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Method for preparing bio-oil by treating duckweed biomass by using hydrothermal method

A technology of bio-oil and hydrothermal method, which is applied in the preparation of liquid hydrocarbon mixtures and the petroleum industry, can solve the problems of lack of research and achieve the effects of rapid growth, environmental protection and cost saving

Inactive Publication Date: 2012-10-24
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the production of bio-oil by using duckweed as raw material through hydrothermal treatment, and the relevant research is scarce.

Method used

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  • Method for preparing bio-oil by treating duckweed biomass by using hydrothermal method
  • Method for preparing bio-oil by treating duckweed biomass by using hydrothermal method
  • Method for preparing bio-oil by treating duckweed biomass by using hydrothermal method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] The dried duckweed is pulverized in a pulverizer to obtain fine duckweed particles. Weigh 2.5g of the treated duckweed, put it in a 25ml autoclave, add 16.9ml of water, without catalyst, and seal it. Put the autoclave into the molten salt, control the temperature at 270°C, and the duration is 60min. After the reaction is completed, quickly cool with water, open the reactor, and collect the mixture in the reactor. The reaction mixture was extracted with an organic solvent, separated and filtered to obtain an organic phase, and the organic solvent was removed by rotary evaporation to obtain bio-oil with a bio-oil yield of 5.4%.

Embodiment 2

[0028] The dried duckweed is pulverized in a pulverizer to obtain fine duckweed particles. Weigh 2.5g of the treated duckweed, put it in a 25ml autoclave, add 15.1ml of water, without catalyst, and seal it. Put the autoclave into the molten salt, control the temperature at 290°C, and the duration is 60min. After the reaction is completed, quickly cool with water, open the reactor, and collect the mixture in the reactor. The reaction mixture was extracted with an organic solvent, separated and filtered to obtain an organic phase, and the organic solvent was removed by rotary evaporation to obtain bio-oil with a bio-oil yield of 9.7%.

Embodiment 3

[0030] The dried duckweed is pulverized in a pulverizer to obtain fine duckweed particles. Weigh 2.5g of the treated duckweed, put it in a 25ml autoclave, add 14.1ml of water, without catalyst, and seal it. Put the autoclave into the molten salt, control the temperature at 310°C, and the duration is 60min. After the reaction is completed, quickly cool with water, open the reactor, and collect the mixture in the reactor. The reaction mixture was extracted with an organic solvent, separated and filtered to obtain an organic phase, and the organic solvent was removed by rotary evaporation to obtain bio-oil with a bio-oil yield of 12.0%.

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Abstract

The invention relates to a new method for preparing bio-oil by treating duckweed biomass by using a hydrothermal method. The method is characterized by comprising the following steps of: (1) grinding dry duckweeds in a grinder to obtain fine duckweed particles; (2) weighing the treated duckweeds and putting the weighed duckweeds in a high-pressure reactor and adding water to react; and (3) extracting a mixture obtained through reaction by using organic solvents, separating and filtering extracts to obtain an organic phase, and carrying out rotary evaporation to remove the organic solvents, so as to obtain the bio-oil. The method for preparing the bio-oil with a duckweed biomass as a raw material has the beneficial effects that the raw material has high photosynthesis efficiency, strong adaptive capability to environment, short growth cycle, low energy consumption, little early-stage investment and low cost, is easy to cultivate in a large scale, does not occupy farmlands and relieves dependence on fossil fuel; besides, the high-moisture duckweeds do not need to be dried in a hydrothermal process, so that the energy consumption in early-stage treatment is low; and therefore, the method has good economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of new energy, and relates to a new method for preparing bio-oil by treating duckweed with a hydrothermal method. Background technique [0002] With the gradual depletion of fossil fuels and the aggravation of environmental pollution caused by the use of fossil fuels, it is imminent to seek renewable and pollution-free 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. Among them, duckweed, as an important renewable biomass, has attracted increasing attention due to its high photosynthetic efficiency, strong environmental adaptability, short growth cycle, easy large-scale breeding, low cost, and no occupation of cultivated land. Therefore, the utilization and transformation technology of duckweed has not only become a new direction in the international new ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00
Inventor 段培高常周凡许玉平白秀军王枫
Owner HENAN POLYTECHNIC UNIV
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