Direct methane dry reforming power generation method based on symmetrical double-cathode structure solid oxide fuel cell

Abstract

The invention provides a direct methane dry reforming power generation method based on a symmetric double-cathode structure solid oxide fuel cell. The cell takes an anode layer as a supporting electrode layer, and an electrolyte layer and a cathode layer are stacked up and down along the thickness direction to form a symmetric structure; the cell is heated by a heating unit, so that the temperature of the cell is more than 650 DEG C in the operation process of the cell, a mixed gas of carbon dioxide and methane is introduced into a pore channel of the anode layer, and air is introduced into the cathode layer, so that methane dry reforming can be directly carried out in the cell, and direct and efficient utilization of methane in the solid oxide fuel cell is realized; and the method has the advantages of simple and easily-controlled operation conditions, low cost, safety, high efficiency and good reaction selectivity.

Description

technical field [0001] The invention belongs to the field of electrochemical technology and high-temperature solid oxide fuel cells, and specifically relates to a direct methane dry reforming power generation method based on a symmetrical double-cathode structure solid oxide fuel cell. Background technique [0002] Since the industrial revolution, global energy consumption has shown a rising trend. Environmental pollution and global climate change have aroused widespread concern. Governments around the world have focused on finding new clean energy and developing clean and efficient solutions for existing energy. Support, and the fuel cell stands out among many solutions because of its reaction process without combustion, not limited by the Carnot cycle, and high energy conversion efficiency. Among them, the solid oxide fuel cell (SOFC) has become the successor due to its adaptability to various hydrocarbon gases such as hydrogen, methane, coal gas and biomass fuel because i...

AI Technical Summary

Problems solved by technology

However, the problem of carbon deposition on the Ni-YSZ anode often occurs, and the carbon deposition on the anode will not only cause the loss of the active area of ​​the anode, but also reduce the performance and life of the battery

In addition, another problem is the thermal stress caused by the uneven temperature distribution on the SOFC, because the methane dry reforming reaction in the internal reforming process is an endothermic reaction with an increase in volume, and its endothermic intensity is very large, and the endothermic dry The reforming reaction is much faster than the exothermic electrochemical process, which causes large thermal stress inside the anode, making it difficult to achieve 100% internal reforming

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