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Mesoporous coal series kaolinite energy storage phase change material and preparation method thereof

A technology of energy storage phase change and kaolinite, applied in the field of materials, can solve the problems of limited phase change materials and limited heat storage performance, and achieve excellent heat storage performance

Inactive Publication Date: 2021-10-01
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, due to the limitation of the specific surface area of ​​kaolin itself, the phase change materials supported by it are limited, so the heat storage performance is limited, and the performance in practical applications needs to be further improved.

Method used

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  • Mesoporous coal series kaolinite energy storage phase change material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0044] Preparation:

[0045] 1. Preparation of mesoporous coal series kaolinite

[0046] (1) Organic modification: use dimethyl sulfoxide and water to prepare a dimethyl sulfoxide solution with a concentration of 90%, weigh a certain amount of coal-measure kaolinite and add it, and the coal-measure kaolinite and dimethyl The mass volume ratio of the sulfoxide solution is 1g:5ml; stir in a constant temperature water bath at 70°C for 24 hours; then centrifuge to remove the supernatant, and dry the obtained solid to obtain organically modified coal-measure kaolinite;

[0047] (2) Calcination: place the organically modified coal-series kaolinite in a muffle furnace at 850°C for 4 hours to obtain calcined activated partial coal-series kaolinite;

[0048] (3) Alkali activation: mix coal-series kaolinite with 4mol / L sodium hydroxide solution at a solid-to-liquid ratio of 1:20, and place it in a water bath at 80°C for 0.5h; after the reaction is completed, Centrifuge to remove waste...

Embodiment 2

[0058] Preparation:

[0059] 1. Preparation of mesoporous coal series kaolinite

[0060] (1) Organic modification: use dimethyl sulfoxide and water to prepare a dimethyl sulfoxide solution with a concentration of 85%, weigh a certain amount of coal-measure kaolinite and add it, and the coal-measure kaolinite and dimethyl The mass volume ratio of the sulfoxide solution is 1g: 3ml; stir in a constant temperature water bath at 65°C for 22 hours; then centrifuge to remove the supernatant, and dry the obtained solid to obtain organically modified coal-measure kaolinite;

[0061] (2) Calcination: place the organically modified coal-series kaolinite in a muffle furnace at 850°C for 4 hours to obtain calcined activated partial coal-series kaolinite;

[0062] (3) Alkali activation: mix coal-series kaolinite with 2mol / L sodium hydroxide solution at a solid-to-liquid ratio of 1:18, and place it in a water bath at 75°C for 0.3h with magnetic stirring; after the reaction is complete, Cen...

Embodiment 3

[0072] Preparation:

[0073] 1. Preparation of mesoporous coal series kaolinite

[0074] (1) Organic modification: use dimethyl sulfoxide and water to prepare a dimethyl sulfoxide solution with a concentration of 95%, weigh a certain amount of coal-measure kaolinite and add it, and the coal-measure kaolinite and dimethyl The mass volume ratio of the sulfoxide solution is 1g:8ml; stir in a constant temperature water bath at 75°C for 26 hours; then centrifuge to remove the supernatant, and dry the obtained solid to obtain organically modified coal-measure kaolinite;

[0075] (2) Calcination: place the organically modified coal-series kaolinite in a muffle furnace at 850°C for 4 hours to obtain calcined activated partial coal-series kaolinite;

[0076] (3) Alkali activation: mix coal-series kaolinite with 5mol / L sodium hydroxide solution at a solid-to-liquid ratio of 1:22, and place it in a water bath at 85°C for 0.8h; after the reaction is completed, Centrifuge to remove waste...

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Abstract

The invention belongs to the technical field of materials, and particularly relates to a mesoporous coal series kaolinite energy storage phase change material and a preparation method thereof. The mesoporous coal series kaolinite energy storage phase change material is prepared from the following components in percentage by weight: 33 to 60 percent of mesoporous coal series kaolinite and 40 to 67 percent of paraffin. The preparation method comprises the following steps: carrying out organic modification on coal series kaolinite by adopting dimethyl sulfoxide to obtain organically modified coal series kaolinite, and then carrying out calcination, alkali activation and acid etching on the organically modified coal series kaolinite to obtain mesoporous coal series kaolinite; and then carrying out vacuum impregnation compounding on the obtained mesoporous coal series kaolinite and paraffin to obtain the mesoporous coal series kaolinite composite material. The mesoporous coal series kaolinite with a large specific surface area is prepared firstly, then the paraffin / mesoporous coal series kaolinite composite energy storage phase change material is prepared, the adsorption capacity of the coal series kaolinite to paraffin is improved, and therefore the heat storage performance of the composite phase change material is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a mesoporous coal series kaolinite energy storage phase change material and a preparation method thereof. Background technique [0002] With the excessive consumption of fossil energy, the world's energy problems and environmental pollution problems are becoming more and more acute. How to improve the utilization of energy has become the focus of people's attention, so the development strategy advocated by all countries. Energy storage materials with good performance can alleviate or even solve the problem of uneven distribution of energy in time and space, promote the time and space distribution of energy, improve the efficiency of energy utilization, and optimize the uneven distribution of energy. Breakthroughs and innovations in energy storage materials have become very critical. Vigorously developing energy storage materials is an important means to save energy...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 程宏飞张蒙张浩艾博徐培杰赵炳新
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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