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Preparation method of lithium zirconate material for absorbing carbon dioxide at high temperature

A technology of lithium zirconate and high temperature, applied in chemical instruments and methods, separation methods, lithium compounds, etc., can solve the problems of long reaction time, complicated preparation process, high energy consumption, etc., and achieve excellent absorption performance, simple process, and preparation The effect of low temperature

Inactive Publication Date: 2008-07-09
BEIJING INSTITUTE OF TECHNOLOGYGY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing high-temperature CO absorption 2 Lithium zirconate material, the preparation process is relatively complicated, and the reaction time is long, and the energy consumption is large

Method used

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  • Preparation method of lithium zirconate material for absorbing carbon dioxide at high temperature

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Weigh ZrO with a particle size of 20nm 2 23.81 g and Li with a particle size of 0.3 μm 2 CO 3 Put 25.79g into a beaker together, add ethanol solution into the beaker, and make jelly under stirring. Treat in a microwave oven with a power of 500W for 120min, calcinate at 700°C for 6h, grind and sieve to obtain a lithium zirconate material with an average particle size of 2.4μm. The synthesized lithium zirconate material was heated at 500 °C in 20% CO 2 (80% air) at a constant temperature for a period of time, and the absorption capacity reaches 19.28wt% after the absorption equilibrium is reached.

Embodiment 2

[0013] Weigh ZrO with a particle size of 120nm 2 25.41g and Li with a particle size of 0.3um 2 CO 3 Put 22.53g into a beaker together, add methanol and ethanol mixed solution into the beaker, and make a jelly under stirring. Treat in a microwave oven with a power of 2500W for 10min, calcinate at 550°C for 6h, grind and sieve to obtain a lithium zirconate material with an average particle size of 4.1μm. The synthesized lithium zirconate material was heated at 500 °C in 20% CO 2 (80% air) at a constant temperature for a period of time, and the absorption capacity reaches 20.67wt% after the absorption equilibrium is reached.

Embodiment 3

[0015] Weigh ZrO with a particle size of 100nm 2 27.21g and Li with a particle size of 0.3um 2 CO 3 16.68g were put into a beaker together, and a mixed solution of ethanol and formic acid was added to the beaker, and a small amount of acetic acid and acetone were added, and a jelly was formed under stirring. Treat in a microwave oven with a power of 1800W for 30 minutes, calcinate at 700°C for 2h, grind and sieve to obtain a lithium zirconate material with an average particle size of 3.3μm. The synthesized lithium zirconate material was heated at 500 °C in 20% CO 2 (80% air) at a constant temperature for a period of time, and the absorption capacity reaches 25.61wt% after the absorption equilibrium is reached. At 500°C, 20% CO 2 (80% air) at a constant temperature for 3 hours, and at a constant temperature of 700°C for 1 hour in an air atmosphere. Lithium zirconate absorbs CO under this test procedure. 2 After 25 absorption cycles, the absorption capacity decay rate is ...

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Abstract

The invention relates to a novel process for preparing a lithium zirconate material of absorbing CO2 at high temperature, which needs not complex doping of multiple elements, but only needs nano ZrO2 and nano Li2CO3 as raw materials to obtain the lithium zirconate material via wet-mixing, microwave treatment and high-temperature calcining. Compared with the prior art, the invention has the advantages of low synthesis temperature, reducing energy consumption, simple process of preparation and easy industrial production.

Description

technical field [0001] The invention relates to a CO2 absorber that can directly absorb CO at high temperature 2 lithium zirconate (Li 2 ZrO 3 ) The preparation method of the material. Background technique [0002] At present, many industrial productions such as power plants and petrochemical enterprises still mainly use fossil fuels such as petroleum, coal, and natural gas as the main energy sources. Because the burning of fossil fuels will release a large amount of CO 2 gases, leading to an increase in the greenhouse effect. Generally, the temperature of the gas discharged from high-temperature furnaces in power plants and petrochemical enterprises is relatively high. Therefore, the synthesis can efficiently and rapidly absorb CO at high temperatures. 2 material, thereby reducing CO 2 The emission of gas has become one of the important ways to alleviate the greenhouse effect. Lithium zirconate materials can directly absorb CO at high temperatures between 450 and 700 ...

Claims

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Application Information

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IPC IPC(8): C01D15/00C01G25/00B01D53/62
CPCY02P20/151
Inventor 王银杰其鲁晨辉安平
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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