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A method for pretreatment and separation of lignocellulosic biomass

A lignocellulosic and pretreatment technology, applied in the direction of water/steam pretreatment, acid acid anhydride pulping, etc., can solve the problems of insufficient separation and utilization of products, high cost of drug recovery, equipment corrosion, etc., and achieve improvement Effects of enzymatic hydrolysis efficiency, reduction in chemical consumption and processing time, reduction in processing cost

Active Publication Date: 2018-07-27
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

[0007] Therefore, in view of the above, the existing pretreatment methods mainly have problems such as high energy consumption, high cost of drug recovery, equipment corrosion, and insufficient separation and utilization of products.

Method used

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  • A method for pretreatment and separation of lignocellulosic biomass
  • A method for pretreatment and separation of lignocellulosic biomass
  • A method for pretreatment and separation of lignocellulosic biomass

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1) Crushing of wheat straw

[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) Hydrothermal pretreatment of wheat straw

[0032] Take an appropriate amount of chopped wheat straw and load it into a batch pretreatment reactor (Shaanxi Xianyang Taisite Experimental Equipment Co., Ltd., PL1-00), and add tap water to the reactor, and then raise the temperature to 170 ° C within 30 minutes. After heating up, keep it warm for 80 minutes, and the liquid-solid ratio is 6:1, so that the raw material can be self-hydrolyzed to extract hemicellulose. Squeeze out the hydrolyzate of the above-mentioned treated materials, wash it with tap water until neutral, then collect it into a ziplock bag and weigh it for later use. After the hydrolyzate is separated and purified, xylooligosaccharide products can be obtained.

[0033] 3) Sulfonation pretreatment of wheat straw

[0034] Get the cleaned material in 2...

Embodiment 2

[0042] 1) Crushing of wheat straw

[0043] Cut the air-dried corn stalks to 0.05-1cm with a lawn cutter, and collect them in ziplock bags for later use.

[0044] 2) Hydrothermal pretreatment of wheat straw

[0045] Take an appropriate amount of chopped wheat straw raw materials and load them into a batch pretreatment reactor (Shaanxi Xianyang Taisite Experimental Equipment Co., Ltd., PL1-00), and add tap water to the reactor, and then raise the temperature to 175 ° C within 30 min. After heating up, keep it warm for 90 minutes, and the liquid-solid ratio is 8:1, so that the raw material can be hydrothermally pretreated and hemicellulose can be extracted. Squeeze out the hydrolyzate of the above-mentioned treated materials, wash it with tap water until neutral, then collect it into a ziplock bag and weigh it for later use. The hydrolyzate can produce xylooligosaccharide products after separation and purification.

[0046] 3) Sulfonation pretreatment of wheat straw

[0047] ...

Embodiment 3

[0055] 1) Crushing of wheat straw

[0056] Chop the air-dried wheat straw to 0.5-1cm with a grass cutter, and collect it in a ziplock bag for later use.

[0057] 3) Hydrothermal pretreatment of wheat straw

[0058] Take an appropriate amount of crushed wheat straw and load it into a batch pretreatment reactor (Shaanxi Xianyang Tester Experimental Equipment Co., Ltd., PL1-00), and add tap water to the reactor, then raise the temperature to 175 ° C within 30 minutes, and then After 20 minutes of heat preservation, the liquid-solid ratio is 8:1, so that the raw material can be hydrothermally pretreated and hemicellulose can be extracted. Squeeze out the hydrolyzate of the above-mentioned treated materials, wash it with tap water until neutral, then collect it into a ziplock bag and weigh it for later use. The hydrolyzate can produce xylooligosaccharide products after separation and purification.

[0059] 4) Sulfonation pretreatment of wheat straw

[0060] Get the cleaned mate...

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Abstract

The invention provides a hydrothermal and sulfonating combined method for pretreatment and separation of lignocellulose biomass. The method comprises the steps of 1, mechanically crushing the lignocellulose biomass into a proper particle size, and then conducting preimpregnation; 2, mixing solid obtained from the step 1 with water or vapor for hydrothermal pretreatment; 3, mixing a hydrothermally pretreated and cleaned solid material obtained from the step 2 with sulfonating pretreatment liquor medicine for sulfonating pretreatment. According to the method, hydrothermal pretreatment and sulfonating pretreatment are combined, hemicelluloses can be effectively removed, lignin can be effectively removed, and then the content of substrate cellulose is increased remarkably and enzyme hydrolysis efficiency is improved greatly.

Description

technical field [0001] The invention belongs to the field of high-efficiency transformation and utilization of biomass, and specifically relates to a method for separating lignocellulosic biomass through combined hydrothermal and sulfonation pretreatment. Background technique [0002] With the development of society and the improvement of human living standards, the demand for global energy is increasing day by day, which aggravates energy and environmental problems. The development and utilization of renewable energy has become an inevitable trend and research hotspot. Therefore, as a renewable energy source, the development and utilization of biomass energy has very important practical significance, and has been valued by researchers all over the world. Lignocellulosic biomass is considered to be the most promising raw material for the production of biofuels due to its abundant reserves, wide sources, low cost and easy availability. However, the natural complex polymer ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C1/02D21C3/06
CPCD21C1/02D21C3/06
Inventor 李滨龚文博牟新东刘超张跃冬于光
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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