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Method for preparing chemicals containing phenols and aromatic hydrocarbons from bio-oil pyrolysis lignin through catalysis

A kind of aromatic hydrocarbons, catalytic preparation technology, applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process and other directions, can solve the problems of bio-oil pyrolysis lignin processing and utilization without efficient and mature and stable technical means, to achieve added value of products High, improve energy value, the effect of simple process

Active Publication Date: 2015-05-06
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no efficient and mature and stable technical means for the processing and utilization of bio-oil pyrolysis lignin

Method used

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  • Method for preparing chemicals containing phenols and aromatic hydrocarbons from bio-oil pyrolysis lignin through catalysis
  • Method for preparing chemicals containing phenols and aromatic hydrocarbons from bio-oil pyrolysis lignin through catalysis

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Taking the bio-oil obtained by fast pyrolysis of Pinus sylvestris as an example, the implementation process of the present invention is introduced as follows:

[0024] (1) Take 100g of bio-oil, add 500g of distilled water slowly, stir and filter to obtain 35g of water-insoluble matter; freeze the water-insoluble matter at -60°C under 10Pa vacuum condition for 8 hours, and obtain 15g of solid pyrolytic lignin after drying;

[0025] (2) Dissolve the obtained solid pyrolytic lignin in 25g of dioxane with a mass percentage of 85%, then add 40g of methanol, add 5g of Ru / HZSM-5 catalyst, mix well, and move it into a high-pressure reactor;

[0026] (3) Use hydrogen to replace the air in the reactor twice, and then fill it with 2MPa hydrogen to maintain a reducing atmosphere, start the hydrocracking reaction, the reaction pressure is 5MPa, the reaction temperature is 250°C, and the depolymerization reaction is maintained for 2.5h;

[0027] (4) Filter the above reaction mixture,...

Embodiment 2

[0030] Taking the bio-oil obtained by fast pyrolysis of Pinus sylvestris pine bark as an example, the implementation process of the present invention is introduced as follows:

[0031] (1) Take 100g of bio-oil, slowly add 500g of distilled water, stir and filter to obtain 42g of water-insoluble matter; freeze the water-insoluble matter at -40°C for 12 hours under vacuum conditions of 15Pa, and obtain 21g of solid pyrolytic lignin after drying;

[0032] (2) Dissolve the obtained solid pyrolytic lignin in 40g of dioxane with a mass percentage of 96%, then add 50g of ethanol, add 7g of Ru / HZSM-5 catalyst, mix well, and move it into a high-pressure reactor;

[0033] (3) Use hydrogen to replace the air in the reactor twice, and then fill it with 3MPa hydrogen to maintain a reducing atmosphere, start the hydrocracking reaction, the reaction pressure is 15MPa, the reaction temperature is 350°C, and the depolymerization reaction is maintained for 3h;

[0034] (4) Filter the above reac...

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Abstract

The invention relates to a method for preparing chemicals containing phenols and aromatic hydrocarbons from bio-oil pyrolysis lignin through catalysis, and belongs to the technical field of biomass energy. The method comprises the following steps of: firstly, washing the bio-oil by using water to obtain a water-phase component and a water insoluble matter, freeze-drying the water insoluble matter to obtain solid-state pyrolysis lignin, dissolving the solid-state pyrolysis lignin in dioxane and then orderly adding methanol or ethanol and a Ru / HZSM-5 catalyst, mixing evenly, and moving the mixture into a hydrogen replacement reaction kettle for a hydrocracking reaction to obtain a reaction mixed liquid; filtering the reaction mixed liquid, calcining the filter residue to be reused as the Ru / HZSM-5 catalyst, performing decompressed rotary distillation on the filtrate to obtain the chemicals containing phenols and aromatic hydrocarbons, and recycling methanol or ethanol obtained through distillation. The method provided by the invention is capable of effectively degrading the pyrolysis lignin in the bio-oil into low-molecular-weight chemicals and fuel additives; the method is simple in process and high in product value added; as a result, the market prospect of the bio-oil is effectively expanded.

Description

technical field [0001] The invention relates to a method for catalyzing bio-oil pyrolysis lignin to prepare chemicals containing phenols and aromatic hydrocarbons, and belongs to the technical field of biomass energy. Background technique [0002] At present, fossil fuels represented by petroleum and coal are increasingly in short supply, and there are problems such as high pollution and high energy consumption during their use. Therefore, it is necessary to actively develop clean and renewable alternative energy sources. Biomass is the only renewable resource that can be turned into liquid fuel, and it has been widely valued by countries all over the world. Biomass pyrolysis liquefaction technology can efficiently convert low-grade, dispersed solid biomass into liquid bio-oil that is easy to store and transport, which can be used to prepare chemical products and fuels. [0003] However, when bio-oil is used as a fuel or chemical intermediate product, there are still proble...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/14
Inventor 任学勇常建民王文亮司慧苟进胜李强
Owner BEIJING FORESTRY UNIVERSITY
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