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Method of preparing phase change energy storage material

A phase-change energy storage material and a purpose-built technology, which is applied in the field of preparing phase-change energy storage materials, can solve the problems of large latent heat of phase change of products with operating costs, etc.

Active Publication Date: 2017-12-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of the invention has the advantages of low investment in production equipment, simple preparation process, low operating cost, no solvent pollution, and large latent heat of product phase change.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] This embodiment includes (A) hydrogenation, (B) sweating and (C) deployment three parts.

[0060] (A) Hydrogenation

[0061] This part includes (A1) preparation of catalyst, (A2) hydrogenation of melisperic acid and (A3) hydrogenation of shellac acid.

[0062] (A1) Catalyst Preparation

[0063] 6M HNO in an 80°C oil bath 3 Multi-walled carbon nanotubes (commercially available, purity>95%, diameter 40-60nm, length 5-15μm, provided by Shenzhen Nanoport Co., Ltd.) were oxidized for 2.0h; then filtered, washed until neutral, and baked at 120°C dry; take the above oxidized carbon nanotubes, add 70mL water, and ultrasonically disperse; add H 2 PdC1 4 solution, stirred evenly, added formaldehyde solution, adjusted the pH value to 9 with 1M NaOH solution, stirred for 25 minutes, filtered, washed with a large amount of water, and dried to obtain Pd / multi-walled carbon nanotube catalyst (Pd / MwCNTs).

[0064] Two catalysts were prepared according to the above method: cataly...

Embodiment 2

[0106] This embodiment includes (A) hydrogenation, (B) sweating and (C) deployment three parts.

[0107] (A) Hydrogenation

[0108] With embodiment 1.

[0109] (B) sweating

[0110] This part includes (B1) sweating of the hydrogenated product of melifloxacin and (B2) sweating of the hydrogenated product of shellac ceric acid.

[0111] (B1) Sweating of melissic acid hydrogenation product

[0112] This part includes: (1) preparation work, (2) crystallization, (3) heating-constant temperature-heating-constant temperature sweating, (4) refining and other processes.

[0113] (1) Preparation

[0114] Put water under the sweating dish plate. Connect the sealing system of the sweating dish with the pressurized buffer tank and the compressor; install the decompression buffer tank and connect the vacuum pump at the lower part of the sweating dish; connect the jacket of the sweating dish and the movable coil with the circulation system, and fix the coil in the On the sweating dish; u...

Embodiment 3

[0144] This embodiment includes (A) hydrogenation, (B) sweating and (C) deployment three parts.

[0145] (A) Hydrogenation

[0146] With embodiment 1.

[0147] (B) sweating

[0148] This part includes (B1) sweating of the hydrogenated product of melifloxacin and (B2) sweating of the hydrogenated product of shellac ceric acid.

[0149] (B1) Sweating of melissic acid hydrogenation product

[0150] This part includes: (1) preparation work, (2) crystallization, (3) heating-constant temperature-heating-constant temperature sweating, (4) refining and other processes.

[0151] (1) Preparation

[0152] Put water under the sweating dish plate. Connect the sealing system of the sweating dish with the pressurized buffer tank and the compressor; install the decompression buffer tank and connect the vacuum pump at the lower part of the sweating dish; connect the jacket of the sweating dish and the movable coil with the circulation system, and fix the coil in the On the sweating dish;...

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Abstract

The invention discloses a method of preparing a phase change energy storage material. The method comprises carrying out hydrogenation to deoxidize natural acid, preparing n-alkanes with even carbon numbers from the hydrogenated product through sweating, wherein in the sweating process, airflows pass through a wax layer and carry away a liquid component and gas produced from a decomposable substance dissolved in the raw material forms tiny bubbles in the wax layer so that separation effects are improved and a separation rate is accelerated, and mixing the n-alkanes with even carbon numbers to obtain the phase change energy storage material of which the phase-transition temperature can continuously change in the range of 68-72 DEG C. The method has the advantages of simple catalyst preparation process, recycling, cheap solvent, small use amount, easy recovery and recycling, low investment in the sweating device, simple processes, low operation cost, no solvent pollution on the environment and large latent heat of product phase transition.

Description

technical field [0001] The invention belongs to the technical field of special wax production, in particular to a method for preparing phase-change energy storage materials. Background technique [0002] The world's energy supply is dominated by fossil fuels such as petroleum, natural gas, and coal. With the reduction of these non-renewable resource reserves and the environmental problems caused by the use of fossil fuels are becoming more and more serious, people are paying more and more attention to energy conservation and the use of solar energy. At the same time, with the development of society, people have higher and higher requirements for living comfort, which requires more energy consumption. [0003] At home and abroad, the research on the use of phase change materials (PCM, Phase Change Material for short) to store solar energy and low-cost electric energy is currently a very active field. These studies are based on the use of phase change materials that have litt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G73/36C09K5/06
Inventor 孙剑锋王咏芳毕文卓郭慧兵王士新张志银
Owner CHINA PETROLEUM & CHEM CORP