Chemical chain hydrogen production device and method based on iron-based oxygen carrier graded reduction

Abstract

The invention discloses a chemical chain hydrogenation device and a chemical chain hydrogenation method based on iron-based oxygen carrier graded reduction. The device is a circulation loop composed of an air reactor, a cyclone separator, a reduction reactor, a fuel reactor, a return feeder, a steam reactor, and an isolator. According to the method, a Fe3O4-state iron-based oxygen carrier is oxidized into a Fe2O3-state iron-based oxygen carrier with air in the air reactor; separation is carried out in the cyclone separator; the Fe2O3-state iron-based oxygen carrier enters the reduction reactor, and is reduced into Fe3O4-state iron-based oxygen carrier with weakly reductive gas; the Fe3O4-state iron-based oxygen carrier enters the fuel reactor through a discharge pipe of the reduction reactor, and is reduced to FeO-state iron-based oxygen carrier with a gaseous fuel; the FeO-state iron-based oxygen carrier enters the steam reactor through the return feeder, and is subjected to a reaction with steam, such that the FeO-state iron-based oxygen carrier is converted into a Fe3O4-state iron-based oxygen carrier, and at a same time hydrogen is produced and is discharged through a hydrogen discharge pipe of the steam reactor; the Fe3O4-state iron-based oxygen carrier enters the air reactor through the isolator, and is subjected to an oxidation reaction with air, such that the regeneration of the Fe2O3-state iron-based oxygen carrier is completed.

Description

technical field

[0001] The invention relates to a gas fuel chemical chain hydrogen production device and method, in particular to realize the grading reduction of iron-based oxygen carriers, improve the hydrogen production efficiency and gas fuel conversion efficiency, and achieve a chemical chain hydrogen production device for separating carbon dioxide in the hydrogen production process and methods. Background technique

[0002] Chemical chain hydrogen production is a new type of hydrogen production technology. Gas fuel is not directly contacted with water vapor to produce hydrogen through water-gas shift reaction, but alternates between air reactor, fuel reactor and steam reactor through oxygen carrier. The oxidation-reduction reaction realizes the transfer of oxygen and the hydrogen production reaction, and completes the conversion of chemical energy of gas fuel. The principle is: the oxygen carrier in the oxidized state undergoes a reduction reaction with the gaseous fu...

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