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Method for predicting adsorption capacity of activated carbon to volatile organic compounds

A volatile organic compound and activated carbon adsorption technology, which is applied in the direction of chemical property prediction, separation methods, chemical instruments and methods, etc., can solve the problems of few influencing factors and low accuracy, and achieve simple operation, high accuracy and wide application range Effect

Active Publication Date: 2021-03-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, many studies focus on the development of porous materials with high selectivity and high adsorption capacity, but there are few studies on the prediction of activated carbon's adsorption capacity for VOCs, and there are few influencing factors considered. Only the physical and chemical properties of VOCs or adsorption materials are considered. Physical and chemical properties, low accuracy, and large limitations in application range

Method used

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  • Method for predicting adsorption capacity of activated carbon to volatile organic compounds
  • Method for predicting adsorption capacity of activated carbon to volatile organic compounds
  • Method for predicting adsorption capacity of activated carbon to volatile organic compounds

Examples

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Embodiment 1

[0030] Predict the adsorption capacity of activated carbon for ethanol in a published literature; the specific surface area of ​​activated carbon: 766m 2 / g, total pore volume: 0.41cm 3 / g, surface oxygen content: 8%; adsorption temperature: 30°C, ethanol concentration: 800ppm, relative humidity: 50%; ethanol molecular weight: 46g / mol, boiling point: 78°C, polarity: 1.69D.

[0031] Three groups of adsorption data of methanol, ethanol, and n-propanol on activated carbon were collected. The difference between predicted physical and chemical properties of activated carbon and adsorption conditions is ≤±5%. The selected methanol, ethanol, and n-propanol belong to the same category as the ethanol to be predicted. The specific values ​​of the physical and chemical properties of methanol, ethanol, and n-propanol are shown in Table 1.

[0032] Taking the boiling point (°C), molecular weight (g / mol) and polarity (D) of VOCs as the abscissa and the adsorption amount (mg / g) as the ordina...

Embodiment 2

[0053] Predict the adsorption capacity of a kind of activated carbon for toluene in the laboratory; the specific surface area of ​​activated carbon: 987.1m 2 / g, total pore volume: 0.47cm 3 / g, surface oxygen content: 7.3%; adsorption temperature: 40°C, toluene concentration: 500ppm, relative humidity: 80%; toluene molecular weight: 92g / mol, boiling point: 110.6°C.

[0054] The adsorption data of three groups of toluene, benzene, and p-xylene on activated carbon were collected. The difference between the predicted physical and chemical properties of activated carbon and adsorption conditions is ≤±5%. The selected toluene, benzene, and p-xylene belong to the same category as the toluene to be predicted. The specific values ​​of the physical and chemical properties of toluene, benzene, and p-xylene are shown in Table 2.

[0055] Taking the boiling point (°C), molecular weight (g / mol) and polarity (D) of VOCs as the abscissa and the adsorption amount (mg / g) as the ordinate, the ...

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Abstract

The invention discloses a method for predicting the adsorption capacity of activated carbon to volatile organic compounds. The method is based on adsorption data of a plurality of groups of VOCs on the activated carbon. The method comprises the following steps: after carrying out linear fitting on a single characteristic and adsorption capacity, respectively screening out two certain properties oradsorption conditions with greater influence on the adsorption capacity from VOCs physicochemical characteristics, activated carbon physicochemical characteristics and adsorption conditions, and obtaining an influence factor calculation method of the VOCs physicochemical characteristics, activated carbon physicochemical characteristics and adsorption conditions on the adsorption capacity; and respectively defining adsorption capacities taking VOCs physicochemical properties, activated carbon physicochemical properties and adsorption conditions as variables. On this basis, an association formula between the VOCs aggregate characteristic influence factor, the activated carbon aggregate characteristic influence factor and the total adsorption condition influence factor and the predicted activated carbon adsorption capacity is established, and the method can be used for predicting the adsorption capacity of VOCs on activated carbon. The method is simple to operate, high in accuracy and wide in application range, and has obvious advantages in the aspect of predicting the VOCs adsorption capacity.

Description

technical field [0001] The invention relates to the field of industrial waste gas treatment, in particular to a method for predicting the adsorption capacity of activated carbon to volatile organic substances. [0002] technical background [0003] Volatile organic compounds (VOCs) have become 2 , NO x The last important air pollutant mainly comes from the petrochemical industry, pharmaceutical industry, electric power industry, spraying industry, etc., and its emissions are increasing year by year. VOCs are highly toxic and carcinogenic, not only causing damage to the ecological environment (forming photochemical smog, ozone, etc.), but also seriously threatening human health (causing nausea, headaches, lung cancer, etc.). The current treatment methods of VOCs mainly include adsorption, absorption, membrane separation, catalytic oxidation, biodegradation, thermal oxidation, plasma catalysis, etc. Among various treatment methods, the adsorption method is widely used in ind...

Claims

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Application Information

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IPC IPC(8): G16C20/20G16C20/30G16C20/90B01D53/02
CPCG16C20/20G16C20/90G16C20/30B01D53/02B01D2253/102B01D2257/708Y02A50/20
Inventor 杨林军马修卫
Owner SOUTHEAST UNIV
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