Method for converting higher fatty acid into long-chain alkane by using photocatalysis decarboxylation method

A technology for higher fatty acids and long-chain alkanes, which is applied in the field of photocatalytic decarboxylation and conversion of higher fatty acids into long-chain alkanes. It can solve the problems of difficult realization and complicated reaction process, and achieve the effects of reduced reaction cost, simple preparation process and low energy consumption.

Inactive Publication Date: 2018-01-09
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latter’s current decarboxylation methods still face many problems: first, they basically require an external hydrogen source or reducing agent; second, the decarboxylation technology requires high energy consumption conditions such as high temperature of 370 ° C and high pressure of 1 MPa; third, the reaction process is complicated and difficult to realize

Method used

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  • Method for converting higher fatty acid into long-chain alkane by using photocatalysis decarboxylation method
  • Method for converting higher fatty acid into long-chain alkane by using photocatalysis decarboxylation method
  • Method for converting higher fatty acid into long-chain alkane by using photocatalysis decarboxylation method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] This embodiment provides a kind of photocatalyst TiO 2 A method for catalytically converting hexadecanoic acid to prepare pentadecane under the irradiation of an ultraviolet light source, such as figure 1 shown.

[0040] The method comprises the steps of:

[0041] 30ml of n-heptane solution of hexadecanoic acid (concentration of hexadecanoic acid 0.005M) and TiO 2 Put 15 mg into the photocatalytic reactor, ultrasonicate for 30 minutes, purge the reaction device with nitrogen until the reactor is a nitrogen atmosphere, seal the reactor, and place it in a cooling circulating water tank at 20°C to control the reaction temperature at 20°C , and placed on a magnetic stirrer to stir, and reacted for 4h under the irradiation of a 150W mercury lamp. After the reaction, the product was characterized by GC-MS (see figure 2 ) and GC-FID quantitative analysis (see image 3 ), GC-MS qualitative analysis showed that pentadecane was the main product, and GC-FID quantitative ana...

Embodiment 2

[0045] In this example, the photocatalyst TiO 2 / Pt (1wt%) was used to catalyze the conversion of hexadecanoic acid to prepare pentadecane under the irradiation of ultraviolet light source.

[0046] The method of the present embodiment is as follows: adopt stainless steel photocatalytic reactor, 30ml (hexadecanoic acid concentration 0.005M) and TiO 2 / Pt (1wt%) 15mg was put into the photocatalytic reactor, ultrasonicated for 30min, and the reaction device was purged with nitrogen until the reactor was a nitrogen atmosphere, the reactor was sealed, and placed in a cooling circulating water tank at 20°C for use. The reaction temperature was controlled at 20°C, stirred on a magnetic stirrer, and reacted for 24 hours under the irradiation of a 150W mercury lamp. GC-MS qualitative analysis and GC-FID quantitative analysis were performed on the reacted product. GC-MS qualitative analysis showed that pentadecane was the main product, and GC-FID quantitative analysis showed that the ...

Embodiment 3

[0050] In this example, the photocatalyst TiO 2 / Co 3 o 4 (1wt%) catalytic conversion of hexadecanoic acid under the irradiation of ultraviolet light source to prepare pentadecane.

[0051] The method of the present embodiment is as follows: adopt stainless steel photocatalytic reactor, 30ml (hexadecanoic acid concentration 0.005M) and TiO 2 / Co 3 o 4 (1wt%) 15mg was put into the photocatalytic reactor, ultrasonicated for 30min, the reaction device was purged with nitrogen until the reactor was nitrogen atmosphere, the reactor was sealed, and it was placed in a 20°C cooling circulating water tank to make the reaction temperature Controlled at 20°C, placed on a magnetic stirrer for stirring, and reacted for 4 hours under the irradiation of a 150W mercury lamp. GC-MS qualitative analysis and GC-FID quantitative analysis were performed on the reacted product. GC-MS qualitative analysis showed that pentadecane was the main product, and GC-FID quantitative analysis showed that...

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Abstract

The invention relates to a method for converting higher fatty acid into long-chain alkane by using a photocatalysis decarboxylation method. The method comprises the step: in the presence of a nitrogenatmosphere and a solvent, performing a photocatalysis reaction so as to convert the higher fatty acid into long-chain alkane, wherein the catalyst is TiO2 and/or metal surface modified TiO2. By adopting the method provided by the invention, under the condition that no external hydrogen sources are needed, long-chain alkane is synthetized with low energy consumption and high efficiency, and the yield can be up to 46%. The higher fatty acid can be sufficiently adopted as a raw material, and the raw material is reacted at the room temperature in the presence of light energy, so that the situation that a great deal of fossil fuel is consumed in a conventional industrial preparation method is avoided, high-temperature and high-pressure reaction conditions are not needed, complex catalysts arealso not needed, the operation is simple, no external hydrogen sources are needed, and the conversion rate is relatively high; and a reaction solvent and a product can be separated through simple rotational evaporation or are directly used as fuel, so that industrial production is facilitated. The product, namely long-chain alkane, can be used as aviation fuel to replace fossil fuel.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical industry, and in particular relates to a method for converting higher fatty acids into long-chain alkanes through photocatalytic decarboxylation. Background technique [0002] In contemporary society, with the rapid development of industry, economy, technology and energy consumption in human society, the energy crisis has become a major factor restricting human development, and finding alternative clean energy is one of the most important tasks facing human beings. The consumption of traditional fossil energy not only brings huge environmental problems, but also gradually faces depletion due to the limited reserves and the rapid increase in human exploitation rate. Therefore, reducing dependence on fossil fuels and developing a new, safe and renewable clean energy has become an urgent task for human beings to alleviate energy shortage and environmental pollution. [0003] The current ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/207C07C9/15C07C9/22
Inventor 金放鸣丁珂璠金滨滨姚国栋
Owner SHANGHAI JIAO TONG UNIV
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