Method for converting oil or higher fatty acid into long-chain alkanes by hydrothermal method

A technology for higher fatty acids and long-chain alkanes, which is applied in the field of hydrothermal conversion of oil or its hydrolyzed product higher fatty acids into long-chain alkanes, which can solve the problems of separation of unfavorable products and achieve wide distribution of raw materials, low energy consumption, and easy operation simple effect

Active Publication Date: 2020-04-28
SHANGHAI JIAOTONG UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current industrialization of decarboxylation and decarbonylation technologies still faces many problems: first, they basically need to use noble metals as catalysts or sulfur-containing catalysts, such as Pb / C, Pt / C; second, decarboxylation technology requires a high temperature of 370 ° C; It is the decarboxylation technology that requires dodecane as a solvent, which is not conducive to the separation of products

Method used

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  • Method for converting oil or higher fatty acid into long-chain alkanes by hydrothermal method
  • Method for converting oil or higher fatty acid into long-chain alkanes by hydrothermal method
  • Method for converting oil or higher fatty acid into long-chain alkanes by hydrothermal method

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Embodiment 1

[0033] This embodiment provides a method for preparing pentadecane by hydrothermal conversion of metal element (Zn powder) and metal catalyst (Ni powder). This embodiment includes multiple groups of parallel tests, the reaction temperature, reaction The time and fill rate are different.

[0034] The method comprises the steps of:

[0035] Hexadecanoic acid, Zn powder, Ni powder (1:20:10) and water are packed in the hydrothermal reactor, and the reactor filling rate is 40%, and the reactor is sealed, and it is placed in the temperature of 300 ℃ In the salt bath, react for 16 hours. After the reaction, take out the mixture and extract it with ethyl acetate to obtain pentadecane. After the reaction, the product was characterized by GC-MS (see figure 1 ) and GC-FID quantitative analysis (see figure 2 ), GC-MS qualitative analysis shows that pentadecane is the main product, GC-FID quantitative analysis shows that the highest yield can reach 90%.

[0036] In industrial applicat...

Embodiment 2

[0039] In the small experiment of this example, octadecanoic acid was converted into heptadecane by hydrothermal method.

[0040] The method of this embodiment is as follows: a tubular intermittent hydrothermal reactor with SUS316 stainless steel round tube is used for experimentation, and octadecanoic acid, Zn powder, Ni powder (1:20:10) and water are loaded into the hydrothermal reactor , the filling rate of the reactor is 40%, the reactor is sealed, and it is placed in a salt bath with a temperature of 300° C. for 16 hours. After the reaction, the mixture is taken out and extracted with an organic solvent to obtain heptadecane. GC-MS qualitative analysis and GC-FID quantitative analysis were performed on the reacted product. GC-MS qualitative analysis showed that heptadecane was the main product, and GC-FID quantitative analysis showed that the highest yield could reach 83%.

[0041] In industrial applications, a suitable hydrothermal reactor can be used according to the ne...

Embodiment 3

[0044] In the small experiment of this example, dodecanoic acid is converted into undecane by a hydrothermal method.

[0045] The method of this embodiment is as follows: a tubular intermittent hydrothermal reactor with a SUS316 stainless steel round tube is used for the experiment, and dodecanoic acid, Zn powder, Ni powder (1:20:10) and water are loaded into the hydrothermal reactor , The filling rate of the reactor is 40%. Seal the reactor and place it in a salt bath with a temperature of 300°C for 2-20 hours. After the reaction, take out the mixture and extract it with an organic solvent to obtain dodecane. GC-MS qualitative analysis and GC-FID quantitative analysis were performed on the reacted product. GC-MS qualitative analysis showed that undecane was the main product, and GC-FID quantitative analysis showed that the highest yield could reach 81%.

[0046] In industrial applications, a suitable hydrothermal reactor can be used according to the needs, and the reaction temp...

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Abstract

The invention discloses a hydrothermal method for converting oil or oil hydrolysate, namely, higher fatty acid into long-chain alkane. According to the method, oil or oil hydrolysate, namely, higher fatty acid is taken as a raw material to react in a hydrothermal reactor at 150-450 DEG C for 2-24 h with metal and a metal oxide used as reaction catalysts and metal elements or metal waste used as a reducing agent, and thus, long-chain alkane with the highest yield of 90% can be obtained. The long-chain alkane can be synthesized effectively and highly selectively with the method. Biomass oil or oil hydrolysate, namely, higher fatty acid is used as the raw material, the condition that a large number of fossil fuel is consumed in traditional industrial preparation methods is avoided, preparation of complex noble metal catalysts is not required, and the method is simple to operate and high in conversion rate, requires no pure hydrogen, causes small environmental pollution due to adoption of water as a hydrogen source and a reaction solvent and is beneficial to industrial production. The long-chain alkane product can be used for producing aviation fuel to replace traditional 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 hydrothermally converting oil or its hydrolyzed product higher fatty acid into long-chain alkanes. Background technique [0002] Since the beginning of the 21st century, with the pace of global modernization, the potential energy shortage crisis of fossil fuels, especially gasoline refined from petroleum, is one of the reasons for the global oil crisis. Therefore, reducing dependence on fossil fuels and developing new renewable clean energy sources have attracted more and more attention. [0003] Among renewable energy sources such as solar energy, wind energy, water energy, geothermal energy, tidal energy, and biomass energy, biomass energy is the only source that can be converted into liquid fuel, and is a substitute for fossil fuels. It can be widely used as aviation fuel in the future. source. [0004] Aviation oil is a special ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G3/00C10L1/04
CPCC10G3/45C10G3/52C10G2300/1014C10G2300/1018C10L1/04C10L2270/04Y02P30/20
Inventor 金放鸣蒋采玲姚国栋金滨滨
Owner SHANGHAI JIAOTONG UNIV
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