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Method for preparing biological oil through catalytic liquefaction of microalgae

A bio-oil, microalgae technology, applied in the petroleum industry, producing fat, liquid carbon-containing fuel, etc., to achieve cost-saving effect

Inactive Publication Date: 2013-04-24
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there are few reports at home and abroad on the application of supported noble metal catalysts, molybdenum-based catalysts, and activated carbon in microalgae catalytic pyrolysis. It is of great significance for further research

Method used

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  • Method for preparing biological oil through catalytic liquefaction of microalgae

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The dried microalgae are pulverized in a pulverizer to obtain microalgae granules. Weigh 2.0 g of the treated microalgae, place it in a 17.2 mL batch autoclave, inject 6 MPa of hydrogen gas, and seal it. Put the autoclave into molten salt at 310°C, take out the autoclave after reacting for 20 minutes, and place it in water at room temperature for rapid cooling. After the reactor is cooled to room temperature, dry the reactor with a hair dryer, and then open the valve to depressurize the reactor. The reaction kettle was opened, the mixture in the kettle was poured out, the reaction mixture was extracted with dichloromethane, and the filter residue was removed by filtration to obtain an organic phase. The organic phase was removed by rotary evaporation with a rotary evaporator, and the remaining substance was bio-oil with a yield of 45.2wt.%.

Embodiment 2

[0034] The dried microalgae are pulverized in a pulverizer to obtain microalgae granules. Weigh 2.0 g of the treated microalgae, place it in a 17.2 mL batch autoclave, add 0.2 g of Pt / C catalyst, inject 6 MPa of hydrogen gas, and seal it. Put the autoclave into molten salt at 310°C, take out the autoclave after reacting for 20 minutes, and place it in water at room temperature for rapid cooling. After the reactor is cooled to room temperature, dry the reactor with a hair dryer, and then open the valve to depressurize the reactor. The reaction kettle was opened, the mixture in the kettle was poured out, the reaction mixture was extracted with dichloromethane, and the filter residue was removed by filtration to obtain an organic phase. The organic phase was removed by rotary evaporation with a rotary evaporator, and the remaining substance was bio-oil with a yield of 46.17wt.%.

Embodiment 3

[0036] The dried microalgae are pulverized in a pulverizer to obtain microalgae granules. Weigh 2.0 g of the treated microalgae, place it in a 17.2 mL batch autoclave, add 0.2 g of Pd / C catalyst, inject 6 MPa of hydrogen gas, and seal it. Put the autoclave into molten salt at 310°C, take out the autoclave after reacting for 20 minutes, and place it in water at room temperature for rapid cooling. After the reactor is cooled to room temperature, dry the reactor with a hair dryer, and then open the valve to depressurize the reactor. The reaction kettle was opened, the mixture in the kettle was poured out, the reaction mixture was extracted with dichloromethane, and the filter residue was removed by filtration to obtain an organic phase. The organic phase was removed by rotary evaporation with a rotary evaporator, and the remaining substance was bio-oil with a yield of 45.55wt.%.

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Abstract

The invention discloses a method for preparing biological oil through catalytic pyrolysis of a microalgae biomass. The method is as follows: pyrolysis liquefaction is carried out on microalgae in the presence of a catalyst in an intermittent high-pressure reaction kettle so as to prepare the biological oil. Reduced high-pressure gas is filled into the reaction kettle. A catalyst is added to the pyrolysis reaction, and the catalyst is a loaded noble metal catalyst, molybdenum-based catalyst, active carbon and the like. The microalgae comprise chlorella, spirulina, micro-green-algae, dunaliella salina and the like. The microalgae have the advantages of various types, high photosynthetic efficiency, high oil content, short production period, high oil production rate per unit area, easiness for culturing, no farmland occupation and the like and is a good raw material for preparing biological oil fuel. In addition, diesel type hydrocarbon can be prepared through modifying and upgrading the microalgae biological oil, and dependence of people on fossil fuel can be expected to be relieved.

Description

technical field [0001] The invention belongs to the fields of bioengineering and new energy, and in particular relates to a method for preparing bio-oil by catalytic liquefaction using microalgae as raw materials. Background technique [0002] With the gradual depletion of fossil fuels and the intensification of environmental pollution caused by the use of fossil fuels, it is imperative to seek renewable, non-polluting alternative new energy sources. Among all renewable new energy sources, biomass has become a research hotspot due to its high yield, low pollution, zero carbon dioxide emission and many other advantages. As an important renewable biomass, microalgae has attracted increasing attention due to its outstanding characteristics such as wide distribution, high photosynthetic efficiency, strong environmental adaptability, and short growth cycle. Therefore, the utilization and transformation technology of microalgae has gradually become one of the key research topics ...

Claims

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Application Information

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IPC IPC(8): C11B1/00C10L1/02
Inventor 段培高许玉平蔡红新张磊王枫常周凡
Owner HENAN POLYTECHNIC UNIV
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