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Preparation method and application of organic acid activated calcium-based heat carrier

An organic acid, calcium-based technology, applied in the field of preparation of calcium-based heat carrier, can solve the problem of difficulty in suppressing sintering of heat carrier, and achieve the effect of stable pore structure and sintering inhibition.

Pending Publication Date: 2022-03-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The application provides a preparation method and application of an organic acid-activated calcium-based heat carrier to solve the problem of CaCO in the prior art. 3 The technical problem that it is difficult to suppress the sintering of the heat carrier in the CaO heat storage system

Method used

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  • Preparation method and application of organic acid activated calcium-based heat carrier
  • Preparation method and application of organic acid activated calcium-based heat carrier
  • Preparation method and application of organic acid activated calcium-based heat carrier

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preparation example Construction

[0046] In one embodiment of this application, as figure 1 Shown, provide a kind of preparation method of the calcium-based heat carrier of organic acid activation, described method comprises:

[0047] S1. obtain unslaked lime powder;

[0048] S2. feeding the quicklime powder into the organic acid solution successively until the pH value of the organic acid solution meets the preset pH value to obtain a mixed solution;

[0049] S3. Stir and heat the mixed solution to obtain a precursor;

[0050] S4. Carrying out the first calcination of the precursor to obtain a modified calcium-based heat carrier;

[0051] Wherein, the concentration of the organic acid solution is 0.05g / mL~0.1g / mL;

[0052] The organic acid solution includes at least one of glycine, citric acid, alanine, formic acid, acetic acid and oxalic acid.

[0053] In this application, the positive effect of the concentration of the organic acid solution being 0.05g / mL~0.1g / mL is that under this concentration conditi...

Embodiment 1

[0083] Such as figure 2 Shown, a kind of preparation method of the calcium-based heat carrier of organic acid activation, described method comprises:

[0084] S11. Carrying out the second calcination of the natural calcium-based heat carrier to obtain quicklime powder;

[0085] S1. obtain unslaked lime powder;

[0086] S2. The unslaked lime powder is fed into the organic acid solution successively until the pH value of the organic acid solution meets the preset pH value to obtain a mixed solution;

[0087] S3. Stir and heat the mixed solution to obtain a precursor;

[0088] S4. Carrying out the first calcination of the precursor to obtain the modified calcium-based heat carrier;

[0089] Among them, the concentration of organic acid solution is 0.08g / mL

[0090] The organic acid solution is glycine, and the natural calcium-based heat carrier is egg shell.

[0091] The temperature of the first calcination is 900° C., the time of the first calcination is 2.5 h, and the tem...

Embodiment 2

[0096] Compare embodiment 2 and embodiment 1, the difference of embodiment 2 and embodiment 1 is:

[0097] The organic acid solution is citric acid.

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Abstract

The invention relates to the technical field of energy storage materials, in particular to a preparation method and application of an organic acid activated calcium-based heat carrier. The method comprises the following steps: obtaining quicklime powder; the quicklime powder is gradually fed into the organic acid solution until the pH value of the organic acid solution meets the preset pH value, and a mixed solution is obtained; stirring and heating the mixed solution to obtain a precursor; carrying out first calcination on the precursor to obtain a modified calcium-based heat carrier; wherein the organic acid solution comprises at least one of glycine, citric acid, alanine, formic acid, acetic acid and oxalic acid; the application comprises the following steps: applying the calcium-based heat carrier prepared by the method to a circular reaction of a concentrating solar power generation technology; the method comprises the following steps: activating organic acid in quicklime powder of a calcium-based heat carrier raw material, controlling the pH value of a first mixed solution, stirring and heating to form a precursor, and calcining for the first time, thereby reducing the temperature of the first calcining and preventing the calcium-based heat carrier from being sintered under a high-temperature condition.

Description

technical field [0001] This application relates to the technical field of energy storage materials, in particular to a preparation method and application of an organic acid-activated calcium-based heat carrier. Background technique [0002] The research and development of energy storage technology has always been valued by the energy, transportation, electric power, telecommunications and other departments of various countries. Among them, after the energy storage link is introduced into the power system, the demand side management can be effectively realized, which not only makes more effective use of power equipment, reduces The cost of power supply can also promote the application of renewable energy, and can also be used as a means to improve system operation stability, adjust frequency, and compensate for load fluctuations. [0003] However, the current concentrating solar thermal power generation technology is still limited by the intermittent and unstable solar energy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/16F24S60/00
CPCC09K5/16F24S60/00Y02E10/40
Inventor 徐勇庆罗聪鲁博文李小姗邬凡罗童蔡国秋张立麒
Owner HUAZHONG UNIV OF SCI & TECH
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