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Manganese-doped magnetic carbon and preparation and application of magnetic carbon in dark fermentation hydrogen production

A technology of manganese doping and magnetic carbon, applied in fermentation, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as high energy consumption, limited application, pollution, etc., and achieve the effect of increasing hydrogen production

Active Publication Date: 2019-04-16
QILU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Patent application CN104726501A (application number 201510145589.9) uses calcium carbonate as an additive to improve the fermentation effect of bagasse. Although a good gas production effect is achieved, calcium carbonate eventually precipitates in the system, resulting in an increase in the amount of sludge, and sludge reduction cannot be achieved processing
[0008] However, the additives for promoting fermentative hydrogen production reported in the above literature have disadvantages such as complex production process, high energy consumption or pollution, which limit their application in the field of large-scale fermentative hydrogen production
The use of manganese-doped magnetic carbon as an accelerator for biohydrogen production to improve hydrogen production performance has not been reported

Method used

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  • Manganese-doped magnetic carbon and preparation and application of magnetic carbon in dark fermentation hydrogen production
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  • Manganese-doped magnetic carbon and preparation and application of magnetic carbon in dark fermentation hydrogen production

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preparation example Construction

[0042] The preparation method of the manganese-doped magnetic carbon, the specific steps are as follows:

[0043] A. 1 ~ 3g MnCl 2 4H 2 O and 2.6~7.8g FeCl 3 ·6H 2 O particles were dissolved in 100-200ml of deionized water, 12-36.4g of activated carbon was added, stirred for 1-2 hours, and fully mixed to obtain a mixed solution of iron, manganese and carbon. At this time, MnCl 2 Solution concentration is 5~30g / L; FeCl 3 The concentration is 13-78g / L; the concentration of activated carbon is 60-364g / L; weigh 1.72-2.24g NaOH particles and dissolve them in deionized water to obtain a lye with a pH of 10-12 and a NaOH concentration of 34.4-129g / L;

[0044] B. The above mixed solution is heated and refluxed in an oil bath in a reactor, and the reactor is connected to a condensing reflux pipe. After the mixture boils, quickly pour 50ml of 50g / L NaOH solution into the mixture, and stir to mix;

[0045] C. The above mixed solution is boiled and refluxed at 100-130°C for 2-4 hou...

Embodiment 1

[0063] Manganese doped magnetic carbon:

[0064] a. 1.5g MnCl 2 4H 2 O and 4.1 g FeCl 3 ·6H 2 O particles were dissolved in 150ml of deionized water, 24g of activated carbon was added, stirred for 1.5h, and fully mixed to obtain a mixture of iron, manganese and carbon. MnCl 2 The solution concentration is 10g / L; FeCl 3 The concentration is 27g / L; the concentration of activated carbon is 160g / L;

[0065] b. The above mixed solution is heated and refluxed in an oil bath in a reactor, and the reactor is connected to a condensing reflux pipe; after the mixed solution boils, quickly add 50ml NaOH (50g / L) solution into the mixed solution and stir to mix;

[0066] c. The above mixed solution was boiled and refluxed at 105°C for 3 hours, and poured into a beaker to cool after the reaction was complete;

[0067] d. The mixed solution obtained in the above steps was dried at 85° C. for 10 hours to obtain manganese-doped magnetic carbon.

[0068] The prepared materials were analyze...

Embodiment 2

[0072] Manganese doped magnetic carbon:

[0073] a. 1g MnCl 2 4H 2 O and 2.6 g FeCl 3 ·6H 2 O particles were dissolved in 150ml of deionized water, then 12g of activated carbon was added, and stirred for 1 hour to ensure that they were fully mixed to obtain a mixture of iron, manganese and carbon. MnCl 2 The solution concentration is 6.7g / L; FeCl 3 The concentration is 14.4g / L; the concentration of activated carbon is 80g / L;

[0074] b. The above mixed solution is heated and refluxed in an oil bath in a reactor, and the reactor is connected to a condensation reflux pipe. After the solution boils, quickly add 50ml of 20g / L NaOH solution into the mixture and stir to mix;

[0075] c. The above mixed solution is boiled and refluxed at 100°C for 2 hours, and poured into a beaker to cool after the reaction is complete;

[0076] d. The mixed solution obtained in the above steps was dried at 75° C. for 15 hours to obtain manganese-doped magnetic carbon.

[0077] The as-prepar...

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Abstract

The invention relates to manganese-doped magnetic carbon, a preparation method of manganese-doped magnetic carbon and application of manganese-doped magnetic carbon in dark fermentation hydrogen production. According to the preparation material, iron salt and manganese salt are used as raw materials, a reaction is conducted under the alkaline and heating conditions, substances generated through the reaction are evenly loaded to the surface and pores of the carbon material, and after drying, manganese-doped magnetic carbon is obtained. Prepared manganese-doped magnetic carbon contains substrates such as MnFe2O4, Fe2O3 and MnCO3 and has the magnetism. Manganese-doped magnetic carbon is applied to the dark fermentation hydrogen production process and can release iron and manganese microelements in a liquid phase and promote activity of microorganisms; the carbon material is used as a carrier capable of gathering microorganisms and forming a biological membrane and provides a good environment for growth and propagation of microorganisms; in addition, manganese-doped magnetic carbon has unique physicochemical properties and can be effectively separated from sludge through the magnetismof manganese-doped magnetic carbon, the carbon material is recycled, and fermentation hydrogen production capacity is improved.

Description

technical field [0001] The patent of the present invention relates to the fields of composite material synthesis and clean energy production, and specifically relates to a manganese-doped magnetic carbon and its preparation and application in dark fermentation hydrogen production process. Background technique [0002] The increasing energy demand and decreasing fossil energy supply force mankind to face a series of energy crises. At the same time, the increase in the amount of pollutants such as solid waste, kitchen waste, poultry manure, agricultural solid waste and organic wastewater has led to the destruction of the ecological environment and ultimately affects human health. In order to solve this series of problems, a new type of technology must be developed to combine energy shortage and environmental pollution, and provide energy for human production and life while degrading and consuming pollutants. The dark fermentation hydrogen production process is a low-energy an...

Claims

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Application Information

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IPC IPC(8): C01B32/354C12P3/00
CPCC12P3/00C01B32/354
Inventor 张记市范传芳臧立华
Owner QILU UNIV OF TECH
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