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Method for preprocessing lignocellulose biomasses by virtue of carbonate and hydrogen peroxide

A technology of carbonate hydrogen peroxide and lignocellulose, which is applied in the field of carbonate hydrogen peroxide pretreatment of lignocellulosic biomass, which can solve the problems of low treatment temperature and long treatment time, and reduce catalytic decomposition , high yield of fermentable sugar, and the effect of reducing energy consumption

Active Publication Date: 2015-12-16
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the alkaline hydrogen peroxide pretreatment method has been studied to a certain extent, the alkaline hydrogen peroxide pretreatment methods that appear in the literature and patents basically use NaOH as the alkali agent, and the treatment temperature is low and the treatment time is relatively low. longer
There is no report on the pretreatment process of carbonate hydroperoxide with carbonate as alkaline reagent

Method used

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  • Method for preprocessing lignocellulose biomasses by virtue of carbonate and hydrogen peroxide
  • Method for preprocessing lignocellulose biomasses by virtue of carbonate and hydrogen peroxide
  • Method for preprocessing lignocellulose biomasses by virtue of carbonate and hydrogen peroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Corn stalk crushing

[0030] Cut the air-dried corn stalks to 0.05-1cm with a lawn cutter, and collect them in ziplock bags for later use.

[0031] 2) Pretreatment of corn stalks

[0032] Get an appropriate amount of chopped corn stalk raw material and load it into a batch pretreatment reactor (Shaanxi Xianyang Taisite Experimental Equipment Co., Ltd., PL1-00), and add water (tap water) and chemicals to the reactor, and then in 30min The internal temperature is raised to 120°C, and the temperature is kept for 60 minutes after the temperature is raised, so that the raw materials can be pretreated.

[0033] Among them, the liquid-solid ratio in the reactor is 8:1 (mass ratio), the chemicals are sodium carbonate and hydrogen peroxide, the addition of sodium carbonate is 30% (relative to the quality of absolute dry corn stalks), the amount of hydrogen peroxide It is 15% (relative to the quality of absolute dry corn stalks).

[0034] Squeeze out the black liquor of the...

Embodiment 2

[0045] 1) Corn stalk crushing

[0046] Cut the air-dried corn stalks to 0.5-2cm with a lawn cutter, and collect them in ziplock bags for later use.

[0047] 2) Pretreatment of corn stalks

[0048] Take an appropriate amount of chopped corn stalks and load them into a batch pretreatment reactor (Shaanxi Xianyang Tester Experimental Equipment Co., Ltd., PL1-00) and add water (tap water) and chemicals to the reactor, and then heat up within 30 minutes To 120°C, keep warm for 70 minutes after heating up, so that the raw materials can be pretreated.

[0049] Among them, the liquid-solid ratio in the reactor is 7:1 (mass ratio), the chemicals are sodium carbonate and hydrogen peroxide, the addition of sodium carbonate is 40% (relative to the absolute dry corn stalk quality), the amount of hydrogen peroxide It is 15% (relative to the quality of absolute dry corn stalks).

[0050]Squeeze out the black liquor of the above-mentioned pretreated material, wash the slurry with tap water...

Embodiment 3

[0061] 1) Corn stalk crushing

[0062] Cut the air-dried corn stalks to 1-3cm with a lawn cutter, and collect them in ziplock bags for later use.

[0063] 2) Pretreatment of corn stalks

[0064] Take an appropriate amount of chopped corn stalks and load them into a batch pretreatment reactor (Shaanxi Xianyang Tester Experimental Equipment Co., Ltd., PL1-00), and add water (tap water) and chemicals to the reactor, and then within 30min Raise the temperature to 110°C, and keep it warm for 90 minutes after the temperature rise, so that the raw materials can be pretreated.

[0065] Among them, the liquid-solid ratio in the reactor is 8:1 (mass ratio), the chemicals are sodium carbonate and hydrogen peroxide, the addition of sodium carbonate is 50% (relative to the quality of dry corn stalks), and the amount of hydrogen peroxide It is 10% (relative to the quality of absolute dry corn stalks).

[0066] Squeeze out the black liquor of the above-mentioned pretreated material, wash ...

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Abstract

The invention belongs to the fields of efficient conversion and utilization of biomasses and particularly relates to a method for preprocessing lignocellulose biomasses by virtue of carbonate and hydrogen peroxide. According to the method, the lignocellulose biomasses are preprocessed at a relatively low temperature by virtue of a combined solution of carbonate and hydrogen peroxide; an adopted alkali reagent is carbonate and is easier to recycle as compared with common hydroxide (such as sodium hydroxide), furthermore, hydrogen peroxide is an environmental-friendly oxidant and is combined with carbonate for use, so that the removal rate of lignin can be increased, the structure of lignin can be changed, more celluloses can be exposed, and the relatively high yield of fermentable sugars is achieved.

Description

technical field [0001] The invention belongs to the field of high-efficiency conversion and utilization of biomass, and specifically relates to a method for pretreating lignocellulosic biomass with carbonate hydrogen peroxide. Background technique [0002] With the development of society and the improvement of human living standards, the demand for global energy is increasing, which aggravates energy problems and environmental problems. The development and utilization of renewable energy has been paid more and more attention, and the development and utilization of biomass energy is one of the best ways to solve energy and environmental problems, and the research on biomass energy has long been concerned by researchers from various countries. Biomass is one of the most abundant renewable energy sources on earth, with an annual global production of about 1.1×10 11 Ton. Among them, lignocellulosic biomass has the most abundant reserves, and has the advantages of a wide range ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P19/14C12P19/02
Inventor 龚文博李滨刘超牟新东杜海顺
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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