Method for raising quality of biomass pyrolysis oil by reactive extraction

A technology of biomass pyrolysis oil and biomass pyrolysis oil, which is only applied in the direction of multi-stage serial refining process treatment, etc., can solve the problems of complex process, unstable physical and chemical properties of biomass pyrolysis oil, and low calorific value, and achieve Simple equipment, improved storage stability, and high calorific value

Inactive Publication Date: 2009-09-16
JIANGSU QIANGLIN BIO ENERGY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] In order to solve the shortcomings of unstable physical and chemical properties of biomass pyrolysis oil, low calorific value, and complicated process in the prior art, the present invention provi...

Method used

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  • Method for raising quality of biomass pyrolysis oil by reactive extraction
  • Method for raising quality of biomass pyrolysis oil by reactive extraction
  • Method for raising quality of biomass pyrolysis oil by reactive extraction

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Add 100g of biomass cracking oil, 40g of n-butanol, and 2g of concentrated sulfuric acid with a mass fraction of 98% into a four-necked flask equipped with mechanical stirring, a condenser, and a thermometer. At 80° C., 20 g of an aqueous hydrogen peroxide solution having a mass concentration of 30% was added dropwise. Then react at 80°C for 5h. Static phase separation after the reaction, the lower layer is a clear and transparent aqueous solution; the black oil phase of the upper layer is separated, and distilled under reduced pressure at 80°C and 10Kpa, and 48g of black viscous liquid is obtained after recovering n-butanol in the oil phase, according to m 产物 :m 乙醇 = Dilute and dissolve with methanol at a ratio of 4:1 to obtain a modified bio-oil with a pH of 5.02 and a density of 1.03g / cm 3 , water content 0.83%wt, calorific value 28.3kJ / g, viscosity 36.7mm 2 / s (30°C).

Embodiment 2

[0027]Add 100g of biomass cracking oil, 100g of n-butanol, and 10g of concentrated sulfuric acid into a four-necked flask equipped with mechanical stirring, a condenser, and a thermometer. At 80° C., 60 g of an aqueous hydrogen peroxide solution having a mass concentration of 30% was added dropwise. Then react at 80°C for 8h. Static phase separation after the reaction, the lower layer is a clear and transparent aqueous solution; the black oil phase of the upper layer is separated, and distilled under reduced pressure at 80 ° C and 10 Kpa, and 46 g of black viscous liquid is obtained after recovering n-butanol in the oil phase, according to m 产物 :m 乙醇 = Dilute and dissolve with methanol at a ratio of 4:1 to obtain a modified bio-oil with a pH of 4.26 and a density of 1.04g / cm 3 , water content 1.27%wt, calorific value 27.6kJ / g, viscosity 35.4mm 2 / s (30°C).

Embodiment 3

[0029] Add 100g of biomass cracking oil, 60g of n-butanol, and 6g of concentrated sulfuric acid into a four-necked flask equipped with mechanical stirring, a condenser, and a thermometer. At 80° C., 40 g of an aqueous hydrogen peroxide solution having a mass concentration of 30% was added dropwise. Then react at 80°C for 6h. Static phase separation after the reaction, the lower layer is a clear and transparent aqueous solution; separate the black oil phase of the upper layer, and distill under reduced pressure at 80°C and 10Kpa to recover n-butanol in the oil phase to obtain 47g of black viscous liquid, according to m 产物 :m 乙醇 = Dilute and dissolve with methanol at a ratio of 4:1 to obtain a modified bio-oil with a pH of 4.66 and a density of 1.03g / cm 3 , water content 0.96%wt, calorific value 27.9kJ / g, viscosity 36.3mm 2 / s (30°C).

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Abstract

The invention discloses a method for raising quality of biomass pyrolysis oil by reactive extraction. By selecting reactive extracting agent, two unit operations of reaction and extraction are carried out simultaneously, and the method comprises: a first step, according to a proportion of the biomass pyrolysis oil to low-carbon alcohol to a catalyst by mass being 100:40-100:2-10, adding the biomass pyrolysis oil, the low-carbon alcohol and the catalyst into a reaction kettle, dripping hydrogen peroxide water solution into the reaction kettle at a temperature of 80 DEG C according to a proportion of the biomass pyrolysis oil to oxidant by mass being 100:20-60, and then heating the mixture for reacting for 5 to 8 hours at a temperature of between 80 and 100 DEG C; and a second step, after total reflux reaction is ended, cooling, condensing and layering the mixture, and obtaining clear and transparent water solution on the lower layer; and separating a black oil phase on the upper layer, distilling and reclaiming the unreacted low-carbon alcohol in the oil phase at a temperature of 80 DEG C under 10KPa, obtaining the black sticky liquid which is not distilled, namely a product, and diluting and dissolving the product by methanol according to a proportion of the product to the methanol by mass being 4:1 to obtain the modified biological oil, wherein the pH is 4 to 6, the density is 1.0 to 1.1 g/cm<3>, the water content is 0.5 to 2.0 percent, the thermal value is 25.0 to 30.0 kilojoules per gram, and the viscosity is 35 to 40 mm<2>/s at a temperature of 30 DEG C.

Description

technical field [0001] The invention belongs to the technical field of biomass energy conversion, and mainly relates to a method for preparing fuel oil by upgrading and modifying biomass pyrolysis liquefied 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 ...

Claims

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Application Information

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IPC IPC(8): C10G53/14
Inventor 蒋剑春徐俊明陈洁孙云娟李书龙
Owner JIANGSU QIANGLIN BIO ENERGY
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