La-Cu-Mn series oxygen storage-oxygen release material as well as preparation method and application thereof

A la-cu-mn, oxygen storage technology, applied in the field of materials, can solve problems such as poor conversion rate and thermal stability, and achieve the effects of good carbon deposition resistance, high hydrogen production rate, and high CH4 conversion rate

Active Publication Date: 2019-04-12
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

LaMnO 3 Oxygen carriers have higher hydrogen production rate and better carbon deposition resistance in chemical looping steam reforming process, but CH 4 Poor conversion and thermal stability

Method used

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  • La-Cu-Mn series oxygen storage-oxygen release material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: In this example, the La-Cu-Mn series oxygen storage-oxygen release material is La 0.8 Cu 0.2 MnO 3-δ , where 0<δ<3;

[0018] The preparation method of La-Cu-Mn series oxygen storage-oxygen release material, comprises the following steps:

[0019] (1) Add lanthanum nitrate, copper nitrate, manganese nitrate and citric acid to deionized water to obtain mixed solution A; the molar ratio of lanthanum nitrate, copper nitrate, manganese nitrate and citric acid is 0.8:0.2:1:0.1, mix The concentration of manganese nitrate in solution A is 0.1mol / L;

[0020] (2) Stir the mixed solution A obtained in step (1) at a temperature of 30°C for 10 hours to obtain sol B;

[0021] (3) The sol B obtained in step (2) was subjected to constant temperature treatment at 60°C for 36 hours to obtain gel C;

[0022] (4) Put the gel C at a temperature of 200°C for a high temperature and constant temperature calcination for 3.5 hours, and then place it at a temperature of 700°C for ...

Embodiment 2

[0023] Example 2: In this example, the La-Cu-Mn series oxygen storage-oxygen release material is La 0.3 Cu 0.7 MnO 3-δ , where 0<δ<3;

[0024] The preparation method of La-Cu-Mn series oxygen storage-oxygen release material, comprises the following steps:

[0025] (1) Add lanthanum nitrate, copper nitrate, manganese nitrate and citric acid to deionized water to obtain mixed solution A; the molar ratio of lanthanum nitrate, copper nitrate, manganese nitrate and citric acid is 0.3:0.7:1:10, mix The concentration of manganese nitrate in solution A is 2mol / L;

[0026] (2) Stir the mixed solution A obtained in step (1) at a temperature of 100°C for 1 hour to obtain sol B;

[0027] (3) The sol B obtained in step (2) was subjected to constant temperature treatment at 200°C for 8 hours to obtain gel C;

[0028] (4) Put the gel C at a temperature of 600°C for a high-temperature constant-temperature calcination for 1 hour, and then place it at a temperature of 1000°C for a second h...

Embodiment 3

[0029] Example 3: In this example, the La-Cu-Mn series oxygen storage-oxygen release material is La 0.7 Cu 0.3 MnO 3-δ , where 0<δ<3;

[0030] The preparation method of La-Cu-Mn series oxygen storage-oxygen release material, comprises the following steps:

[0031] (1) Add lanthanum nitrate, copper nitrate, manganese nitrate and citric acid to deionized water to obtain mixed solution A; the molar ratio of lanthanum nitrate, copper nitrate, manganese nitrate and citric acid is 0.7:0.3:1:8, mix The concentration of manganese nitrate in solution A is 1.6mol / L;

[0032] (2) Stir the mixed solution A obtained in step (1) at a temperature of 85°C for 2 hours to obtain sol B;

[0033] (3) The sol B obtained in step (2) was subjected to constant temperature treatment at 180°C for 12 hours to obtain gel C;

[0034] (4) Put the gel C at a temperature of 500°C for a high temperature and constant temperature calcination for 1.5 hours, and then place it at a temperature of 950°C for a ...

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Abstract

The invention discloses a La-Cu-Mn series oxygen storage-oxygen release material as well as a preparation method and application thereof, and belongs to the technical field of materials. The La-Cu-Mnseries oxygen storage-oxygen release material has a chemical general formula of LaxCu1-xMnO3-delta, wherein values of x and delta satisfy the relationships of 0.1 <= x <= 0.95, and 0 <= delta <= 3; and the La-Cu-Mn series oxygen storage-oxygen release material is prepared by adopting a sol-gel method. The La-Cu-Mn series oxygen storage-oxygen release material provided by the invention has high reactivity and thermal stability in a chemical chain reforming hydrogen production reaction, has a higher hydrogen production rate, better carbon deposition resistance and a high CH4 conversion rate.

Description

technical field [0001] The invention relates to a La-Cu-Mn series oxygen storage-oxygen release material and its preparation method and application, belonging to the field of material technology. Background technique [0002] Hydrogen is an ideal clean renewable energy, which has the advantages of high energy density and zero emissions. 3 / 4 of the earth's surface is covered by oceans, which are rich in resources and are natural hydrogen mines. In addition, hydrogen is widely used in various industries, including crude oil refining, chemical production, aerospace, metal smelting, food processing, etc. Therefore, hydrogen is an ideal fuel and energy carrier. Currently, a variety of technologies have been proposed and applied to produce hydrogen, including traditional water electrolysis, steam methane reforming, and chemical looping steam reforming. Chemical looping steam reforming is a clean and efficient new generation hydrogen production technology. [0003] Chemical loo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/48B01J23/889
CPCC01B3/48B01J23/002B01J23/8892B01J2523/00B01J2523/17B01J2523/3706B01J2523/72
Inventor 郑燕娥王雅静王禹皓李孔斋蒋丽红王华王亚明
Owner KUNMING UNIV OF SCI & TECH
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