A method for improving the yield of lignin pyrolysis oil and adjusting the composition of pyrolysis oil

A technology for lignin and pyrolysis oil, which is applied in the petroleum industry, processing hydrocarbon oil, preparation of liquid hydrocarbon mixture, etc. To achieve the effect of simple process, reduced content of condensed aromatic hydrocarbons and furans, and low cost

Active Publication Date: 2017-04-05
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to many problems such as complex structure, uneven physical and chemical properties, difficulty in separation and extraction, and easy condensation of lignin, it has not been well utilized so far.

Method used

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  • A method for improving the yield of lignin pyrolysis oil and adjusting the composition of pyrolysis oil
  • A method for improving the yield of lignin pyrolysis oil and adjusting the composition of pyrolysis oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 1.0 g of moso bamboo EMAL lignin and pour it into a porcelain boat, and place the porcelain boat at one end of the quartz tube in the tube furnace. During the pyrolysis test, turn on the heating power, set the temperature of the furnace body to 600°C, and inject high-purity nitrogen (99.999%, flow rate 0.5L / min) for 30 minutes to blow out the air in the quartz tube. When heated to the preset temperature, after the temperature is constant, the porcelain boat containing the sample is quickly pushed to the center of the quartz tube in the tube furnace for pyrolysis reaction, and the reaction time is 2 minutes. The pyrolysis product was collected by cold trap trapping method, the high-purity nitrogen flow rate was adjusted to 1.2L / min, the volatile matter in the carrier gas was passed into the Monterey washing bottle placed in the ice-salt bath, and 500mL methanol was used as the Absorbs solvents. The non-condensable gas is quantitatively measured by the gas collecti...

Embodiment 2

[0021] Weigh 1.0g of EMAL lignin from moso bamboo and place it in an agate mortar, add 0.01g of copper oxide powder, after grinding, pour the mixture into a porcelain boat, and the rest of the steps are the same as in Example 1. After analysis, the gas phase product yield was 27.86%, the solid phase product yield was 25.75%, and the liquid phase product yield was 46.39%. After the liquid phase product was analyzed by GC-MS, the peak area percentage of fused ring aromatics was 12.43%, the peak area percentage of benzofurans was 10.75%, and the peak area percentage of phenols was 41.89%.

Embodiment 3

[0023] Weigh 1.0g of EMAL lignin from moso bamboo and place it in an agate mortar, then add 0.05g of copper oxide powder, after grinding, pour the mixture into a porcelain boat, and the rest of the steps are the same as in Example 1. After analysis, the gas phase product yield was 20%, the solid phase product yield was 25.9%, and the liquid phase product yield was 54.1%. After the liquid phase product was analyzed by GC-MS, the peak area percentage of condensed ring aromatics was 8.77%, the peak area percentage of benzofurans was 8.72%, and the peak area percentage of phenols was 56.43%.

[0024] figure 1 For embodiment 1-3 pyrolysis product three component yield analysis, figure 2 For pyrolysis oil composition analysis.

[0025] From figure 1 It can be clearly seen that with the increase of copper oxide addition, the yield of liquid phase products in pyrolysis products increases significantly, while from figure 2 It can be seen that the content of fused ring aromatics a...

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Abstract

The invention discloses a method for increasing the yield of lignin pyrolysis oil and adjusting the composition of pyrolysis oil. The method comprises the steps of fully mixing lignin serving as a raw material with an additive, setting the pyrolysis reaction temperature to be 400-700 DEG C, feeding high-purity nitrogen, exhausting air in a reactor, putting a mixture into a temperature control region of a pyrolyzer in the reactor when the temperature in the reactor reaches the set temperature, controlling the pyrolysis time to be 2-5min, blowing tar generated by pyrolysis to a monteggia washing bottle with a certain amount of methyl alcohol by high-purity nitrogen to collect liquid phase products, collecting noncondensable gas by a saturated salt water drain method, performing natural cooling after the reaction is ended, and collecting solid products. By the full mixing of the additive and the lignin, the yield of lignin pyrolysis oil is increased, and the composition of the pyrolysis oil is adjusted, so that the content of condensed aromatics in the obtained pyrolysis oil is obviously reduced.

Description

technical field [0001] The invention relates to the technical field of new energy, in particular to a method for increasing the yield of lignin pyrolysis oil and adjusting the composition of pyrolysis oil. Background technique [0002] Biomass is the only renewable energy source capable of simultaneously providing gaseous, liquid and solid fuels. Because liquid products have the advantages of convenient storage, transportation and high energy density, based on this, the large-scale and modern utilization of biomass resources can be realized, and it is expected that biomass resources will become an important alternative energy source when fossil fuels are insufficient in the future . Although the current quality, stability and production cost of bio-oil cannot be compared with traditional mineral fuel oil, with the development of biomass pyrolysis liquefaction technology and various technologies to improve the stability of bio-oil, as well as the application of bio-oil With...

Claims

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Application Information

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IPC IPC(8): C10G1/00
CPCC10G1/002C10G2300/1011C10G2300/1037C10G2300/201
Inventor 武书彬程皓
Owner SOUTH CHINA UNIV OF TECH
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