Preparation method of oxygen carrier barium cobalt ferrite

A technology of barium iron cobaltate and oxygen carrier, which is applied in chemical instruments and methods, cobalt compounds, petroleum industry, etc., can solve the problems of difficult promotion and use, high cost, etc., and achieve uniform reaction, easy control, low cost, The effect of high circulation activity

Active Publication Date: 2017-11-24
东营睿港招商服务有限责任公司
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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of oxygen carrier barium iron cobaltate, comprising the steps of:

[0024] 1) with Ba(NO3)2, Fe(NO3)3, Co(NO3)2 as raw materials, prepare corresponding nitrate aqueous solution respectively, the concentration of described aqueous solution is 0.02mol / L;

[0025] 2) According to the ratio of molar ratio Ba2+: Fe3+: Co2+=1:0.5:0.5, the nitrate aqueous solution is mixed, stirred evenly, then add complexing agent citric acid, the total amount of the citric acid and the metal cation The molar ratio of the solution is 5:1, then add ammonia water, control the pH of the system to be 8, heat to 50°C and slowly stir, react for 4 hours to obtain a sol;

[0026] 3) Freeze-drying the sol, wherein the freeze-drying conditions are as follows: a vacuum degree of 10-5Pa, a temperature of -35°C, and a freezing time of 36 hours to obtain a gel;

[0027] 4) The dry gel is placed in a microwave heating container, and the microwave heating container is turned on to induc...

Embodiment 2

[0029] A preparation method of oxygen carrier barium iron cobaltate, comprising the steps of:

[0030] 1) with Ba(NO3)2, Fe(NO3)3, Co(NO3)2 as raw materials, prepare corresponding nitrate aqueous solution respectively, the concentration of described aqueous solution is 0.04mol / L;

[0031] 2) According to the ratio of molar ratio Ba2+: Fe3+: Co2+=1:0.7:0.3, the nitrate aqueous solution is mixed, stirred evenly, then add complexing agent ethylenediaminetetraacetic acid, described ethylenediaminetetraacetic acid and the The molar ratio of the total amount of metal cations is 5:1, and then add ammonia water, control the pH of the system to be 9, heat to 45° C. and slowly stir, and react for 4 hours to obtain a sol;

[0032] 3) Freeze-drying the sol at -35°C for 30 hours under vacuum to obtain a gel;

[0033] 4) Place the dry gel in a microwave heating container, turn on the microwave heating container, burn the dry gel for 23 seconds, and obtain the oxygen carrier barium iron cob...

Embodiment 3

[0035] A preparation method of oxygen carrier barium iron cobaltate, comprising the steps of:

[0036] 1) with Ba(NO3)2, Fe(NO3)3, Co(NO3)2 as raw materials, prepare corresponding nitrate aqueous solution respectively, the concentration of described aqueous solution is 0.05mol / L;

[0037] 2) According to the ratio of molar ratio Ba2+: Fe3+: Co2+=1:0.4:0.6, the nitrate aqueous solution is mixed, stirred evenly, then add complexing agent citric acid and ethylenediaminetetraacetic acid, wherein, citric acid and ethylenediaminetetraacetic acid The mol ratio of diamine tetraacetic acid is 7: 1, and the mol ratio of described complexing agent and the total amount of metal cation is 5: 1, then add ammoniacal liquor, the pH of control system is 8, is heated to 50 ℃ and Stir slowly, and react for 5 hours to obtain a sol;

[0038] 3) Freeze-drying the sol at -35°C for 25 hours under vacuum to obtain a gel;

[0039] 4) Place the dry gel in a microwave heating container, open the microw...

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PUM

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Abstract

The invention discloses a preparation method of an oxygen carrier barium cobalt ferrite. The preparation method 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; freeze drying, 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 cobalt ferrite with high circulating activity and high stability. The prepared oxygen carrier barium cobalt 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 a 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 cobalt 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 iron cobaltate. 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 emissio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/00C01G51/00
CPCC01G51/66C10L10/00
Inventor 王大龙
Owner 东营睿港招商服务有限责任公司
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