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A kind of preparation method of oxygen carrier barium ferrite

A barium ferrite, oxygen carrier technology, applied in chemical instruments and methods, iron compounds, fuel additives, etc., can solve the problems of high cost, difficult to implement and use, achieve low cost, uniform reaction and easy control, Simple to use effects

Active Publication Date: 2019-04-05
绍兴市吧琦科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of CCS is relatively high, which brings a huge economic burden to enterprises. Therefore, its promotion and use have always been difficult to implement.

Method used

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  • A kind of preparation method of oxygen carrier barium ferrite
  • A kind of preparation method of oxygen carrier barium ferrite

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation method of oxygen carrier barium ferrite, comprising the steps of:

[0023] 1) with Ba(NO3)2, Fe(NO3)3 as raw material, prepare corresponding nitrate aqueous solution respectively, the concentration of described aqueous solution is 0.02mol / L;

[0024] 2) According to the ratio of molar ratio Ba2+: Fe3+=1:1, the nitrate aqueous solution is mixed, stirred evenly, then add complexing agent citric acid, the molar ratio of the total amount of the citric acid and the metal cation is 5:1, then add ammonia water, control the pH of the system to 8, heat to 40°C and slowly stir, react for 5 hours to obtain a sol;

[0025] 3) Evaporating the sol at 90° C. until a xerogel is formed;

[0026] 4) The dry gel is placed in a microwave heating container, and the microwave heating container is turned on to induce combustion. The dry gel is burned for 20 seconds, and the oxygen carrier barium ferrite BaFeO3 is obtained after the combustion is completed.

Embodiment 2

[0028] A preparation method of oxygen carrier barium ferrite, comprising the steps of:

[0029] 1) with Ba(NO3)2, Fe(NO3)3 as raw material, prepare corresponding nitrate aqueous solution respectively, the concentration of described aqueous solution is 0.04mol / L;

[0030] 2) According to the ratio of molar ratio Ba2+: Fe3+=1:1, the nitrate aqueous solution is mixed, stirred evenly, then add complexing agent citric acid, the molar ratio of the total amount of the citric acid and the metal cation is 7:1, then add ammonia water, control the pH of the system to 8.3, heat to 60°C and slowly stir, react for 4 hours to obtain a sol;

[0031] 3) Evaporating the sol at 80° C. until a xerogel is formed;

[0032] 4) The dry gel is placed in a microwave heating container, and the microwave heating container is turned on to induce combustion. The dry gel is burned for 10 seconds, and the oxygen carrier barium ferrite BaFeO3 is obtained after the combustion is completed.

Embodiment 3

[0034] A preparation method of oxygen carrier barium ferrite, comprising the steps of:

[0035] 1) with Ba(NO3)2, Fe(NO3)3 as raw material, prepare corresponding nitrate aqueous solution respectively, the concentration of described aqueous solution is 0.04mol / L;

[0036] 2) According to the ratio of molar ratio Ba2+: Fe3+=1:1, the nitrate aqueous solution is mixed, stirred evenly, then add complexing agent citric acid, the molar ratio of the total amount of the citric acid and the metal cation is 6:1, then add ammonia water, control the pH of the system to 9, heat to 60°C and stir slowly, react for 4 hours to obtain a sol;

[0037] 3) Evaporating the sol at 85° C. until a xerogel is formed;

[0038] 4) The dry gel is placed in a microwave heating container, and the microwave heating container is turned on to induce combustion. The dry gel is burned for 30 seconds, and the oxygen carrier barium ferrite BaFeO3 is obtained after the combustion is completed.

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Abstract

The invention discloses a preparation method of oxygen carrier barium ferrite. Specifically, a sol-gel method and a microwave-induced combustion method are combined, so as to prepare the barium ferrite. The preparation method specifically comprises the following steps of firstly, by using corresponding nitrate water solution as a raw material, fully mixing, adding a complexing agent, generating complexing reaction with metal ions, and controlling reaction conditions, so as to obtain sol; evaporating, so as to obtain gel; finally, performing microwave-induced combustion on the gel to generate self-combustion reaction, so as to obtain the oxygen carrier barium ferrite with high circulating activity and high stability. The prepared oxygen carrier barium ferrite has the advantages that the chemical composition is accurate and is consistent with a proportional ratio; the components can be easily and accurately controlled; in the process of preparing the gel by the sol-gel method, the cost is low, the operation is simple, the gel component is uniform, a self-combustion method is adopted, the self-combustion reaction is uniform and easy to control, and components of a barium ferrite product are uniform; the whole preparation technology is simple, the product shape is regular, the size is uniform, the circulating activity is high, the stability is high, and the property is excellent.

Description

technical field [0001] The invention relates to a preparation method of an oxygen carrier, in particular to a preparation method of an oxygen carrier barium ferrite. Background technique [0002] With the rapid growth of population, the continuous deepening of industrialization and the increasing demand for energy, electricity generation based on fossil fuels not only meets the energy demand, but also brings great environmental hazards. The emitted CO2 is the main greenhouse gas. Due to the increase in energy consumption, the concentration of CO2 in the atmosphere is also increasing, and the global temperature is gradually increasing. Therefore, how to reduce CO2 emissions from the combustion of fossil fuels has drawn close attention from the international community. [0003] Among them, CO2 recovery and storage (CCS) in the process of coal and other fossil fuel power production is the most effective way, which can achieve the goal of effectively reducing CO2 emissions in a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L10/00C01G49/00
CPCC01G49/0081C10L10/00
Inventor 王大龙
Owner 绍兴市吧琦科技有限公司