Ammonia decomposition catalyst structure and fuel cell

Abstract

The purpose of the present invention is to provide an ammonia decomposition catalyst structure which favorably maintains catalyst activity by suppressing aggregation of catalyst particles and which enables an efficient decomposition reaction of ammonia into hydrogen, and a fuel cell using said catalyst structure. This ammonia decomposition catalyst structure, used to decompose ammonia and generatehydrogen, is characterized by being provided with a carrier of a porous structure configured from a zeolite compound, and at least one catalytic material present in the carrier, wherein the carrier has passages that communicate with each other, the catalytic material is metal microparticles and is present at least in the passages of the carrier.

Description

technical field [0001] The present invention relates to an ammonia decomposition catalyst structure and a fuel cell. Background technique [0002] In recent years, the use of hydrogen as a clean energy source has attracted attention from the viewpoint of environmental protection. For example, a method of recovering hydrogen from ammonia generated from organic waste, and the development of fuel cell vehicles using hydrogen as fuel are actively progressing. Although hydrogen is preferable as a clean energy source, it requires a large volume for storage, and especially when it is used as a raw material of an automotive fuel cell, the method of supplying hydrogen to the fuel cell becomes a problem. As a method of solving this problem, a method of storing hydrogen in the state of liquefied ammonia and producing hydrogen by catalytic decomposition of vaporized ammonia has recently attracted attention. [0003] Usually, the decomposition reaction of ammonia (2NH 3 →3H 2 +N 2 ) ...

AI Technical Summary

Problems solved by technology

However, in the decomposition reaction of these materials in a high-temperature environment of 800°C or higher, there is a problem that the carrier and the supported metal tend to aggregate (hereinafter, sometimes referred to as "thermal aggregation"), and the catalytic activity decreases.

However, in such a method, although NH 3 However, the catalytically active metal particles are directly attached to the surface of the substrate. Therefore, the aggregation of the catalytically active metal particles cannot be sufficiently suppressed, and the reduction of catalytic activity and the improvement of durability (extended life) have not yet been achieved.

Images