Ammonia decomposition device, ammonia decomposition system and hydrogen production method

Abstract

The invention belongs to the technical field of hydrogen production, and concretely relates to an ammonia decomposition device, an ammonia decomposition system and a hydrogen production method. The ammonia decomposition device comprises a shell, a heating zone, a heat exchange zone, a reaction section and a heat exchange coil. The heat exchange coil is spirally wound around the outer wall of the reaction section to sufficiently heat ammonia gas, so the heating efficiency of ammonia gas is increased; a first reaction section and a second reaction section which are sequentially communicated arearranged in the reaction section to ensure that the ammonia gas is decomposed after entering the first reaction section in order to generate a nitrogen and hydrogen mixture, so the decomposition efficiency of the ammonia gas is increased; and the second reaction section can perform secondary decomposition on the residual ammonia gas in the nitrogen and hydrogen mixture produced in the first reaction section, so the residual amount of ammonia gas in the nitrogen and hydrogen mixture in the second reaction section is reduced, thereby the ammonia gas is decomposed more thoroughly. The device makes the conversion rate of ammonia gas reach 99.9% or more and the residual amount of ammonia gas in the nitrogen and hydrogen mixture less than 1000 ppm.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production, and in particular relates to an ammonia decomposition device and system and a hydrogen production method. Background technique [0002] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy, also known as an electrochemical generator. It is the fourth power generation technology after hydropower, thermal power and atomic power. Since the fuel cell converts the Gibbs free energy in the chemical energy of the fuel into electrical energy through an electrochemical reaction, it is not limited by the Carnot cycle effect, so the efficiency is high. In addition, fuel cells and oxygen are used as raw materials, and there are no mechanical transmission parts, no noise pollution, and less harmful gas emissions. It can be seen that from the perspective of saving energy and protecting the ecological environment, fuel cells have good developmen...

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of incomplete ammonia decomposition and high residual ammonia in gas products in the prior art, so as to provide an ammonia decomposition device and system and an ammonia decomposition method

Images