CN114420972A - PEMFC power generation system using ammonia decomposition gas as raw material - Google Patents
PEMFC power generation system using ammonia decomposition gas as raw material Download PDFInfo
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- CN114420972A CN114420972A CN202210086850.2A CN202210086850A CN114420972A CN 114420972 A CN114420972 A CN 114420972A CN 202210086850 A CN202210086850 A CN 202210086850A CN 114420972 A CN114420972 A CN 114420972A
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- ammonia
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- fuel cell
- heat exchanger
- power generation
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 233
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 99
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 42
- 238000010248 power generation Methods 0.000 title claims abstract description 19
- 239000002994 raw material Substances 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 92
- 239000000446 fuel Substances 0.000 claims abstract description 71
- 239000001257 hydrogen Substances 0.000 claims abstract description 36
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 36
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000007084 catalytic combustion reaction Methods 0.000 claims abstract description 26
- 239000006096 absorbing agent Substances 0.000 claims abstract description 20
- 239000002918 waste heat Substances 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 15
- 230000003197 catalytic effect Effects 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 238000003487 electrochemical reaction Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 239000012495 reaction gas Substances 0.000 abstract description 4
- 239000000567 combustion gas Substances 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000003421 catalytic decomposition reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
- H01M8/04022—Heating by combustion
Abstract
The invention discloses a PEMFC power generation system taking ammonia decomposition gas as a raw material, which comprises an ammonia decomposer, a first heat exchanger, an ammonia absorber, a catalytic combustion chamber and a second heat exchanger. The system utilizes the first heat exchanger and the second heat exchanger to utilize the waste heat in the ammonia decomposer, thereby reducing the heat loss in the system and achieving the purpose of improving the system efficiency; the heat of the system is subjected to afterburning by utilizing the catalytic combustion chamber, and the adopted combustion gas is the cathode tail gas of the fuel cell; the waste of hydrogen is effectively avoided, and the purposes of energy conservation and emission reduction are achieved; the gas obtained after ammonia decomposition is directly used as the reaction gas of the fuel cell, so that the system structure is simplified, and the system efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of hydrogen preparation, in particular to a PEMFC power generation system taking ammonia decomposition gas as a raw material.
Background
With the rapid development of economy, mankind faces enormous difficulties and challenges in terms of energy. In order to reduce the crisis caused by the excessive use of fossil energy, the search for new high-quality energy, advanced energy manufacturing technology, and the development and application of new clean energy have caused a hot trend of research. Hydrogen has attracted much attention as a clean energy source, and various methods for producing hydrogen and utilizing hydrogen are also widely developed. As a gas with strong escape property and flammability, the problems of transportation and source of the hydrogen gas also bring a lot of troubles to people. Therefore, the development of safe and efficient hydrogen storage and supply technology is the fundamental problem for realizing the utilization of hydrogen sources. The industry still uses the electrolyzed water as the main source of hydrogen, and although the electrolyzed water is free of pollution and simple to operate, the process of producing hydrogen by electrolyzing water needs a large amount of electric energy and has low efficiency. Therefore, the search for a high-efficiency and energy-saving hydrogen production method gradually becomes a hot problem.
The ammonia gas has the advantages of high hydrogen storage mass fraction (17.8 wt%), high volume hydrogen storage density (121Kg H2m-3 at 10bar), convenient storage (liquefiable at room temperature less than 10bar), reproducibility and the like, and is an ideal chemical hydrogen storage medium. The ammonia gas does not produce NOx products in the medium-low temperature chemical reaction, so that a sustainable energy system with zero carbon emission can be realized by constructing hydrogen energy circulation based on nitrogen, hydrogen and ammonia gas.
The efficient decomposition of ammonia mainly has three modes: thermal or catalytic decomposition of ammonia, mechanochemical decomposition of ammonia, and electrochemical decomposition. The on-site purification research of hydrogen comprises pressure swing adsorption, cryogenic adsorption and membrane separation technical research. However, the purification technology of hydrogen is too complex, which is not favorable for miniaturization of on-site hydrogen production.
Therefore, it is required to design a PEMFC power generation system directly using ammonia decomposition gas as a raw material, so as to simplify the power generation system and further improve the efficiency of the system.
Disclosure of Invention
The invention aims to provide a PEMFC power generation system taking ammonia decomposition gas as a raw material, which solves the problems in the prior art and can realize
In order to achieve the purpose, the invention provides the following scheme: the invention provides a PEMFC power generation system taking ammonia decomposition gas as raw material, which comprises
An ammonia decomposer; the ammonia decomposer is used for decomposing ammonia gas into decomposition gas;
the first heat exchanger is used for carrying out heat exchange on the decomposed gas in the ammonia decomposer and ammonia gas introduced from the outside;
an ammonia absorber for introducing the decomposition gas into the fuel cell;
the fuel cell is used for electrochemical reaction to generate electricity;
and the catalytic combustor is used for performing catalytic combustion on the fuel cell anode tail gas and air to provide heat.
A second heat exchanger and an air pump are also arranged; the air pump is used for compressing outside air into the second heat exchanger; and the second heat exchanger is communicated with the ammonia decomposer and is used for heating the compressed air by waste heat in the ammonia decomposer and conveying the heated compressed air into the catalytic combustion chamber.
The decomposition gas is a mixed gas of hydrogen and nitrogen; the undecomposed ammonia gas remains in the decomposed gas.
The fuel cell is a proton exchange membrane fuel cell taking a nitrogen-hydrogen mixed gas as a fuel; the cathode of the fuel cell is in communication with the ammonia absorber.
The first heat exchanger supplies the ammonia gas introduced from the outside to the ammonia decomposer; and the decomposition gas exchanges heat with the ammonia introduced from the outside to reduce the temperature of the decomposition gas.
The catalytic combustor supplies heat after catalytic combustion to the ammonia decomposer.
The ammonia absorber can also absorb the ammonia gas in the mixer conveyed by the first heat exchanger, and only the pure decomposed gas is conveyed to the fuel cell.
The outlet of the anode in the fuel cell is normally open.
Parallel flow channels are formed in the fuel cell, and the length-width ratio of the fuel cell is 2.
The invention discloses the following technical effects: 1. the first heat exchanger and the second heat exchanger are utilized to utilize the waste heat in the ammonia decomposer, so that the heat loss in the system is reduced, and the aim of improving the system efficiency is fulfilled;
2. the heat of the system is subjected to afterburning by utilizing the catalytic combustion chamber, and the adopted combustion gas is the cathode tail gas of the fuel cell; the waste of hydrogen is effectively avoided, and the purposes of energy conservation and emission reduction are achieved;
3. the gas obtained after ammonia decomposition is directly used as the reaction gas of the fuel cell, so that the system structure is simplified, and the system efficiency is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of the overall system;
FIG. 2 is a schematic structural diagram of an embodiment of a fuel cell;
wherein, 1-a first heat exchanger; 2-an ammonia decomposer; 3-a second heat exchanger; 4-air pump; 5-an ammonia absorber; 6-a fuel cell; 7-catalytic combustion chamber.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a PEMFC power generation system taking ammonia decomposition gas as raw material, which comprises
An ammonia decomposer 2; the ammonia decomposer 2 is used for decomposing ammonia gas into decomposition gas;
a first heat exchanger 1 for exchanging heat between the decomposed gas in the ammonia decomposer 2 and the ammonia gas introduced from the outside;
an ammonia absorber 5 for introducing the decomposed gas into the fuel cell 6;
the fuel cell 6 is used for electrochemical reaction to generate electricity;
and the catalytic combustor 7 is used for catalytically combusting the anode tail gas of the fuel cell 6 and air to provide heat.
A second heat exchanger 3 and an air pump 4 are also arranged; the air pump 4 is used for compressing the outside air into the second heat exchanger 3; the second heat exchanger 3 is communicated with the ammonia decomposer 2 and is used for heating the compressed air by waste heat in the ammonia decomposer 2 and conveying the heated compressed air into the catalytic combustion chamber 7.
The decomposed gas is a mixed gas of hydrogen and nitrogen; undecomposed ammonia gas remains in the decomposed gas.
The fuel cell 6 is a proton exchange membrane fuel cell using a nitrogen-hydrogen mixed gas as a fuel; the cathode of the fuel cell 6 communicates with an ammonia absorber 5.
In the present embodiment, the fuel cell 6 is capable of directly utilizing the impure hydrogen flowing out from the ammonia absorber, and the fuel cell 6 can still perform electrochemical reaction to generate the required electric energy under the condition that the fuel gas contains partial nitrogen.
The first heat exchanger 1 supplies the ammonia gas introduced from the outside to the ammonia decomposer 2; the decomposition gas exchanges heat with ammonia gas introduced from the outside to lower the temperature of the decomposition gas.
The catalytic combustor 7 supplies heat after catalytic combustion to the ammonia decomposer 2.
The ammonia absorber 5 may also absorb the ammonia gas in the mixer delivered by the first heat exchanger 1, and deliver only the purified decomposed gas to the fuel cell 6.
The outlet of the anode in the fuel cell 6 is normally open.
In the present embodiment, the fuel cell is a generally serpentine fuel cell 6, and the anode inlet gas pressure is increased by adjusting the state of the exhaust valve at the anode outlet of the fuel cell 6 to be normally open. So as to avoid the phenomenon of unstable output of the galvanic pile caused by overlarge gas pressure inside the galvanic pile and frequent gas exhaust of the galvanic pile; meanwhile, the galvanic pile can still have sufficient gas source to react under the condition that the mixed gas is taken as the gas source.
The fuel cell 6 has parallel flow channels therein, and the fuel cell 6 has an aspect ratio of 2.
In another embodiment, as shown in fig. 2, the fuel cell 6 flow channels are modified by replacing the "serpentine" flow channels of the current fuel cell 6 with parallel flow channels. The fuel cell 6 plate size was reduced and the aspect ratio was set to "2: 1". The aim of this is to ensure that the mixture can be discharged quickly by the fuel cell after the reaction has ended. The method not only ensures the stable reaction in the fuel cell, but also ensures the stable output of the fuel cell.
In the prior art, a general method of an ammonia hydrogen production decomposition system is to convert ammonia gas into pure hydrogen and then introduce the pure hydrogen into a fuel cell for electrochemical reaction. The hydrogen production by ammonia gas needs links such as pyrolysis, purification and the like, and the complexity of a fuel system is increased.
Further, deep coupling of the fuel cell system with the ammonia decomposition hydrogen production system in the present power generation system can achieve three main advantages, one is to simplify the fuel supply system from ammonia to the fuel cell 6; secondly, the unreacted hydrogen in the tail gas of the anode of the fuel cell 6 and the high-temperature waste heat in the ammonia decomposition reaction process are fully utilized, the energy utilization rate of the ammonia decomposition hydrogen production is improved, thirdly, the fuel excess coefficient of the fuel cell is improved, and concentration polarization caused by high-power load when the fuel cell uses non-pure hydrogen fuel is avoided. Compared with the existing system, the system achieves the purpose of saving energy, reducing emission and improving the system efficiency, the initial system efficiency is 34%, and the maximum efficiency can reach 48% after optimization.
In one embodiment of the invention, the fuel cell 6; hydrogen and oxygen are used as reaction gases to generate electric energy; the fuel cell 6 is connected to the ammonia absorber 5 and the catalytic combustor 7. The decomposed gas output from the ammonia absorber 5 is used as reaction gas to carry out electrochemical reaction; the outlet of the anode is connected with the catalytic combustion chamber, and the gas which is not reacted at the anode is sent into the catalytic combustion chamber 7.
The ammonia decomposer 2 is used for catalytically decomposing ammonia gas into nitrogen gas and ammonia gas, and is sequentially communicated with the first heat exchanger 1, the second heat exchanger 3 and the catalytic combustor 7. The gas inlet of the ammonia decomposer 2 is respectively connected with the first heat exchanger 1 and the catalytic combustor 7, so that the heated ammonia gas in the first heat exchanger 1 enters the ammonia decomposer 2 and receives the gas heated by the catalytic combustor 7; the gas outlet of the ammonia decomposer 2 is respectively connected with the second heat exchanger 3 and the first heat exchanger 1, and is used for sending the nitrogen and the hydrogen decomposed by the ammonia decomposer 2 into the first heat exchanger 1 and sending the waste heat and the waste gas into the second heat exchanger 3;
the ammonia absorber 5 is used for removing residual ammonia gas in the generated gas of the ammonia decomposer 2; the first heat exchanger 1 and the fuel cell 6 are communicated in sequence. The inlet of the ammonia absorber 5 is connected with the gas outlet of the first heat exchanger 1 so as to absorb residual ammonia gas in the decomposed gas; the outlet of the ammonia absorber 5 is connected with the cathode inlet of the fuel cell 6, and the treated gas is input into the fuel cell 6 to participate in reaction;
the catalytic combustion chamber 7 carries out catalytic combustion on the anode tail gas and air to provide heat required by the ammonia decomposer 2; respectively connected with the second heat exchanger 3, the anode outlet of the fuel cell 6 and the inlet of the ammonia decomposer 2. The catalytic combustion chamber 7 is connected with the outlet end of the anode of the fuel cell 6 and the second heat exchanger 3 through a gas inlet so as to carry out catalytic combustion reaction of the tail gas of the anode of the fuel cell 6 and high-temperature air; the outlet of the catalytic combustion chamber is connected with the ammonia decomposer 2, so that the reacted high-temperature gas is sent into the ammonia decomposer 2 for heat exchange.
The first heat exchanger 1 is respectively connected with an ammonia absorber 5, an ammonia decomposer 2 and an ammonia gas source; the inlet of the first heat exchanger 1 is connected with an external ammonia gas source and an ammonia decomposer 2, and high-temperature gas flowing out of the ammonia decomposer 2 is subjected to heat exchange with the external ammonia gas source through the first heat exchanger 1, so that the aims of heating the ammonia gas before decomposition and cooling the gas after decomposition are fulfilled.
Further, the gas temperature of the ammonia decomposition gas is reduced to 50 ℃, the external ammonia gas source temperature is converted into a gaseous state through the first heat exchanger 1, and the gas is preheated to 350 ℃.
The second heat exchanger 3 is connected with the catalytic combustion chamber 7, the ammonia decomposer 2 and the air pump 4 respectively. The inlet of the second heat exchanger 3 is connected with the ammonia decomposer 2 and the air pump 4, the tail gas of the ammonia decomposer 2 and the air compressed by the air pump exchange heat in the second heat exchanger 3, and the compressed air is converted into high-temperature and high-pressure air which is sent into the catalytic combustion chamber 7 through the outlet of the second heat exchanger 3.
The working process is as follows, as shown in figure 1, external ammonia gas is heated and then flows into the port I of the ammonia decomposer 2 from the port III of the first heat exchanger 1, heat energy required by the ammonia decomposer 2 is sent into the port II of the ammonia decomposer 2 from the port III of the catalytic combustion chamber 7, and high-temperature ammonia gas in the ammonia decomposer 2 is subjected to decomposition reaction to generate hydrogen gas, nitrogen gas and a small amount of ammonia gas. The decomposed gas is sent to IV of the first heat exchanger 1 through IV port of the ammonia decomposer 2. The residual heat of the decomposed gas is sent into a port I of a second heat exchanger 3 through a port III;
the residual heat of the ammonia decomposer 2 enters the heat exchanger through the port I of the second heat exchanger 3, and exchanges heat with the air pressurized by the air pump 4, so that the purpose of air temperature rise is achieved. The air after temperature rise is sent into the catalytic combustion chamber 7 through the port II;
the air pump 4 pressurizes the external air and then sends the pressurized external air into the port III of the second heat exchanger 3;
the decomposed gas cooled by the first heat exchanger 1 enters an ammonia absorber 5, the decomposed gas removes residual ammonia gas in the ammonia absorber 5 to obtain pure hydrogen-nitrogen mixed gas, and the mixed gas is sent to a fuel cell 6;
the fuel cell 6 uses the hydrogen-nitrogen mixed gas as the reaction gas to carry out electrochemical reaction to generate electric energy for the electric appliance. The tail gas after reaction is sent to a port II of the catalytic combustion chamber through an anode outlet;
the tail gas of the fuel cell 6 and the high-pressure air heated by the second heat exchanger 3 are subjected to catalytic combustion in the catalytic combustion chamber 7 to generate high-temperature gas, and the high-temperature gas is sent into the ammonia decomposer 2 through the port III to provide heat energy required by the ammonia decomposition reaction.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (9)
1. A PEMFC power generation system using ammonia decomposition gas as a raw material is characterized by comprising:
an ammonia decomposer (2); the ammonia decomposer (2) is used for decomposing ammonia gas into decomposition gas;
the first heat exchanger (1) is used for carrying out heat exchange on the decomposed gas in the ammonia decomposer (2) and ammonia gas introduced from the outside;
an ammonia absorber (5) for introducing the decomposed gas into a fuel cell (6);
the fuel cell (6) is used for electrochemical reaction to generate electricity;
and the catalytic combustor (7) is used for performing catalytic combustion on the anode tail gas of the fuel cell (6) and air to provide heat.
2. A PEMFC power generation system using ammonia decomposition gas as a raw material according to claim 1, wherein: a second heat exchanger (3) and an air pump (4) are also arranged; the air pump (4) is used for compressing the outside air into the second heat exchanger (3); the second heat exchanger (3) is communicated with the ammonia decomposer (2) and is used for heating the compressed air by waste heat in the ammonia decomposer (2) and conveying the heated compressed air into the catalytic combustion chamber (7).
3. A PEMFC power generation system using ammonia decomposition gas as a raw material according to claim 1, wherein: the decomposition gas is a mixed gas of hydrogen and nitrogen; the undecomposed ammonia gas remains in the decomposed gas.
4. A PEMFC power generation system using ammonia decomposed gas as a raw material according to claim 3, wherein: the fuel cell (6) is a proton exchange membrane fuel cell taking nitrogen-hydrogen mixed gas as fuel; the cathode of the fuel cell (6) is in communication with the ammonia absorber (5).
5. A PEMFC power generation system using ammonia decomposition gas as a raw material according to claim 1, wherein: the first heat exchanger (1) supplies the ammonia gas introduced from the outside to the ammonia decomposer (2); and the decomposition gas exchanges heat with the ammonia introduced from the outside to reduce the temperature of the decomposition gas.
6. A PEMFC power generation system using ammonia decomposition gas as a raw material according to claim 1, wherein: the catalytic combustor (7) supplies heat after catalytic combustion to the ammonia decomposer (2).
7. A PEMFC power generation system using ammonia decomposition gas as a raw material according to claim 1, wherein: the ammonia absorber (5) can also absorb ammonia gas in the mixer delivered by the first heat exchanger (1), and only delivers pure decomposed gas to the fuel cell (6).
8. A PEMFC power generation system using ammonia decomposition gas as a raw material according to claim 1, wherein: the outlet of the anode in the fuel cell (6) is normally open.
9. A PEMFC power generation system using ammonia decomposition gas as a raw material according to claim 1, wherein: the fuel cell (6) is internally provided with parallel flow channels, and the length-width ratio of the fuel cell (6) is 2.
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Cited By (7)
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Application publication date: 20220429 |