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Catalytic treatment device and catalytic treatment method for tail gas of fuel cell

A catalytic treatment and fuel cell technology, applied in fuel cells, fuel cell additives, electrical components, etc., can solve problems such as increasing uncertainty, difficulty in ensuring intrinsic safety, and inability to achieve hydrogen-containing exhaust gas treatment, to prevent sudden The effect of the spread of fire

Active Publication Date: 2015-06-24
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If this method is adopted, an additional soda water device is required to deal with the moisture in the gas, which increases the uncertainty of the extremely explosive hydrogen-oxygen complex catalytic process, and it is difficult to ensure intrinsic safety
[0007] In addition, these known fuel cell tail gas treatment devices and methods still cannot realize the treatment of hydrogen-containing tail gas containing water vapor under the condition of ensuring intrinsic safety.

Method used

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  • Catalytic treatment device and catalytic treatment method for tail gas of fuel cell
  • Catalytic treatment device and catalytic treatment method for tail gas of fuel cell
  • Catalytic treatment device and catalytic treatment method for tail gas of fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1: A method for catalytic treatment of fuel cell tail gas:

[0053] The hydrogen gas at the anode end of the fuel cell and the air at the cathode end of the fuel cell pass through the amount of hydrogen gas and air controlled by the gas mass flow meter respectively. After the two gases are mixed, they enter the gas mixer and then enter the micro-plate reactor. Pt-Al 2 o 3 Under the action of the catalyst, after the catalytic treatment, the gas analyzer will test the hydrogen concentration of the exhaust gas, and then it will be discharged into the atmosphere according to the standard.

[0054] In this embodiment, a comparative treatment experiment was carried out on wet and dry premixed gas with 15 ml / min of hydrogen-oxygen mixed gas (4% hydrogen, 96% air) under the condition of using traditional catalyst and hydrophobically modified catalyst. The results of the change of hydrogen concentration with time by two different methods are shown in image 3 , 4 ...

Embodiment 2

[0061] Embodiment 2: A kind has through hydrophobically modified Pt-Al 2 o 3 Coating method for catalyst-coated channel plates:

[0062] 1) Weigh the alumina nano powder, concentrated nitric acid solution, and deionized water (alumina powder: concentrated nitric acid: deionized water 1g: 0.8ml: 3.8ml), put them in a glass container, and stir at room temperature 2 hours until a uniform colloid is formed, and then aged for 3 hours; take the colloid and evenly coat it on an Fe-Cr-Al plate with micro-channels, age it at room temperature for 2 hours, and then place the Fe-Cr-Al plate in a drying oven to dry overnight , the temperature is 110 degrees; the cured catalyst coating is finally calcined in a muffle furnace for 2 hours at a temperature of 400 degrees, the furnace is cooled to room temperature, and stored in vacuum packaging;

[0063] 2) prepare ethanol solution of chloroplatinic acid, carry out precious metal platinum load by excessive impregnation method to iron-chromiu...

Embodiment 3

[0066] Embodiment 3: a kind of with hydrophobically modified Pt-Al 2 o 3 Coating method for catalyst-coated channel plates:

[0067] 1) Weigh the alumina nano powder, concentrated nitric acid solution, and deionized water (alumina powder: concentrated nitric acid: deionized water 1g: 1.2ml: 4.2ml), put them in a glass container, and stir at room temperature 2 hours until a uniform colloid is formed, and then aged for 3 hours; take the colloid and evenly coat it on an Fe-Cr-Al plate with micro-channels, age it at room temperature for 2 hours, and then place the Fe-Cr-Al plate in a drying oven to dry overnight , the temperature is 110 degrees; the cured catalyst coating is finally calcined in a muffle furnace for 2.2 hours at a temperature of 450 degrees, the furnace is cooled to room temperature, and stored in vacuum packaging;

[0068] 2) Prepare ethanol solution of chloroplatinic acid, and carry out precious metal platinum loading on iron-chromium-aluminum-alumina coating b...

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Abstract

The invention belongs to the field of the tail gas treatment of a fuel cell, and relates to a catalytic treatment device and a catalytic treatment method for tail gas of a hydrogen-oxygen fuel cell. The catalytic treatment device for the tail gas of the fuel cell comprises a gas mixer, wherein an inlet of the gas mixer is respectively connected with a hydrogen outlet pipeline of a fuel cell anode end and an air outlet pipeline of a fuel cell cathode end, an outlet of the gas mixer is connected with a micro plate-type reactor, a passage plate which is provided with a hydrophobic modification Pt-Al2O3 catalyst coating is arranged inside the micro plate-type reactor, and the periphery of the micro plate-type reactor is provided with a heating system and a thermocouple for precisely controlling the temperature of the reactor. The iron-chromium-aluminum plate which is coated with the hydrophobic Pt-Al2O3 coating is adopted to catalytically treat the tail gas of the hydrogen fuel cell, and the tail gas of the hydrogen fuel cell is efficiently and simply treated under a damp atmosphere mainly by utilizing the narrow-slit flame-blocking effect of the micro plate-type reactor and the hydrophobic characteristic of the hydrophobic catalyst.

Description

technical field [0001] The invention belongs to the field of fuel cell tail gas treatment, and relates to a device and method for catalytic treatment of hydrogen-oxygen fuel cell tail gas and a method for preparing a hydrophobic catalyst that can effectively catalyze hydrogen-oxygen composite gas in a humid atmosphere. Background technique [0002] The tail gas of the hydrogen fuel cell system mainly comes from the hydrogen discharged from the anode side of the battery. In order to ensure the utilization rate of hydrogen, the hydrogen supply circuit generally closes and recycles the remaining gas, but with the operation of the battery, the impurity gas contained in the anode side of the battery will continue to accumulate, leading to catalyst poisoning, which will adversely affect the performance of the battery, and humidification Water can also collect on the gas flow channels and MEA to the extent that it can cause "flooding" of the battery electrodes, reducing battery per...

Claims

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Application Information

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IPC IPC(8): H01M8/04H01M8/06
CPCH01M8/04H01M8/06H01M8/0662Y02E60/50
Inventor 于新海于伟唐佳丽涂善东卢付杰
Owner EAST CHINA UNIV OF SCI & TECH
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