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Method for improving quality of bio-oil

A bio-oil and quality technology, applied in the field of bio-oil, can solve the problem of consuming large alcohols and achieve the effect of improving stability

Inactive Publication Date: 2012-07-04
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned esterification based on acid alcohols needs to consume a large amount of alcohols

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 100 g of bio-oil without any catalytic upgrading treatment was subjected to atmospheric distillation, the fraction below 120°C was discarded, and the fraction at 120-250°C was collected. The resulting fraction was initially golden yellow, turned red after standing for 3 days, and turned black and turbid after two weeks.

Embodiment 2

[0012] Add 0.5mol of acetic anhydride to 100g of bio-oil, KOH (or NaOH, Ba(OH) 2 ) / γ-Al 2 o 3 (containing 25% alkali) 10g, reflux at 60-80°C for 0.5h. The catalytically upgraded bio-oil is distilled at atmospheric pressure, the fraction below 120°C is discarded, and the fraction at 120-250°C is collected to obtain refined bio-oil. The resulting refined bio-oil has a greatly reduced viscosity and is clear and golden yellow. Stored in light, the color deepens after one week, and then stabilizes to dark red, and remains clear within 6 months.

Embodiment 3

[0014] Add 0.5mol of acetic anhydride to 100g of bio-oil, KOH (or NaOH, Ba(OH) 2 ) / γ-Al 2 o 3 (containing 25% alkali) 10g, reflux at 60-80°C for 2h. The catalytically upgraded bio-oil is distilled at atmospheric pressure, the fraction below 120°C is discarded, and the fraction at 120-250°C is collected to obtain refined bio-oil. The resulting refined bio-oil has a greatly reduced viscosity and is clear and golden yellow. Stored in light, the color deepens slightly after being placed for a week, then stabilizes to red, and remains clear within 6 months.

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PUM

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Abstract

The invention relates to a method for improving quality of bio-oil, relating to bio-oil. Bio-oil, acetic anhydride and solid alkali are mixed and heated for backflow, preparing catalytically upgraded bio-oil; and distilling the catalytically upgraded bio-oil under the atmospheric pressure, removing distillate under 120 DEG C, and collecting distillate of 120-250 DEG C, thereby obtaining refined bio-oil. No alcohol is needed, only a small amount of glycoside carboxylate needs to be added, and the quality of the bio-oil can be improved via catalysis. The stability of the refined bio-oil can be improved greatly.

Description

technical field [0001] The invention relates to a biological oil, in particular to a method for improving the quality of the biological oil. Background technique [0002] The esterification method is one of the effective methods to improve the quality of bio-oil. The current esterification method for bio-oil quality improvement is to add alcohols (such as ethanol) to catalyze the carboxylation in bio-oil in the presence of a catalyst. Esterification of acids and alcohols eliminates the acidity of bio-oils and avoids corrosion problems caused to equipment during the use of bio-oils. Xu Ying et al. ([1] Xu Ying, Chang Jie, et al. Catalytic esterification modification of bio-oil on solid base catalyst. Petrochemical Industry, 2006, 35(7): 615-618) Esterification of bio-oil with solid base Quality improvement; Guo Chunxia et al. ([2] Guo Chunxia, ​​Jiang Xiaoyuan, et al. Research on esterification of bio-oil catalyzed by solid acid catalyst under microwave conditions. Journal o...

Claims

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Application Information

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IPC IPC(8): C11C3/00C10L1/02
Inventor 龙敏南甘礼惠任德安林聪玉
Owner XIAMEN UNIV
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