Method for pyrolyzing cellulose in presence of deep eutectic solvent

A technology of low eutectic solvent and cellulose, which is used in biofuels, fermentation and other directions, can solve the problems of high reactor performance requirements, inability to recover acid liquid, and increase environmental load, etc. effect

Inactive Publication Date: 2014-12-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on cellulose degradation is mostly focused on the acid degradation method, but the traditional acid degradation method has high requirements on the performance of the reactor and cannot recover the acid solution, and the treatment of the acid solution increases the environmental load; the alkali degradation method also has the acid degradation method. Defects, and require high temperature treatment, while the oxidation method requires the use of strengthening agents, which may lead to incomplete degradation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix the dried potassium carbonate and glycerol at a molar ratio of 1:5, heat and stir at 85°C for 1 hour until all solids are completely dissolved to form a uniform and transparent liquid; Cut pretreated or physical-chemical combined pretreated straws whose size has reached 0.5-3cm×0.2-1cm×0.2-1cm, heat at 150°C for 5 hours to make it pyrolyzed, and extract the generated glucose after the reaction -Glycerol solution, sugar-alcohol solution is further used for fermentation to produce ethanol.

Embodiment 2

[0020] Mix the dried potassium carbonate and ethylene glycol at a molar ratio of 1:8, heat and stir at 90°C for 1 hour, until all the solids are completely dissolved to form a uniform and transparent liquid; Cut pretreated or physical-chemical combined pretreated reclaimed cellulose fibers whose size has reached 0.5-3cm×0.2-1cm×0.2-1cm, heat at 180°C for 1.5 hours to make it pyrolyzed, after the reaction, extract and produce The glucose-ethylene glycol solution, the sugar-alcohol solution is further used for fermentation to prepare ethanol.

Embodiment 3

[0022] Mix the dried potassium carbonate and glycerol at a molar ratio of 1:6, heat and stir at 100°C for 1 hour until all solids are completely dissolved to form a uniform and transparent liquid; Cut the pretreated corn cobs whose size has reached 0.5-3cm×0.2-1cm×0.2-1cm, heat at 170°C for 2 hours to make it pyrolyzed, and extract the generated glucose after the reaction -Glycerol solution, sugar-alcohol solution is further used for fermentation to produce ethanol.

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PUM

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Abstract

The invention relates to a method for pyrolyzing cellulose in the presence of a deep eutectic solvent. The method comprises the following steps of (1), adding alkali metal carbonate in a high-polarity polybasic alcohol according to a molar ratio of (5:1)-(10:1), heating and stirring for 0.5-2 hours at 80-100 DEG C to obtain a uniform and transparent liquid; and (2) adding a cellulose raw material subjected to mechanical shearing pretreatment or combined physical-chemical pretreatment into the liquid obtained in the step (1), heating for 1-6 hours at 130-180 DEG C, pyrolyzing and reacting to obtain a glucose-polybasic alcohol solution, extracting the obtained glucose-polybasic alcohol solution and further fermenting the glucose-polybasic alcohol solution to prepare ethanol. The method disclosed by the invention has the advantages of simple process and low cost and is particularly suitable for industrially preparing ethanol as a fuel by decomposing a cellulosic biomass and is also suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of degrading cellulose, in particular to a method for pyrolyzing cellulose raw materials with a deep eutectic solvent. Background technique [0002] With the increasing shortage of non-renewable resources such as petroleum and coal and the increasing attention and attention to environmental pollution in various countries, cellulose will surely become one of the most important industrial raw materials in the future. It will be a good development direction to produce fuel and prepare chemical products by degrading cellulose. Cellulose degradation generally includes acid degradation, alkali degradation, and oxidation. Through degradation, glycosidic bonds are broken to generate oligosaccharides or monosaccharides, and further fuel ethanol, methylglyoxal, etc. can be obtained. At present, the research on cellulose degradation is mostly focused on the acid degradation method, but the traditional acid degradation method ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/10
CPCY02E50/10
Inventor 邢彦军刘玉婷张京彬张欢欢
Owner DONGHUA UNIV
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