Novel high-temperature alcohol reforming fuel cell system

Abstract

The invention discloses a novel high-temperature alcohol reforming fuel cell system. According to the technical scheme of the invention, the system comprises a fuel preparation system module, a reformer and a high-temperature stack; the fuel preparation system module comprises a controller, a methanol-water mixing tank, a methanol supply unit connected with the methanol-water mixing tank and a water supply unit; the methanol-water mixing tank is connected with a mixed liquid metering pump; the methanol-water mixing tank, the methanol tank and the water tank can send liquid level signals to thecontroller; the controller can send a driving signal to a methanol metering pump, a water metering pump and a mixed liquid metering pump; the mixed liquid metering pump is connected with the reformer; a hydrogen mixed gas outlet of the reformer is connected with a first heat exchanger; the hydrogen mixed gas enters the high-temperature stack after passing through the first heat exchanger; and high-temperature steam generated by the high-temperature stack enters a second heat exchanger. According to the scheme provided by the invention, self supply of a water solution can be realized, the methanol-water ratio is flexibly adjusted, and the endurance mileage of the fuel cell can be increased.

Description

Technical field [0001] The present invention relates to the technical field of fuel cells, in particular to a novel high-temperature alcohol reforming fuel cell system. Background technique [0002] Since the alcohol reforming fuel cell adopts reforming hydrogen production technology, the relatively high CO concentration of reformed gas cannot be directly used in low-temperature fuel cell stack systems. Therefore, high-temperature stacks with a reaction temperature between 150 and 200 ℃ are used. The high-temperature reactor can withstand higher concentrations of CO, and the reforming reaction takes methanol as an example. The main equation is: CH 3 OH+H 2 O→CO 2 +3H 2 , The reforming reaction fuel is a certain mass concentration of alcohol aqueous solution. The fuel supply device of the current methanol reforming fuel cell system is a fuel tank similar to a fuel car, and the fuel has been matched in proportion. After the reaction is completed, the generated water is discharged ...

AI Technical Summary

Problems solved by technology

[0004] The high-temperature fuel cell for hydrogen production by alcohol reforming in the prior art (temperature range is 150-200°C) has the following disadvantages and deficiencies: 1. Equipped with a large methanol-water mixing tank, which increases the weight of the vehicle and reduces the load capacity of the vehicle

Because there is a lot of water in the tank, the volume of the methanol water tank is large, and the quality increases accordingly, resulting in a decrease in the cruising range of the vehicle and frequent refilling; Larger, if it is necessary to adjust the mixing ratio of the alcohol aqueous solution, the current product cannot be adjusted because the raw material mixing ratio has been fixed; 3. The current reaction temperature is between 150 and 200°C and the high-temperature electric stack alcohol reforming hydrogen fuel After the electrochemical reaction of the battery, a large amount of water vapor is generated. The temperature of the water vapor is between 150 and 200°C and the flow rate is large. In the existing equipment, it is mainly discharged from the system directly, causing a certain amount of heat loss and water loss. Big

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