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Hydrogen manufacturing method implemented by using iron-based oxide through enhancement of magnetic field

An iron-based oxide, magnetic field strengthening technology, applied in the production of hydrogen and other directions, can solve the problems of reducing the surface activity of metal oxide particles, metal oxides cannot be recycled, and cannot be applied in industrial production, etc., to improve the reactivity of materials, The effect of increasing the number of cycles and improving the utilization rate

Active Publication Date: 2014-05-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The existing hydrogen production technologies include: hydrogen production by electrolysis of water, hydrogen production by pyrolysis, hydrogen production by hydrolysis of metal oxides, photochemical hydrogen production, hydrogen production by radioactive hydrolysis, hydrogen production by plasma electrochemical method and biological hydrogen production, among which the existing The iron-based oxide hydrogen production method in the technology has severe iron sintering during the reaction process, which is not conducive to recycling, and thus cannot be applied to industrial production
[0003] During the hydrogen production process of iron-based metal oxides, the aggregation and sintering of iron particles will reduce the surface activity of metal oxide particles, so that the iron-based metal oxides cannot be recycled

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The method for producing hydrogen from a magnetic field-enhanced iron-based oxide has the following specific steps:

[0020] (1) Reduction reaction of iron-based oxides: Under a magnetic field of 75 gauss (stable magnetic field), raise the temperature of 100g of iron-based oxides to 850°C, and then introduce a mixture of reducing gas and carrier gas with a flow rate of 500ml / min The gas reduction reaction was 3h to obtain the iron reduction product, in which the iron-based oxide was Fe 3 o 4 , the particle size is 20~40 mesh, the reducing gas is CH 4 , the carrier gas is N 2 , CH 4 with N 2 The volume ratio is 20:80, during this process CH 4 Oxidized to CO 2 with H 2 O mixed gas;

[0021] (2) Hydrogen production method: under a magnetic field of 75 gauss, the flow rate of 1.8 cm into the iron reduction product obtained in step (1) is 3 / min oxidizing gas and 500ml / min nitrogen carrier gas were reacted for 1 h to obtain hydrogen and regenerated iron-based oxides...

Embodiment 2

[0024] The method for producing hydrogen from a magnetic field-enhanced iron-based oxide has the following specific steps:

[0025] (1) Reduction reaction of iron-based oxides: Under a magnetic field of 75 gauss (stable magnetic field), raise the temperature of 100g of iron-based oxides to 850°C, and then pass in a mixed gas consisting of reducing gas and carrier gas with a flow rate of 500ml / min The reduction reaction was 3h to obtain the iron reduction product, and the iron-based oxide was CeFeO 3 Powder, particle size is 20~40 mesh, reducing gas is CH 4 , the carrier gas is N 2 , CH 4 with N 2 The volume ratio is 15:85, during which CH 4 Oxidation to CO and H 2 O mixed gas;

[0026] (2) Hydrogen production method: under a magnetic field of 75 gauss, the flow rate of 1.8 cm into the iron reduction product obtained in step (1) is 3 / min water vapor oxidation gas and 500ml / min nitrogen carrier gas were reacted for 1h to obtain hydrogen and regenerated iron-based oxides....

Embodiment 3

[0029] The method for producing hydrogen from a magnetic field-enhanced iron-based oxide has the following specific steps:

[0030] (1) Reduction reaction of iron-based oxides: Under a magnetic field of 75 gauss (stable magnetic field), raise the temperature of 100g of iron-based oxides to 900°C, and then pass in a mixed gas consisting of reducing gas and carrier gas with a flow rate of 500ml / min The reduction reaction was 5h to obtain the iron reduction product, wherein the iron-based oxide was Fe 3 o 4 , the particle size is 20~40 mesh, the reducing gas is synthesis gas, the volume ratio of synthesis gas to nitrogen is 40:60, H 2 The molar ratio with CO is 2:1, and the carrier gas is nitrogen;

[0031] (2) Hydrogen production method: under a magnetic field of 75 gauss, the flow rate of 1.8 cm into the iron reduction product obtained in step (1) is 3 / min water vapor oxidation gas and 500ml / min carrier gas react for 3h to obtain hydrogen and regenerated iron-based oxides. ...

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Abstract

The invention relates to a hydrogen manufacturing method implemented by using an iron-based oxide through the enhancement of a magnetic field, and belongs to the technical fields of energy chemistry and material preparation. The method comprises the following steps: firstly, heating the iron-based oxide to 700-1000 DEG C in the magnetic field; then, feeding a gas mixture of reduction gas and carrier gas into the iron-based oxide to have a reduction reaction, so that an iron reduction product is obtained; finally, in the magnetic field, feeding oxidizing gas and flow carrier gas into the iron reduction product obtained in the previous step to react, so that hydrogen and a regenerated iron-based oxide are obtained. According to the method, a previous thought of improving the reactivity by adding dopants based on iron-based oxides is changed, the reactivity of materials is furthest improved by using the enhancement of the magnetic field, and the activity of metal particles is kept, so that the iron-based oxide can be cyclically utilized, and the number of cycling times is greatly increased, therefore, the method breaks the limitations of hydrogen manufacturing in laboratories.

Description

technical field [0001] The invention relates to a method for producing hydrogen from a magnetic field-strengthened iron-based oxide, belonging to the technical fields of energy chemistry and material preparation. Background technique [0002] The existing hydrogen production technologies include: hydrogen production by electrolysis of water, hydrogen production by pyrolysis, hydrogen production by hydrolysis of metal oxides, photochemical hydrogen production, hydrogen production by radioactive hydrolysis, hydrogen production by plasma electrochemical method and biological hydrogen production, among which the existing The iron-based oxide hydrogen production method in the technology has severe iron sintering during the reaction process, which is not conducive to recycling, and thus cannot be applied to industrial production. [0003] During the hydrogen production process of iron-based metal oxides, the aggregation and sintering of iron particles will reduce the surface activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/02
Inventor 祝星孙令玥郑燕娥王华魏永刚李孔斋胡建杭
Owner KUNMING UNIV OF SCI & TECH