Hydrocarbon phase change heat storage material and preparation method thereof with natural acid as raw material

A technology of phase change heat storage and hydrocarbons, applied in heat exchange materials, chemical instruments and methods, and producing hydrocarbons from oxygen-containing organic compounds, etc., can solve the problem of high equipment and material requirements, impossibility of practical application, and dangerous operation It has the advantages of easy recycling, high latent heat of product phase change, and flexible process operation.

Active Publication Date: 2013-05-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods can obtain the corresponding n-alkane monomers, there are certain problems in each method: as the first method, the process conditions are more complicated, and the requirements for some equipment and materials are very high; the second method is only applicable For symmetrical even-numbered alkanes, the resulting products need to be extracted repeatedly with ether solvent; the third and fourth methods are

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1

[0023] (1) Catalyst preparation

[0024] Use 6M HNO in 80 ℃ oil bath 3 Multi-walled carbon nanotubes (commercially available products, purity> 95%, diameter 40~60nm, length 5~15μm, provided by Shenzhen Nanoport Co., Ltd.) oxidize for 2h; then filter, wash until neutral, and dry at 120 ℃; take the oxidized carbon nanotube and add 70mL Water, ultrasonic dispersion; 2%~10% palladium as the active component by mass percentage, add H 2 PdC1 4 After stirring the solution, add the formaldehyde solution, adjust the pH value to 9 with 1M NaOH solution, stir for 25min, filter, wash with plenty of water, and dry to obtain Pd / multi-walled carbon nanotube catalyst (Pd / MwCNTs).

[0025] Two catalysts were prepared according to the above method: Catalyst 1 (Palladium content of 4%) and Catalyst 2 (Palladium content of 7%).

[0026] (2) Myristic acid hydrodeoxygenation

[0027] Add 2.0 parts (parts by volume, the same below) myristic acid, 0.5 parts of Pd / MwCNTs catalyst 2 and 1...

Example Embodiment

[0038] Example 2

[0039] (1) Preparation of catalyst (same as Example 1)

[0040] (2) Hydrogenation of myristic acid.

[0041] Add 2.5 parts (parts by volume, the same below) myristic acid, 0.3 parts of Pd / MwCNTs catalyst 1 and 20 parts of n-hexane into a 100mL reactor, fill it with hydrogen, and start stirring and heating at 280 ℃. The reaction was stopped after 6 hours. After cooling to room temperature, the catalyst was separated by filtration. Quantitative detection of the product by gas chromatography showed that the conversion rate of raw myristic acid was 82%, and the total yield of product tetradecane was 76% (molar yield, the product n-tetradecane accounts for the percentage of raw myristic acid, Same below).

[0042] (3) Palmitic acid hydrodeoxygenation.

[0043] Add 2.5 parts (parts by volume, the same below) n-hexadecanoic acid, 0.3 parts of Pd / MwCNTs catalyst 1 and 20 parts of n-octane into a 100mL reactor, fill it with hydrogen, and start the stirring and heating at an...

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PUM

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Abstract

The invention relates to a hydrocarbon phase change heat storage material and a preparation method thereof with natural acid as a raw material. According to the invention, a natural acid raw material and a solvent are mixed and then undergo a hydrogenation reaction in the presence of a catalyst and hydrogen so as to prepare corresponding n-alkanes with an even carbon number and high purity, and the n-alkanes with an even carbon number and a mixture thereof are a high performance hydrocarbon phase change heat storage material which is especially applicable to preparation of a 5-DEG C to 10-DEG C heat storage material needed by refrigeration of an air-conditioner. Compared with the prior art, the invention has the following advantages: the preparation method is simple, and the prepared hydrocarbon phase change heat storage material has great latent heat of phase change.

Description

technical field [0001] The invention belongs to the technical field of special waxes, and in particular relates to the preparation of high-performance hydrocarbon phase-change thermal storage materials through proper treatment of natural acids. Background technique [0002] The world's energy supply is dominated by fossil fuels such as oil, natural gas, and coal. With the reduction of these non-renewable resource reserves and the rise in prices, research on various alternative energy sources has been continuously strengthened; and the environmental problems caused by the use of these fossil fuels are becoming more and more serious. Seriously, the utilization of energy saving and solar energy has been widely valued. 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 fo...

Claims

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Application Information

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IPC IPC(8): C09K5/04C07C1/22C07C1/207C07C9/15C07C9/22
Inventor 孙剑锋张志银张造根王立言全辉姚春雷赵威林振发高蒿
Owner CHINA PETROLEUM & CHEM CORP
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