A kind of modified adsorbent and preparation method thereof

An adsorbent and modification technology, which is applied in the field of modified adsorbent and its preparation, can solve the problems of high energy consumption for activated carbon fiber regeneration, difficulty in meeting emission standards, and high desorption temperature, so as to eliminate the accumulation of adsorption heat and improve the recovery rate , High adsorption and desorption efficiency

Active Publication Date: 2022-04-08
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Modified adsorbent, using activated carbon fiber as the adsorbent, by modifying the activated carbon fiber, the fiber is carbonized, the specific surface is increased, and the adsorption efficiency is improved; in the desorption process, (iso) octanol and water are used to Boiling characteristics, can quickly and effectively desorb and regenerate activated carbon fibers, and solve the problems of low adsorption rate and high desorption temperature in the existing (iso)octanol adsorption technology, which lead to high energy consumption for activated carbon fiber regeneration and (iso)octanol in exhaust gas. It is still difficult to meet the emission standards after adsorption, and improve the use efficiency of activated carbon fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Use commercially available activated carbon fibers of the T1300 series, use butanol as a solvent, prepare arylphosphine or its derivatives and phosphoric acid or phosphate in proportion to the concentration of the activation solution, stir well, and impregnate the carbon fiber in the activation solution. In the solution, the activation solution should submerge the carbon fiber by about 1 cm. The temperature during the impregnation process is 45°C, and the impregnation time is 12 hours. Take it out, filter it, dry it in the sun, and then dry it in an oven at 95°C to a constant weight. Then it is placed in a muffle furnace, heated in a nitrogen environment, the heating temperature is 160 ° C, and the heating time is 60 minutes to obtain modified activated carbon fibers;

[0038] 2) Put the modified activated carbon fiber into the adsorber of the adsorption device; the adsorption device includes 3 adsorbers, and always maintain one adsorption, one dry, and one adsorption...

Embodiment 2

[0041] 1) Use commercially available activated carbon fibers of the T1300 series, use butanol as a solvent, prepare arylphosphine or its derivatives and phosphoric acid or phosphate in proportion to the concentration of the activation solution, stir well, and impregnate the carbon fiber in the activation solution. In the solution, the activation solution should submerge the carbon fiber by about 1 cm. The temperature during the impregnation process is 35°C, and the impregnation time is 16 hours. Take it out, filter it, dry it in the sun, and then dry it in an oven at 92°C to a constant weight. Then place it in a muffle furnace, heat in a nitrogen environment, the heating temperature is 140 ° C, and the heating time is 75 minutes to obtain modified activated carbon fibers;

[0042] 2) Put the modified activated carbon fiber into the adsorber of the adsorption device; the adsorption device includes 3 adsorbers, and always maintain one adsorption, one dry, and one adsorption satur...

Embodiment 3

[0045] 1) Use commercially available activated carbon fibers of the T1300 series, use butanol as a solvent, prepare arylphosphine or its derivatives and phosphoric acid or phosphate in proportion to the concentration of the activation solution, stir well, and impregnate the carbon fiber in the activation solution. In the solution, the activation solution should submerge the carbon fiber by about 1 cm. The temperature during the impregnation process is 65°C, and the impregnation time is 13 hours. Take it out, filter it, dry it in the sun, and then dry it in an oven at 98°C to a constant weight. Then place it in a muffle furnace and heat it in a nitrogen environment at a heating temperature of 180°C for a heating time of 35 minutes to obtain modified activated carbon fibers;

[0046] 2) Put the modified activated carbon fiber into the adsorber of the adsorption device; the adsorption device includes 3 adsorbers, and always maintain one adsorption, one dry, and one adsorption satu...

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Abstract

A modified adsorbent and a preparation method thereof belong to the technical field of exhaust gas treatment. It is characterized in that the composition is: activated carbon fiber modified with a compound of arylphosphine or its derivatives and phosphoric acid or phosphate, wherein the mass ratio of arylphosphine or its derivatives to phosphoric acid or phosphate is 0.18-6: 1. Preparation steps: 1) Use the complex of arylphosphine or its derivatives and phosphoric acid or phosphate as the activator, and use butanol as the solvent to prepare an activation solution with a total mass concentration of the activator of 1-10%, and impregnate the carbon fiber Immerse in the activation solution for 10-36 hours; 2) filter to remove the butanol solution, heat and activate in an inert gas at a temperature of 120-200°C, and obtain a modified activated carbon fiber adsorbent after cooling. The adsorbent of the invention has high desorption efficiency and long service life of the activated carbon fiber, which fundamentally solves the problem of low octanol absorption and desorption efficiency.

Description

technical field [0001] A modified adsorbent and a preparation method thereof belong to the technical field of exhaust gas treatment. Background technique [0002] Common treatment methods for organic waste gas include absorption, adsorption, condensation, combustion, and membrane separation methods. The recovery of valuable organic matter in waste gas generally uses condensation, adsorption, membrane separation methods, or their combination methods. With the increasingly stringent national environmental protection regulations, the use of activated carbon fibers as adsorbents to treat waste gas has become a research hotspot for scholars at home and abroad in recent years. Unlike organic pollutants such as ethanol, butanol, benzene, and toluene, (iso)octanol brings great difficulty to its waste gas treatment because of its high boiling point and high liquid viscosity. [0003] (Iso) octanol is a colorless transparent oily liquid with a pungent odor, a boiling point (standard ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/02B01D53/26B01D53/00B01J20/20B01J20/34B01J20/30
CPCB01D53/002B01D53/02B01D53/26B01J20/3416B01J20/20B01D2253/102B01D2257/7027
Inventor 菅秀君马瑞杰贾庆龙朱相春王申军解洪梅
Owner CHINA PETROLEUM & CHEM CORP
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