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Method for preparing porous calcium-based material from eggshell and application of porous calcium-based material in thermochemical energy storage

A technology of porous calcium and base materials, applied in heat exchange materials, chemical instruments and methods, heat storage equipment, etc., can solve problems such as easy agglomeration and sintering, and research has not been reported, and achieve good performance and good cycle stability. Sexual, low-cost effect

Active Publication Date: 2021-10-19
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI +1
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AI Technical Summary

Problems solved by technology

Calcium-based materials also have some significant disadvantages: the material is prone to agglomeration and sintering during repeated recycling
The practical application of eggshell membranes is relatively common in the cosmetics industry, but the related research on preparing porous media calcium-based thermochemical energy storage materials using eggshell membranes as a template has not been reported yet.

Method used

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  • Method for preparing porous calcium-based material from eggshell and application of porous calcium-based material in thermochemical energy storage
  • Method for preparing porous calcium-based material from eggshell and application of porous calcium-based material in thermochemical energy storage
  • Method for preparing porous calcium-based material from eggshell and application of porous calcium-based material in thermochemical energy storage

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Embodiment Construction

[0025] The following examples further illustrate the content of the present invention, but should not be construed as limiting the present invention. Without departing from the spirit and essence of the present invention, the modifications and substitutions made to the methods, steps or conditions of the present invention all belong to the scope of the present invention. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0026] The present invention first prepares calcium nitrate with egg shell as calcium source, uses eggshell membrane as template, uses citric acid as gelling agent, adopts sol-gel method to prepare the eggshell membrane material coated with calcium nitrate, and then the above-mentioned obtained The material was washed and filtered, and calcined at a high temperature of 650 °C for 2 hours to remove the eggshell membrane template to obtain a porous calcium-based material. In o...

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Abstract

The invention discloses a method for preparing a porous calcium-based material from eggshells and application of the porous calcium-based material in thermochemical energy storage, and belongs to the technical field of thermochemical energy storage. The preparation method comprises the following steps: preparing calcium nitrate by taking egg shells as a calcium source, preparing a calcium nitrate-coated egg shell membrane material by taking an egg shell membrane as a template and citric acid as a gelling agent and adopting a sol-gel method, then cleaning and filtering the obtained material, and calcining at high temperature of 650 DEG C for 2 hours to remove the egg shell membrane template to obtain the porous calcium-based material. The magnesium-doped calcium-based material prepared in the invention has good cycle stability and shows good energy storage performance in calcium carbonate / calcium oxide / carbon dioxide cycle, and the preparation method has the advantages of low cost and simple preparation process, and is suitable for industrial scale-up production in the future.

Description

technical field [0001] The invention belongs to the technical field of thermochemical energy storage, and in particular relates to a method for preparing porous calcium-based materials from eggshells and its application in thermochemical energy storage. Background technique [0002] The current energy supply mainly depends on traditional fossil fuels, which has brought a series of environmental problems. Driven by the goal of "carbon neutrality", the demand for low-carbon energy is increasing. The development of renewable energy and the improvement of overall energy utilization efficiency are the keys to solving current energy and environmental problems. Renewable energy and waste heat resources have intermittent characteristics, and the development of heat storage technology has become particularly important. At present, there are three main heat storage methods: sensible heat, latent heat and thermochemical heat storage. Compared with the former two, thermochemical energy...

Claims

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Application Information

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IPC IPC(8): C09K5/14F28D20/00
CPCC09K5/14F28D20/003Y02E60/14
Inventor 黄彩凤许闽李勋锋淮秀兰
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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