Method for preparing hydrogen and methane by adopting cassava dregs preprocessed by methyl morpholine oxide ionic liquid

A technology for oxidizing methyl morpholine and ionic liquid, which is applied in the chemical industry, climate sustainability, waste fuel, etc., can solve the problems of biomass fermentation that is not involved in hydrogen production, improve energy conversion efficiency, and improve enzymatic hydrolysis. Efficiency, the effect of improving the yield of hydrogen alkane gas

Inactive Publication Date: 2017-03-22
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of ionic liquids to oxidize methylmorpholine for pretreatment of cassava residues has not been reported in the literature, and it has not been involved in the production of hydrogen from biomass fermentation.

Method used

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  • Method for preparing hydrogen and methane by adopting cassava dregs preprocessed by methyl morpholine oxide ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Grind the cassava slag to a particle size of ≤0.02mm, place it in an oven and dry it at 6°C for 24 hours to obtain the pretreated raw material; mix 5g of the pretreated raw material with 50g of ionic liquid with a mass concentration of 85%, and put it into a sealed 50ml round bottom The flask was pretreated in an oil bath magnetic stirrer at 110°C for 2h. Then add 20ml of distilled water, continue to stir for 10min, then centrifuge at 6000r / min for 10min, collect the supernatant and recover the ionic liquid. The precipitate was washed 3 times with deionized water, placed in an oven at 60°C, and dried to constant weight, and used as raw material for enzymatic hydrolysis;

[0025] The raw material for enzymatic hydrolysis was placed in a 250ml Erlenmeyer flask, 100ml of deionized water was added, the pH of the solution was adjusted to 4.5 with NaOH with a mass concentration of 6mol / L, and cellulase was added in an amount of 5wt%. Then seal the Erlenmeyer flask, place it ...

Embodiment 2

[0030] Grind the cassava residue to a particle size of ≤0.02mm, place it in an oven and dry it at 6°C for 24 hours to obtain the pretreated raw material; mix the pretreated raw material (5g) with an ionic liquid (50g) with a mass concentration of 87% in a mass ratio of 1: 10 mixed, put into a sealed 50ml round bottom flask, and pretreated in an oil bath magnetic stirrer at 110°C for 2.5h. Then add 20ml of distilled water, continue to stir for 10min, then centrifuge at 6000r / min for 10min, collect the supernatant and recover the ionic liquid. The precipitate was washed 3 times with deionized water, placed in an oven at 60°C, and dried to constant weight, and used as raw material for enzymatic hydrolysis;

[0031] The raw material for enzymatic hydrolysis was placed in a 250ml Erlenmeyer flask, 100ml of deionized water was added, the pH of the solution was adjusted to 4.5 with NaOH with a mass concentration of 6mol / L, and cellulase was added in an amount of 5wt%. Then seal the ...

Embodiment 3

[0036] Grind the cassava residue to a particle size of ≤0.02mm, place it in an oven and dry it at 6°C for 24 hours to obtain the pretreated raw material; mix the pretreated raw material (5g) and the ionic liquid (50g) with a mass concentration of 90% at a mass ratio of 1: 10 mixed, put into a sealed 50ml round-bottomed flask, and pretreated in an oil bath magnetic stirrer at 110°C for 3h. Then add 20ml of distilled water, continue to stir for 10min, then centrifuge at 6000r / min for 10min, collect the supernatant and recover the ionic liquid. The precipitate was washed 3 times with deionized water, placed in an oven at 60°C, and dried to constant weight, and used as raw material for enzymatic hydrolysis;

[0037] The raw material for enzymatic hydrolysis was placed in a 250ml Erlenmeyer flask, 100ml of deionized water was added, the pH of the solution was adjusted to 4.5 with NaOH with a mass concentration of 6mol / L, and cellulase was added in an amount of 5wt%. Then seal the ...

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Abstract

The invention relates to the biomass energy utilization technology, aiming at providing a method for preparing hydrogen and methane by adopting cassava dregs preprocessed by methyl morpholine oxide ionic liquid. The method comprises the following steps: grinding cassava dregs, and drying the grinded cassava dregs, thus obtaining a preprocessed material; mixing the preprocessed material with the methyl morpholine oxide ionic liquid, and carrying out pretreatment at 110 DEG C; adding with distilled water, and carrying out stirring, thus obtaining the sediment which serves as the raw material for enzyme hydrolysis; further, adding with deionized water and cellulase; carrying out heating under the sealed state, thus obtaining enzymatic hydrolysate; mixing the enzymatic hydrolysate with deionized water, adding with yeast extract, inoculating dark-fermentation hydrogenogens, and introducing high-purity nitrogen till the dark-fermentation hydrogen producing process is finished; and carrying out sterilization on tail liquid, inoculating activated methanogens, introducing high-purity nitrogen, and carrying out fermentation, thus obtaining methane. According to the method provided by the invention, the yields of hydrogen and methane are obviously improved by adopting the cassava dregs preprocessed by the methyl morpholine oxide ionic liquid; compared with the method for preparing methane by adopting the cassava dregs preprocessed by methyl morpholine oxide ionic liquid, the method for co-preparing hydrogen and methane by adopting the cassava dregs preprocessed by the methyl morpholine oxide ionic liquid provided by the invention has the advantages that the energy exchange efficiency is improved.

Description

technical field [0001] The invention relates to biomass energy utilization technology, in particular to a method for producing hydroalkane gas from cassava residue pretreated by oxidation of methylmorpholine ionic liquid. Background technique [0002] With the increasing demand for energy, the gradual reduction of fossil fuels and the gradual improvement of environmental protection requirements, the search for renewable energy is becoming more and more important. As a clean and efficient renewable energy, hydrogen energy has attracted people's attention. Using lignocellulose as raw material to produce hydrogen through bacterial fermentation has a good application prospect. There are a large number of starch factories in Guangxi, Guangdong, Hainan and other provinces. When cassava is used to process and produce starch, a lot of cassava dregs will be produced. If used improperly, these wastes can have adverse effects on the environment. Cassava residue is a kind of natural ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P3/00C12P5/02C12P19/14
CPCC12P3/00C12P5/023C12P19/14C12P2201/00C12P2203/00Y02E50/30Y02P20/10
Inventor 程军岑可法周俊虎刘建忠王智化黄镇宇周志军杨卫娟张彦威耿虎张利
Owner ZHEJIANG UNIV
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