Ammonia decomposition system, and ammonia decomposition method

Abstract

To provide an ammonia decomposition system by which improved decomposition efficiency is provided.SOLUTION: An ammonia decomposition system according to an embodiment of the present disclosure comprises: a cracker for generating hydrogen by decomposing ammonia; a heating part for heating the cracker; a fuel battery for feeding power inside the battery by reacting the hydrogen; a bypass line for connecting a pipeline of connecting the cracker with the fuel battery, and another pipeline of connecting the fuel battery with the heating part; a sensing part for sensing temperature inside the cracker; and a control part for receiving temperature information inside the cracker from the sensing part. The control part that receives remaining ammonia information inside the cracker controls an operation of the bypass line based on at least one of the temperature information and the remaining ammonia information.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to an ammonia decomposition system and method. [Background technology]

[0002] In a mobile environment such as a ship or a dump truck, load fluctuations can occur frequently. This can result in a decrease in the ammonia decomposition rate if the feedback logic of the ammonia decomposition reaction in a plant environment such as a chemical plant is applied to a mobile environment as is.

[0003] In particular, during load-following operating conditions such as rapid acceleration and deceleration in ships and dump trucks, the ammonia decomposition reaction in a plant-scale environment may not be easily controlled, which can lead to overall system power loss and reduced battery performance.

[0004] The process of decomposing ammonia to produce hydrogen is an endothermic reaction that requires a lot of heat. When a large amount of ammonia flows in during load following in a ship or dump truck environment, the temperature inside the cracker drops rapidly, and an endothermic reaction can occur at a relatively low temperature. This can result in a low hydrogen conversion rate and an increase in the amount of residual ammonia due to incomplete reactions. Summary of the Invention [Problem to be solved by the invention]

[0005] According to embodiments of the present disclosure, an ammonia decomposition system is provided that provides improved decomposition efficiency.

[0006] According to embodiments of the present disclosure, an ammonia decomposition method is provided that provides improved decomposition efficiency.

[0007] By utilizing the ammonia decomposition system and the ammonia decomposition method according to the embodiments of the present disclosure, an environmentally friendly system capable of producing clean energy can be realized. [Means for solving the problem]

[0008] An ammonia decomposition system according to an embodiment of the present disclosure includes a cracker that decomposes ammonia to generate hydrogen, a heating unit that heats the cracker, a fuel cell that reacts the hydrogen to supply power to a battery, a pipe that connects the cracker and the fuel cell, and a bypass line that connects the pipe that connects the fuel cell and the heating unit, a sensing unit that senses the temperature inside the cracker, and a control unit that receives temperature information inside the cracker from the sensing unit. The control unit receives information about residual ammonia inside the cracker and controls the operation of the bypass line based on at least one of the temperature information and the residual ammonia information.

[0009] In some embodiments, the bypass line may include a hydrogen supply pipe and a bypass valve for adjusting a hydrogen flow rate of the hydrogen supply pipe. The controller may control the operation of the bypass line by opening the bypass valve when the temperature inside the cracker is lower than a preset temperature.

[0010] In some embodiments, the ammonia decomposition system may further include an absorption section that absorbs residual ammonia discharged from the cracker. The absorption section may be located between a discharge pipe of the cracker and an absorption pipe of the fuel cell. The discharge pipe of the cracker may be provided at the absorption pipe of the absorption section, and the absorption pipe of the fuel cell may be provided at the discharge pipe of the absorption section. The bypass line may connect the discharge pipe of the cracker or the absorption pipe of the absorption section to the discharge pipe of the fuel cell, or may connect the discharge pipe of the absorption section or the absorption pipe of the fuel cell to the discharge pipe of the fuel cell.

[0011] In some embodiments, the controller may be configured to open the bypass valve and control operation of the bypass line when residual ammonia within the cracker is equal to or greater than a preset amount.

[0012] In some embodiments, the ammonia decomposition system may further include a separation membrane that allows permeation of the hydrogen and nitrogen from the hydrogen, nitrogen, and residual ammonia discharged from the discharge piping of the cracker.

[0013] In some embodiments, the ammonia decomposition system may further include a first valve for adjusting the flow rate of ammonia entering from an absorption line of the cracker, and a second valve for adjusting the flow rates of hydrogen, nitrogen, and residual ammonia exiting from an exhaust line of the cracker.

[0014] In some embodiments, the control unit can be configured to close at least one of the first valve and the second valve and control the pressure and heating temperature inside the cracker when the residual ammonia inside the cracker is equal to or greater than a preset amount.

[0015] In some embodiments, the ammonia decomposition system may further include a pressurizing unit that adjusts the pressure inside the cracker.

[0016] In some embodiments, the control unit may be configured to increase the pressure inside the cracker by the pressurizing unit when the residual ammonia inside the cracker is equal to or greater than a preset amount.

[0017] In an ammonia decomposition method according to an embodiment of the present disclosure, temperature information inside a cracker that decomposes ammonia to generate hydrogen is received from a sensing unit that senses the internal temperature of the cracker. Residual ammonia information inside the cracker is received. Based on at least one of the temperature information and the residual ammonia information, operation of a bypass line that connects a pipe that connects the cracker and a fuel cell, and a pipe that connects the fuel cell and a heating unit is controlled. Effect of the Invention

[0018] According to the above-described embodiments of the present disclosure, the ammonia decomposition system includes a bypass line between the cracker and the absorber or between the absorber and the fuel cell, and the operation of the bypass line can be controlled based on the temperature and the amount of residual ammonia in the cracker.

[0019] According to an exemplary embodiment, the ammonia decomposition system can utilize a valve in the bypass line, a valve in the absorption or exhaust piping of the cracker, a separation membrane adjacent to the exhaust piping of the cracker, etc. to promote the ammonia decomposition reaction in the cracker.

[0020] The effects of the present disclosure are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic block diagram of an ammonia decomposition system according to an exemplary embodiment. [Diagram 2] FIG. 2 is a schematic block diagram illustrating a configuration of an ammonia decomposition system according to an exemplary embodiment. [Diagram 3] FIG. 3 is a schematic flow chart illustrating a method for ammonia decomposition under load following conditions with a bypass line according to an exemplary embodiment. [Figure 4]FIG. 4 is a flow chart illustrating a method for ammonia decomposition under load following conditions with a bypass line according to an exemplary embodiment. [Figure 5a] FIG. 5a is a block diagram illustrating an exemplary repositioning of a bypass line. [Figure 5b] FIG. 5b is a block diagram illustrating an exemplary repositioning of the bypass line. [Figure 6] FIG. 6 is a block diagram of an ammonia decomposition system including a separation membrane according to an exemplary embodiment. [Figure 7] FIG. 7 is a block diagram of a valvable ammonia decomposition system according to an exemplary embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] The same reference numerals refer to the same components throughout this disclosure. This disclosure does not describe all elements of the embodiments, and general content in the technical field to which the disclosure belongs or content that is duplicated in the embodiments will be omitted. The term "part, module, member, block" used in the specification can be embodied in software or hardware, and depending on the embodiment, multiple "parts, modules, members, blocks" may be embodied as one component, or one "part, module, member, block" may include multiple components.

[0023] Throughout the specification, when a part is referred to as being "coupled" to another part, this includes not only direct coupling but also indirect coupling, including coupling via a wireless communication network.

[0024] Furthermore, unless otherwise specified, when a part "comprises" a certain component, it does not exclude other components but means that the part may further include other components.

[0025] Throughout the specification, a member is referred to as being "on" another member not only when the member is in contact with the other member, but also when there is another member between the two members.

[0026] The terms "first", "second", etc. are used only to distinguish one component from another component, and are not intended to limit the components.

[0027] The singular expression includes the plural expression unless the context clearly indicates otherwise.

[0028] The identification numbers in each step are used for ease of description and do not dictate the order of each step, and each step may be performed in a manner different from the stated order unless the context clearly dictates a particular order.

[0029] Hereinafter, application principles and embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0030] In this specification, the term "device according to the present disclosure" includes all of the various devices capable of performing computation and providing a result to a user. For example, the device according to the present disclosure may include all of a computer, a server device, and a portable terminal, and may be in any form.

[0031] Here, the computer may include, for example, a notebook computer, a desktop computer, a laptop computer, a tablet PC, a slate PC, etc. equipped with a web browser.

[0032] The server device is a server that communicates with external devices and processes information, and may include an application server, a computing server, a database server, a file server, a game server, a mail server, a proxy server, a web server, and the like.

[0033] The portable terminal is, for example, a wireless communication device that ensures portability and mobility, and may include all kinds of handheld-based wireless communication devices such as PCS (Personal Communication System), GSM (Global System for Mobile communications), PDC (Personal Digital Cellular), PHS (Personal Handyphone System), PDA (Personal Digital Assistant), IMT (International Mobile Telecommunication)-2000, CDMA (Code Division Multiple Access)-2000, W-CDMA (W-Code Division Multiple Access), WiBro (Wireless Broadband Internet) terminals, and smartphones, as well as wearable devices such as watches, rings, bracelets, anklets, necklaces, glasses, contact lenses, or head-mounted devices (HMDs).

[0034] 1 is a schematic block diagram of an ammonia decomposition system according to an exemplary embodiment. According to an exemplary embodiment, the ammonia decomposition system may be embodied in a bypass ammonia decomposition system.

[0035] 1, an ammonia decomposition system 10 includes a cracker 100, a fuel cell 200, a bypass line 300, a heating unit 400, an absorption unit 510, and a sensing unit 600. Each component / node can transmit and receive data to and from a different component / node. Each node can be connected through a network.

[0036] The ammonia decomposition system 10 can receive ammonia (NH3) through the cracker 100 and decompose it. If the internal temperature of the cracker 100 temporarily drops, the ammonia decomposition rate may decrease due to catalyst inactivation or performance degradation inside the cracker 100. This causes a relatively increased amount of residual ammonia inside the cracker 100, which may cause the ammonia decomposition rate to decrease again.

[0037] The cracker 100 may receive ammonia and generate hydrogen (H2), nitrogen (N2), and ammonia (NH3) as decomposition products. Then, each fluid absorbed through the absorption unit 510 may be supplied to the fuel cell 200 and used to supply power to the battery. According to an exemplary embodiment, the reaction in which ammonia is decomposed in the ammonia decomposition system 10 is an endothermic reaction. As a result, the temperature in the ammonia decomposition system 10 may decrease as the ammonia decomposition reaction occurs. In this case, the amount of residual ammonia may increase due to incomplete decomposition of ammonia. The ammonia decomposition system 10 according to an embodiment of the present disclosure may continuously promote the ammonia decomposition reaction to reduce the amount of residual ammonia.

[0038] The fuel cell 200 according to an exemplary embodiment may supply nitrogen and unconverted hydrogen to the heating unit 400 before being supplied again to the cracker 100. This may induce a temperature rise effect in the cracker 100 due to the temperature of the unconverted hydrogen being relatively higher than the temperature inside the cracker 100. As described above, the ammonia decomposition system 10 may provide a temperature rise effect by compensating for the imbalance of materials supplied to the cracker 100 and the temperature drop due to the endothermic reaction.

[0039] In the heating section 400, flue gas can be discharged after the above-mentioned reaction.

[0040] FIG. 2 is a schematic block diagram illustrating a configuration of an ammonia decomposition system according to an exemplary embodiment.

[0041] 2, the ammonia decomposition system 10 may include a cracker 100, a control unit 110, a fuel cell 200, a bypass line 300, a heating unit 400, an absorption unit 510, and a sensing unit 600. The internal configuration included in the ammonia decomposition system 10 is not limited thereto. The ammonia decomposition system 10 of the present disclosure may include a processing server or a cloud server that can substantially perform the functions of the control unit 110 in place of the control unit 110. The cracker 100 of the ammonia decomposition system 10 may include a reactor.

[0042] The cracker 100 may include a sensing unit 600 that senses an internal temperature of the cracker 100. The control unit 110 may receive temperature information of the inside of the cracker 100 from the sensing unit 600. According to an exemplary embodiment, the sensing unit 600 may sense the amount of residual ammonia inside the cracker. The control unit 110 may receive information on the amount of residual ammonia inside the cracker 100 from the sensing unit 600. The sensing unit 600 includes a sensor that may sense various information inside the cracker 100 (e.g., the temperature inside the cracker, the amount of residual ammonia inside the cracker, etc.). The control unit 110 may receive the information sensed by the sensing unit 600.

[0043] According to an exemplary embodiment, the control unit 110 can control the operation of the bypass line 300 based on at least one of the temperature information and the residual ammonia information.

[0044] In one embodiment, the control unit 110 can control the operation of the bypass line 300 to open the bypass valve 310 when the internal temperature of the cracker 100 is below a preset temperature. In one embodiment, the control unit 110 can control the operation of the bypass line 300 to open the bypass valve 310 when the residual ammonia inside the cracker is equal to or greater than a preset amount.

[0045] According to an exemplary embodiment, the bypass line 300 may include a hydrogen supply pipe 320 and a bypass valve 310. The hydrogen supply pipe 320 may supply hydrogen, which is a product of the ammonia decomposition reaction inside the cracker 100. For example, the bypass valve 310 may adjust the hydrogen flow rate of the hydrogen supply pipe.

[0046] In one embodiment, the act of opening the valve may be an act of opening the entire valve. In one embodiment, the act of opening the valve may be an act of opening a portion of the valve. In one embodiment, when the bypass valve 310 is opened, flow to the fuel cell 200 may be blocked.

[0047] According to an exemplary embodiment, the act of opening the valve allows the valve opening to be adjusted in a range between a fully closed state and a fully open state.

[0048] The heating section 400 is disposed adjacent to the cracker 100 and can heat the cracker 100. The heating section 400 can heat the cracker 100. The heating section 400 can heat the hydrogen and / or ammonia supplied to the cracker 100.

[0049] The heating unit 400 may penetrate the inside of the cracker 100, extend into the inside of the cracker 100, surround the outside of the cracker 100, or be adjacent to the cracker 100 to transfer heat. Thus, the heating unit 400 may increase the temperature inside the cracker 100 so as to additionally induce an endothermic (decomposition) reaction of ammonia inside the cracker 100.

[0050] The heating unit 400 may include at least one pipe. The control unit 110 may control the operation of the bypass line 300 based on the temperature information to heat the cracker 100 through the at least one pipe.

[0051] The absorber 510 can absorb residual ammonia discharged from the cracker 100. For example, the absorber 510 can be located between the discharge pipe 150 of the cracker 100 and the absorption (inlet) pipe of the fuel cell 200.

[0052] In one embodiment, the absorber 510 can use the absorption piping 210 of the fuel cell 200 as the exhaust piping for the absorber 510 while using the exhaust piping 150 of the cracker 100 as the absorption piping for the absorber 510 .

[0053] The memory unit (not shown) can store data supporting various functions of the ammonia decomposition system 10 and programs for the operation of the control unit 110. The memory unit can store input / output data (e.g., images, videos, etc.). The memory unit can store application programs (or applications) operated in the ammonia decomposition system 10, data for the operation of the ammonia decomposition system 10, and commands. At least a portion of the application programs can be downloaded from an external server via wireless communication.

[0054] The storage unit may include at least one type of storage medium selected from the group consisting of network attached storage (NAS), flash memory type, hard disk type, solid state disk type, silicon disk drive type, multimedia card microtype, card type memory (e.g., SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, magnetic disk, and optical disk. The storage unit may also include a database that is separate from the ammonia decomposition system 10 but is connected to it by wire or wirelessly.

[0055] The ammonia decomposition system 10 may further include an output unit (not shown). The output unit may generate an output related to a visual, an auditory, or a tactile sense, and may include a display unit.

[0056] The display unit may form an interlayer structure with a touch sensor or may be provided as an integral structure with the touch sensor to realize a touch screen. The touch screen may be provided as a user input unit providing an input interface between the ammonia decomposition system 10 and a user, and may provide an output interface between the ammonia decomposition system 10 and a user.

[0057] The display unit (not shown) displays (outputs) information processed in the ammonia decomposition system 10. For example, the display unit can display execution screen information of an application program (e.g., an application) running in the ammonia decomposition system 10, or UI (User Interface) and GUI (Graphic User Interface) information based on the execution screen information.

[0058] At least one component may be added or removed depending on the performance of the components shown in Figure 2. Also, it will be readily understood by those skilled in the art that the relative positions of the components may be changed depending on the performance and structure of the ammonia decomposition system 10.

[0059] However, each of the configurations shown in FIG. 2 may refer to software and / or hardware configurations such as Field Programmable Gate Arrays (FPGAs) and Application Specific Integrated Circuits (ASICs).

[0060] FIG. 3 is a schematic flow chart illustrating a method for ammonia decomposition under load following conditions with a bypass line according to an exemplary embodiment.

[0061] 3, in step S310, a control unit (e.g., control unit 110 of FIG. 2) may receive temperature information inside a cracker (e.g., cracker 100 of FIG. 1). For example, the control unit 110 may receive various information generated through a sensing unit (e.g., sensing unit 600 of FIG. 2) included in the cracker 100 and sensing various information inside the cracker 100. The information received by the control unit 110 may include temperature information inside the cracker 100.

[0062] In step S320, the control unit 110 may receive residual ammonia information inside the cracker 100. The residual ammonia information includes information regarding the amount of residual ammonia remaining as a product after the ammonia reaction inside the cracker 100. The information received by the control unit 110 may include information regarding the amount of residual ammonia inside the cracker 100.

[0063] At least a portion of the residual ammonia can be discharged from the cracker 100 through the discharge line of the cracker 100 and can flow into the absorption line of an absorption section (eg, absorption section 510 of FIG. 2).

[0064] In step S330, the control unit 110 can control the operation of the bypass line based on at least one of temperature information inside the cracker 100 and information on the amount of residual ammonia.

[0065] According to an exemplary embodiment, the control unit 110 can control the operation of the bypass line 300 to increase the efficiency of the ammonia decomposition reaction inside the cracker 100. In some embodiments, the control unit 110 can control the operation of the bypass line 300 to increase the temperature inside the cracker 100. In some embodiments, the control unit 110 can control the operation of the bypass line 300 to reduce the amount of residual ammonia inside the cracker 100.

[0066] FIG. 4 is a flow chart illustrating a method for ammonia decomposition under load following conditions with a bypass line according to an exemplary embodiment.

[0067] Referring to FIG. 4, in step S410, a control unit (e.g., control unit 110 of FIG. 2) may compare the internal temperature of a cracker (e.g., cracker 100 of FIG. 1) with a preset temperature. For example, control unit 110 may check whether the internal temperature of cracker 100 is less than the preset temperature. The preset temperature may be stored in the memory unit. In some embodiments, the preset temperature may correspond to a critical temperature at which an ammonia decomposition reaction may occur inside cracker 100.

[0068] In step S420, the control unit 110 can compare the amount of residual ammonia inside the cracker 100 with a preset amount. For example, the control unit 110 can check whether the amount of residual ammonia inside the cracker is equal to or greater than a preset amount. The preset amount can be stored in the memory unit. In some embodiments, the preset amount can correspond to a critical amount of residual ammonia that can inhibit the ammonia decomposition reaction inside the cracker 100.

[0069] The critical residual ammonia amount may be an amount at which the ammonia decomposition reaction within the cracker 100 begins to be inhibited when the residual ammonia within the cracker 100 is reused as ammonia, which is a reactant.

[0070] In other words, the amount of critical residual ammonia can be determined by the ratio of products to a certain reactant at the point when the ammonia decomposition productivity inside the cracker 100 changes from positive (+) to negative (-), even if the residual ammonia is reused as a reactant.

[0071] In step S430, the control unit 110 can control the operation of the bypass line (eg, the bypass line 300 in FIG. 2) to open the bypass valve.

[0072] In one embodiment, in step S410, if the internal temperature of the cracker 100 is lower than the preset temperature, the control unit 110 controls the operation of the bypass line 300 to open the bypass valve. The control unit 110 can control the degree of opening of the bypass valve in stages according to the difference between the preset temperature and the internal temperature of the cracker 100.

[0073] In one embodiment, in step S420, if the amount of residual ammonia is equal to or greater than the preset amount, the control unit 110 controls the operation of the bypass line 300 to open the bypass valve. The control unit 110 can control the degree of opening of the bypass valve in stages according to the difference between the amount of residual ammonia and the preset amount.

[0074] As described above, the control unit 110 can control the degree of opening of the bypass valve in proportion to the degree of the temperature or amount difference.

[0075] In step S440, the control unit 110 may control the pressure unit to operate. The pressure unit may be a device that applies pressure to the cracker 100 to adjust the pressure inside the cracker 100. The temperature inside the cracker 100 may be increased by the pressure unit.

[0076] In step S420, if the residual ammonia is equal to or greater than the preset amount, the control unit 110 can control the operation of the pressurizing unit so as to increase the pressure inside the cracker 100 instead of opening the bypass valve. As the pressure is applied to the cracker 100 by the pressurizing unit, the temperature inside the cracker 100 can be increased. This can promote the ammonia decomposition reaction inside the cracker 100 so that the amount of residual ammonia inside the cracker 100 can be reduced.

[0077] 5a and 5b are block diagrams showing an example of repositioning of the bypass line. In Figs. 5a, 5b, 6 and 7, the exhaust pipe 150, the absorption pipe 210, the hydrogen supply pipe 320 and the bypass valve 310 shown in Fig. 1 are omitted for ease of illustration.

[0078] 5a and 5b, the connection position of the bypass line 300 can be changed as appropriate. The ammonia decomposition system 10 may include a bypass line 300 to interact with a stage before a portion of the residual ammonia flows into the absorption unit 510, or a stage after the residual ammonia is absorbed in the absorption unit 510 and only hydrogen and nitrogen are discharged.

[0079] The bypass line 300 may connect a pipe connecting the cracker 100 and the fuel cell 200 to a pipe connecting the fuel cell 200 and the heating unit 400. Thus, the control unit 110 may supply relatively high temperature hydrogen from the hydrogen supply pipe of the bypass line 300 to the heating unit.

[0080] 5a, the bypass line 300 can be located between the discharge pipe of the cracker 100 and the absorption pipe of the fuel cell 200. In this case, the ammonia decomposition system 10 can use the discharge pipe of the cracker 100 as the absorption pipe of the absorption unit 510, and the absorption pipe of the fuel cell 200 as the discharge pipe of the absorption unit 510. The bypass line 300 can connect the discharge pipe of the cracker 100 or the absorption pipe of the absorption unit 510 and the discharge pipe of the fuel cell 200.

[0081] 5b, the bypass line 300 can be located between the discharge pipe of the absorber 510 and the absorption pipe of the fuel cell 200. In this case, the bypass line 300 can connect the discharge pipe of the absorber 510 or the absorption pipe of the fuel cell 200 to the discharge pipe of the fuel cell 200.

[0082] The ammonia decomposition system 10 can control the operation of the bypass line 300 so that hydrogen in the product can bypass the fuel cell 200. The ammonia decomposition system 10 can have a structure that can utilize residual heat of a battery.

[0083] In the ammonia decomposition system 10 according to the exemplary embodiment, the battery can be disposed adjacent to the heating section 400. This allows the ammonia decomposition system 10 to rapidly increase the temperature inside the cracker 100.

[0084] FIG. 6 is a block diagram of an ammonia decomposition system including a separation membrane according to an exemplary embodiment.

[0085] 6, the ammonia decomposition system 10 may include a separation membrane 700 adjacent to the cracker 100 or coupled to a discharge pipe of the cracker 100. The separation membrane 700 is permeable to hydrogen and nitrogen among hydrogen, nitrogen, and residual ammonia discharged from the discharge pipe of the cracker 100. The separation membrane 700 can prevent the residual ammonia from flowing into the absorption pipe of the absorption unit 510.

[0086] The separation membrane 700 may include a material that does not allow ammonia particles to pass through in one direction. For example, the separation membrane 700 may have a structure including a membrane filter. This allows the ammonia decomposition system 10 to suppress the residual ammonia from being discharged to the outside of the separation membrane 700.

[0087] In one embodiment, the separation membrane 700 can block the permeation of ammonia particles by an electrical reaction. The ammonia decomposition system 10 can control the operation of the separation membrane 700 based on the residual ammonia information. For example, when residual ammonia is detected in the discharge pipe of the cracker 100, the control unit 110 can control the separation membrane 700 so that the residual ammonia does not flow to the absorption unit 510 or the bypass line 300 through the separation membrane 700.

[0088] FIG. 7 is a block diagram of a valvable ammonia decomposition system according to an exemplary embodiment.

[0089] Referring to FIG. 7, the ammonia decomposition system 10 may include valves 120, 130 (e.g., a first valve 120, a second valve 130) adjacent to the cracker 100 or coupled to the absorption and exhaust piping of the cracker 100.

[0090] The first valve 120 can adjust the flow rate of ammonia flowing in from an absorption pipe of the cracker 100. The second valve 130 can adjust the flow rates of hydrogen, nitrogen, and residual ammonia discharged from a discharge pipe of the cracker 100. The control unit 110 can control the operation of at least one of the first valve 120 and the second valve 130 to control the pressure and heating temperature inside the cracker 100.

[0091] According to an exemplary embodiment, when the residual ammonia inside the cracker 100 is equal to or greater than a preset amount, the control unit 110 can close at least one of the first valve 120 and the second valve 130. When the first valve 120 is closed, the reaction pressure and temperature inside the cracker 100 can be rapidly adjusted. Furthermore, when the second valve 130 is closed, the reaction pressure and temperature inside the cracker 100 can be rapidly adjusted.

[0092] As described above, the control unit 110 can create an environment that can promote a reaction inside the cracker 100 by combining the closed and open states of the first valve 120 and the second valve 130.

[0093] According to an exemplary embodiment, the ammonia decomposition system 10 includes a first valve 120 and a second valve 130 in the absorption and exhaust piping of the cracker 100, respectively, and the closing / opening and the degree to which each valve 120, 130 is capable of being controlled.

[0094] The disclosed embodiments may be embodied in the form of a storage medium storing instructions executable by a computer. The instructions may be stored in the form of program code, and a program module may be generated by a processor to perform the operations of the disclosed embodiments. The storage medium may be embodied in a form readable by a computer.

[0095] The computer-readable storage medium includes any type of storage medium in which computer-readable instructions are stored, such as a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic tape, a magnetic disk, a flash memory, an optical data storage device, etc.

[0096] As described above, the disclosed embodiments have been described with reference to the accompanying drawings. Those skilled in the art will understand that the present disclosure may be implemented in a form different from the disclosed embodiments without changing the technical idea or essential features of the present disclosure. The disclosed embodiments are illustrative and should not be construed as being limited.

Claims

1. A cracker that decomposes ammonia to generate hydrogen; A heating unit for heating the cracker; A fuel cell that reacts the hydrogen to generate electricity; a bypass line connecting a pipe connecting the cracker and the fuel cell, and a pipe connecting the fuel cell and the heating unit; A sensing unit that senses the temperature inside the cracker; a control unit that receives temperature information inside the cracker from the sensing unit; The control unit is Receive residual ammonia information inside the cracker; An ammonia decomposition system that controls operation of the bypass line based on at least one of the temperature information and the residual ammonia information.

2. The bypass line is A hydrogen supply pipe; a bypass valve for adjusting a hydrogen flow rate in the hydrogen supply pipe; 2. The ammonia decomposition system according to claim 1, wherein the control unit is configured to open the bypass valve to control the operation of the bypass line when the temperature inside the cracker is less than a preset temperature.

3. Further comprising an absorption section for absorbing residual ammonia discharged from the cracker; the absorption unit is located between a discharge pipe of the cracker and an absorption pipe of the fuel cell, The exhaust pipe of the cracker is provided by the absorption pipe of the absorption unit, and the exhaust pipe of the fuel cell is provided by the absorption pipe of the absorption unit; The bypass line is Connecting the exhaust pipe of the cracker or the absorption pipe of the absorption unit to the exhaust pipe of the fuel cell, or 3. The ammonia decomposition system according to claim 2, wherein a discharge pipe of the absorption section or an absorption pipe of the fuel cell is connected to a discharge pipe of the fuel cell.

4. 4. The ammonia decomposition system according to claim 3, wherein the control unit is configured to open the bypass valve and control the operation of the bypass line when the residual ammonia inside the cracker is equal to or greater than a preset amount.

5. 5. The ammonia decomposition system according to claim 4, further comprising a separation membrane that allows permeation of the hydrogen and nitrogen among the hydrogen, nitrogen and residual ammonia discharged from an exhaust pipe of the cracker.

6. A first valve for adjusting the flow rate of ammonia flowing in from an absorption pipe of the cracker; 5. The ammonia decomposition system of claim 4, further comprising a second valve for regulating the flow rates of hydrogen, nitrogen and residual ammonia discharged from the discharge piping of the cracker.

7. 7. The ammonia decomposition system of claim 6, wherein the control unit is configured to close at least one of the first valve and the second valve when the residual ammonia inside the cracker is equal to or greater than a preset amount, and to control the pressure and the elevated temperature inside the cracker.

8. The ammonia decomposition system according to claim 4, further comprising a pressurizing section for adjusting the pressure inside the cracker.

9. The ammonia decomposition system according to claim 8 , wherein the control unit is configured to increase the pressure inside the cracker by the pressurizing unit when the residual ammonia inside the cracker is equal to or greater than a preset amount.

10. receiving temperature information inside the cracker from a sensing unit that senses the internal temperature of the cracker that decomposes ammonia to generate hydrogen; receiving residual ammonia information within the cracker; and controlling operation of a bypass line connecting a piping connecting the cracker and a fuel cell and a piping connecting the fuel cell and a heating section based on at least one of the temperature information and the residual ammonia information.

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