Hydrocarbon phase change heat storage materials and preparation method using natural acid as raw material

A phase-change heat storage and phase-change latent heat technology, which is applied in heat exchange materials, chemical instruments and methods, hydrocarbons, etc., and can solve problems such as high requirements for equipment and materials, impossible practical application, and complex process conditions. , to achieve the effect of easy recycling, cheap solvent and flexible process operation

Active Publication Date: 2014-05-07
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 very dangerous to operate, and petroleum ether is very easy to erupt in the violent reaction between metal sodium and halogenated alkanes, with low safety factor and high cost
If precision distillation is used to extract various monomeric n-alkanes, and then mix n-alkanes with even carbon numbers to prepare hydrocarbon phase-change heat storage materials with continuously changing phase-change temperature, the cost is too high to be practically applied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Catalyst preparation

[0025] 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 Nanometer Harbor Co., Ltd.) were oxidized for 2h; then filtered, washed until neutral, and dried at 120°C Get the above-mentioned carbon nanotubes that have been oxidized, add 70mL water, and ultrasonically disperse; 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).

[0026] Two catalysts were prepared according to the above method: catalyst 1 (4% palladium mass content) and catalyst 2 (7% palladium mass content).

[0027] (2) Arachidic acid hydrodeoxygenation

[0028] Add 1.5 parts of arachidic acid, 0.4 parts of Pd / MwCNTs catalyst 1, and 16 parts of n-hexane into a 100 mL reacto...

Embodiment 2

[0038] (1) Catalyst preparation (same as Example 1).

[0039] (2) Arachidic acid hydrogenation

[0040] Add 2.0 parts of arachidic acid, 0.5 parts of Pd / MwCNTs catalyst 2 and 18 parts of n-hexane into a 100mL reactor, fill it with hydrogen (containing 20μL / L of NH3), the initial hydrogen pressure is 6.0MPa, start stirring and heating, and react at 300°C After 7 hours, the reaction was stopped. 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 arachidic acid was 94%, and the yield of the product n-eicosane was 88%.

[0041] (3) Hydrodeoxygenation of behenic acid

[0042] Add 2.0 parts of behenic acid, 0.5 parts of Pd / MwCNTs catalyst 1 and 18 parts of n-hexane into a 100 mL reaction kettle, and fill it with hydrogen (containing 20 μL / L of NH 3 ), the initial hydrogen pressure is 6.0MPa, start stirring and heating, stop the reaction after reacting at 300°C ...

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PUM

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Abstract

The invention discloses hydrocarbon phase change heat storage materials and a preparation method using natural acid as a raw material. A natural acid raw material is mixed with a solvent for hydrogenation reaction in the presence of a catalyst and hydrogen to prepare corresponding high-purity even-carbon-number n-alkanes, the even-carbon-number n-alkanes and mixtures thereof are the high-performance hydrocarbon phase change heat storage materials, and the preparation method is particularly applicable to preparing of the hydrocarbon phase change heat storage materials at 36-45 DEG C. Compared with the prior art, the preparation method is simple, and the latent heat of phase change of a product is high.

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 by using natural acids as raw materials through appropriate treatment. 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 storage of solar energy and low-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C07C1/207C07C9/22
Inventor 孙剑锋张志银张造根王立言全辉姚春雷赵威高蒿
Owner CHINA PETROLEUM & CHEM CORP
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