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Method for improving dark fermentation hydrogen production performance by using ferroferric oxide/reduced graphene oxide nano composite material

A nano-composite material and technology of ferroferric oxide, applied in iron oxide/iron hydroxide, chemical instruments and methods, fermentation, etc., can solve the problem of low hydrogen production and achieve the effect of sludge reduction treatment

Active Publication Date: 2022-04-29
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problem of low hydrogen production in the prior art of hydrogen production by dark fermentation, and to provide a method for improving the performance of hydrogen production by dark fermentation using iron ferric oxide / reduced graphene oxide nanocomposites

Method used

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  • Method for improving dark fermentation hydrogen production performance by using ferroferric oxide/reduced graphene oxide nano composite material
  • Method for improving dark fermentation hydrogen production performance by using ferroferric oxide/reduced graphene oxide nano composite material
  • Method for improving dark fermentation hydrogen production performance by using ferroferric oxide/reduced graphene oxide nano composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The preparation method of ferroferric oxide / reduced graphene oxide nanocomposite:

[0059] Step (1), according to the improved Hummers method to prepare GO with flake graphite as raw material.

[0060] a. Dissolve 5g flake graphite and 2.5g sodium nitrate in 120mL of H 2 SO 4 In, slowly add 15g of potassium permanganate and stir rapidly in ice-water bath for 2h.

[0061] b. Put the flask containing the mixed solution in an oil bath at 35°C for 2 hours, take out the flask and put it in an ice-water bath, and add 200 mL of deionized water.

[0062] c. Put the flask in an oil bath at 98° C. for 1.5 h. After the reaction, pour the mixture in the flask into a 1000 mL beaker, and add deionized water until the volume reaches 1000 mL.

[0063] d. Slowly add 20mL of 30wt% H 2 o 2 , the solution turned bright yellow, and sealed for 12h.

[0064] e. The supernatant was discarded, ultrasonically stripped for 1 h, washed with HCl (0.1 mol / L) and deionized water several times u...

Embodiment 2

[0076] Utilize iron ferric oxide / reduced graphene oxide nanocomposite material to improve the method for dark fermentation hydrogen production, the preparation of ferric iron tetroxide / reduced graphene oxide nanocomposite material is as described in example 1,

[0077] Specific steps are as follows:

[0078] (1) Collect the anaerobic sludge of the citric acid wastewater treatment plant (located in Weifang, Shandong), the water content of the anaerobic sludge of the citric acid wastewater treatment plant is about 80%. The anaerobic sludge screening and cultivation measures are as follows: add 1.0g / L glucose and carry out anaerobic cultivation at 37°C for 20 days. The ratio of the inoculum with active hydrogen-producing bacteria to the total fermentation volume is 3:10; the middle temperature is 37°C.

[0079] (2) The anaerobic sludge obtained in step (1) is heat-treated with the cultivated sludge, and the enriched sludge is preheated at 90° C. for 30 minutes, The activity of ...

Embodiment 3

[0085] The preparation of ferric oxide / reduced graphene oxide nanocomposite is as described in example 1.

[0086] Utilize iron ferric oxide / reduced graphene oxide nanocomposite material to improve the method for dark fermentation hydrogen production, concrete steps are as follows:

[0087] The anaerobic sludge of the citric acid wastewater treatment plant (located in Weifang, Shandong) was collected, and the water content of the anaerobic sludge of the citric acid wastewater treatment plant was about 80%. The anaerobic sludge screening and cultivation measures are as follows: add 1.0g / L glucose and carry out anaerobic cultivation at 37°C for 20 days. The ratio of the inoculum with active hydrogen-producing bacteria to the total fermentation volume is 3:10; the middle temperature is 37°C.

[0088] (2) The anaerobic sludge obtained in step (1) is heat-treated with the cultivated sludge, and the enriched sludge is preheated at 90° C. for 30 minutes, The activity of methanogens...

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Abstract

The invention provides a method for improving dark fermentation hydrogen production performance by using a ferroferric oxide / reduced graphene oxide nano composite material. The addition amount of the ferroferric oxide / reduced graphene oxide nano composite material in the anaerobic dark fermentation system is 100-400mg / L, the ferroferric oxide / reduced graphene oxide nano composite material is prepared from the following components in percentage by mass: 22.79%-27.57% of nano ferroferric oxide and 22.79%-27.57% of reduced graphene oxide. The size of the ferroferric oxide / reduced graphene oxide nano composite material is 80 to 120 nm. The nano ferroferric oxide is uniformly distributed on the surface of the gauze-shaped reduced graphene oxide. According to the structure, the agglomeration phenomenon of ferroferric oxide and reduced graphene oxide is well avoided, the materials can be better dispersed in a dark fermentation hydrogen production system, the interrelation among microorganisms is increased, more electronic channels are constructed, and the hydrogen production performance of hydrogen production microorganisms is improved.

Description

technical field [0001] The invention relates to the field of synthesis of nanocomposite materials and clean energy production, and relates to a method for improving the hydrogen production performance of dark fermentation, in particular to a method for improving the hydrogen production performance of dark fermentation by using iron ferric oxide / reduced graphene oxide nanocomposite material method. Background technique [0002] Hydrogen is a high-energy-density, clean, and efficient energy source that can achieve the required high combustion calorific value and "zero emission" of pollutants. Currently, about 96% of hydrogen sources come from fossil fuels (such as coal, petroleum, etc.). With the increasingly severe energy crisis and climate deterioration, people began to turn hydrogen production raw materials to renewable resources. [0003] The three main ways to produce hydrogen from renewable resources are: H 2 Dissociation of O molecules, thermochemical processes and m...

Claims

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Application Information

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IPC IPC(8): C01G49/08C01B32/192C12P3/00
CPCC01G49/08C01B32/192C12P3/00C01P2002/72C01P2004/80C01P2006/42C01P2004/03
Inventor 薛嵘孙艳马云倩臧立华郭艳
Owner QILU UNIV OF TECH
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