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A preparation method of nickel-doped magnetic carbon and its application in hydrogen production by dark fermentation

A magnetic carbon and dark fermentation technology, applied in fermentation, chemical instruments and methods, nickel oxide/nickel hydroxide, etc., can solve the problems of reducing the promotion effect, unable to change the hydrogen production pathway of dark fermentation, unfavorable fermentation hydrogen production, etc.

Active Publication Date: 2021-11-19
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the above-mentioned patent also has the following defects: (1) the manganese-doped magnetic carbon contains relatively high chlorine element, and the mass percentage of chlorine is 10.5%, and the excessively high chloride ion concentration is unfavorable for the carrying out of fermentative hydrogen production
(2) Manganese-doped magnetic carbon contains substances insoluble in organic acids, which reduces the promotion effect
(3) Manganese-doped magnetic carbon has no selectivity for bacterial flora, and cannot optimize the microbial community structure in the hydrogen fermentation system
(4) Manganese-doped magnetic carbon cannot change the hydrogen production pathway of dark fermentation

Method used

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  • A preparation method of nickel-doped magnetic carbon and its application in hydrogen production by dark fermentation
  • A preparation method of nickel-doped magnetic carbon and its application in hydrogen production by dark fermentation
  • A preparation method of nickel-doped magnetic carbon and its application in hydrogen production by dark fermentation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Preparation of nickel-doped magnetic carbon:

[0056] (1) 5.41g FeCl 3 ·6H 2 O and 2.38 g NiCl 2 ·6H 2 O dissolved in 150 mL H 2 O, get Fe 3+ and Ni 2 + mixture.

[0057] (2) Add 12g activated carbon to Fe 3+ and Ni 2+ In the mixed solution, stir and impregnate for 1h to obtain activated carbon, Fe 3+ and Ni 2+ Suspension, FeCl 3 ·6H 2 O solution concentration is 36.07g / L; NiCl 2 ·6H 2 O concentration is 15.87g / L; activated carbon concentration is 80g / L.

[0058] (3) 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 suspension is kept boiling at 120°C and heated for 30 minutes, 50mL NaOH solution (20g / L) is quickly poured into it and stirred , Then keep boiling and reflux for 2h, pour into a beaker to cool after the reaction is complete.

[0059] (4) After cooling, the reaction product was washed with deionized water until neutral, and dried at 80°C for 24 hou...

Embodiment 2

[0080] (1) Preparation of nickel-doped magnetic carbon:

[0081] (1) 10.82g FeCl 3 ·6H 2 O and 2.38 g NiCl 2 ·6H 2 O dissolved in 150 mL H 2 O, get Fe 3+ and Ni 2+ mixture.

[0082] (2) Add 12g activated carbon to Fe 3+ and Ni 2+ In the mixed solution, stir and impregnate for 1h to obtain activated carbon, Fe 3+ and Ni 2+ Suspension, FeCl 3 ·6H 2 O solution concentration is 72.13g / L; NiCl 2 ·6H 2 O concentration is 15.87g / L; activated carbon concentration is 80g / L.

[0083] (3) 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 suspension is kept boiling at 120°C and heated for 30 minutes, 50mL NaOH solution (20g / L) is quickly poured into it and stirred , Then keep boiling and reflux for 2h, pour into a beaker to cool after the reaction is complete.

[0084] (4) After cooling, the reaction product was washed with deionized water until neutral, and dried at 80°C for 12 ...

Embodiment 3

[0095] (1) Preparation of nickel-doped magnetic carbon:

[0096] (1) 6g FeCl 3 ·6H 2 O and 2.64 g NiCl 2 ·6H 2 O dissolved in 200 mL H 2 O, get Fe 3+ and Ni 2+ mixture.

[0097] (2) Add 6.64g of activated carbon to Fe 3+ and Ni 2+ In the mixed solution, stir and impregnate for 1h to obtain activated carbon, Fe 3+ and Ni 2+ Suspension, FeCl 3 ·6H 2 O solution concentration is 30g / L; NiCl 2 ·6H 2 O concentration is 13.2g / L; activated carbon concentration is 33.2g / L.

[0098] (3) 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 suspension is kept boiling at 110°C and heated for 30 minutes, 50mL NaOH solution (28g / L) is quickly poured into it and stirred , Then keep boiling and reflux for 3h, and pour into a beaker to cool after the reaction is complete.

[0099](4) After cooling, the reaction product was washed with deionized water until neutral, and dried at 80°C for 1...

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Abstract

The invention provides a nickel-doped magnetic carbon and its preparation method and application, the main components of which are activated carbon, NiFe 2 o 4 and a small amount of Ni(OH) 2 , and NiFe 2 o 4 and Ni(OH) 2 Uniformly attached to the surface and pores of activated carbon. The nickel-doped magnetic carbon of the present invention can selectively improve the activity of microorganisms under medium temperature conditions, optimize the microbial community structure in the hydrogen fermentation system; and under high temperature conditions, the fermentation pathway can be converted from ethanol fermentation to butyric acid Type fermentation, and the latter is more conducive to the production of hydrogen.

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 method for preparing nickel-doped magnetic carbon and its application in the process of dark fermentation hydrogen production. Background technique [0002] Rising oil prices, limited fossil fuel reserves, environmental degradation and concerns about impending climate change have driven a collective search for renewable energy. Hydrogen is an ideal new energy source, its calorific value is 2.72 times that of ethanol, 2.42 times that of methane, 3.0 times that of methanol, and 3.82 times that of dimethyl ether, and the combustion product is only water, without generating smoke, CO 2 , NO X and SO X It is the cleanest fuel. At present, the main production processes of hydrogen include: hydrogen production by electrolysis of water, hydrogen production by biomass cracking, hydrogen production from fossil ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/354C01G53/00C01G53/04C12P3/00
CPCC01G53/00C01G53/04C01P2002/72C01P2004/42C01P2006/17C12P3/00C01B32/354
Inventor 张记市赵文谦杨梦琛臧立华
Owner QILU UNIV OF TECH
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