Modified carbon material and preparation method thereof

A technology of carbon materials and modified carbon, which is applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of limited formaldehyde adsorption capacity, difficult to adsorb formaldehyde, and secondary pollution, so as to improve the adsorption and removal of formaldehyde efficiency, suitable specific surface area, and reasonable pore size distribution

Active Publication Date: 2022-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the surface of conventional activated carbon is non-polar, so the adsorption capacity of polar molecule formaldehyde is limited. In addition, the conventionally prepared activated carbon contains some extremely small micropores that are difficult to adsorb formaldehyde, and the physical adsorption of formaldehyde is easily saturated and cannot be absorbed again. On the contrary, it will cause desorption caused by excessive adsorption and cause secondary pollution. Therefore, it is necessary to conduct research on the modification and regulation of activated carbon.

Method used

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  • Modified carbon material and preparation method thereof

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Effect test

Embodiment 1

[0029]Grind the petroleum coke, potassium hydroxide, and titanium dioxide to a particle size of 20-300 meshes and mix them uniformly in a mass ratio of 1:3:0.2, at a space velocity of 300h -1 Under nitrogen atmosphere, the microwave power is 0.4kW and the temperature is raised to 900°C for activation for 30min. The product is washed with deionized water until the filtrate is neutral, and the obtained solid product is dried at 120°C for 12h to obtain carbon material A1; Airspeed 1800h -1 into CO 2 , reacted at 650°C for 90 minutes to obtain carbon material B1; carbon material B1 was used as the working electrode, graphite was used as the counter electrode, immersed in 0.5wt% HF aqueous electrolyte, voltage 20V, temperature 20 o C, react for 90 minutes, take out the anode product, wash and filter the filtrate with deionized water until the pH value of the filtrate is neutral, and dry in vacuum at 120°C for 12 hours to obtain the modified carbon material AC-1. The properties of ...

Embodiment 2

[0031] Grind the petroleum coke, potassium hydroxide, and titanium dioxide to a particle size of 20-300 meshes and mix them uniformly in a mass ratio of 1:2:0.1, at a space velocity of 200h -1 Under a hydrogen atmosphere, heat up to 850°C for activation for 50 minutes, wash the product with deionized water until the filtrate is neutral, and dry the solid product at 100°C for 18 hours to obtain carbon material A2; put it into carbon material A2 at a space velocity of 1500 hours -1 into CO 2 , reacted at 700°C for 60 minutes to obtain carbon material B2; carbon material B2 was used as the working electrode, graphite was used as the counter electrode, immersed in 0.5% ammonium fluoride ethylene glycol-20% aqueous electrolyte, voltage 10V, temperature 20 o C. After 120 minutes of reaction, the anode product was taken out, washed and filtered with deionized water until the pH of the filtrate was neutral, and vacuum-dried at 130°C for 10 hours to obtain the modified carbon material ...

Embodiment 3

[0033] Grind petroleum coke, potassium hydroxide, and manganese nitrate to a particle size of 20-300 meshes and mix them uniformly in a mass ratio of 1:4:0.23, at a space velocity of 400h -1 Under a nitrogen atmosphere, the microwave power was raised to 950°C for 30 minutes under the condition of a microwave power of 0.4kW, and the product was washed with deionized water until the filtrate was neutral. The obtained solid product was dried at 130°C for 10 hours to obtain carbon material A3; Airspeed 2000h -1 into CO 2 , reacted at 600°C for 120 minutes to obtain carbon material B3; carbon material B3 was used as the working electrode, graphite was used as the counter electrode, immersed in 0.5mol / L sodium sulfate aqueous electrolyte, voltage 10V, temperature 25 o C, reacted for 150 minutes, took out the anode product, washed and filtered with deionized water until the pH of the filtrate was neutral, and dried in vacuum at 150°C for 10 hours to obtain the modified carbon materi...

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Abstract

The invention discloses a modified carbon material and a preparation method thereof. The modified carbon material comprises a carbon material matrix and transition metal oxides distributed on the matrix, the preparation method comprises the following steps: uniformly mixing petroleum coke, an activating agent and a transition metal compound, activating, reacting to obtain a carbon material, contacting the carbon material with CO2 gas to react, finally performing anodic oxidation reaction on a reaction product, and further washing and drying to obtain the modified carbon material. The modified carbon material with high specific surface area and reasonable pore size distribution is prepared by regulating and optimizing a process route and reaction conditions, and the obtained modified carbon material can effectively adsorb and decompose formaldehyde and realize efficient adsorption and removal of formaldehyde.

Description

technical field [0001] The invention belongs to the field of catalytic materials, in particular to a modified carbon material and a preparation method thereof. Background technique [0002] Formaldehyde is a colorless gas with a pungent smell, which has a strong irritating effect on the mucous membranes of the eyes, nose, and throat. On October 27, 2017, formaldehyde was included in the list of carcinogens published by the International Agency for Research on Cancer of the World Health Organization. On the list of a class of carcinogens. [3] In the current indoor home decoration, the decorative building materials widely used all have varying degrees of formaldehyde release, which will cause serious harm to human health. "Indoor Air Quality Standards" (GB / T18883-2002) stipulates that the hygienic standard (maximum allowable mass concentration) of formaldehyde in my country's indoor air is 0.08mg / m3 (about 0.06ppm at room temperature), and the concentration of formaldehyde in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30B01D53/02B01D53/86B01D53/72C01B32/348C01B32/336C01B32/33C01B32/354
CPCB01J20/20B01J20/2808B01J20/28083B01J20/28097B01D53/02B01D53/8668C01B32/348C01B32/336C01B32/33C01B32/354
Inventor 蔡海乐张舒冬马锐张庆军王超宋永一刘继华张长安
Owner CHINA PETROLEUM & CHEM CORP
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