Method for separating and modifying biomass cracking oil to modified biological oil

A technology of biomass pyrolysis oil and bio-oil, which is applied in the field of separation and modification of pyrolysis oil, can solve the problem of not effectively improving the oxygen content, water content, calorific value and combustion performance of bio-oil, and the corrosion and catalytic effects of emulsified oil on engines. Problems such as the complexity of hydrogenation equipment, to achieve the effect of increasing heat utilization, increasing the rate of esterification reaction, and improving storage stability

Inactive Publication Date: 2008-03-19
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, catalytic hydrogenation equipment is generally more complex and costly, and it is also prone to reactor blockage and catalyst deactivation during operation; catalytic cracking generally has a low yield, and there is still no good selectivity, high conversion rate, Catalyst with low coking rate; adding solvents such as methanol and ethanol can reduce the viscosity of bio-oil, and also reduce the acidity of oil, increase the volatile matter and calorific value of bio-oil, which is a commonly used method for stabilizing bio-oil, but simply adding solvent It cannot effectively improve the oxygen content, water content, calorific value and combustion performance of bio-oil; the emulsification method does not require too many chemical conversion operations, but the cost of emulsification and the energy input required for emulsification are relatively large; in addition, as automobile oil, The corrosion of emulsified oil is serious to the engine
As a result, none of the above techniques are currently widely adopted

Method used

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  • Method for separating and modifying biomass cracking oil to modified biological oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 50g of biomass pyrolysis oil, 30g of absolute ethanol, and 1g of concentrated sulfuric acid into the still of a rectification tower with an inner diameter of Ф24mm and a filling height of 600mm, and heat to reflux. At this time, the temperature of the tower is about 80-85°C , the temperature at the top of the tower is about 70-75°C. Using a dropping funnel, 20g of hydrogen peroxide solution with a mass fraction of 30% is added dropwise to the reactor at a rate of 10ml / min. When it reached 47°C, it was fully refluxed for 2 hours. When the temperature at the top of the rectification tower is less than 55°C, use the reflux ratio of 1:1 to extract 12.4 grams of light oil, 10.2 grams of transition components at 55-78°C, and recover ethanol at 78-79°C 22.7 grams. The liquid in the tower kettle was cooled, and the phases were separated to obtain 13.4 grams of an oil phase, which was dissolved in 7 grams of ethanol to obtain a heavy oil.

Embodiment 2

[0020] Add 50g of biomass pyrolysis oil, 100g of absolute ethanol, and 1g of concentrated sulfuric acid into the still of a rectification tower with an inner diameter of Ф24mm and a filling height of 1000mm, heat to reflux, and use a dropping funnel to dissolve 30% of the mass fraction 20g of hydrogen peroxide solution was added dropwise to the reaction kettle at a rate of 10ml / min, and the total reflux was performed for 15 minutes after the dropwise addition, and the total reflux was performed for 2 hours when the tower top temperature reached 47°C. When the temperature at the top of the rectification tower is less than 55°C, use the reflux ratio of 1:1 to extract 10.3 grams of light oil, 12.3 grams of transition components at 55-78°C, and recover ethanol at 78-79°C 88.2 grams. The liquid in the tower kettle was cooled, and the phases were separated to obtain 13.7 grams of oil phase, which was dissolved in 7 grams of ethanol to obtain heavy oil.

Embodiment 3

[0022] Add 50g of biomass pyrolysis oil, 60g of absolute ethanol, and 1g of concentrated sulfuric acid into the still of a rectification tower with an inner diameter of Ф24mm and a filling height of 800mm, heat to reflux, and use a dropping funnel to dissolve 30% of the mass fraction of 20g of hydrogen peroxide solution was added dropwise to the reactor at a rate of 10ml / min, and refluxed for 15min after the dropwise addition was completed. When the temperature at the top of the rectification tower is less than 55°C, use the reflux ratio of 1:1 to extract 11.3 grams of light oil, 11.4 grams of transition components at 55-78°C, and recover ethanol at 78-79°C 48.5 grams. The liquid in the tower kettle was cooled, and the phases were separated to obtain 13.6 grams of oil phase, which was dissolved in 7 grams of ethanol to obtain heavy oil.

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Abstract

The invention discloses a method for separating and modifying the pyrolysis bio-oil into modified bio-oil includes the following steps: A, according to the mass ratio of mbio-oil:methanol:moxidant:macidic catalyst is equal to 50-150:30-100:20-100:1, pyrolysis bio-oil, anhydrous alcohol and acidic catalyst with 20-30 percent by mass of water are added into a tower reactor of a distillation tower and heated to refluxing state, the oxidants is added drop by drop into the reactor through a dropping funnel followed by refluxing for 15min, and when the temperature of the tower top is decreased to 47-55 DEG C, total reflux is proceeded for 2h; B, after total reflux, three sets of fractions: below 55 DEG C fraction, 55-78 DEG C fraction, and 78-79 DEG C fraction are intercepted with the reflux ratio of 1:1-10; C, after collecting the fraction on the tower top, the tower reactor liquid after step B is collected for condensing and layering, then the upper layer water phase is treated as waste water, and the lower layer oil phase is dissolved in ethanol to form heavy oil; D, the components are filtered to redistill in distillation tower to obtain the light oil and recover the ethanol.

Description

technical field [0001] The invention belongs to the field of separation and modification of cracked oil, and mainly relates to the separation and modification of biomass cracked oil. Background technique [0002] The primary energy sources dominated by petroleum and coal are increasingly depleted, while biomass energy uses renewable or recycled organic substances, including crops, trees and other plants and their residues, as raw materials to produce bio-based products, biofuels and Bioenergy production industry. Biomass pyrolysis oil is a liquid product obtained by direct pyrolysis and liquefaction of biomass. Compared with other energy utilization methods, biomass pyrolysis oil has high energy density and is easy to transport. Moreover, this kind of pyrolysis oil contains little sulfur and nitrogen, which can greatly reduce the content of SOx and NOx in the exhaust gas, and reduce the pollution to the atmosphere; on the other hand, because it comes from biomass, CO 2 The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00
Inventor 徐俊明蒋剑春孙云娟
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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