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Refining method for bio-oil

A bio-crude oil and refining method technology, applied in the field of new energy research, can solve the problems of hydrothermal deactivation of catalysts, shortening the service life of catalysts, difficult separation, etc., so as to prolong the service life, avoid hydrothermal deactivation, and achieve good extraction effect. Effect

Inactive Publication Date: 2013-11-27
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main disadvantages of this method are: the solvents (tetralin and methanol) used have poor dissolving effect, are easy to participate in the catalytic cracking reaction, and are difficult to separate from the product; a kind of refining method for on-line catalytic cracking bio-crude oil proposed by Williams et al. (Paul T. Williams and Patrick A. Horne. Characterization of oils from the fluidised bed pyrolysis of biomass with zeolite catalyst upgrading. Biomass and Bioenergy. 1994(7):223-236)
The main disadvantages of this method are: biomass pyrolysis steam contains a large amount of water vapor, which will cause hydrothermal deactivation of the catalyst at high temperature, shorten the service life of the catalyst, and the product has a high oxygen content

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  • Refining method for bio-oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] During the test, first add 150ml (168g) of bio-crude oil (the water content of bio-crude oil is 32.4%) in extraction reactor 1, then add 450ml of dichloromethane, stir and let stand for 10min, utilize separation pump to extract the dichloromethane phase Separation to the liquid storage tank (the amount of organic matter extracted by dichloromethane accounts for 63.5% of the bio-crude oil). Utilize micro metering pump to squeeze above-mentioned extraction phase into the fixed-bed catalytic cracking reactor that catalyst [catalyst is HZSM-5 zeolite molecular sieve, silicon-aluminum ratio is 50, (provided by Tianjin Nankai molecular sieve factory)] is housed, with nitrogen as carrier gas, its flow rate is 40ml / min; the ratio of extract phase feed rate to catalyst mass is 5h -1 , the catalytic cracking temperature is 500°C, after cooling and evaporating to remove the extractant, the target product (refined bio-oil) is obtained with a yield of 42.75% and an oxygen content of...

Embodiment 2

[0029] During the test, firstly add 150ml (168g) bio-crude oil (the water content of bio-crude oil is 32.4%) to the extraction reactor, then add 600ml dichloromethane, stir and let it stand for 15min, use the separation pump to separate the dichloromethane extraction phase To the liquid storage tank (the amount of organic matter extracted by dichloromethane accounts for 64.2% of the bio-crude oil). Utilize micro metering pump to squeeze above-mentioned extraction phase into the fixed-bed catalytic cracking reactor that catalyst [catalyst is HZSM-5 zeolite molecular sieve, silicon-aluminum ratio is 50, (provided by Tianjin Nankai molecular sieve factory)] is housed, with nitrogen as carrier gas, its flow rate is 40ml / min; the ratio of the feed rate of the extract phase to the mass of the catalyst is 8h -1 , the catalytic cracking temperature is 600°C, after cooling and evaporating to remove the extractant, the target product (refined bio-oil) is obtained with a yield of 38.77% ...

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Abstract

The invention discloses a refining method for bio-oil, which comprises the following steps: A, extracting bio-oil for 5-15 min by utilizing extraction agent of 3-5 times of the volume, and separating the bio-oil which is divided into water phase and extraction phase to obtain the extraction phase; B, utilizing a micro-metering pump to conduct jetting atomization on the extraction phase obtained in the step A, entering the extraction phase being subjected to jetting atomization into a reactor with the carrying of inert gas, and cooling after being subjected to catalytic cracking at the temperature of 300-600 DEG C to obtain refined product; C, moving the refined product obtained in the step B to water bath with the temperature of 40 DEG C to remove residual extraction agent until the quality of the product is constant to obtain refined oil. The method has the mainly advantages that: (1) the extraction effect is better, the quality of extracted organic matter makes up 60%-70% of the bio-oil; (2) the problem that the hydrotherm of HZSM-5 is inactivated during catalytic pyrolysis process is better solved; (3) the problems that solvent participates in the catalytic cracking reaction and is difficult to be removed after refining are avoided; (4) the quality of the refined oil is improved.

Description

technical field [0001] The invention belongs to the field of new energy research, and more specifically relates to a method for refining biological crude oil. technical background [0002] With the continuous development of the world economy, a large amount of fossil energy has been continuously consumed, resulting in the depletion of energy and the increasingly serious environmental pollution. Biomass energy is the energy stored by green plants through photosynthesis. It has large reserves, renewable, low sulfur content, CO 2 With advantages such as zero emission, it can be used as an alternative energy source for fossil energy. [0003] The technology of biomass pyrolysis to obtain bio-oil has been developed rapidly since it was proposed in the 1980s. (Yi Weiming, Bai Xueyuan, He Fang, etc., "Research and Development of Biomass Pyrolysis and Liquefaction Technology", Journal of Agricultural Engineering, 2003, 28(Suppl.): 172-176). [0004] However, due to the characteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06
Inventor 蔡忆昔樊永胜李小华赵卫东俞宁尹海云
Owner JIANGSU UNIV