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Method for preparing light phenol organic mixture through catalytic pyrolysis of biomass

An organic mixture, catalytic pyrolysis technology, applied in the preparation of organic compounds, chemical instruments and methods, organic chemistry, etc., can solve the problems of increasing the production cost of phenolic substances, low content, low yield, etc.

Active Publication Date: 2011-05-25
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the bio-oil obtained by conventional pyrolysis of biomass, not only the yield of phenolic substances is very low, but also mixed with a large amount of pyrolysis products of cellulose, the content is also very low
Although a variety of solvent extraction methods have been used to separate and extract phenolic substances from bio-oil, this greatly increases the cost of preparation of phenolic substances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take poplar as raw material, crush it to an average particle size of 5 mm, soak it in 20% aqueous solution of potassium phosphate for 3 hours and filter it, then let the soaked raw material dry naturally at room temperature overnight, and then dry it at 105°C for 3 hours to remove free Moisture, as the experimental raw material, the load of tripotassium phosphate is 8.5%.

[0014] Using a pyrolysis reaction device to pyrolyze the above-mentioned raw materials at 320° C. under a nitrogen atmosphere for 10 seconds, the yield of the liquid product obtained is 43%, wherein the yield of the water phase part is 31%, and the yield of the oil phase part is 12%; By analyzing the liquid product, it was determined that the yield of light phenolic organic mixture was 10.4%.

Embodiment 2

[0016] Take poplar as raw material, crush it to an average particle size of 4 mm, soak it in 15% dipotassium hydrogen phosphate aqueous solution for 5 hours and filter it, then dry the soaked raw material naturally at room temperature overnight, and then dry it at 105°C for 3 hours to remove free Moisture, as the experimental raw material, the load of dipotassium hydrogen phosphate is 7.8%.

[0017] Using a pyrolysis reaction device to pyrolyze the above-mentioned raw materials at 350° C. under an inert gas atmosphere (using the combustible gas generated by pyrolysis as the protective gas) for 5 seconds, the yield of the liquid product obtained is 48%, and the yield of the water phase part is 30%, and the yield of the oil phase part is 18%; by analyzing the liquid product, it is determined that the yield of the light phenolic organic mixture is 14.1%.

Embodiment 3

[0019] Use rice husk as raw material, crush it to an average particle size of 2 mm, soak it in 18% disodium hydrogen phosphate aqueous solution for 7 hours, filter it, then dry the soaked raw material naturally at room temperature overnight, and then dry it at 105°C for 3 hours to remove free Moisture, as the experimental raw material, the loading capacity of dipotassium hydrogen phosphate is 10.6%.

[0020] Using a pyrolysis reaction device to pyrolyze the above-mentioned raw materials at 360° C. for 5 seconds under a nitrogen atmosphere, the yield of the liquid product obtained is 40%, wherein the yield of the water phase part is 29%, and the yield of the oil phase part is 11%; By analyzing the liquid product, it was determined that the yield of light phenolic organic mixture was 8.8%.

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Abstract

The invention discloses a method for preparing a light phenol organic mixture through catalytic pyrolysis of biomass, and belongs to the field of utilization of biomass energy. The method comprises the following steps of: loading phosphate serving as a catalyst to a biomass raw material in an impregnation mode, performing pyrolytic reaction at the temperature of between 280 and 500 DEG C under the oxygen-free condition, and condensing pyrolysis gas to obtain a liquid product rich in the light phenol organic mixture. In the method, the phosphate serving as the catalyst is loaded to the biomassraw material in the impregnation mode, and the pretreated biomass raw material is pyrolyzed, so that the defects of low yield, low content, high separation and extraction cost and the like of phenol substances in biological oil obtained by the conventional biomass pyrolysis liquefying technology are overcome. The method is suitable for large-scale industrial production and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of utilization of biomass energy, and relates to a method for preparing light phenolic organic mixtures by catalyzing and pyrolyzing biomass. Background technique [0002] All living organisms that can grow are collectively referred to as biomass, including plants, animals and microorganisms. At present, the biomass resources available for development and utilization are mainly lignocellulosic biomass of various agricultural and forestry wastes. Lignocellulosic biomass generally consists of three main components: cellulose, hemicellulose and lignin, as well as a small amount of ash and extracts. Biomass pyrolysis and liquefaction technology is a technology developed only in the 1980s. Under the condition of medium temperature and anoxic, biomass is rapidly decomposed by heat to form liquid bio-oil, a certain amount of solid coke and combustible gas. Three product processes. A variety of high value-added chemicals c...

Claims

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Application Information

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IPC IPC(8): C07C37/52
CPCY02P20/52
Inventor 陆强董长青张俊姣田慧云张志飞杨勇平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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