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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-hydrogenation decarboxylation reaction to prepare long-chain alkanes, which solves the problem that the traditional hydrodeoxygenation method cannot process microalgae oil

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

Embodiment 1

[0061] Add 150g of deionized water and 50g of dinoflagellate oil into a 500mL intermittent high-temperature and high-pressure reactor, start stirring, heat up to 220°C for hydrolysis reaction for 6h, after the hydrolysis reaction is completed, cool to room temperature, and obtain the upper hydrolyzate (C 10 ~C 22 fatty acid) 37.8g; 37.8g hydrolyzate and 1.9g 20% ​​Cu-Cr (mass ratio 1:1) / Al 2 o 3 Add it into a 500mL intermittent high-temperature and high-pressure reactor, empty the air in the reactor, fill it with hydrogen to 7MPa, start stirring, heat up to 190°C for 2 hours, and then filter the obtained 29.6g C 10 ~C 22 Saturated fatty acids; combine 29.6g hydrogenation product and 0.6g 10%Ni / Al 2 o 3 Add it into a 500mL intermittent high-temperature and high-pressure reactor, start stirring, heat up to 350°C for 2 hours, and filter while it is hot to obtain 12.5g C 9 ~C 21 long chain alkanes.

Embodiment 2

[0063]Add 100g of deionized water and 100g of chlorella oil into a 500mL intermittent high-temperature and high-pressure reactor, start stirring, heat up to 210°C for hydrolysis reaction for 4 hours, after the hydrolysis reaction is completed, cool to room temperature, and obtain 82.5g of the upper layer hydrolyzate after the oil-water separation ; Add 82.5g of hydrolyzate and 0.8g of Raney nickel into a 500mL intermittent high-temperature and high-pressure reaction kettle, empty the air in the kettle, fill it with hydrogen to 3MPa, start stirring, and heat up to 230°C for 4 hours of hydrogenation reaction. 57.5g of C obtained by filtration 10 ~C 22 Saturated fatty acid; add 57.5g of hydrogenated product and 5.7g of 15% Fe / mesoporous silicon into a 500mL intermittent high-temperature and high-pressure reactor, start stirring, heat up to 370°C for 5 hours, and filter while hot to obtain 28.5g of C 9 ~C 21 long chain alkanes.

Embodiment 3

[0065] Add 150g of deionized water and 50g of Isochrysis oil into a 500mL intermittent high-temperature and high-pressure reactor, start stirring, and heat up to 230°C for hydrolysis reaction for 4 hours. After the hydrolysis reaction is completed, cool to room temperature, and the upper layer hydrolyzate 35.1 is obtained after oil-water separation. g; 35.1g hydrolyzate and 0.2g 15% Cu-Cr (mass ratio 1:1) / SiO 2 Add it into a 500mL intermittent high-temperature and high-pressure reaction kettle, empty the air in the kettle, fill it with hydrogen to 9MPa, start stirring, heat up to 180°C and perform hydrogenation reaction for 1 hour, then filter the obtained 26.1g C 10 ~C 22 Saturated fatty acid; add 26.1g of hydrogenated product and 3.9g of 5% Ni / MWCNTs into a 500mL intermittent high-temperature and high-pressure reactor, start stirring, heat up to 370°C for 8 hours, and filter while hot to obtain 15.3g of 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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