Solid oxide ammonia fuel cell

A solid oxide, fuel cell technology, used in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve the problems of reduced electrochemical performance, reduced ammonia decomposition performance, etc., to reduce thermal energy loss and improve electricity. Chemical properties, the effect of ensuring stable operation

Pending Publication Date: 2019-09-20
FUZHOU UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the decomposition performance of ammonia gas is significantly reduced below 600°C and the electrochemical performance is reduced, thereby providing a tubular solid oxide ammonia fuel cell

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] This embodiment provides a solid oxide ammonia fuel cell, the structure of which is as follows figure 1 as shown,

[0057] including housing 2;

[0058] An ammonia supply pipe 3 is arranged in the housing 2 along the axial direction of the housing 2, and the ammonia supply pipe 3 is filled with an ammonia decomposition catalyst to form an ammonia decomposition catalyst layer 4;

[0059] The fuel cell component 1 includes a tubular battery body with an open end, the battery body has an inner cavity 14 suitable for the ammonia supply pipe 3 to be inserted into the battery body from the open end, along the direction away from the inner cavity 14 Directionally, the battery body sequentially includes an anode layer 12, an electrolyte layer 11 and a cathode layer 13, so that ammonia gas enters the inner cavity 14 from the outlet end of the ammonia supply pipe 3 and contacts the anode layer 12;

[0060] The air channel 21 is arranged in the casing 2 to supply air into the ca...

Embodiment 2

[0071] This embodiment provides a solid oxide ammonia fuel cell, and the difference from Embodiment 1 is that the electrolyte layer used is a proton conductor electrolyte, and the structure is as follows figure 2 as shown,

[0072] including housing 2;

[0073] An ammonia supply pipe 3 is arranged in the housing 2 along the axial direction of the housing 2, and the ammonia supply pipe 3 is filled with an ammonia decomposition catalyst to form an ammonia decomposition catalyst layer 4;

[0074] The fuel cell component 1 includes a tubular battery body with an open end, the battery body has an inner cavity 14 suitable for the ammonia supply pipe 3 to be inserted into the battery body from the open end, along the direction away from the inner cavity 14 Directionally, the battery body sequentially includes an anode layer 12, an electrolyte layer 11 and a cathode layer 13, so that ammonia gas enters the inner cavity 14 from the outlet end of the ammonia supply pipe 3 and contacts...

Embodiment 3

[0086] This embodiment provides the working mode of the solid fuel cell provided in Embodiment 1 and Embodiment 2.

[0087] Ammonia enters the ammonia decomposition catalyst layer 4 from the ammonia supply pipe 3, decomposes into a 3:1 hydrogen-nitrogen mixture, and enters the inner cavity 14; air enters the reaction chamber 23 from the opening at the bottom of the housing 2 through the air channel 21 When reaching a certain temperature in the reaction chamber 23, the anode layer 14 and the cathode layer 15 of the fuel cell component 1 react as follows:

[0088] Embodiment 1 uses an oxygen ion conductor as the electrolyte layer, and the specific half-reaction is:

[0089] Anode: 2NH 3 +3O 2- =N 2 +3H 2 O+6e -

[0090] Cathode: 3 / 2O 2 +6e - =3O 2- ;

[0091] Embodiment 2 uses a proton conductor as the electrolyte layer, and the specific half-reaction is:

[0092] Anode: 2NH 3 =N 2 +6H + +6e -

[0093] Cathode: 3 / 2O 2 +6e - +6H + =3H 2 O.

[0094] After the ...

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Abstract

The invention discloses a solid oxide ammonia fuel cell. The solid oxide ammonia fuel cell comprises a shell, and further comprises an ammonia supply pipe, a fuel cell component and an air channel. An ammonia decomposition catalyst is placed in the ammonia supply pipe, and ammonia gas is decomposed in the ammonia decomposition catalyst layer for absorbing heat, so that a hydrogen-nitrogen mixed gas of 3: 1 is generated and better electrochemical performance at a relatively low temperature can be shown. After the fuel gas and the air are subjected to electrochemical reaction, heat is released, meanwhile, the tail gas is subjected to afterburning and then heat is released, and the residual ammonia gas in the tail gas is removed, the ammonia gas and the air to be reacted are preheated, so that the electrochemical reaction is promoted, the self-maintenance of the temperature is realized, an external heat source is not needed, and the stable operation of the battery can be ensured only through heat exchange.

Description

technical field [0001] The invention relates to the technical field of solid fuel cells, in particular to a solid oxide ammonia fuel cell. Background technique [0002] Solid Oxide Ammonia Fuel Cell (SOFC) is a new solid-state energy conversion device that converts the chemical energy stored in the fuel into electrical energy through high-temperature electrochemical reactions. It has high efficiency, no pollution, all-solid-state structure and Wide adaptability of a variety of fuel gases; at the same time, compared with wind energy, solar energy and other renewable energy sources, solid oxide ammonia fuel cells are not restricted by the geographical environment, and have stronger reliability and adaptability. [0003] The main research directions of solid oxide ammonia fuel cells are plate type and tube type. Among them, the volume power density of flat type solid oxide ammonia fuel cells is high, which is suitable for large-scale distributed power stations, while the tubula...

Claims

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Application Information

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IPC IPC(8): H01M8/04014H01M8/04082H01M8/04089H01M8/04701H01M8/0662H01M8/1007H01M8/22
CPCH01M8/0662H01M8/04022H01M8/04089H01M8/04201H01M8/04708H01M8/1007H01M8/22Y02E60/50
Inventor 江莉龙罗宇陈崇启詹瑛瑛
Owner FUZHOU UNIVERSITY
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