Internal reforming solid oxide fuel cell stack

Abstract

The invention particularly relates to an internal reforming solid oxide fuel cell stack. The fuel cell stack comprises a galvanic pile which is formed by stacking a plurality of structural units, an airflow buffer cavity which is located around the galvanic pile, and end plates which are located on the upper side and the lower side of the galvanic pile; each structural unit comprises a cathode airflow distribution plate, a connecting body, an anode airflow distribution plate and a single battery which are sequentially and tightly attached together; and a reforming catalytic material is impregnated on the anode airflow distribution plate. According to the invention, the reforming catalytic material is impregnated on the surface of the anode gas flow distribution plate, the steam and desulfurized natural gas are preheated and then directly introduced into the galvanic pile, the reforming reaction of the gas is completed before the gas enters the anode reaction area, the reforming catalytic material can accelerate the reforming efficiency, the problem of anode carbon deposition can be effectively reduced, and the whole system is simplified.

Description

technical field [0001] The invention relates to the technical field of solid oxide fuel cells, in particular to an internal reforming solid oxide fuel cell stack. Background technique [0002] Solid oxide fuel cell (SOFC) 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. . SOFC works under high temperature conditions and has wide fuel selectivity. In addition to pure hydrogen, it also includes other hydrocarbon fuels such as natural gas and bio-oil. The anode material of SOFC is mainly Ni-containing cermets. Carbon deposition, damage to the anode structure. In order to prevent carbon deposition on the anode, the fuel is converted to H by external reforming before the fuel reacts in the cell. 2 And CO, when building an independent sy...

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Problems solved by technology

In order to prevent carbon deposition on the anode, the fuel is converted to H by external reforming before the fuel reacts in the cell. 2 And CO, when building an independent system, the independent reforming design increases the complexity of the system structure, and also reduces the overall energy utilization rate of the system

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