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Method for producing hydrogen by using solar isothermal decomposition water on basis of oxygen carrier

A technology of solar energy and water splitting, applied in hydrogen production, energy input, etc., can solve problems such as reduced heat utilization efficiency, reduced material activity, and insufficient heat, and achieve the effects of avoiding heat loss and improving cycle performance

Inactive Publication Date: 2015-09-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] (1) Due to the large temperature difference in the two-step reaction, heat loss often occurs during the heating and cooling process of the oxygen carrier, which greatly reduces the heat utilization efficiency;
[0011] (2) Irreversible heat loss leads to a reduction in the activity of the material, and the heat required to reheat the material to the active point is insufficient;

Method used

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  • Method for producing hydrogen by using solar isothermal decomposition water on basis of oxygen carrier
  • Method for producing hydrogen by using solar isothermal decomposition water on basis of oxygen carrier
  • Method for producing hydrogen by using solar isothermal decomposition water on basis of oxygen carrier

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Embodiment 1

[0040] The method for isothermally decomposing water to produce hydrogen based on oxygen carriers using solar energy, the specific steps are as follows:

[0041] (1) Using the Atomic Layer Deposition (ALD) method, CoO and Fe with a mass ratio of 1:1 2 o 3 Continuous deposition of Al in a fluidized bed reactor 2 o 3 On the skeleton carrier, obtain CoFe 2 o 4 -Al 2 o 3 Material; CoFe 2 o 4 -Al 2 o 3 CoFe in material 2 o 4 17% of the total mass;

[0042] (2) CoFe prepared in step (1) 2 o 4 -Al 2 o 3 The material is placed in the heating reaction furnace, and the integrated solar heat is used to heat the reaction furnace to control the temperature in the furnace to 1350°C, and the carrier gas is passed into the heating reaction furnace until the reaction tail gas is qualitatively and quantitatively analyzed by mass spectrometry and gas chromatography. O detected 2 So far, the reaction equation in this process is shown in formula ①,

[0043] CoFe 2 o 4 + 3Al ...

Embodiment 2

[0048] The method for isothermally decomposing water to produce hydrogen based on oxygen carriers using solar energy, the specific steps are as follows:

[0049] (1) Using the Atomic Layer Deposition (ALD) method, CoO and Fe with a mass ratio of 1:3 2 o 3 Continuous deposition of Al in a fluidized bed reactor 2 o 3 On the skeleton carrier, obtain CoFe 2 o 4 -Al 2 o 3 Material; CoFe 2 o 4 -Al 2 o 3 CoFe in material 2 o 4 25% of the total mass;

[0050] (2) CoFe prepared in step (1) 2 o 4 -Al 2 o 3 The material is placed in the heating reaction furnace, and the integrated solar heat is used to heat the reaction furnace to control the temperature in the furnace to 1600°C, and the carrier gas is passed into the heating reaction furnace until the reaction tail gas is qualitatively and quantitatively analyzed by mass spectrometry and gas chromatography. O detected 2 So far, the reaction equation in this process is shown in formula ①,

[0051] CoFe 2 o 4 + 3Al ...

Embodiment 3

[0056] The method for isothermally decomposing water to produce hydrogen based on oxygen carriers using solar energy, the specific steps are as follows:

[0057] (1) Using the Atomic Layer Deposition (ALD) method, CoO and Fe with a mass ratio of 2:1 2 o 3 Continuous deposition of Al in a fluidized bed reactor 2 o 3 On the skeleton carrier, obtain CoFe 2 o 4 -Al 2 o 3 Material; CoFe 2 o 4 -Al 2 o 3 CoFe in material 2 o 4 20% of the total mass;

[0058] (2) CoFe prepared in step (1) 2 o 4 -Al 2 o 3 The material is placed in the heating reaction furnace, and the integrated solar heat is used to heat the reaction furnace to control the temperature in the furnace to 1400°C, and the carrier gas is passed into the heating reaction furnace until the reaction tail gas is qualitatively and quantitatively analyzed by mass spectrometry and gas chromatography. O detected 2 So far, the reaction equation in this process is shown in formula ①,

[0059] CoFe 2 o 4 + 3Al ...

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Abstract

The invention relates to a method for producing hydrogen by using solar isothermal decomposition water on the basis of an oxygen carrier, and belongs to the technical field of energy catalyzing and new energy. The method for producing the hydrogen by using the solar isothermal decomposition water on the basis of the oxygen carrier comprises the following steps of acquiring a CoFe2O4-Al2O3 material by using an atomic layer deposition (ALD) method; placing the prepared CoFe2O4-Al3O3 material in a heating reaction furnace; using integrated solar heat in the heating reaction furnace; feeding carrier gas to the heating reaction furnace until O2 cannot be detected from reaction tail gas; keeping the temperature unchanged; changing the carrier gas into mixed gas consisting of water vapor and the carrier gas under the condition that the volume ratio of the water vapor to the carrier gas is 1:3-3:2; performing reaction until H2 cannot be detected from the tail gas after the tail gas is qualitatively and quantitatively analyzed through a mass spectrum and a gas chromatography; and repeating the above steps to continuously produce the hydrogen. By the method for producing the hydrogen by using the solar isothermal decomposition water on the basis of the oxygen carrier, the original technology for producing the hydrogen by using variable-temperature decomposition water is broken through.

Description

technical field [0001] The invention relates to a method for isothermally decomposing water to produce hydrogen based on an oxygen carrier using solar energy, and belongs to the technical field of energy catalysis and new energy. Background technique [0002] Energy and the environment are two major themes today, and they are the main factors that determine the healthy and rapid development of society. my country's energy and environment are facing many problems: excessive energy consumption, serious energy shortage, severe environmental pollution, and the carrying capacity of the environment is approaching its limit. The relationship between energy and the environment is complementary and coordinated with each other, rather than opposing each other, and the relationship between the two must be well coordinated. Only in this way can we better implement the requirements and hopes for the construction of ecological civilization since the 18th National Congress of the Communis...

Claims

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Application Information

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IPC IPC(8): C01B3/04
CPCY02E60/36Y02P20/133
Inventor 王华翟康李孔斋祝星魏永刚郑敏施从志曾良鹏
Owner KUNMING UNIV OF SCI & TECH