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A kind of activated carbon fiber adsorbent and its preparation method and its application in the adsorption of benzene series

A technology of activated carbon fiber and adsorbent, applied in the field of volatile organic compound treatment, can solve the problems of low introduction amount and uneven distribution, etc.

Active Publication Date: 2020-07-28
上海申丰地质新技术应用研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, inorganic boron-based compounds are used as boron-containing precursors to modify carbonaceous porous materials. The boron element only reacts with certain types of functional groups or sites with high activity on activated carbon, and the introduction amount is low and the distribution is also low. uneven

Method used

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  • A kind of activated carbon fiber adsorbent and its preparation method and its application in the adsorption of benzene series
  • A kind of activated carbon fiber adsorbent and its preparation method and its application in the adsorption of benzene series
  • A kind of activated carbon fiber adsorbent and its preparation method and its application in the adsorption of benzene series

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preparation example Construction

[0028] The invention provides a kind of activated carbon fiber adsorbent (B-C 3 N 4 / ACF) preparation method, comprises the following steps:

[0029] (1) Boron precursor, water-soluble nitrogen-containing organic matter, coagent, surfactant and water are mixed to obtain a mixed solution, and the coagent is glucose, citric acid or ascorbic acid; the boron precursor is meta-amino Phenylboronic acid, p-aminophenylboronic acid, m-cyanophenylboronic acid or p-cyanophenylboronic acid;

[0030] (2) After the mixed solution obtained in the step (1) is mixed with activated carbon fibers, hydrothermal reaction is carried out to obtain an activated carbon fiber adsorbent.

[0031] The present invention mixes the boron precursor, water-soluble nitrogen-containing organic matter, coagent, surfactant and water to obtain a mixed solution, the coagent is glucose, citric acid or ascorbic acid; the boron precursor is m-aminobenzene Boric acid, p-aminophenylboronic acid, m-cyanophenylboronic ...

Embodiment 1

[0060] Using m-aminophenylboronic acid as boron precursor, urea as water-soluble nitrogen-containing organic matter, and glucose as active auxiliary agent, prepare 100 g of mixed solution according to the mass ratio of 1:1:0.5:97.5, and add 1 g of boric acid monoglyceride monofatty acid ester As a surfactant, stir at room temperature until complete dissolution.

[0061] Weigh 200g of viscose-based activated carbon fiber, dip it in the mixed solution prepared above, stir evenly, then conduct hydrothermal reaction at a constant temperature of 120°C for 1h, then sonicate for 0.1h, and then dry at 80°C for 12h to obtain the coated The amount of 1% boron-doped nitrogen carbide modified activated carbon fiber adsorbent (1% B-C 3 N 4 / ACF).

[0062] The original viscose-based activated carbon fiber and the activated carbon fiber adsorbent prepared in Example 1 were respectively packed in a fixed-bed reactor, the reaction temperature was controlled at 20°C, and benzene-containing ga...

Embodiment 2

[0064] With p-aminophenylboronic acid as the boron precursor, cyanamide as the water-soluble nitrogen-containing organic matter, and citric acid as the active auxiliary agent, 100 g of the mixed solution was prepared in a mass ratio of 15:15:5:65, and 5 g of boric acid monoglyceride poly Oxyethylene mono-fatty acid ester is used as a surfactant, and stirred at room temperature until complete dissolution.

[0065] Weigh 30g of viscose-based activated carbon fiber and 40g of polyacrylonitrile-based activated carbon fiber, 70g in total, dip into the mixed solution prepared above, stir evenly, then carry out hydrothermal reaction at 220°C for 48h, then ultrasonic for 6h, and then in Drying at 110°C for 48h, the activated carbon fiber adsorbent (30%B-C 3 N 4 / ACF).

[0066] The original activated carbon fiber and the modified activated carbon fiber adsorbent obtained in Example 2 are packed in a fixed bed reactor respectively, the reaction temperature is controlled at 80° C., and...

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Abstract

The invention provides an active carbon fiber adsorbent preparation method, which belongs to the field of processing of a volatile organic compound. The method comprises the following steps: mixing aboron precursor, a water-soluble nitrogenous organic substance, an active auxiliary agent, a surfactant and water to obtain a mixed solution, wherein the active auxiliary agent is glucose, citric acidor ascorbic acid, and the boron precursor is m-aminophenylboronic acid, p-aminophenylboronic acid, m-cyanophenylboronic acid or p-cyanophenylboronic acid; and mixing the mixed solution and the activecarbon fiber and performing a hydro-thermal reaction to obtain the active carbon fiber adsorbent. The active carbon fiber adsorbent can generate a fluffy boron doped nitrogen carbide coating layer with a nano size, uniform distribution, high boron element content and taking an active B-N bond as a main form on the active carbon surface, content of boron and nitrogen elements of the surface of a carbon material can be greatly increased, the benzene series adsorption and desorption performance by the active carbon fiber adsorbent is increased, and the cycle adsorption performance of the activecarbon fiber adsorbent can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of volatile organic matter treatment, in particular to an activated carbon fiber adsorbent, a preparation method thereof and an application in the adsorption of benzene series. Background technique [0002] Volatile organic compounds (VOCs), such as benzene series, hydrocarbons, aldehydes, ketones, ethers, amines, and alcohols, are common pollutants in the atmospheric environment. Common treatment methods for volatile organic waste gas include adsorption method, absorption method, catalytic combustion method, regenerative combustion method, etc. Among them, the adsorption method is one of the most widely used VOCs treatment technologies due to its advantages of simple operation, low one-time equipment investment and low energy consumption. [0003] Activated carbon fiber (ACF) is a new type of carbonaceous adsorption material. Compared with traditional granular activated carbon (granular activated carbon), ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01D53/02B01D2257/7027B01J20/20
Inventor 郦胜孙秀容张小会沈凌常继兵王珂杨佩佩郦逸根
Owner 上海申丰地质新技术应用研究所有限公司
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