO, ΔH ^o = 247 kJ/mol

Biogas contains methane (~50%) and carbon dioxide (~50%), where CO ₂ lowers the calorific value.

In the case of Reaction Equation 2, in which biomethane and CO ₂ are simultaneously supplied and reformed, an additional power generation effect of 247 kJ per 1 mol _{of CH 4 due to the} production of high value-added synthesis gas compared to the methane calorific value (-74.6 kJ/mol) of the existing biomethane power generation system is expected

In the case of Scheme 1, in which biomethane and CO ₂ are separated and pure methane is pyrolyzed, 277 MJ of energy per 1 kg of hydrogen production is saved and 14 kg of CO ₂ emission is avoided compared to the existing steam methane reforming process.

In order to increase the conversion rate of methane during thermal decomposition of methane, it is advantageous at high temperature and low pressure, and the reaction is endothermic.

Theoretically, the equilibrium composition of hydrogen reaches more than 97% at a reaction temperature of about 1070K under atmospheric conditions.

Although pyrolysis of methane is possible without a catalyst, the pyrolysis reaction temperature can be lowered when a catalyst is used. The catalyst is generally Ni-Mo/Alumina, and some catalysts are very good in performance tests, and the conversion rate is known to be almost 100%.

The present invention is a cylindrical methane pyrolysis solar thermal rotary reactor centered on a shaft rotatable by a motor (Fig. 2). A quartz window is required for cracking the catalyst layer due to high pressure of the conventional reactor having a fixed catalyst layer and for transmitting sunlight separately. It is also possible to solve the problem of window breakage due to high pressure and methane reaction and coating on the window surface, thereby reducing the sunlight transmittance of the window. The rotary reactor is made of SUS metal and may additionally include Inconel, but is not limited thereto.

In the rotary reactor of the present invention, the solar heat collected by the solar heat collector is vertically incident on the wall of the cylindrical reactor.

Methane pyrolysis solar thermal reactor according to the present invention is a gas-liquid atomizing nozzle (gas-liquid atomizing nozzle) is equipped with a steam injector (steam injector) installed CH ₄ and H ₂ O injection unit; _{and a reaction unit for decomposing CH 4} into hydrogen gas and carbon black by the concentrated solar heat.

The reactor rotation speed by the motor (FIG. 2) of the present invention may be 1 to 100 RPM. If it is less than 1 RPM, the rotation speed is slow and the concentrated sunlight is intensively irradiated to a specific location of the reactor, so there may be a problem that the reactor is corroded. There may be problems with slowing down.

A vertical cross-sectional view of one embodiment of the methane pyrolysis solar thermal reactor of the present invention is as shown in FIG. 3 . The methane pyrolysis solar thermal reactor of the present invention may have a methane conversion rate of 80% or more.

According to the present invention, _{the reaction unit for decomposing CH 4} into hydrogen gas and carbon black by the concentrated solar heat includes a porous reaction bed through which a carbon particle fluid can flow through pores connected to each other. In the present invention, the porous reactive layer may be a catalyst-free porous layer or a catalyst-applied porous layer. As a non-limiting example, the porous reactive layer may be a Ceria coated zirconia foam device. In addition, the porous reaction layer can exhibit a uniform temperature gradient.

Since the porous reaction layer may be capable of receiving the light collecting solar heat and CH ₄ containing reaction vessel form, can be CH _4, steam-containing fluid injected through the steam injector in the internal space thereof can be solar power is converged, CH ₄ and the steam containing fluid can be heated by concentrated solar heat up to or above the methane pyrolysis temperature. Due to this, methane may be thermally decomposed and/or steam reformed into hydrogen gas and carbon black in the porous reaction layer.

The main gaseous products of methane pyrolysis are H ₂ , C ₂ H ₆ , C ₂ H ₄ , C ₂ H ₂ and C ₃ H ₆ . Coke refers to hydrocarbon material and/or pyrocarbon produced during methane pyrolysis, and coke is deposited on the reactor wall as a gas phase during pyrolysis.

Therefore, the pyrolysis reaction of hydrogen gas and methane to produce carbon black particles causes carbon deposition in the pores and/or catalyst of the porous reaction layer, so that the pores are closed and/or most catalysts are activated by carbon deposition. This lowers the catalyst life, there is a disadvantage.

As the amount of inflow methane increases, the hydrogen production continues to increase, but as the flow rate of methane increases, the amount of carbon produced increases, resulting in the reactor clogging faster than when the flow rate is low. That is, a large amount of pyrocarbon is formed on the wall of the reactor by the surface reaction rather than the volume reaction, which causes the reactor to clog. Therefore, in order to mass-produce methane gas by high-temperature thermal decomposition, it is necessary to develop a reactor capable of effectively preventing the surface reaction.

To this end, the methane pyrolysis solar thermal reactor that heats the temperature of the porous reaction layer above the methane pyrolysis temperature through the concentrated solar heat according to the present invention is a steam injector equipped with a gas-liquid atomizing nozzle. the CH ₄ as well as steam (steam) to the liquid injecting H ₂ O into the porous reaction layer, and by the focused solar CH ₄ is thermally decomposed and the steam droplets heated then been heated steam solution coating the porous reaction layer through It is characterized in that it is dispersed between the carbon particle fluid and suppresses carbon deposition in the porous reaction layer.

_{The CH 4} and H ₂ O injection unit of the present invention may be connected to the gas-liquid spray nozzle of the steam injector by the CH ₄ containing gas injection unit and the water injection unit ( FIG. 5 ).

In the present invention, CH ₄ and H ₂ O injection unit has a structure of a steam injector, and water may be sprayed as steam by a _{CH 4 containing gas through a gas-liquid spray nozzle (FIG. 5).} In this case, the CH ₄ containing gas may be a compressed gas.

In the present invention, the steam injector is a device capable of generating steam in-situ, and is equipped with a gas-liquid atomizing nozzle, commonly known as a liquid air atomizing nozzle (FIG. 4). In the steam injector of the present invention, the same principle of operation as the liquid air atomizing nozzle (FIG. 5) is applied, and CH ₄ containing gas is used instead of air as liquid. Therefore, the liquid air atomizing nozzle can be used as it is or by changing the design, and can be used as the gas-liquid atomizing nozzle in the steam injector of the present invention.

A gas-liquid spray nozzle may provide atomized spray using the collision of gas and liquid (FIG. 5). A gas-liquid spray nozzle, which corresponds to an air atomizing assembly, can use compressed gas to transport the fluid and atomize the sprayed fluid to provide the best droplet size. By changing the design of the gas-liquid spray nozzle, it is possible to finely atomize the liquid by mixing it with the gas in a specific spray and flow pattern. For example, according to the design of the nozzle cap as exemplified in FIG. 6 , a fine spray spray, mist or mist may be formed, and various spray patterns are possible. Also, various gas and liquid mixing types are possible. Accordingly, the present invention can fine-tune the flow rate, drop size, spray distribution and coverage of steam together with the _{CH 4} containing gas through the gas-liquid spray nozzle.

When CH ₄ containing gas and water are injected into the gas-liquid spray nozzle, _{steam droplets are dispersed in the CH 4} containing carrier gas while generating water in-situ as steam and sprayed on the porous reaction layer, and heated by the concentrated solar heat. Subsequently, CH ₄ is pyrolyzed to form hydrogen gas and carbon particles, and high-temperature steam having a flow rate coats the porous reaction layer and disperses between the carbon particle fluids to form coke in the pores of the porous reaction layer and carbon deposition ( carbon deposition) or eliminate carbon deposition.

Accordingly, the present invention CH ₄ and by controlling the water amount to be injected into the H ₂ O injection assembly, CH ₄ and H ₂ O injection assembly porous reaction layer after the steam (steam) is heated by the focused solar heat provided by the It can be coated and dispersed between the carbon particle fluid to inhibit carbon deposition in the porous reactive layer.

_{The CH 4} containing gas and the steam containing fluid injected through the steam injector are supplied as a reactant to the porous reaction layer while exerting a swirl effect in a clockwise or counterclockwise direction, thereby causing a turbulent flow. It can increase heat transfer.

_{In the present invention, CH 4} containing gas and steam are supplied as reactants to the porous reaction layer through a steam injector to suppress Coke formation and minimize carbon deposition in the pores of the porous reaction layer.

In the present invention, CH ₄ may be supplied from natural gas or biomethane. For example, the CH ₄ containing gas may be natural gas or biogas. Biogas is produced by anaerobic digestion of organic matter, and CHO components contained in organic matter are converted into a gas mainly composed _{of CH 4} and CO _{2 .} Accordingly, in the present invention, the CH ₄ containing gas may further include _{CO 2 .}

Although not shown in the drawings, a carbon particle collecting unit may be provided at a lower end of the reaction unit having a porous reaction layer to separate carbon particles and hydrogen-containing product gas through a filter.

In addition, the method for producing hydrogen and/or carbon black according to the present invention is

_{A first step of injecting CH 4} containing gas and water into a steam injector equipped with a gas-liquid atomizing nozzle; and

and a second step of thermally decomposing methane while injecting _{CH 4} and steam through the steam injector into a porous reaction bed that decomposes methane into hydrogen gas and carbon black by the concentrated solar heat.

The steps may be carried out in the methane pyrolysis solar reactor of the present invention described above.

At this time, after the steam injected from the steam injector is heated by the concentrated solar heat, the porous reaction layer is coated and dispersed between the carbon particle fluid, so that carbon deposition in the porous reaction layer can be suppressed.

If the method and apparatus of the present invention are used in landfills of various sizes, including domestic waste landfills, methane in the landfill can be treated and thus not only reduce greenhouse gas, but also secure new and renewable energy, produce waste energy, and secure large-capacity emission rights. and carbon dioxide reduction.

Although large-capacity hydrogen production technology is being developed, the technology for producing hydrogen through reforming or gasification of fossil fuels has a disadvantage in that it emits a large amount of carbon dioxide due to high energy consumption. On the other hand, in the present invention, hydrogen is produced using solar energy, which is natural energy, and since biogas is used as a supply gas to be used, hydrogen can be economically produced while reducing greenhouse gas.

In addition, by using the method and apparatus of the present invention, the temperature inside the cylindrical reactor can be constantly controlled, and cracking of the catalyst layer due to high pressure can be prevented, thereby improving the life and efficiency of the catalyst layer.

In addition, _{by using a steam injector equipped with a gas-liquid spray nozzle as the CH 4} and H ₂ O injection part, it is possible to suppress Coke formation and minimize carbon deposition in the methane pyrolysis solar thermal reactor.

1 is an example of a solar collector that can be linked to the methane pyrolysis solar thermal reactor of the present invention.
2 is a design diagram of a rotary motor according to an embodiment of the present invention.
3 is a design diagram of a methane pyrolysis solar thermal rotary reactor according to an embodiment of the present invention.
4 is a view showing an internal structure of a steam injector equipped with a liquid air atomizing nozzle.
FIG. 5 illustrates an operating principle in _{which CH 4} containing gas and water injected into the steam injector are injected into _{CH 4 and steam.}
6 is a photograph illustrating various Caps of Air Atomizing Nozzles on the market.

BRIEF DESCRIPTION OF THE DRAWINGS A typical embodiment of the present invention is described with reference to the accompanying drawings. These examples are only for illustrating the present invention in more detail, and the scope of the present invention is not limited by these examples.

An example of a solar collector that can be linked to the methane pyrolysis solar thermal reactor of the present invention is shown in FIG. 1, a description thereof is described in Korean Patent Registration No. 10-1008500, which is incorporated herein (FIG. 1) .

A design diagram of a methane pyrolysis solar thermal rotary reactor according to an embodiment of the present invention is shown in FIG. 3 . The reactor is rotated about a rotatable axis 7 by means of a motor ( FIG. 2 ). The reactor rotation speed by the motor may be adjusted to 1 to 100 RPM in consideration of temperature control and corrosion (FIG. 3).

The rotary motor according to an embodiment includes a seal 2 and a shaft 4 for a rotary shaft, a bearing 3 is provided to support rotation of the shaft, and the bearing is a center of the rotary motor frame body. located (Fig. 2).

It can be controlled so that the temperature inside the reactor is constantly maintained in the range of 1100K to 1700K, which is the temperature at which the methane pyrolysis reaction occurs, while the solar heat collected by the solar collector is vertically incident on the wall of the rotating cylindrical reactor. A porous reaction layer 8 in the form of a vessel is positioned inside the reactor. For example, the porous reaction layer may be an integrally hollow cylindrical shape. Thus, the vertical cross-section of the porous reactive layer with respect to the longitudinal axis may be rectangular ( FIG. 3 ).

In one embodiment, a steam injector 10 may be located in the reactor ( FIGS. 4 and 5 ). _{Specifically, the CH 4} containing gas and steam injection outlet of the steam injector 10 in order to supply the CH 4 containing gas and steam to the porous reaction layer 8 is adjacent to the inner wall of the porous reaction layer 8 into which the reactant enters. positioned to supply steam into the inner wall and pores of the porous reaction layer 8 . After _{the steam provided from the CH 4} and H ₂ O injection unit is heated by the solar heat concentrated in the reaction unit, the porous reaction layer is coated and dispersed among the carbon particle fluid to suppress carbon deposition in the porous reaction layer. . Due to this, the carbon particle fluid can flow through the pores connected to each other in the porous reaction bed, so that it can be discharged from the inner surface of the reaction bed to the outer surface, and deactivation by carbon deposition of the catalyst layer can be prevented. That is, the high-temperature, high-speed steam droplets discharged from the steam injector 10 suppress carbon deposition in the porous reaction layer or remove carbon deposition, thereby preventing deterioration of catalyst activity and smoothly maintaining gas flow.

In the present invention, since the reactants are supplied to the porous reaction layer 8 by _{CH 4} containing gas and steam (H ₂ O) through the steam injector 10, additional hydrogen production by steam reforming side reaction can produce more hydrogen.

The methane pyrolysis solar thermal reactor of the present invention is a cylindrical reactor, and a porous reaction layer 8 is optionally located therein, and the porous reaction layer and the inner wall of the reactor are spaced apart from each other to collect product gas including carbon particles and discharge part 9 The methane pyrolysis can be discharged out of the solar thermal reactor. A gas outlet 9 can be connected to the reactor downstream of the porous reaction bed.

In the present invention, a steam injector 10 equipped with a gas-liquid spray nozzle is connected to the reactor, and each steam injector is supplied with gas and water through an inlet line 11 . One or a plurality of steam injectors 10 may be provided, but the number is not limited thereto.

_{When CH 4} and the steam-containing fluid are injected into the porous reaction layer 8 through the steam injector 10 _{( FIGS. 4 and 5 ), the CH 4} and the steam-containing fluid injected from the inner space of the porous reaction layer 8 are condensed The methane is heated above the pyrolysis temperature of methane by solar heat, which can cause pyrolysis and/or steam reforming reaction of methane into hydrogen gas and carbon black. The products of the pyrolysis and/or steam reforming reaction of methane escape out of the porous reaction layer via the porous foam of the porous reaction layer. The product passing through the porous reaction layer as described above is collected toward the bottom of the reactor and discharged through the discharge unit 9 .

Although not shown in the drawings, a carbon particle collecting unit may be provided at a lower end of the reaction unit having a porous reaction layer to separate carbon particles and hydrogen-containing product gas through a filter.

In order to separate carbon particles and gas products, which are the main products of methane pyrolysis, the methane pyrolysis solar thermal rotary reactor may further include a carbon particle collecting unit connected to an outlet port, and a filter for separating carbon particles and gas is provided. It may be composed of a carbon trap provided and optionally a cyclone at the rear end thereof.

The carbon collector can be made of a transparent Pyrex material so that the presence and amount of carbon particles can be visually checked. Most of the carbon particles generated during methane pyrolysis are primarily captured by the carbon particle collector, and the fine carbon particles that are not captured by the carbon particle collector and come out with the gas can be completely captured in the cyclone. The substances discharged from the carbon particle collecting unit are hydrogen gas and unreacted methane gas.

In the gas discharge unit 9, the exhaust gas from which carbon particles are completely removed while passing through the carbon particle collector and the cyclone may be discharged to the outside after the flow rate is accumulated in the dry gas meter.

In this specification, the detailed description of the contents that can be sufficiently recognized and inferred by those of ordinary skill in the technical field of the present application is omitted, and the technical idea or essential configuration of the present application is changed in addition to the specific examples described in the present specification More various modifications are possible within the scope not to do so. Accordingly, the present application may be practiced in a manner different from that specifically described and exemplified in the present specification, which can be understood by those of ordinary skill in the art of the present application.

1. Spring
2. SEAL RING
3. Bearing
4. Shaft
5. Cover
6. body
7. Rotation shaft
8. Porous Reaction Layer
9. Discharge part
10.Steam Injector
11. Inlet line

Claims (11)

A cylindrical methane pyrolysis solar rotary reactor centered on an axis rotatable by a motor, comprising:
The solar heat condensed by the solar concentrator is vertically incident on the cylindrical reactor wall without a window for sunlight transmission,
The rotary reactor rotates at a rotation speed of 1 RPM to 100 RPM,
_{CH 4} and H ₂ O _{injection unit for injecting CH 4} containing gas and water to the gas-liquid atomizing nozzle of the steam injector; and a reaction unit having a porous reaction bed through which a carbon particle fluid can flow through the pores connected to each other _{and decomposing CH 4} provided from the injection unit by the concentrated solar heat into hydrogen gas and carbon black provided, but
After _{the steam provided from the CH 4} and H ₂ O injection unit is heated by the solar heat concentrated in the reaction unit, the porous reaction layer is coated and dispersed among the carbon particle fluid to suppress carbon deposition in the porous reaction layer. , a rotary reactor. According to claim 1,
The rotational speed of the reactor by the motor is 1 to 100 RPM of the rotary reactor. According to claim 1,
The CH ₄ containing gas is a rotary reactor that further _{comprises CO 2 .} According to claim 1,
The CH ₄ containing gas is a rotary reactor that is produced by anaerobic digestion of organic matter, CH ₄ and CO ₂ containing biogas. According to claim 1,
A rotary reactor further comprising a carbon particle collecting unit for separating carbon particles and gas through a filter at a lower end of the reaction unit having the porous reaction layer. According to claim 1,
The porous reaction layer is a rotary reactor of a cylindrical shape. According to claim 1,
The porous reaction layer is a porous layer without a catalyst or a porous layer to which a catalyst is applied. According to claim 1,
A rotary reactor that heats the temperature of the porous reaction layer above the methane pyrolysis temperature through the concentrated solar heat. According to claim 1,
From the CH ₄ and H ₂ O injection _{unit, CH 4} and steam are provided to the reaction unit, heated through concentrated solar heat, and further hydrogen is produced through a steam reforming side reaction in the porous reaction layer. _{A first step of injecting CH 4} containing gas and water into a steam injector equipped with a gas-liquid atomizing nozzle; and
A second step of thermally decomposing methane while spraying _{CH 4} and steam through the steam injector to a porous reaction bed that decomposes methane into hydrogen gas and carbon black by the concentrated solar heat,
After the steam injected from the steam injector is heated by the concentrated solar heat, the porous reaction layer is coated and dispersed between the carbon particle fluids to suppress carbon deposition in the porous reaction layer To produce hydrogen, carbon black, or both As a method,
The porous reaction layer surrounds the inner wall of the cylindrical reactor and controls the internal temperature of the reactor while the reactor is rotated at a speed of 1 to 100 RPM by a motor,
Concentrated solar heat is provided inside the reactor without a window for sunlight transmission to heat the steam. ◈Claim 11 was abandoned when paying the registration fee.◈ 11. A process for producing hydrogen, carbon black or both according to claim 10, wherein the methane pyrolysis solar reactor according to any one of claims 1 to 9 is used.

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