Method for preparing long-chain alkane with microalg al oil as raw material in low hydrogen consumption

A long-chain alkane, microalgae oil technology, applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve problems such as inability to handle microalgae oil, and achieve the effect of reducing catalytic costs and reducing hydrogen consumption

Active Publication Date: 2015-05-13
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the present invention, the microalgae oil is prepared through non-catalytic hydrolysis reaction, unsaturated fatty acid hydrogenation reaction and non-hydrogen

Method used

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  • Method for preparing long-chain alkane with microalg al oil as raw material in low hydrogen consumption
  • Method for preparing long-chain alkane with microalg al oil as raw material in low hydrogen consumption
  • Method for preparing long-chain alkane with microalg al oil as raw material in low hydrogen consumption

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0060] Example 1

[0061] Add 150g of deionized water and 50g of gymnodinium oil to a 500mL batch high-temperature and high-pressure reactor, stir, heat up to 220 ℃ for hydrolysis reaction for 6 hours, after the hydrolysis reaction, cool to room temperature, oil and water separation to obtain the upper hydrolysate (C 10 ~C 22 Fatty acid) 37.8g; 37.8g hydrolysate and 1.9g 20% ​​Cu-Cr (mass ratio 1:1) / Al 2 O 3 Add to a 500mL batch high-temperature and high-pressure reactor, evacuate the air in the reactor, fill with hydrogen to 7MPa, start stirring, heat up to 190℃, hydrogenation reaction for 2h, and filter the 29.6g C obtained while hot 10 ~C 22 Saturated fatty acid; 29.6g hydrogenation product and 0.6g 10% Ni / Al 2 O 3 Add to a 500mL batch high-temperature and high-pressure reactor, start stirring, heat to 350℃ and react for 2h, filter while hot to obtain 12.5g C 9 ~C 21 Long chain alkanes.

Example Embodiment

[0062] Example 2

[0063] Add 100g of deionized water and 100g of chlorella oil into a 500mL batch-type high temperature and high pressure reactor, start stirring, heat up to 210°C for 4h hydrolysis reaction, after the hydrolysis reaction, cool to room temperature, oil and water separation to obtain the upper hydrolysate 82.5g ; Add 82.5g of hydrolysate and 0.8g of Raney nickel to a 500mL batch-type high-temperature high-pressure reactor, empty the air in the kettle, fill with hydrogen to 3MPa, turn on stirring, heat up to 230°C for 4h after hydrogenation reaction, while hot 57.5g C filtered 10 ~C 22 Saturated fatty acid; 57.5g hydrogenation product and 5.7g 15% Fe / mesoporous silicon were added to a 500mL batch high-temperature high-pressure reactor, stirred, heated to 370°C for 5 hours, and filtered while hot to obtain 28.5g C 9 ~C 21 Long chain alkanes.

Example Embodiment

[0064] Example 3

[0065] Add 150g of deionized water and 50g of Isochrysis oil into a 500mL batch-type high-temperature and high-pressure reactor, start stirring, heat up to 230℃ for hydrolysis reaction for 4h, after the hydrolysis reaction, cool to room temperature, oil-water separation to obtain the upper hydrolysate 35.1 g; Combine 35.1g hydrolysate and 0.2g 15% Cu-Cr (mass ratio 1:1) / SiO 2 Add to a 500mL batch high-temperature and high-pressure reactor, evacuate the air in the reactor, fill with hydrogen to 9MPa, turn on stirring, heat up to 180°C for hydrogenation for 1 hour, and filter the 26.1g C obtained while hot 10 ~C 22 Saturated fatty acid; add 26.1g hydrogenation product and 3.9g 5% Ni / MWCNTs into a 500mL batch high temperature and high pressure reactor, turn on stirring, heat to 370°C for 8 hours, and filter while hot to obtain 15.3g C 9 ~C 21 Long chain alkanes.

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Abstract

The invention discloses a method for preparing long-chain alkane with microalg al oil as raw material in low hydrogen consumption. The method comprises the following steps: (1) mixing microalg al oil with water, heating to generate a hydrolysis reaction, and treating to obtain C10-C22 fatty acids; (2) generating a hydrogenation reaction on the C10-C22 fatty acids and hydrogen under the action of a non-noble metal supported catalyst a or raney nickel, and treating to obtain C10-C22 saturated fatty acids; and (3) generating a decarboxylic reaction on the C10-C22 saturated fatty acids under the action of a non-noble metal supported catalyst b, and treating to obtain C9-C21 long-chain alkane. The method disclosed by the invention is cheap and easily available in raw materials and lower in hydrogen consumption, and the adopted non-noble metal supported catalysts a and b can be recycled to reduce the catalytic cost. The reaction process of the method provided by the invention is simple to operate, and the products are convenient and quick to separate, so that the method is a quite ideal method for degrading the microalg al oil to prepare the long-chain alkane.

Description

technical field [0001] The invention relates to the field of oil degradation, in particular to a method for preparing long-chain alkanes with low hydrogen consumption using microalgae oil as a raw material. Background technique [0002] Due to the gradual reduction of oil resources and the resulting greenhouse benefits, at the United Nations Climate Change Conference in Copenhagen in 2009, the civil aviation industry submitted a clear emission reduction plan. Starting from 2020, the entire industry will achieve zero growth in carbon emissions. Studies have shown that efficient and reasonable use of biomass can reduce carbon dioxide emissions by about 90% compared with fossil fuels. Compared with traditional aviation kerosene, bio-aviation kerosene can effectively reduce carbon dioxide emissions. Therefore, it is imperative to vigorously develop bio-aviation kerosene technology. At present, the main problems restricting the development of bio-aviation kerosene are to solve t...

Claims

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Application Information

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IPC IPC(8): C07C1/207C07C9/15C07C9/22
Inventor 傅杰王元聪吴江华侯昭胤姜坤吕秀阳
Owner ZHEJIANG UNIV
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