Fluidized bed electrode solid oxide fuel cell device

Abstract

The invention belongs to the field of solid oxide fuel cells, and particularly relates to a fluidized bed electrode solid oxide fuel cell device. The Fluidized bed electrode solid oxide fuel cell device adopts a circulating fluidized bed, a cyclone separator, a bubbling fluidized bed and a solid oxide fuel cell to form a serial fluidized bed solid oxide fuel cell device. The fluidized bed device increases an electrochemical reaction interface of an anode, enhances the heat transfer and mass transfer rate of an electrode, and improves the carbon deposition resistance of the anode. Fuel gas is subjected to a combustion reaction in the circulating fluidized bed and is subjected to an electrochemical reaction in the bubbling fluidized bed, and combustion is used for providing heat for starting the fuel cell and transferring the heat through the electrode particles, so that the investment of a complex combustion device is avoided, the starting speed of the fuel cell is increased, and the safety of the device is enhanced.

Description

technical field [0001] The invention relates to the technical field of solid oxide fuel cells, in particular to a fluidized bed electrode solid oxide fuel cell device. Background technique [0002] With the sustained and rapid development of the national economy, the clean and efficient utilization of energy has become a very urgent issue. The traditional energy conversion method is mainly thermal power generation. This method first converts the chemical energy of the fuel into thermal energy, and then into mechanical energy and electrical energy. Due to the limitation of the Carnot cycle, its power generation efficiency only reaches about 40%. Fuel cells are considered to be the fourth power generation technology after hydropower, thermal power and atomic power. It can reach 50%-70%; when using clean energy such as hydrogen as fuel gas, zero pollution of the product can be realized, and it has broad application prospects. [0003] As a kind of fuel cell, solid oxide fuel ...

AI Technical Summary

Problems solved by technology

Due to the large temperature difference from the ambient temperature to the start-up temperature, and in order to reduce the thermal stress caused by the uneven temperature distribution of the various components of the fuel cell during heating, the solid oxide fuel cell usually requires a long start-up time and a relatively complicated process. external heating device

During the start-up and working process of solid oxide fuel cells, the heat of external heating is not fully utilized, which reduces the overall energy conversion efficiency of the device.

[0004] In addition, when the fuel gas is a carbon-containing fuel such as methane, the fuel is prone to self-decomposition and disproportionation reaction of carbon monoxide at high temperature, resulting in carbon deposition on the anode of the solid oxide fuel cell, which not only reduces the porosity of the anode, but also deposits on the The active site of the anode catalyst reduces the activity and reaction stability of the anode catalyst, reduces the conductivity, and degrades the performance of the battery

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