Method for refining pyrolysis lignin in biological oil

A technology for pyrolyzing lignin and bio-oil, which is applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., and can solve the problems of coking, poor stability, and low cracking efficiency of pyrolyzed lignin

Inactive Publication Date: 2010-11-24
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the bio-oil currently produced has the following disadvantages: high viscosity, poor stability, strong corrosion, high polarity, and low calorific value
[0006] However, the current research on pyrolytic lignin is still mainly on the confirmation and discussion of its structure. The catalysts used in its catalytic cracking are mostly small-pore zeolite molecular sieve catalysts such as CoMo / HZSM-5, and the yield of cracking liquid is low. The cracking efficiency is low, and during the cracking process, the pyrolysis lignin is seriously coked, and the catalyst is deactivated in large quantities

Method used

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  • Method for refining pyrolysis lignin in biological oil
  • Method for refining pyrolysis lignin in biological oil
  • Method for refining pyrolysis lignin in biological oil

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Experimental program
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Effect test

Embodiment 1

[0026] Weigh 1 part of pyrolytic lignin and 11 parts of ethanol and put it into a 150mL autoclave, then drop into 0.5 part of catalyst (3%Ru / ZrO 2 / SBA-15, denoted as RuZr). Replace the air in the kettle with hydrogen for three to four times, and then fill it with 2MPa hydrogen to minimize the air content in the kettle, especially the oxygen content, so as to maintain the reducing atmosphere in the kettle. Turn on the stirring device to about 1000 rpm, then heat to 150° C. and maintain it for 8 hours. After the reaction was finished, it was cooled to room temperature, and liquid, gas and solid products were collected. Liquid and gaseous products were analyzed for their chemical composition by GC-MS and GC. Its result is: liquid yield is 88.85%; Solid yield is 3.60%; Gas yield is 7.55%; Pyrolytic lignin cracking is the yield of liquid organic matter, i.e. the yield of pyrolysis oil (Y oil ) and calorific value are 53.08% and 26.33MJ / Kg respectively.

Embodiment 2

[0028] Weigh 1 part of pyrolytic lignin and 11 parts of ethanol and put it into a 150mL autoclave, then drop into 0.5 part of catalyst (3%Ru / ZrO 2 / SBA-15, denoted as RuZr). Replace the air in the kettle with hydrogen for three to four times, and then fill it with 2MPa hydrogen to minimize the air content in the kettle, especially the oxygen content, so as to maintain the reducing atmosphere in the kettle. Turn on the stirring device to about 1000 rpm, then heat to 200°C and maintain it for 8 hours. After the reaction was finished, it was cooled to room temperature, and liquid, gas and solid products were collected. Liquid and gaseous products were analyzed for their chemical composition by GC-MS and GC. Its result is: liquid yield is 85.29%; Solid yield is 3.25%; Gas yield is 11.46%; Pyrolytic lignin cracking is the yield of liquid organic matter, i.e. the yield of pyrolysis oil (Y oil ) and calorific value are 56.77% and 26.84MJ / Kg respectively.

Embodiment 3

[0030] Weigh 1 part of pyrolytic lignin and 11 parts of ethanol and put it into a 150mL autoclave, then drop into 0.5 part of catalyst (3%Ru / ZrO 2 / SBA-15, denoted as RuZr). Replace the air in the kettle with hydrogen for three to four times, and then fill it with 2MPa hydrogen to minimize the air content in the kettle, especially the oxygen content, so as to maintain the reducing atmosphere in the kettle. Turn on the stirring device to about 1000 rpm, then heat to 260° C. and maintain it for 8 hours. After the reaction was finished, it was cooled to room temperature, and liquid, gas and solid products were collected. Liquid and gaseous products were analyzed for their chemical composition by GC-MS and GC. Its result is: liquid yield is 86.91%; Solid yield is 0.30%; Gas yield is 12.79%; Pyrolytic lignin cracking is the yield of liquid organic matter, i.e. the yield of pyrolysis oil (Y oil ) and calorific value are 99.51% and 31.96MJ / Kg respectively.

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Abstract

The invention provides a method for refining pyrolysis lignin in biological oil through cracking, which comprises the following steps of: a) washing the biological oil to obtain the pyrolysis lignin; b), adding alcohols into the pyrolysis lignin, and adding a catalyst with the hydrocracking function in an acidic environment; and c), performing hydrocracking at the reaction temperature of between 80 and 400 DEG C under the reactive pressure of between 0.1 and 30 MPa in the reducing atmosphere to obtain high-grade stable and volatile fuel. The method has the characteristics of high yield of cracking liquid, high cracking efficiency and difficult coking of the pyrolysis lignin.

Description

technical field [0001] The invention relates to a method for refining bio-oil, in particular to a method for refining pyrolysis lignin in bio-oil into high-grade liquid fuel. Background technique [0002] Human beings have an increasing demand for energy, but the fossil fuels represented by petroleum and coal are in short supply and cause serious environmental pollution during use. Therefore, it is necessary to develop clean and renewable new energy sources. Biomass, as the only renewable energy that can be directly converted into gas, liquid and solid fuel, has the advantages of low pollution, wide distribution and large reserves. The development of biomass renewable energy has become a research hotspot in the world today. Among them, pyrolysis biomass process can obtain high value-added liquid fuels and chemicals, and rapid pyrolysis can obtain more than 70% liquid products, that is, bio-oil, which has the potential to replace petroleum products. [0003] However, the cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
Inventor 张颖唐喆郭庆祥朱锡锋
Owner UNIV OF SCI & TECH OF CHINA
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