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Preparation of nitrogen-doped biochar material and method for improving dark fermentation hydrogen production performance

A technology of biochar and nitrogen doping, applied in fermentation, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low hydrogen production efficiency, complicated process, and low nitrogen content in dark fermentation, and reduce redox The effect of potential, sufficient uptake, and strong adsorption capacity

Active Publication Date: 2020-05-08
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of low nitrogen content, high cost, complex process and low efficiency of dark fermentation hydrogen production in the prior art in the preparation process of nitrogen-doped carbon materials, and to provide a simple production process, green and environmentally friendly , low-cost nitrogen-doped biochar, and applied it to nitrogen-doped biochar for the first time to improve the hydrogen production performance of dark fermentation

Method used

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  • Preparation of nitrogen-doped biochar material and method for improving dark fermentation hydrogen production performance
  • Preparation of nitrogen-doped biochar material and method for improving dark fermentation hydrogen production performance
  • Preparation of nitrogen-doped biochar material and method for improving dark fermentation hydrogen production performance

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Nitrogen-doped biochar preparation:

[0044] (1) Mix 40g of corncob powder and 20g of melamine together, dissolve them in 160ml of deionized water, then cook them in a high-pressure steam sterilizer at 120°C for 2 hours, and take them out after cooling down to room temperature.

[0045] (2) Separating the turbid liquid obtained from the above steps into solid-liquid, vacuum drying at 80°C, adding 150ml of zinc chloride solution (3mol / L), soaking for 24h, drying in vacuum at 80°C for 24h, and taking out the sample.

[0046] (3) Put the sample obtained in the above steps into a tubular sintering furnace. The initial temperature of the tubular sintering furnace is 50°C, and the temperature in the furnace cavity is raised to 700°C at a rate of 10°C / min, and the holding time is 3h. After cooling to room temperature 25°C, the sample was taken out.

[0047] (4) Wash the sample obtained in the above steps with 2 mol / L hydrochloric acid, and then wash it with a certain amount o...

Embodiment 2

[0051] Nitrogen-doped biochar preparation:

[0052] (1) Mix 40g of corncob powder and 20g of melamine together, dissolve them in 160ml of deionized water, then cook them in a high-pressure steam sterilizer at 120°C for 2 hours, and take them out after cooling down to room temperature.

[0053] (2) The turbid liquid obtained in the above steps was subjected to solid-liquid separation, and after vacuum drying at 80°C, 150ml of zinc chloride solution (3mol / L) was added, soaked for 24h, dried under vacuum at 80°C for 24h, and the sample was taken out.

[0054] (3) Put the sample obtained in the above steps into a tubular sintering furnace. The initial temperature of the tubular sintering furnace is 50°C, and the temperature in the furnace cavity is raised to 800°C at a rate of 10°C / min, and the holding time is 3h. The samples were taken out after cooling to room temperature.

[0055] (4) Wash the sample obtained in the above steps with 2mol / L hydrochloric acid, and then wash it w...

Embodiment 3

[0058] Nitrogen doped carbon preparation:

[0059] (1) Mix 40g of corncob powder and 20g of melamine together, dissolve in 160ml of deionized water, then cook in a high-pressure steam sterilizer at 120°C for 2 hours, and take it out after cooling down to room temperature.

[0060] (2) The turbid liquid obtained in the above steps was subjected to solid-liquid separation, and after vacuum drying at 80°C, 150ml of zinc chloride solution (3mol / L) was added, soaked for 24h, dried under vacuum at 80°C for 24h, and the sample was taken out.

[0061] (3) Put the sample obtained in the above steps into a tubular sintering furnace. The initial temperature of the tubular sintering furnace is 50°C, and the temperature in the furnace cavity is raised to 800°C at a rate of 10°C / min, and the holding time is 2h. The samples were taken out after cooling to room temperature.

[0062] (4) Wash the sample obtained in the above steps with 2mol / L hydrochloric acid, and then wash it with a certain...

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Abstract

The invention provides nitrogen-doped biochar which is simple in production process and low in green cost, and the nitrogen-doped biochar is applied to the process of improving the dark fermentation hydrogen production performance for the first time. The nitrogen-doped biochar material takes corncob powder and melamine as raw materials; the high-nitrogen-doped biochar material is finally obtainedthrough high-pressure and high-temperature cooking, activator dipping, nitrogen atmosphere carbonization, washing and drying, and the bottleneck that in the prior art, the nitrogen-doped biochar material preparation process is low in nitrogen content, high in cost and complex in process, and dark fermentation hydrogen production efficiency is low is overcome.

Description

technical field [0001] The invention relates to the fields of composite material synthesis and clean energy production, and relates to the preparation of a nitrogen-doped biochar material and a method for improving the hydrogen production performance of dark fermentation. Background technique [0002] Hydrogen is considered to be the most ideal clean energy. Because it is non-polluting, renewable, and has a high calorific value, it is an ideal alternative energy source for fossil fuels. However, many current hydrogen production technologies have defects of high cost or serious pollution, making it difficult to realize Industrialization promotion and utilization. Among many hydrogen production methods, biological hydrogen production has the advantages of wide source of raw materials, low price, mild reaction process, less pollution and renewable products. Biological hydrogen production includes light-driven hydrogen production and dark fermentation hydrogen production. Dark...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10
CPCB01J27/24C12P3/00B01J35/60B01J35/61Y02E50/30
Inventor 张记市杨梦琛赵文谦臧立华
Owner QILU UNIV OF TECH
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