阅读说明：本技术 氢气提纯装置及方法 (Hydrogen purification device and method ) 是由 陈锐 于 2020-06-28 设计创作，主要内容包括：本发明提供一种氢气提纯装置,包括催化反应器,催化反应器包括燃烧层和与燃烧层相邻的选择性氧化层；燃烧层设置有催化燃烧催化剂,选择性氧化层设置有一氧化碳选择性氧化催化剂；燃烧层设置有燃料入口和燃烧层氧化气体入口；选择性氧化层设置有氢气入口、选择性氧化层氧化气体入口和氢气出口。本发明还提供使用上述氢气提纯装置提纯氢气的方法。本发明的氢气提纯装置结构紧凑,氢气提纯效率/体积比高,可作为在氢气应用点的氢气原位提纯装置-作为车载氢气纯化装置、家用燃料电池热电联产(CHP)氢气纯化装置或加氢站氢气纯化装置,允许灵活使用氢燃料,可降低运营成本,提高燃料电池动力系统的可靠性和效率,并长时间连续供电。(The invention provides a hydrogen purification device, which comprises a catalytic reactor, wherein the catalytic reactor comprises a combustion layer and a selective oxidation layer adjacent to the combustion layer; the combustion layer is provided with a catalytic combustion catalyst, and the selective oxidation layer is provided with a carbon monoxide selective oxidation catalyst; the combustion layer is provided with a fuel inlet and a combustion layer oxidizing gas inlet; the selective oxidation layer is provided with a hydrogen inlet, a selective oxidation layer oxidation gas inlet and a hydrogen outlet. The invention also provides a method for purifying hydrogen by using the hydrogen purification device. The hydrogen purification device has compact structure and high hydrogen purification efficiency/volume ratio, can be used as a hydrogen in-situ purification device at a hydrogen application point, namely a vehicle-mounted hydrogen purification device, a household fuel cell Cogeneration (CHP) hydrogen purification device or a hydrogen purification device of a hydrogen station, allows flexible use of hydrogen fuel, can reduce the operation cost, improves the reliability and efficiency of a fuel cell power system, and continuously supplies power for a long time.)

1. A hydrogen purification apparatus comprising a catalytic reactor, the catalytic reactor comprising a combustion layer and a selectively oxidized layer adjacent to the combustion layer; the combustion layer is provided with a catalytic combustion catalyst, and the selective oxidation layer is provided with a carbon monoxide selective oxidation catalyst; the combustion layer is provided with a fuel inlet and a combustion layer oxidizing gas inlet; the selective oxidation layer is provided with a hydrogen inlet, a selective oxidation layer oxidation gas inlet and a hydrogen outlet.

2. The hydrogen purification apparatus according to claim 1, wherein the selectively oxidizing layer is provided on both sides of the combustion layer or the combustion layer is provided on one side or both sides of the selectively oxidizing layer; the combustion layer comprises a fuel distribution layer and an oxidation gas distribution layer, the oxidation gas distribution layer being disposed on either side of the fuel distribution layer, or the fuel distribution layer being disposed on one or both sides of the oxidation gas distribution layer; the oxidizing gas distribution layer and the fuel distribution layer are communicated through a porous plate.

3. The hydrogen purification apparatus according to claim 1, further comprising a hydrogen supply line and an oxidizing gas supply line; the fuel inlet and the hydrogen inlet are respectively connected with the hydrogen supply pipeline; the combustion layer oxidizing gas inlet and the selective oxidation layer oxidizing gas inlet are respectively connected with the oxidizing gas supply pipeline; the oxidizing gas supply line is supplied with air or oxygen.

4. The hydrogen purification apparatus according to claim 1, wherein a sulfur-tolerant catalyst is further provided in the selective oxidation layer; the catalytic combustion catalyst comprises an alumina carrier and Pt/Pd loaded on the alumina carrier; the carbon monoxide selective oxidation catalyst comprises gamma-Al₂O₃Carrier and supported on gamma-Al₂O₃The core-shell structure nanoparticle catalyst is a metal M with a platinum monolayer covering the surface, and the metal M is one or more of Ru, Rh, Ir and Pd.

5. The hydrogen purification apparatus according to claim 1, wherein the hydrogen inlet is connected to a hydrogen purity sensor and a flow regulator; the fuel inlet, the combustion layer oxidizing gas inlet and the selective oxidation layer oxidizing gas inlet are respectively connected with a flow regulator; and a temperature sensor is arranged between the combustion layer and the selective oxidation layer.

6. The hydrogen purification apparatus according to claim 5, wherein the hydrogen purity sensor is a hydrogen purity sensor based on solid oxide fuel cell, surface plasmon resonance, Bragg fiber, palladium-plated thin film micromirror, palladium-plated tapered fiber, or low temperature electrochemical cell technology.

7. The hydrogen purification apparatus according to claim 5, wherein the hydrogen purity sensor, the flow regulator and the temperature sensor are respectively connected to a controller.

8. The hydrogen purification apparatus according to claim 1, comprising one or more catalytic reactors; the one or more catalytic reactors are stacked on top of each other.

9. A method for purifying hydrogen gas using the hydrogen purification apparatus according to any one of claims 1 to 8, comprising the steps of:

allowing fuel and oxidizing gas to enter the combustion layer and allowing the fuel and oxidizing gas to undergo catalytic combustion under the action of a catalytic combustion catalyst; enabling the temperature sensor to detect the temperature between the combustion layer and the selective oxidation layer and sending temperature information to the controller;

passing hydrogen to be purified into the selectively oxidized layer; enabling the hydrogen purity sensor to detect the concentration of the hydrogen to be purified and sending the hydrogen purity information to the controller;

and the controller judges whether the reaction in the selective oxidation layer is in the optimal temperature range or not according to the temperature information and the hydrogen purity information, and controls the reaction temperature in the oxidation layer to be in the optimal temperature range by controlling the flow regulator.

10. The method of purifying hydrogen according to claim 9, wherein the method of controlling the reaction temperature in the oxidation layer within the optimum temperature range by controlling a flow regulator comprises:

when the controller judges that the reaction temperature in the selective oxidation layer is lower than the optimal temperature, the flow of fuel and/or oxidizing gas entering a combustion layer is increased by controlling a flow regulator, or the flow of hydrogen to be purified entering the selective oxidation layer is reduced;

and when the controller judges that the reaction temperature in the selective oxidation layer is higher than the optimal temperature, reducing the flow of the fuel and/or the oxidizing gas entering the combustion layer by controlling a flow regulator, or increasing the flow of the hydrogen to be purified entering the selective oxidation layer.

Technical Field

The invention relates to the field of hydrogen purification, in particular to a small-sized low-grade hydrogen in-situ purification device and method.

Background

The hydrogen energy can utilize various primary energy sources to cleanly and efficiently generate electric energy and heat energy, and is a key solution of 21 st century energy sources. Hydrogen energy has zero emission energy conversion and power generation characteristics and is currently being designed for a range of application scenarios including automotive, stationary power supplies, aerospace, and consumer electronics. Future development goals of hydrogen energy and fuel cells include: (1) the cost is reduced; (2) flexibility in fuel supply is achieved; (3) the system is efficiently integrated; (4) has excellent reliability and durability; (5) strengthening the foundation construction; (6) understanding and complying with governmental legal regulations regarding fuel cell site selection, insurance and certification.

Hydrogen energy is not a primary energy source like coal and natural gas, butIs an energy carrier that is generated by existing energy systems based on different conventional primary energy sources. In the long term, renewable energy will become the most important source of hydrogen energy production. The combination of regenerating hydrogen, producing hydrogen from nuclear energy, and producing hydrogen from fossil-powered energy conversion systems coupled with the capture and safe sequestration of carbon dioxide emissions is an almost completely carbon-free hydrogen production route. Currently, hydrogen produced in various hydrogen production modes contains impurities mainly of carbon monoxide (CO) and possibly trace amounts of sulfides (mainly H)₂S), carbon dioxide, hydrocarbons, inert gases, particulates, water, and oxygen.

CO is H₂One of the most prominent impurities in Proton Exchange Membrane Fuel Cell (PEMFC) applications is that it blocks the active sites in the Pt catalyst and poisons the fuel cell catalyst. Studies suggest that H for PEMFC₂The CO content should be less than 10 ppm. SAE J-2719 and ISO/PDTS 14687-2 define a minimum purity of "fuel cell grade hydrogen" of 99.99% (99.97% if helium is considered), allowing less than 100ppm total impurities, including less than 5ppm (typically 1-3ppm) oxygen, less than 5ppm (typically 1-3ppm) water, and less than 100ppb CO. For producing H₂The outlet CO concentration of the Water Gas Shift (WGS) reactor is 0.1-1.0%, and the Pressure Swing Adsorption (PSA) technology can reach most of H proposed by SAE/ISO₂Impurities standard, but may be H₂The cost is increased by 20%. Realization of H₂Medium and ultra low CO concentration vs. H₂Production presents a significant challenge, resulting in high costs of "fuel cell grade hydrogen" which has been identified as one of the obstacles in the practical application of fuel cells.

At present, the hydrogen purification technology is mainly divided into physical purification technology and chemical purification technology. The physical purification technique is to utilize H₂And impurities, including: pressure Swing Adsorption (PSA) method, which removes impurities using an adsorbent; high Temperature Diffusion (HTD) method uses metal films to produce High purity H₂But the cost is higher; low Temperature Diffusion (LTD) diffuses hydrogen gas through a polymer membrane to produce high purity H₂(ii) a Solvent(s)Absorption processes separate CO and CO at high pressure and low temperature₂Dissolving in solvent to obtain pure H₂In the gas phase. These physical purification techniques are well established, require complex and cumbersome designs, and have low power to weight ratios suitable for large scale hydrogen purification, but are not suitable for small scale hydrogen purification at the point of hydrogen use. Chemical purification techniques remove impurities from low grade hydrogen by chemical oxidation reactions, including: low Temperature Shift (LTS) technology, typically used in industrial scale hydrogen production processes, must be very large in size and weight to achieve significant conversion due to the relatively slow reaction rate; selective oxidation (PROX) uses a small amount of oxygen to selectively oxidize CO while consuming a minimal amount of H₂The reaction is fast, has the greatest application potential through proper reactor design and proper temperature control, and can remarkably reduce the overall weight of the system and the cost. Selective oxidation of carbon monoxide is a multistep process, generally following the Langmuir-Hinshelwood kinetics for CO and O₂Single site competition mechanism between: in the first step, CO is chemisorbed on a Pt surface, while an oxygen molecule must be adsorbed in the vicinity of the Pt surface site, the O-O bond is cleaved, and the oxygen atom reacts with the surface activated CO molecule to form carbon dioxide.

The chemical composition of the hydrogen sold in the market at present has large difference, and low-grade hydrogen (CO concentration is more than 10ppm) cannot be directly used for the PEMFC. In addition, since the hydrogen fuel for the fuel cell for vehicles needs to be filled at the hydrogen refueling station, which means that the hydrogen fuel for the fuel cell for vehicles needs to be transported from the hydrogen production/purification plant to the hydrogen refueling station, there is a possibility that H will be supplied during the transportation of hydrogen₂Causing contamination and thus even for hydrogen that has a factory purity that meets PFMFC usage requirements, the purity may no longer meet PFMFC usage requirements when the hydrogen station is filled onto a vehicle.

Disclosure of Invention

The invention aims to provide a compact hydrogen purification device and a purification method which can purify hydrogen with high efficiency at application points.

The technical scheme is as follows: the invention provides a hydrogen purification device, which comprises a catalytic reactor, wherein the catalytic reactor comprises a combustion layer and a selective oxidation layer adjacent to the combustion layer; the combustion layer is provided with a catalytic combustion catalyst, and the selective oxidation layer is provided with a carbon monoxide selective oxidation catalyst; the combustion layer is provided with a fuel inlet and a combustion layer oxidizing gas inlet; the selective oxidation layer is provided with a hydrogen inlet, a selective oxidation layer oxidation gas inlet and a hydrogen outlet.

The heat source generating part which provides heat for selective oxidation is directly integrated into the hydrogen purification device instead of being arranged outside the purification device and then transmitted into the hydrogen purification device through the heat conducting part or the heat conducting fluid, so that the energy utilization rate can be greatly improved, the volume of the hydrogen purification device is reduced to the greatest extent, and the hydrogen purification efficiency is improved; the combustion layer and the selective oxidation layer are arranged to be layered, and the selective oxidation layer is stacked on one side or two sides of the combustion layer, so that heat generated by catalytic combustion in the combustion layer can be efficiently transferred to the selective oxidation layer, the volume of the hydrogen purification device is further reduced, and the reaction temperature of the selective oxidation layer is efficiently controlled.

Preferably, the selective oxidation layer is arranged on two sides of the combustion layer or the combustion layer is arranged on one side or two sides of the selective oxidation layer; the combustion layer comprises a fuel distribution layer and an oxidation gas distribution layer, the oxidation gas distribution layer is arranged on two sides of the fuel distribution layer, or the fuel distribution layer is arranged on one side or two sides of the oxidation gas distribution layer; the oxidizing gas distribution layer and the fuel distribution layer are communicated through the porous plate. The structural design can promote the fuel and the oxidizing gas to be mixed in the combustion layer timely and fully, and the release of heat in the combustion layer is controlled conveniently by the mixing of the fuel and the oxidizing gas, so that the temperature control accuracy of the hydrogen purification device is improved.

The hydrogen purification device also comprises a hydrogen supply pipeline and an oxidizing gas supply pipeline; the fuel inlet and the hydrogen inlet are respectively connected with a hydrogen supply pipeline; the combustion layer oxidizing gas inlet and the selective oxidation layer oxidizing gas inlet are respectively connected with an oxidizing gas supply pipeline; the oxidizing gas supply line supplies air or oxygen.

Preferably, in the selective presence of oxygenA sulfur-resistant catalyst is also arranged in the formation layer; the catalytic combustion catalyst can be a catalyst which can catalyze fuel (such as hydrogen) to perform catalytic combustion, and preferably, the catalytic combustion catalyst comprises an alumina carrier and Pt/Pd supported on the alumina carrier; the carbon monoxide selective oxidation catalyst may be an existing catalyst that selectively catalyzes the oxidation of carbon monoxide, and preferably, the carbon monoxide selective oxidation catalyst comprises gamma-Al₂O₃Carrier and supported on gamma-Al₂O₃The core-shell structure nano-particle catalyst is a metal M with a platinum monolayer covered on the surface, and the metal M is one or more of Ru, Rh, Ir and Pd; existing sulfur tolerant catalysts may be used.

In order to accurately control the reaction temperature of the selective oxidation of the carbon monoxide in the selective oxidation layer, a hydrogen inlet is connected with a hydrogen purity sensor and a flow regulator, and the hydrogen purity sensor is used for detecting the purity of the hydrogen entering the hydrogen purification device and sending the purity information to a controller; a temperature sensor is arranged between the combustion layer and the selective oxidation layer and used for detecting the reaction temperature and sending temperature information to the controller; connecting a fuel inlet, a combustion layer oxidizing gas inlet and a selective oxidation layer oxidizing gas inlet to flow regulators, respectively, which receive instructions from a controller; the hydrogen purity sensor, the flow regulator and the temperature sensor are respectively connected with the controller, and the controller sends signals to the flow regulator according to the hydrogen purity information and the temperature information to control the flow of the fuel, the oxidizing gas and the hydrogen, so that the reaction temperature in the whole catalytic reactor is controlled.

The hydrogen purity sensor can use the existing device which can detect and send a hydrogen concentration signal; preferably, the hydrogen purity sensor is a hydrogen purity sensor based on solid oxide fuel cell, surface plasmon resonance, bragg fiber, palladium-plated thin film micromirror, palladium-plated tapered fiber, or low temperature electrochemical cell technology.

The hydrogen purification device can be arranged to comprise one or more than two catalytic reactors according to the amount of hydrogen required to be purified, and the two or more than two catalytic reactors can be arranged in a stacking mode or other integrated modes.

The combustion layer and the selective oxidation layer are stacked together to form a layered structure, and specific dimensions can be specifically set according to the scale of hydrogen purification.

Another aspect of the present invention provides a hydrogen purification method for purifying hydrogen using the above-described hydrogen purification apparatus, comprising the steps of:

enabling fuel and oxidizing gas to enter a combustion layer, and enabling the fuel and the oxidizing gas to be subjected to catalytic combustion under the action of a catalytic combustion catalyst; enabling the temperature sensor to detect the temperature between the combustion layer and the selective oxidation layer and sending temperature information to the controller;

passing the hydrogen to be purified into the selective oxidation layer; enabling the hydrogen purity sensor to detect the concentration of the hydrogen to be purified and sending the hydrogen purity information to the controller;

the controller judges whether the reaction in the selective oxidation layer is in the optimal temperature range or not according to the temperature information and the hydrogen purity information, and controls the reaction temperature in the selective oxidation layer to be in the optimal temperature range by controlling the flow regulator.

Preferably, the method for controlling the reaction temperature in the oxidation layer within the optimum temperature range by controlling the flow regulator includes:

when the controller judges that the reaction temperature in the selective oxidation layer is lower than the optimal temperature, the flow of fuel and/or oxidizing gas entering the combustion layer is increased by controlling the flow regulator, or the flow of hydrogen to be purified entering the selective oxidation layer is reduced;

when the controller judges that the reaction temperature in the selective oxidation layer is higher than the optimum temperature, the flow rate of the fuel and/or the oxidizing gas entering the combustion layer is reduced by controlling the flow rate regulator, or the flow rate of the hydrogen to be purified entering the selective oxidation layer is increased.

The working principle of the hydrogen purification device is as follows: the carbon monoxide selective oxidation reaction is an endothermic process during the light-off phase; in addition, although the selective oxidation of carbon monoxide is an exothermic reaction in the normal reaction process, the heat released by the selective oxidation of carbon monoxide in the hydrogen purification process is not enough to support the reaction to continue, and therefore, the selective oxidation of carbon monoxide in the hydrogen purification process requires external heat supply. When the hydrogen purification device works, fuel and oxidizing gas are supplied to the combustion layer, catalytic combustion is carried out under the action of the catalytic combustion catalyst, and heat is released; the heat emitted by the combustion layer is transferred to the selective oxidation layer stacked together with the combustion layer, so that heat is provided for the selective oxidation reaction of carbon monoxide in the selective oxidation layer; a temperature sensor is arranged between the combustion layer and the selective oxidation layer, and the temperature sensor sends temperature information between the combustion layer and the selective oxidation layer to the controller; supplying hydrogen to be purified to the selective oxidation layer, detecting the purity of the hydrogen entering a hydrogen supply pipeline by a hydrogen purity sensor, and sending hydrogen purity information to a controller; the controller controls the flow of fuel and oxidizing gas into the combustion layer according to the temperature and hydrogen purity information, thereby precisely controlling the reaction temperature of the selective oxidation layer.

Has the advantages that: the hydrogen purification device has compact structure and high hydrogen purification efficiency/volume ratio, can be used as a hydrogen in-situ purification device at a hydrogen application point, namely a vehicle-mounted hydrogen purification device, a household fuel cell Cogeneration (CHP) hydrogen purification device or a hydrogen purification device of a hydrogenation station, and can detect and selectively oxidize low-grade H at the hydrogen application point₂Of (1) is described. The hydrogen purification device and method of the invention allow flexible use of hydrogen fuel, reduce operating costs, improve reliability and efficiency of fuel cell power systems, and provide continuous power for long periods of time.

Drawings

Fig. 1 is a schematic structural view of a hydrogen purification apparatus of the present invention.

Wherein the reference numerals are as follows:

1-a catalytic reactor; 2-a controller; 3-a hydrogen supply line; 4-an oxidizing gas supply line; 5-a combustion layer; 6-a selective oxidation layer; 7-a thermocouple; 8-a fuel distribution layer; 9-an oxidizing gas distribution layer; 10-a fuel inlet; 11-combustion layer oxidizing gas inlet; 12-a hydrogen inlet; 13-a selective oxidation layer oxidation gas inlet; 14-a hydrogen outlet; 15-hydrogen output line; 16-hydrogen purity sensor; 17-a first flow regulator; 18-a second flow regulator; 19-third flow regulator.

The arrows in fig. 1 indicate the direction of fluid flow/diffusion or signal transmission.

Detailed Description

The following detailed description gives some specific details to facilitate understanding of the invention. However, it will be understood by those skilled in the art that the present teachings may be practiced without these specific details. It should be noted that, for ease of understanding, the dimensions of the various parts shown in the drawings are not drawn to scale. Techniques known to those skilled in the art may not be described in detail herein, but should be considered part of the specification.

As shown in fig. 1, a hydrogen purification apparatus includes a catalytic reactor 1, a controller 2, a hydrogen supply line 3, and an oxidizing gas supply line 4. The catalytic reactor 1 comprises a combustion layer 5 and selective oxidation layers 6 stacked on two sides of the combustion layer, wherein a thermocouple 7 is arranged between the combustion layer 5 and the selective oxidation layers 6 and used for detecting reaction temperature and sending temperature information to the controller 2. A catalytic combustion catalyst is provided in the combustion layer 5. The combustion layer 5 comprises a fuel distribution layer 8 and an oxidizing gas distribution layer 9 which are stacked together and communicated through a porous plate, the oxidizing gas distribution layer 9 is arranged on two sides of the fuel distribution layer 8, the fuel distribution layer 8 is provided with a fuel inlet 10, the fuel inlet 10 is connected with the hydrogen supply pipeline 3, the oxidizing gas distribution layer 9 is provided with a combustion layer oxidizing gas inlet 11, the combustion layer oxidizing gas inlet 11 is connected with the oxidizing gas supply pipeline 4, and air or oxygen is supplied into the oxidizing gas supply pipeline 4. A carbon monoxide selective oxidation catalyst and a sulfur-resistant catalyst are provided in the selective oxidation layer 6. The selective oxidation layer 6 is provided with a hydrogen inlet 12, a selective oxidation layer oxidation gas inlet 13 and a hydrogen outlet 14, the hydrogen inlet is connected with the hydrogen supply pipeline 3, the selective oxidation layer oxidation gas inlet 13 is connected with the oxidation gas supply pipeline 4, and the hydrogen outlet 14 is connected with the hydrogen output pipeline 15. The hydrogen supply pipeline 3 is provided with a hydrogen purity sensor 16 and a first flow regulator 17, and the hydrogen purity sensor 16 is used for detecting the purity of the hydrogen entering the hydrogen purification device and sending the purity information to the controller 2; the first flow regulator 17 is configured to receive a command from the controller to control the flow rate of hydrogen. The combustion layer oxidizing gas inlet 11 is connected to a second flow regulator 18, and the selective oxidation layer oxidizing gas inlet 13 is connected to a third flow regulator 19. The second flow regulator 18 and the third flow regulator 19 are configured to receive instructions from the controller 2 and control the flow rate of the oxidizing gas.

It should be noted that, although fig. 1 shows that the hydrogen purification apparatus includes only one catalytic reactor, when the flow rate of hydrogen to be purified is large, more than two catalytic reactors may be disposed in the hydrogen purification apparatus, and different catalytic reactors may be integrated in a layer-by-layer stacking manner to reduce the volume of the overall hydrogen purification apparatus. Although fig. 1 shows the hydrogen purification apparatus in which the combustion layer is also connected to the hydrogen supply line, the combustion layer is not necessarily connected to the hydrogen supply line, but may be connected to other fuel supply lines, since the hydrogen supplied to the combustion layer is only supplied for catalytic combustion to supply heat for the selective oxidation reaction of carbon monoxide in the selective oxidation layer. In addition, although fig. 1 shows the connection positions of the combustion layer and the hydrogen supply line and the oxidizing gas supply line and the connection positions of the selective oxidation layer and the hydrogen supply line and the oxidizing gas supply line in the hydrogen purification apparatus are located on the same side, these connection positions may not be located on the same side. Although fig. 1 shows the selective oxidation layer disposed on both sides of the combustion layer including the fuel distribution layer and the oxidation gas distribution layer disposed on both sides of the fuel distribution layer, it is also possible to dispose the combustion layer on one side or both sides of the selective oxidation layer, the combustion layer not being divided into the fuel distribution layer and the oxidation gas distribution layer, or the fuel distribution layer being disposed on one side or both sides of the oxidation gas distribution layer.

The method for purifying hydrogen using the above hydrogen purification apparatus comprises the steps of:

the fuel and the oxidizing gas enter the combustion layer 5, and the fuel and the oxidizing gas are subjected to catalytic combustion under the action of a catalytic combustion catalyst; the thermocouple 7 is enabled to detect the temperature between the combustion layer 5 and the selective oxidation layer 6 and send temperature information to the controller 2;

passing the hydrogen to be purified into the selective oxidation layer 6; the hydrogen purity sensor 16 detects the concentration of hydrogen to be purified and sends the hydrogen purity information to the controller 2;

the controller 2 judges whether the reaction in the selective oxidation layer 6 is in the optimum temperature range or not according to the temperature information and the hydrogen purity information, and when the controller 2 judges that the reaction temperature in the selective oxidation layer 6 is lower than the optimum temperature, the flow of fuel and/or oxidizing gas entering the combustion layer 5 is increased by controlling the flow regulator, or the flow of hydrogen to be purified entering the selective oxidation layer 6 is reduced;

when the controller 2 judges that the reaction temperature in the selective oxidation layer 6 is higher than the optimum temperature, the flow rate of the fuel and/or the oxidizing gas into the combustion layer 5 is reduced by controlling the flow rate regulator, or the flow rate of the hydrogen gas to be purified into the selective oxidation layer 6 is increased.

The hydrogen purification device can purify hydrogen with the CO concentration of 5ppm to 5000ppm, so that the CO concentration in the hydrogen is reduced to be less than 5ppm, and the lower limit of the sensitivity of the PEMFC to CO is 10ppm, so that the hydrogen purification device can completely meet the purity requirement of the hydrogen for the PEMFC.