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Synthetic carbon nanotube catalyst taking waste gypsum as carrier and preparation method and application thereof

A technology of carbon nanotubes and multi-walled carbon nanotubes, which is applied in the field of synthesis of carbon nanotube catalysts and their preparation, can solve problems such as resource waste, achieve high conversion rates, broad market application prospects, and solve high value-added resource utilization Effect

Pending Publication Date: 2021-01-26
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is also a waste of resources for the disposal of toluene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Raw material crushing

[0028] The waste phosphogypsum and the multi-walled carbon nanotubes are respectively pulverized by a ball mill, passed through a 100-mesh standard sieve and homogenized for later use;

[0029] (2) Ingredients and granulation

[0030] Weigh 93.000g of waste phosphogypsum powder and 2.000g of multi-walled carbon nanotube powder and stir evenly, then weigh 5.000g of ethylene glycol dimethacrylate and mix with the above powder for grinding and granulation;

[0031] (3) Molding and calcination

[0032] Weigh 5.000g of the granulated mud and add it to the mold, pressurize to 5MPa, hold the pressure for 3 minutes, take out the sample, repeat the molding of the green body 20 times to obtain 20 spherical granular green bodies, and put them in the atmosphere furnace and pass through the carbon monoxide atmosphere Calcining at 400°C for 4h to obtain a granular carrier;

[0033] (4) Preparation of active component precursor composite solution

[003...

Embodiment 2

[0041] (1) Raw material crushing

[0042] The waste phosphogypsum and the multi-walled carbon nanotubes are respectively pulverized by a ball mill, passed through a 100-mesh standard sieve and homogenized for later use;

[0043] (2) Ingredients and granulation

[0044] Weigh 94.000g waste phosphogypsum powder and 1.000g multi-walled carbon nanotube powder and stir evenly, then weigh 5.000g ethylene glycol dimethacrylate and mix with the above powder for grinding and granulation;

[0045] (3) Molding and calcination

[0046] Weigh 5.000g of granulated mud and add it to the mold, pressurize to 6MPa, hold the pressure for 3 minutes, take out the sample, repeat the molding of the green body 20 times to obtain 20 spherical granular green bodies, and put them in the atmosphere furnace and pass through the carbon monoxide atmosphere Calcining at 500°C for 6h to obtain a granular carrier;

[0047] (4) Preparation of active component precursor composite solution

[0048] Weigh 15.9...

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PUM

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Abstract

The invention discloses a synthetic carbon nanotube catalyst taking waste gypsum as a carrier and a preparation method and application thereof. According to the catalyst, carbon nanotubes, waste phosphogypsum discharged during industrial phosphoric acid preparation and a forming agent are taken as carriers, and a nickel-copper composite oxide is taken as a catalytic active component. The waste ardealite, the carbon nanotubes and the forming agent are subjected to crushing, batching, granulation, forming, low-temperature atmosphere calcination and other processes to prepare a granular carrier,the granular carrier is soaked in an active component precursor composite solution, and drying and low-temperature atmosphere calcination are performed to prepare the synthetic carbon nanotube catalyst. The synthetic carbon nanotube catalyst not only can realize resource utilization of industrial waste phosphogypsum, but also can perform incomplete catalytic oxidation on an organic pollutant toluene at a low temperature to synthesize carbon nanotubes, in addition, the preparation process of the catalyst is simple, and the catalyst has a wide market application prospect.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a catalyst for synthesizing carbon nanotubes with waste gypsum as a carrier, a preparation method and application thereof. Background technique [0002] Phosphogypsum is a solid waste discharged during the production of phosphate fertilizer and phosphoric acid. About 4.5-5 tons of phosphogypsum are produced for every ton of phosphoric acid produced. The main component of phosphogypsum is CaSO 4 2H 2 O, also contains a small amount of phosphoric acid, silicon, magnesium, iron, aluminum, organic impurities, etc. Whether at home or abroad, the resource utilization of phosphogypsum is not satisfactory. The utilization rate of phosphogypsum in developed countries such as Japan, South Korea and Germany is relatively high. The utilization rate of phosphogypsum in other underdeveloped countries is relatively low, and it is generally mainly discharged (discarded) directly. This disposal meth...

Claims

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Application Information

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IPC IPC(8): B01J23/755C01B32/162
CPCB01J23/755C01B32/162Y02P20/52
Inventor 金俊阳
Owner NANJING UNIV OF TECH
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