Method for preparing micro-algal oil by microalgae hydro-thermal liquefaction

A technology of hydrothermal liquefaction and microalgae oil, which is applied in the preparation of liquid hydrocarbon mixtures, the petroleum industry, and the treatment of hydrocarbon oils. It can solve the problems of high equipment requirements, achieve small land occupation, fast growth and reproduction, and high calorific value. The effect of high yield

Inactive Publication Date: 2015-03-25
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese invention patent application with the application number 200910054288.X proposes a method for preparing liquid fuel by hydrothermal liquefaction of microalgae, but this method needs to be flushed into high-pressure N 2 , higher requirements for equipment

Method used

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  • Method for preparing micro-algal oil by microalgae hydro-thermal liquefaction

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Effect test

Embodiment 1

[0022] Using microalgae as raw materials, take 20g of microalgae and 150ml of distilled water and put them into a 300ml high-pressure reactor, and stir to prepare microalgae slurry. The reactor was sealed, with N 2 Drain the air in the kettle, turn on the heating switch, set the stirring speed to 200r / min, start to heat up to 300°C at a rate of about 4°C / min, keep it for 30min, turn off the heating switch immediately, cool to room temperature, collect the generated gas, and turn on Take out the reaction mixture from the kettle, and use CH 2 Cl 2 Clean the inner wall of the reaction kettle and the stirrer, and extract the mixture. Separate the extract and filter the CH with a Buchner funnel 2 Cl 2 phase, and then recover CH by vacuum distillation 2 Cl 2 , to obtain microalgae oil.

[0023] The yield of microalgae oil was 23.00%, and the calorific value was 35.81KJ / g. The water-soluble phase product can be recycled and used for microalgae cultivation after certain treatm...

Embodiment 2

[0025] Using microalgae as raw material, take 20g of microalgae and 200ml of distilled water into a 300ml autoclave, stir to prepare microalgae slurry. The reactor was sealed, with N 2 Drain the air in the kettle, turn on the heating switch, set the stirring speed at 200r / min, start to heat up to 320°C at a rate of about 4°C / min, keep it for 30min, turn off the heating switch immediately, cool to room temperature, collect the generated gas, and turn on Take out the reaction mixture from the kettle, and use CH 2 Cl 2 Clean the inner wall of the reaction kettle and the stirrer, and extract the mixture. Separate the extract and filter the CH with a Buchner funnel 2 Cl 2 phase, and then recover CH by vacuum distillation 2 Cl 2 , to obtain microalgae oil.

[0026] The yield of microalgae oil is 30.62%, and the calorific value is 32.34KJ / g. The water-soluble phase product can be recycled and used for microalgae culture after certain treatment, and the remaining solid-phase a...

Embodiment 3

[0028] Using microalgae as raw material, take 20g of microalgae and 200ml of NaOH solution with a concentration of 5.0%, put them into a 300ml high-pressure reactor, and stir to prepare a microalgae slurry. The reactor was sealed, with N 2 Exhaust the air in the kettle, turn on the heating switch, set the stirring speed at 200r / min, start to heat up to 300℃ at a rate of about 4℃ / min, keep it for 30min, turn off the heating switch immediately, cool to room temperature, collect the generated gas, and open the kettle Take out the reaction mixture, utilize CH 2 Cl 2 Clean the inner wall of the reaction kettle and the stirrer, and extract the mixture. Separate the extract and filter the CH with a Buchner funnel 2 Cl 2 phase, and then recover CH by vacuum distillation 2 Cl 2 , to obtain microalgae oil.

[0029] The yield of microalgae oil is 32.83%, and the calorific value is 30.53KJ / g. The water-soluble phase product can be recycled and used for microalgae culture after cer...

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Abstract

The invention discloses a method for preparing micro-algal oil by microalgae hydro-thermal liquefaction. The method comprises the following steps of 1, culturing and collecting microalgae, adding the microalgae into a hydro-thermal reactor and mixing the microalgae and deionized water to obtain a microalgae liquid with a solid-liquid ratio of 1-50g: 100ml, 2, sealing the hydro-thermal reactor, completely removing air in the reactor, carrying out heating to a temperature of 180-450 DEG C with stirring and keeping the temperature for 10-180min, and 3, cooling and collecting the reaction products, carrying out extraction and suction extraction, separating and filtering an organic phase, removing the organic solvent and collecting the micro-algal oil. The method utilizes microalgae as a raw material, utilizes a mild and controllable hydro-thermal reaction system to prepare the micro-algal oil, reduces energy consumption and a cost of the reaction system, improves a calorific value and a yield of the micro-algal oil and realizes resource utilization of algae waste causing water eutrophication.

Description

technical field [0001] The invention relates to the technical field of biomass energy, in particular to a method for preparing microalgae oil by hydrothermally liquefying microalgae. Background technique [0002] With the development of the economy and the improvement of people's living standards, the demand for energy is increasing day by day. At the same time, the fossil fuels represented by coal and oil are becoming increasingly exhausted, and the extensive use of fossil fuels will inevitably bring about problems such as the greenhouse effect. How to break the bottleneck of energy depletion and environmental pollution is a major issue facing all mankind. Renewable energy represented by biomass energy has attracted widespread attention because of its environmental friendliness and renewable characteristics. [0003] Biomass energy, as a clean and renewable energy source, can realize the closed cycle of carbon in the utilization process, thereby reducing the emission of CO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00C10L1/00
CPCC10G1/00C10G2300/1014C10L1/00
Inventor 孙予罕李晋平肖亚宁孔令照刘子玉魏伟孙志强
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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