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
CN113512409AActive Publication Date: 2021-10-19INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
Publication Date
2021-10-19

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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.
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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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