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Method for preparing liquid fuel by performing hydrothermal liquefaction on sandy shrubs

A sandy shrub and hydrothermal liquefaction technology, which is applied in the preparation of liquid hydrocarbon mixtures, petroleum industry, etc., can solve problems such as affecting air visibility, large pollutants, etc., so as to solve the energy crisis, reduce direct combustion and achieve huge ecological benefits. Effect

Active Publication Date: 2011-01-26
FUDAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional method of treating sandy shrub branches is direct burning, which not only produces a large amount of pollutants, but also affects the visibility of the air; recently invented other treatment methods, and the invention patent with the publication number CN101486216 mentions sandy shrub composite fiberboard manufacturing method; the invention patent with the patent number CN02158208.4 mentions a method of making sandy shrubs into a medium density fiberboard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Using the large-scale sand shrub Salix salix as raw material, first crush Salix salix, pour 30g Salix salix powder into a 250ml high-pressure reactor and add 150ml of distilled water, stir to make a slurry, and fill the reactor with 2MPa N 2 , heated to 300°C while stirring, kept for 10 min, passed tap water to cool to room temperature, and poured out the reaction mixture. After the solid-liquid separation of the product, the solid phase product is extracted with 150ml THF, and the THF solution is distilled under reduced pressure to obtain bio-oil, and THF is recovered at the same time; the water phase product is extracted with ether, and the extract is separated and extracted, and then distilled under reduced pressure to recover ether That is, water-soluble products (ie, liquid fuels) are obtained.

Embodiment 2

[0017] After crushing the large-scale sand shrub Salix salix, pour 25g Salix salix powder into a 250ml autoclave and add 150ml distilled water, stir to make a slurry, heat up to 320°C while stirring, keep it for 30min, pass tap water to cool to room temperature, The reaction mixture was decanted. After the solid-liquid separation of the product, the solid phase product is extracted with 120ml THF, and the THF solution is distilled under reduced pressure to obtain bio-oil, and THF is recovered at the same time; the water phase product is extracted with ether, and the extract is separated and extracted, and then distilled under reduced pressure to recover ether That is, the water-soluble phase product is obtained.

Embodiment 3

[0019] After crushing the large-scale sandy shrub Yellow Willow, pour 20g of salix powder into a 250ml autoclave and add 150ml of distilled water, stir to make a slurry, heat up to 340°C while stirring, keep it for 10min, pass tap water to cool to room temperature, The reaction mixture was decanted. After the solid-liquid separation of the product, the solid phase product is extracted with 120ml THF, and the THF solution is distilled under reduced pressure to obtain bio-oil, and THF is recovered at the same time; the water phase product is extracted with ether, and the extract is separated and extracted, and then distilled under reduced pressure to recover ether That is, the water-soluble phase product is obtained.

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Abstract

The invention belongs to the technical field of new energy and in particular relates to a method for preparing liquid fuel by performing hydrothermal liquefaction on sandy shrubs. The method comprises the following steps of: pretreating the collected sandy shrubs and then pouring the pretreated sandy shrubs into a high-pressure reaction kettle to form a mixed solution in a certain solid-liquid ratio; introducing inert gases with a certain pressure into the reaction kettle; stirring the mixture and heating the mixture to 200 to 450 DEG C; keeping the temperature for 5 to 120 minutes and then cooling the mixture to room temperature; collecting the reaction mixture; extracting the mixture by using an organic solvent; and separating and filtering organic phase to remove the organic solvent toobtain bio-oil. The method is suitable for various sandy shrubs. Large-area sandy shrubs are planted in the northwest area of China and need to be cut at set intervals to generate a large number of waste branches, and the waste branches can be converted into the liquid fuel by the method of the invention, so that huge economic, social and ecological benefits are produced.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a method for preparing liquid fuel by hydrothermally liquefying sandy shrubs. Background technique [0002] Sand shrubs are a kind of plants with strong growth ability and adapt to arid environment. These characteristics make them the first choice for windbreak and sand fixation, and a large area is planted in the arid regions of Northwest China. These plants need to be stubbled every once in a while, so a large number of discarded branches of sandy shrubs are produced every year. [0003] The traditional method of treating sandy shrub branches is direct burning, which not only produces a large amount of pollutants, but also affects the visibility of the air; recently invented other treatment methods, and the invention patent with the publication number CN101486216 mentions sandy shrub composite fiberboard The manufacture method of; Patent No. is that CN02158208....

Claims

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Application Information

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IPC IPC(8): C10G1/00C10G1/04
Inventor 张士成李长军陈忠武周东张良陈建民包红光
Owner FUDAN UNIV
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