Method for efficiently preparing biological oil by liquefying with water-hydrogen donor mixed solvent

A technology of mixing solvent and bio-oil, which is applied in the preparation of liquid hydrocarbon mixture, petroleum industry, processing of hydrocarbon oil, etc., to achieve the effects of low reaction pressure, mild liquefaction conditions, and widening and diversified utilization.

Inactive Publication Date: 2015-02-04
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, compared with a large number of liquefaction reactions using tetralin as a solvent, there is no research report using water-tetralin mixed solvent as a liquefaction medium. Therefore, the liquefaction mechanism of water-tetralin mixed solvent , which has important guiding significance for promoting the improvement of biomass liquefaction efficiency and the production of bio-oil

Method used

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  • Method for efficiently preparing biological oil by liquefying with water-hydrogen donor mixed solvent

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Raw material preparation

[0031] Take the bagasse that has been accumulated and stored outside the Pumiao Paper Mill of Nanning Sugar Industry Co., Ltd. for more than 1 year. It is dried in the sun, pulverized, passed through a 20-80 mesh sieve, and dried at 110° C. for 24 hours.

[0032] (2) Liquefaction experiment

[0033] 1. Using water, tetrahydronaphthalene and water-tetrahydronaphthalene mixed solvent (water / tetrahydronaphthalene mass ratio is 1:1) as the liquefaction medium respectively, add 30 grams of dry bagasse and 240 grams of liquefaction solvent into the reaction kettle together, After evacuating the air in the kettle with hydrogen for 3 times, raise the temperature to the predetermined reaction temperature of 200-320℃ at a heating rate of 5°C / min, and liquefy at a constant temperature for 1.5 hours under the condition of a stirring rate of 300rpm; after the reaction, the reaction kettle is cooled to room temperature. Slowly open the exhaust valve ...

Embodiment 2

[0035] (1) raw material preparation: with embodiment 1.

[0036] (2) Liquefaction experiment

[0037]Dry 30 grams of bagasse and 240 grams of water-tetrahydronaphthalene mixed solvent (water / tetrahydronaphthalene mass ratio is respectively 1:0, 9:1, 1:1, 1:9, 1:14 and 0:1) together Put it into the reaction kettle, use hydrogen to evacuate the air in the kettle for 3 times, raise the temperature to the predetermined reaction temperature of 300°C at a heating rate of 5°C / min, and liquefy at a constant temperature for 0.8 hours under the stirring condition of 300rpm. The steps after the reaction are the same as in the example 1. Experimental result shows: when tetralin content surpasses 50% in the mixed solvent, bagasse transformation rate remains on 86~87%, is all higher than using water alone as solvent liquefaction (67%) and tetralin as solvent liquefaction (84%) while the bio-oil yield was maintained at 24 to 34%, and when the tetrahydronaphthalene content was 50%, the bio-...

Embodiment 3

[0039] (1) raw material preparation: with embodiment 1.

[0040] (2) Liquefaction experiment

[0041] Weigh 30g of dry bagasse and NaOH with an amount of 0.1-4.0% of the amount of bagasse. NaOH is first made into an alkali solution with 120 grams of water, then pour the bagasse and alkali solution into a polyethylene sealed bag and mix well, and seal the mouth of the bag , placed at room temperature for 23 hours. Add the bagasse after alkaline immersion into the reaction kettle together with the lye and 120 grams of water. After evacuating the air in the kettle with hydrogen for 3 times, raise the temperature to the predetermined reaction temperature of 300℃ at a heating rate of 5℃ / min, and stir at 300rpm Liquefied at a constant temperature for 1 hour under the conditions, and the steps after the reaction were the same as in Example 1. As the amount of NaOH increased from 0.1% to 4.0%, the conversion increased from 70.4% to 98.9%; the yield of bio-oil increased from 20% to 4...

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Abstract

The invention discloses a method for efficiently preparing biological oil by liquefying with a water-hydrogen donor mixed solvent. The method comprises the following steps: simultaneously adding sundried, crushed, sieved and dried bagasse and a tetrahydronaphthalene mixed solvent into a reaction kettle, stirring at 200-320 DEG C and liquefying for 0.5-1.5 hours under the anaerobic condition; cooling the reaction kettle body and releasing pressure of the reaction kettle body after the reaction is ended, opening the kettle, pouring solid and liquid products out of the reaction kettle, and carrying out low-pressure suction filtration to separate the liquid product from residue; successively washing the reaction kettle and the filtration residue by dichloromethane and acetone for a plurality of times, and successively carrying out reduced pressure distillation on dichloromethane washing liquid and acetone washing liquid at 30 DEG C and 70 DEG C to evaporate solvent and water in the product so as to obtain bagasse biological oil. By virtue of the method of preparing the biological oil by carrying out alkaline leaching pretreatment on the bagasse with a low-concentration alkali solution and liquefying with the water-tetrahydronaphthalene mixed solvent, the bagasse liquefying efficiency comprising the bagasse conversation rate and the biological oil yield is greatly improved; the conversation rate reaches over 98%; the biological oil yield reaches over 40%.

Description

technical field [0001] The invention relates to a method for preparing bio-oil, in particular to a method for efficiently preparing bio-oil by liquefying a water-hydrogen donor mixed solvent. Background technique [0002] Today, the global environment is deteriorating and fossil fuels, especially oil resources, are becoming more and more tense. Renewable utilization can realize CO 2 The research and development of zero-emission biomass clean energy has become the consensus of the people. Liquid fuels derived from biomass mainly include biocrude oil, bioethanol and biodiesel. Most of the raw materials used in bioethanol and biodiesel come from food-based biomass such as corn and soybeans. Due to many reasons such as occupying cultivated land and competing with human food chains, their development is restricted. Biocrude oil, also known as bio-oil or bio-fuel, can be prepared from most biomass and its wastes, such as fast-growing eucalyptus, straw, cassava bagasse and bagass...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00
CPCC10G1/00C10G2300/1014
Inventor 李志霞操江飞赖芳沈芳陈丛瑾黄祖强
Owner GUANGXI UNIV
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