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Preparation method of composite of biochar-carbon nano-material

A carbon nanomaterial, biomass carbon technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve the problem of increasing the cost of carbon nanomaterials and limiting carbon nanomaterials. Industrialization development and other issues, to achieve the effect of saving catalyst cost, realizing catalyst circulation and simple operation

Active Publication Date: 2016-02-03
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

However, metal-supported catalysts and metal-organic compound catalysts are mainly used now. The catalytic active components are mainly Fe, Co, Ni, Mg, Al or their alloys. The catalyst carrier SiO 2 , Al 2 o 3 , MgO, La 2 o 3 etc., but the use of these catalysts increases the cost of preparing carbon nanomaterials, which limits the industrial development of carbon nanomaterials

Method used

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  • Preparation method of composite of biochar-carbon nano-material
  • Preparation method of composite of biochar-carbon nano-material
  • Preparation method of composite of biochar-carbon nano-material

Examples

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Embodiment example 1

[0027] Use rice husk as biomass raw material, take quantitative rice husk and crush, add nickel nitrate according to the ratio of biomass:metal salt is 10:1, add appropriate amount of deionized water, stir for 3 hours at room temperature, and dry in a drying oven at 105°C . Take out the dried mixture, put it in the CVD furnace, feed nitrogen gas at a flow rate of 50ml / min, exhaust the air in the furnace, turn on the power, raise the temperature to 450°C at a heating rate of 20°C / min, and then turn it off Nitrogen, 100ml / min hydrogen was introduced to reduce the metal salt, the reduction time was 2h, then the hydrogen was turned off and the nitrogen was continued at the original rate.

[0028] On the basis of the above process, continue to raise the temperature to 800°C and keep it for 90min. After cooling down to 600°C, then according to CH 4 :N 2 =0.8:1 into the mixed gas, the flow rate of the mixed gas is 180ml / min, after 1 hour under this condition, the carbon source is ...

Embodiment example 2

[0030] Using corncobs as biomass raw materials, take quantitative corncobs and crush them, add ferric nitrate according to the ratio of biomass:metal salt is 10:1, add appropriate amount of deionized water, stir at room temperature for 3 hours, and dry in a drying oven at 105°C . Take out the dried mixture, put it in the CVD furnace, feed nitrogen gas at a flow rate of 50ml / min, exhaust the air in the furnace, turn on the power, raise the temperature to 500°C at a heating rate of 20°C / min, and then turn it off Nitrogen, 100ml / min hydrogen was introduced to reduce the metal salt, the reduction time was 2h, then the hydrogen was turned off and the nitrogen was continued at the original rate.

[0031] On the basis of the above process, continue to keep the temperature at 500°C for 90 minutes. After that, the temperature was raised to 600°C, and then according to CH 4 :H 2 :N 2 =1:1:2 into the mixed gas, the flow rate of the mixed gas is 200ml / min, after maintaining this condi...

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Abstract

The invention discloses a preparation method of a composite of a biochar-carbon nano-material, and particularly relates to a compound of a biochar-carbon nano-material, which is prepared by taking cheap and easily-available biomass as a raw material, mixing the biomass with a mixed transition metallic oxide for catalysis and carbonization, utilizing a residual metallic oxide and generated metal-based biochar in carbonization as a catalyst, and growing a carbon nano-material on the surface of the catalyst through vapor deposition.

Description

technical field [0001] The invention belongs to the field of new materials, and relates to a preparation method and application of a metal-based biomass charcoal-carbon nanomaterial composite. Background technique [0002] Biomass resources are playing an increasingly important role in sustainable development because of their widespread occurrence in nature and their recyclability. The utilization of biomass has also gradually shifted from the direct utilization of resource waste to the biomass conversion process of resource utilization. Among them, the pyrolysis of biomass to produce charcoal replaces the direct combustion of biomass, which reduces the annual carbon emissions into the atmosphere by 12%. Carbon-rich biochar prepared from biomass has also begun to be studied in depth. At present, biochar is widely used in alternative energy, soil improvement, adsorbent, preparation of activated carbon, sewage treatment, etc., and has achieved good results. The utilization ...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J23/755B01J23/745B01J20/30
Inventor 宋敏卫月星唐心红徐娟
Owner SOUTHEAST UNIV
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