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Alcohol-based fuel cell system

A fuel cell system and fuel cell stack technology, which is applied in the direction of fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve the problems of low fuel recovery rate and low system efficiency, save heat dissipation space, avoid replacement Thermal equipment or heat exchange energy consumption, the effect of improving fuel utilization and system efficiency

Active Publication Date: 2018-08-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention invents an alcohol fuel cell system, which has the advantages of good gas-liquid separation effect, high fuel recovery utilization rate, and low energy consumption, and overcomes the low fuel recovery rate in the prior art , low system efficiency and other shortcomings

Method used

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  • Alcohol-based fuel cell system
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Embodiment 1

[0023] CO produced by stack anode 2 After the gas passes through the gravity separation of the 5 liquid storage tanks, the gaseous CO 2 Carrying saturated water vapor into the contactor 10 in the gas-liquid separator 7 at a flow rate of 1-20L / min, and meeting the air tail gas with a flow rate of 1-100L / min generated by the cathode of the stack and cooled by the radiator, the two Substance and heat exchange is fully carried out in 10 contactors. CO after heat and mass exchange 2 The steam methanol in the vapor is cooled to a liquid state at a temperature of 50-20 degrees Celsius, and is trapped in 7 gas-liquid separators. The loss rate of methanol after interception is reduced by 10-80%. The invention can increase the methanol utilization rate of the whole methanol fuel cell system by 1-5%.

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Abstract

The invention provides an alcohol-based fuel cell system, which comprises a fuel cell stack, a cooler, a gas-liquid separator, a liquid fuel storage device and a gas supply device, wherein a gas-liquid mixture entering the gas-liquid separator through a first inlet and a second inlet can be subjected to complete mixing contact through the internal arrangement of the gas-liquid separator. Accordingto the present invention, the high-temperature gas-liquid mixture at the fuel cell stack anode outlet is subjected to first absorption by the liquid fuel storage device, and the obtained material andthe cooled cathode gas-liquid mixture are co-separated through the gas-liquid separator; after the cathode gas-liquid mixture is cooled by the cooler, the outlet is the supersaturated wet air, wherein the wet air can be used as the cold source so as to be subjected to co-gas-liquid separation with the anode gas-liquid mixture absorbed by the liquid fuel storage device, and can further enter through the first inlet and the second inlet so as to completely contact the gas-liquid mixture to reduce the temperature of the gas outlet, such that the unreacted or incompletely-reacted liquid fuel carried along with the gas discharge is further reduced.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to an alcohol fuel cell system with low energy consumption and high efficiency. Background technique [0002] The water generated by the cathode of the current direct methanol fuel cell is condensed and recovered through heat dissipation, and the carbon dioxide at the anode is separated from the anode methanol solution by a gravity-separated gas-liquid separation device, and then discharged directly out of the battery system. [0003] Calculations show that the methanol vapor carried in the carbon dioxide vapor at high temperature (80 degrees Celsius) is finally exhausted from the system without being utilized, which can cause the fuel utilization rate of the direct methanol fuel cell system to drop by 3-4%. Existing solutions add radiators to dissipate the heat from the hot carbon dioxide vapor, recover the condensed methanol and discharge the carbon dioxide. However, this meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1011H01M8/0606H01M8/04007
CPCH01M8/04007H01M8/0606H01M8/1011Y02E60/50
Inventor 孙海赵世雄孙公权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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