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

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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Example Embodiment

[0042] Example 1

[0043] Nitrogen-doped biochar preparation:

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

[0045] (2) Carry out solid-liquid separation of the turbid liquid obtained in the above steps, add 150ml zinc chloride solution (3mol / L) after vacuum drying at 80°C, immerse for 24h, vacuum dry at 80°C for 24h, and take 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. The sample was taken out after cooling to room temperature 25°C.

[0047] (4) The sample prepared in the above steps is first washed with 2mol / L hydrochloric acid, and then washed with a certain amo...

Example Embodiment

[0050] figure 2 with image 3 The scanning electron microscope showed that the morphology of nitrogen-doped biochar and non-nitrogen-doped biochar have rich pore structure, but the average pore diameter of nitrogen-doped biochar is finer, which is suitable for the attachment and growth of microorganisms. . Elemental analysis showed that the atomic percentages of C, N, O, Zn and Cl in the obtained nitrogen-doped biochar were 59.31%, 27.19%, 10.87%, 1.73% and 0.90%, respectively. Nitrogen-doped biochar specific surface area 831.125m 2 / g, average pore diameter 6.78nm, pore volume 0.52m 3 / g. Example 2

[0051] Nitrogen-doped biochar preparation:

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

[0053] (2) Carry out solid-liquid separation of the turbid liquid obtained in the above steps. After vacuu...

Example Embodiment

[0057] Example 3

[0058] Preparation of nitrogen-doped carbon:

[0059] (1) Mix 40g corncob flour and 20g melamine together, dissolve it in 160ml deionized water, and then steam it in an autoclave at 120°C for 2h, and take it out after it drops to room temperature.

[0060] (2) Carry out solid-liquid separation of the turbid liquid obtained in the above steps. After vacuum drying at 80°C, 150ml of zinc chloride solution (3mol / L) is added, immersed for 24h, vacuum dried at 80°C for 24h, and the sample is 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. Take out the sample after cooling to room temperature.

[0062] (4) The sample prepared in the above steps is first washed with 2mol / L hydrochloric acid, and then washed with a certain amount of deionized water ...

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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
CPCB01J27/24B01J35/1004B01J35/10C12P3/00Y02E50/30
Inventor 张记市杨梦琛赵文谦臧立华
Owner QILU UNIV OF TECH
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