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Methanol fuel cell system

A fuel cell system, high-temperature fuel cell technology, applied in the direction of fuel cells, fuel cell additives, circuits, etc., can solve the problems of bulky, complex process structure, low efficiency, etc., achieve the advantages of efficient operation and optimize thermal management measures Effect

Inactive Publication Date: 2019-07-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low temperature is based on Nafion-based proton exchange membrane, the working temperature is 60-80°C, and the tolerance of carbon monoxide (CO) is only 10ppm, but the concentration of CO in the mixed gas from the reformer can be as high as tens of thousands of ppm, so Need to use multi-stage purification or Pd membrane separation to reduce CO concentration, the whole system has complex process structure, large volume and low efficiency

Method used

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  • Methanol fuel cell system
  • Methanol fuel cell system
  • Methanol fuel cell system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The process flow of methanol reforming fuel cell system is shown in figure 2One road of methanol is pumped into the combustion chamber 201 through the pump 211, and the heat generated by combustion is transferred to the reforming chamber 202; the other road of methanol flows into the reforming chamber 202 through the pump 212 to undergo steam reforming reaction, and the generated hydrogen enters the stack 300; The heat generated during operation is removed by the heat conduction oil, and the circulation pump 422 pumps the heat conduction oil into the electric stack, flows through the air-cooled radiator 421, and then enters the electric stack again. During the system start-up process, methanol in the combustion chamber is ignited by means of electric ignition or electric heating device 231; the heating of the electric stack also needs the help of electric heating device 423, which first conducts heat to heat-conducting oil, and the heat-conducting oil heats up the elect...

Embodiment 2

[0044] Embodiment 2: The system flow of methanol fuel cell is shown in image 3 , on the basis of Embodiment 1, the system adds a heat transfer oil heat exchange chamber 420 and a stack air inlet preheater 430 . The heat exchange chamber 420 can transfer part of the heat of the exhaust gas of the combustion chamber to the heat transfer oil during the start-up phase, and the heat transfer oil then transfers the heat to the electric stack. At the same time, the use of electric heating and exhaust heat exchange can greatly reduce the heating time of the electric stack. The function of the air inlet preheater 430 is to transfer the heat of the exhaust gas to the inlet air, so as to avoid the excessive temperature gradient in the stack from affecting its life.

Embodiment 3

[0045] Embodiment 3: the system flow of methanol fuel cell see Figure 4 . The system adopts an integrated methanol reformer, and the reformer includes: a combustion chamber 201 , a reforming chamber 202 , a burning methanol vaporization chamber 203 , a mixing chamber 204 , and a heat exchange chamber 205 . The whole reformer is carved and milled from a whole piece of aluminum alloy. In addition, the system also has an integrated heat exchanger, which includes: a vaporizer 410 , an exhaust gas cooling oil heat exchanger 420 , a reformed gas cooling chamber 440 , and an exhaust gas heat exchange chamber 450 . The whole heat exchanger makes full use of the waste heat of the combustion exhaust gas, the heat produced by the stack, the waste heat of the stack exhaust gas, and the high-temperature reformed gas to provide heat for the vaporization of methanol, and at the same time reduces the temperature of the reformed gas entering the stack to avoid high temperature damage to the ...

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Abstract

A methanol reforming high-temperature fuel cell system is mainly composed of a high-temperature fuel cell stack module, a reformer module and an energy utilization module. The energy utilization module generates heat through a reactor to vaporize methanol, and supplies heat to the steam reforming reaction through combustion of hydrogen in the anode exhaust gas. Compared with the prior art, the thermal management measures of the system are optimized by rationally utilizing the thermal energy of each grade, and the advantages are obvious in rapid startup and efficient operation of the system.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a methanol fuel cell system. Background technique [0002] Fuel cell is a kind of energy conversion device that directly converts fuel chemical energy into electrical energy. It has many advantages such as high efficiency, no pollution, and low noise. It has broad application prospects in the fields of power supply, backup power supply and mobile power supply. [0003] Hydrogen is the preferred fuel for fuel cells, but its large-scale application is limited due to many problems in the preparation, storage, and transportation of hydrogen. The use of liquid fuels (methanol, ethanol, diesel, etc.) to reform hydrogen production is an effective solution. Methanol, as the simplest small molecule alcohol, is cheap and easy to obtain, with low reforming temperature, high concentration of hydrogen production and few impurities, which makes methanol reforming attract people's attenti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04H01M8/04082H01M8/04089H01M8/04276H01M8/22
CPCH01M8/04H01M8/04089H01M8/04201H01M8/04276H01M8/22Y02E60/50
Inventor 杨林林孙公权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI