High-temperature fuel cell system

Abstract

The invention discloses a high-temperature fuel cell system, and the system comprises a fuel supply unit, a primary treatment unit, a secondary treatment unit and an air supply unit; the fuel supply unit comprises a fuel storage device and a fuel pipeline; the fuel primary treatment unit is a plasma reactor with a high-voltage electrode and a grounding electrode, is provided with a fuel, air and water mixture inlet and a primary product outlet, and is used for converting fuel into mixed gas of hydrogen, carbon monoxide, low-carbon hydrocarbons and the like; the treatment product in the fuel primary treatment unit is further treated, so the concentration of hydrogen in the product is increased, and the concentration of carbon monoxide in the product is reduced; the fuel cell reaction unit is a high-temperature fuel cell stack with an anode fuel inlet, an anode tail gas outlet, a cathode air inlet and a cathode air outlet; and the air supply unit is communicated with the cathode inlet ofthe fuel cell reaction unit and the fuel primary treatment unit, and provides air for the fuel cell reaction unit and the fuel treatment unit.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a fuel cell system which reduces the concentration of low-carbon hydrocarbons (C1-C2) and carbon monoxide in the reaction gas while increasing the concentration of hydrogen, and also relates to the connection between each unit in the fuel cell system thermal coupling. Background technique [0002] Due to its high energy conversion efficiency and environmental friendliness, fuel cells are recognized as the clean energy conversion technology with the most development potential in the 21st century, and are also regarded as one of the best options to replace traditional internal combustion engines. And portable power supply and other fields have broad application prospects. The hydrogen source problem restricts the wide application of fuel cells. The means to solve the hydrogen source problem include reforming hydrogen production and hydrogen storage. Reforming hydrog...

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Problems solved by technology

However, the selectivity of the plasma reforming product is poor, that is, the product contains a large amount of alkanes and carbon monoxide, etc., and the composition of the reaction gas is not suitable for fuel cells. The synthesis gas generated after plasma reforming can pass through the steam reforming catalyst, and the alkanes undergo steam reforming reaction. , increase the hydrogen composition, the generated reaction gas further enters the water vapor shift reactor, carbon monoxide undergoes a water gas shift reaction, the concentration of carbon monoxide decreases, and the concentration of hydrogen further increases

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