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Method for preparing fuel from light bio-oil

A bio-oil, light-weight technology, applied in the direction of fuel, liquid carbon-containing fuel, petroleum industry, etc., can solve the problems of poor selectivity, dispersion of target products, low conversion rate of light bio-oil, etc., to reduce hydrogen consumption and simple operation , the effect of not easy to coke

Inactive Publication Date: 2021-06-08
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the method for preparing high-quality ether fuels by modifying and upgrading light bio-oil provided by the present invention, compared with the traditional method of catalytic upgrading of light bio-oil, this method is significantly Two-step process, first pre-elevating the light bio-oil, and then adding ethers to the pre-extracted oil, so as to solve the low conversion rate of light bio-oil caused by directly using light bio-oil as raw material , the problem of target product dispersion and poor selectivity, and the substances produced by this method are mainly ethers, so compared with alcohols, the combustion performance is better

Method used

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  • Method for preparing fuel from light bio-oil

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The method for preparing fuel from bio-oil of the present invention, such as figure 1 As shown, the specific steps are as follows:

[0032] Step 1: pre-upgrade the light bio-oil and turn it into alcohols. Specifically, the following operations can be used:

[0033] The light bio-oil was placed in a catalytic upgrading system for hydrocatalytic treatment. The reaction pressure was 6 MPa, the reaction temperature was 140 °C, the reaction time was 4 h, and the catalyst was Raney Ni. In this step, the mass ratio of light bio-oil to catalyst is 20:1.

[0034] After the reaction, the temperature of the system is lowered to normal temperature, and the reactants are taken out and filtered to obtain pre-upgraded bio-oil rich in alcohols.

[0035] Step 2: the alcohol substance that becomes becomes ether substance. Specifically, the following operations can be used:

[0036] Put the pre-upgraded oil in the catalytic upgrading system again, and add isobutene and catalyst Amber...

Embodiment 2

[0039] The method for preparing fuel from bio-oil of the present invention, see figure 2 As shown, the specific steps are as follows:

[0040] Step 1: Prepare light bio-oil by pyrolysis using pine wood raw material.

[0041] Step 2: Put the collected light bio-oil in the catalytic upgrading system for hydrocatalytic treatment, the reaction pressure is 7 MPa, the reaction temperature is 120 °C, the reaction time is 6 h, and the catalyst is Raney Ni. The mass ratio of light bio-oil to catalyst is 15:1. After the reaction, the temperature of the system is lowered to normal temperature, and the reactants are taken out and filtered to obtain pre-upgraded bio-oil rich in alcohols.

[0042] Step 3: Place the pre-upgraded oil in the catalytic upgrading system again, and add octene and catalyst Amberlyst-15 at the same time to carry out addition reaction. The reaction temperature is 80°C, the reaction time is 3 hours, and after the reaction of the pre-upgraded oil and octene at a m...

Embodiment 3

[0044] The method for preparing fuel from bio-oil of the present invention, see image 3 As shown, the specific steps are as follows:

[0045] Step 1: Prepare light bio-oil by using pine raw material, the steps are as follows:

[0046] The pine wood raw material was dried for 12 hours in a blast drying oven at a temperature of 105°C, and the dried pine wood was pyrolyzed in a vertical furnace at a temperature of 450-550°C. In this example, the pyrolysis temperature Using 500°C, N 2 The flow rate is 0.45L / min, and the holding time is 1.5 h. The bio-oil produced during the pyrolysis process is passed through the device first image 3 After the middle spray system removes the heavy components, the light bio-oil is collected through the condensation system, and after the collection is completed, it is purified through the tail gas treatment system.

[0047] Step 2: Put the collected light bio-oil in the catalytic upgrading system for hydrocatalytic treatment, the reaction pres...

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Abstract

The invention discloses a method for preparing fuel from light bio-oil, which is characterized by comprising the following steps of 1, changing the light bio-oil into an alcohol substance, and 2, converting the obtained alcohol substance into an ether substance. In the step 2, a method for changing the changed alcohol substance into the ether substance is as follows: liquid olefin containing double bonds is added into the changed alcohol substance, and the high-quality ether substance is generated through an addition reaction. The bio-oil is subjected to an addition reaction to generate a high-quality ether substance which is used as an oxygen-containing additive. According to the method, the molecular weight of each component in the light bio-oil can be improved, and the combustion performance of the light bio-oil is improved, so that the utilization value of the light bio-oil is improved; and the problems of low efficiency and poor product selectivity caused by direct catalytic upgrading due to complex light bio-oil components can be well solved.

Description

technical field [0001] The invention belongs to the field of bio-oil catalytic upgrading, and in particular relates to a method for preparing high-quality ether fuels by modifying and upgrading light bio-oil. Background technique [0002] Bio-oil refers to an opaque, dark reddish-brown or black liquid with a special pungent odor obtained by pyrolyzing biomass under air-isolated conditions. It has the characteristics of wide source of raw materials, renewable, easy storage and transportation, and is a potential source of chemical and liquid fuels. Although bio-oil has great potential value, it still has many shortcomings such as poor stability, strong acidity, high viscosity, high oxygen content and low energy density. To achieve higher utilization value, it must be catalytically upgraded. [0003] At present, there are many methods for upgrading bio-oil, mainly hydrodeoxygenation, catalytic cracking, etc. These methods are generally carried out at high temperature, so the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/02
CPCC10L1/02C10L2200/0476
Inventor 张会岩赵勃周敬皓肖睿
Owner SOUTHEAST UNIV
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