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Perovskite type oxide, preparation method thereof and application of perovskite type oxide in preparation of carbon monoxide

A perovskite type and carbon monoxide technology, applied in the direction of carbon monoxide, can solve the problems of complex gas products, slow reaction rate, large demand, etc., and achieve the effect of increasing oxygen capacity, high selectivity, and improving thermal stability

Pending Publication Date: 2022-07-01
HUAZHONG UNIV OF SCI & TECH
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  • Claims
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Problems solved by technology

Both have some shortcomings, such as steam coal gasification has a large demand for water resources, which is not suitable for water-shortage areas, and the gas products are very complex, requiring multiple subsequent processing steps before they can be used for further production; using oxygen as a gasification agent requires The cost of separating oxygen from air is high, and the mixture of oxygen and coal powder is prone to explosion hazards; the reaction rate of using carbon dioxide as a gasification agent is slow, and catalysts are required to improve process efficiency

Method used

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  • Perovskite type oxide, preparation method thereof and application of perovskite type oxide in preparation of carbon monoxide
  • Perovskite type oxide, preparation method thereof and application of perovskite type oxide in preparation of carbon monoxide

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preparation example Construction

[0034] The preparation method of a perovskite oxide provided in the embodiment of the present invention, such as figure 1 shown, including the following steps:

[0035] S1. Prepare its nitrate solution according to the molar ratio of Ba and Mn metal ions of 1:1, and then add citric acid to the nitrate solution to obtain BaMnO 3 A mixed solution of components.

[0036] S2. Add CeO to the mixed solution 2 powder carrier material, and stir evenly; then add attapulgite powder carrier material to the mixed solution, and disperse evenly to obtain a mixture;

[0037] S3, the mixture is calcined and then granulated, which specifically includes the following steps:

[0038] S31, drying the mixture, then calcining the mixture, and grinding the calcined product to obtain a powdered oxygen carrier material;

[0039] S32. Slowly add deionized water to the powdered oxygen carrier material, and at the same time fully stir with a glass rod, until the material is a plastic viscous solid, a...

specific Embodiment

[0056] To test and prove BaMnO 3 , CeO 2 , the content of attapulgite on the performance of oxygen carrier, a total of two groups of experiments are given. In both sets of experiments, the prepared oxygen carrier was used to prepare carbon monoxide, and when carbon monoxide was prepared, the reaction temperature in the fuel reactor was 900 °C, and the mass ratio of coal char to oxygen carrier was 1:25.

[0057] The first set of experiments: testing BaMnO 3 with CeO 2 The influence of molar ratio is shown in Table 1; the content of attapulgite added is 40%, and other preparation parameters are the same.

[0058] Table 1 BaMnO 3 with CeO 2 The effect of molar ratio

[0059] group BaMnO 3 : CeO 2

Carbon conversion rate (%) CO concentration (%) Example 1 1：0.5 75 85 Example 2 1：1 92 89 Example 3 1：2 88 91 Comparative Example 1 CeO2 free 63 80 Comparative Example 2 Direct use of LaFeO 3

12 42 Comparative...

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Abstract

The invention belongs to the technical field of oxygen carrier preparation, and particularly discloses a perovskite type oxide, a preparation method thereof and application of the perovskite type oxide in preparation of carbon monoxide, and the preparation method comprises the following steps: S1, preparing a mixed solution containing a BaMnO3 component; s2, sequentially adding a CeO2 powder carrier material and an attapulgite powder carrier material into the mixed solution, and uniformly dispersing to obtain a mixture; and S3, carrying out calcination on the mixture, and then, carrying out granulation, so as to obtain the perovskite type oxide BaMnO3-CeO2. According to the invention, the thermal stability and oxygen capacity of the oxygen carrier can be improved, and high-selectivity and high-reaction-rate coke conversion is realized; meanwhile, an attapulgite material is added as a carrier and an adhesive material, granulation of the oxygen carrier is facilitated, the obtained oxygen carrier is high in mechanical strength, excellent in reaction performance and good in cycling stability, and continuous conversion from coal coke to carbon monoxide can be achieved in the coal coke-oxygen carrier direct chemical looping application process.

Description

technical field [0001] The invention belongs to the technical field of oxygen carrier preparation, and more particularly, relates to a perovskite oxide, a preparation method thereof, and an application in preparing carbon monoxide. Background technique [0002] Coal gasification technology, which converts coal into cleaner gas fuels, has become the most important way to efficiently and cleanly utilize coal. The gasification agent of traditional coal gasification technology mainly uses water steam, oxygen or carbon dioxide. There are some shortcomings. For example, steam coal gasification has a large demand for water resources, which is not suitable for water-deficient areas, and the gas products are very complex and require multiple subsequent processing steps before they can be used for further production; the use of oxygen as a gasification agent requires Separating oxygen from the air is costly, and at the same time, the mixture of oxygen and pulverized coal is prone to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/40
CPCC01B32/40
Inventor 张立麒曹丁山罗聪幸文婷李小姗邬凡
Owner HUAZHONG UNIV OF SCI & TECH
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