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A kind of carbon template method modified calcium-based carbon dioxide adsorbent and preparation method thereof

A carbon dioxide and adsorbent technology, applied in the field of modification and preparation of CaO materials, can solve the problems of industrial application limitation, complex preparation process and principle, and complex cost.

Active Publication Date: 2020-10-30
CHINA UNIV OF MINING & TECH
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Problems solved by technology

Conventional co-precipitation method and sol-gel method can synthesize nano-CaO particles, but the preparation process and principle are relatively complicated, the cost is complicated, and its industrial application is limited.
Although the CaO particles with nanoporous structure have the advantages of high performance, the particles are easy to agglomerate and sinter

Method used

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  • A kind of carbon template method modified calcium-based carbon dioxide adsorbent and preparation method thereof
  • A kind of carbon template method modified calcium-based carbon dioxide adsorbent and preparation method thereof
  • A kind of carbon template method modified calcium-based carbon dioxide adsorbent and preparation method thereof

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Embodiment 1

[0029] A method for carbon template modification of calcium-based carbon dioxide adsorbent, comprising steps:

[0030] Put calcium nitrate into a beaker containing 100ml of deionized water, heat and stir in a magnetic stirrer, then weigh gluconic acid into the beaker to dissolve, and stir at a constant temperature of 80°C for 6 hours to obtain a mixed solution;

[0031] Put the mixed solution into a drying oven at 70°C overnight to dry the dried sample;

[0032] Dry the sample at N 2 In the atmosphere, the temperature is raised to a carbonization temperature of 500°C-700°C at a rate of 10°C / min, and the carbonization is carried out with heat preservation;

[0033] The carbonized sample was heated up to 800°C at a rate of 10°C / min in an air atmosphere, calcined at a constant temperature for 2 hours, and cooled naturally to room temperature to obtain a modified metal skeleton structure nanocomposite calcium-based carbon dioxide adsorbent.

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Abstract

The invention provides a preparation method of a calcium-based carbon dioxide adsorbing agent modified by a carbon template method. The method includes the steps: uniformly mixing an inorganic calciumsource precursor, an inert carrier precursor and an organic carbon source in water solution; drying mixed liquid to obtain solid powder; carbonizing-calcining the solid powder to prepare the nano-compound calcium-based carbon dioxide adsorbing agent with a metal framework structure. The synthesized calcium-based carbon dioxide adsorbing agent has the advantages of high adsorption rate and adsorption capacity, weak dynamics limit and good circulation stability. The added organic carbon source is less in dosage, wide, low in cost and simple to prepare and can effectively solve the problem thatexisting calcium-based carbon dioxide adsorbing agent particles are easily reunited and sintered, and the carbon dioxide adsorbing capacity and the stability of the adsorbing agent are improved.

Description

technical field [0001] The invention relates to a modified preparation method of a CaO material used for capturing carbon dioxide at high temperature, in particular to a calcium-based carbon dioxide adsorbent modified by a carbon template method and a preparation method thereof. Background technique [0002] Large-scale carbon dioxide emissions from fossil fuel combustion have triggered an increasingly pronounced greenhouse effect. Coal-fired power plants are the most important source of long-term stable emissions. Controlling and reducing carbon dioxide in coal-fired flue gas is an important way to alleviate the greenhouse effect. Due to the high temperature of coal-fired flue gas, the development of high-efficiency adsorbents that can directly capture carbon dioxide at high temperatures can avoid cooling treatment and reduce energy loss in the process of carbon dioxide capture and separation. [0003] In the research, high-temperature calcium-based adsorbents have attracte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/06B01J20/30B01D53/02
CPCB01D53/02B01D2257/504B01J20/041B01J20/06B01J20/3078Y02C20/40
Inventor 王珂苏震孙吉赵鹏飞
Owner CHINA UNIV OF MINING & TECH
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