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Method and device for producing hydrogen by using chemical chain

A chemical chain and oxide technology, which is applied in the field of chemical chain hydrogen production method and its device, can solve the problems such as few reports, and achieve the effect of avoiding dilution, stable structure and good oxygen supply capacity

Inactive Publication Date: 2011-09-28
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although there have been reports on chemical looping combustion, there are few reports on methods and devices for producing hydrogen by chemical chain reaction using perovskite oxides as oxygen carriers.

Method used

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  • Method and device for producing hydrogen by using chemical chain
  • Method and device for producing hydrogen by using chemical chain
  • Method and device for producing hydrogen by using chemical chain

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]Choose methane as the fuel gas; LaFeO3 as the oxygen carrier, the average particle size is 0.5mm; the inner diameter of the bubbling fluidized bed 4 and 7 reaction section is 300mm, the inner diameter of the expansion section is 500mm, and the height is 1200mm; the inner diameter of the entrained bed 1 is 100mm, the height 2000mm, the initial oxygen carrier addition is 30-40Kg, and fresh oxygen carrier can be added to the bubbling fluidized bed 4 at any time according to the reaction progress. The temperature of the bubbling fluidized bed 4 is stabilized between 880°C and 900°C, and the generated gas product passes through the cyclone separator and then enters the condensation device for separation and purification; the temperature of the bubbling fluidized bed 7 is stable at 800°C to 830°C Between ℃, the gas is discharged from the top and then enters the condensing device for separation and purification after passing through the cyclone separator; the temperature of the ...

Embodiment 2

[0036] Since the operation process and operating device of each embodiment are the same, the specific implementation process is the same as that of Embodiment 1, and will not be repeated here. Only the implementation conditions and implementation results are listed in the table below.

[0037]

Embodiment 3

[0039] Since the operation process and operating device of each embodiment are the same, the specific implementation process is the same as that of Embodiment 1, and will not be repeated here. Only the implementation conditions and implementation results are listed in the table below.

[0040]

[0041]

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PUM

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Abstract

The invention provides a method and device for producing hydrogen by using a chemical chain. In the method, perovskite type oxide is selected to serve as an oxygen carrier; a main body structure of the device comprises a fuel reactor, a water vapor reactor and an air reactor. Fuel and the oxygen carrier undergo a chemical chain combustion reaction in the fuel reactor to generate CO2 and H2O; oxygen elements required by the fuel are from lattice oxygen of the oxygen carrier; the reduced oxygen carrier is delivered to the water vapor reactor to react with high-temperature water vapor, restore part of lattice oxygen and simultaneously generate H2; the oxygen carrier is delivered to the air reactor to react with high-temperature air to be further oxidized and completely restore the lattice oxygen; the oxygen carrier is carried to a cyclone separator by high-speed air current; gas is emptied; and the oxygen carrier is delivered again to the fuel reactor to be recycled. According to the method and device, the automatic separation of CO2 is realized when pure H3 is produced and the emission of greenhouse gas is avoided. The oxygen carrier has the advantages of sable structure, favorable oxygen loss and supply capabilities and long service life.

Description

technical field [0001] The invention relates to the technical fields of functional materials, energy conversion and environmental protection, in particular to a chemical chain hydrogen production method and a device thereof. technical background [0002] In the near future, hydrogen energy will become the main way for human beings to utilize energy, and human beings will establish an energy utilization economic model with hydrogen energy as the mainstay. The advantages of hydrogen as a fuel are obvious. First, hydrogen is the cleanest, renewable fuel available. The product of chemical combustion is water, and some nitrogen oxides are only formed when the flame temperature is very high. Only water is produced during electrochemical combustion, without the pollutants produced during the combustion of fossil fuels. In addition to being used as fuel, hydrogen is also an important chemical raw material in modern industrial production, especially in fertilizers, petrochemicals,...

Claims

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Application Information

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IPC IPC(8): C01B3/02C01B3/06C01B31/20C01B32/50
CPCY02E60/36
Inventor 何方李新爱李海滨赵坤黄振赵增立
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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