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A method for pretreating lignocellulosic biomass with carbonate 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 fermentable sugar yield, and the effect of improving the retention rate

Active Publication Date: 2019-07-19
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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  • A method for pretreating lignocellulosic biomass with carbonate hydrogen peroxide
  • A method for pretreating lignocellulosic biomass with carbonate hydrogen peroxide
  • A method for pretreating lignocellulosic biomass with carbonate hydrogen peroxide

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1) Corn stalk crushed

[0030] Use a grass cutter to chop the air-dried corn stalks to 0.05-1 cm and collect them in a ziplock bag for later use.

[0031] 2) Corn stover pretreatment

[0032] Take appropriate amount of chopped corn stalk raw materials and load them into a batch pretreatment reactor (Shaanxi Xianyang Test Laboratory Equipment Co., Ltd., PL1-00), and add water (tap water) and chemicals to the reactor, and then wait for 30 minutes The internal temperature is raised to 120°C, and the temperature is maintained for 60 minutes after the temperature is raised, so that the raw materials can be pretreated.

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

[0034] The black liquor of the pret...

Embodiment 2

[0045] 1) Corn stalk crushed

[0046] Use a grass cutter to chop the air-dried corn stalks to 0.5-2 cm and collect them in a ziplock bag for later use.

[0047] 2) Corn stover pretreatment

[0048] Load appropriate amount of chopped corn stalks into a batch pretreatment reactor (Shaanxi Xianyang Test Laboratory Equipment Co., Ltd., PL1-00) and add water (tap water) and chemicals to the reactor, and then heat up within 30 minutes The temperature is raised to 120°C, and the temperature is kept for 70 minutes, so that the raw materials can be pretreated.

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

[0050] The black liquor of the pretreated material is extruded, the slurry is washed with tap water to a neu...

Embodiment 3

[0061] 1) Corn stalk crushed

[0062] Use a grass cutter to chop the air-dried corn stalks to 1-3 cm, and collect them in a ziplock bag for later use.

[0063] 2) Corn stover pretreatment

[0064] Take an appropriate amount of chopped corn stalks and load it into a batch pretreatment reactor (Shaanxi Xianyang Test Laboratory Equipment Co., Ltd., PL1-00), and add water (tap water) and chemicals to the reactor, and then within 30 minutes The temperature is raised to 110°C, and the temperature is kept for 90 minutes after the temperature is raised, so that the raw materials can be pretreated.

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

[0066] The black liquor of the pretreated material is extruded, the slur...

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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 efficient conversion and utilization of biomass, and specifically is 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 global demand for energy is increasing, which aggravates energy and environmental problems. The development and utilization of renewable energy is increasingly valued, and the development and utilization of biomass energy is one of the best ways to solve energy and environmental problems, and the research of biomass energy has long attracted the attention of researchers from all over the world. Biomass is one of the most abundant renewable energy sources on the planet, with an annual global output of approximately 1.1×10 11 Ton. Among them, lignocellulosic biomass has the most abundant reserves, has the advantages of wide sources (for example, corn stover, wh...

Claims

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Application Information

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Patent Type & Authority Patents(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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