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Method for detecting low-concentration benzene dynamic adsorption value of activated carbon fiber

A technology of activated carbon fiber and dynamic adsorption, which is applied in the detection field, can solve the problems of poor knowledge of adsorption performance, time-consuming and high-toxicity risks of benzene, etc., and achieve the effect of reducing experimental safety risks, reducing labor costs, and reducing exposure

Inactive Publication Date: 2019-08-16
NANTONG INST OF FIBER INSPECTION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, experimental devices or special detection equipment suitable for dynamic adsorption of organic vapors have not yet been popularized.
The benzene adsorption value of a large number of activated carbons and activated carbon fibers is mostly tested by the simple and easy static benzene adsorption value test, but little is known about the dynamic adsorption performance
At the same time, it is self-evident that benzene has a high risk of toxicity. Inspectors need to spend a lot of time and energy in the process of static or dynamic benzene adsorption value determination experiments, and may be exposed to benzene vapor or even high-concentration benzene vapor, which poses serious health risks. harm

Method used

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  • Method for detecting low-concentration benzene dynamic adsorption value of activated carbon fiber
  • Method for detecting low-concentration benzene dynamic adsorption value of activated carbon fiber
  • Method for detecting low-concentration benzene dynamic adsorption value of activated carbon fiber

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Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: first put the activated carbon fiber after drying into the steam generation mixing device 3, the nitrogen container 1 is connected to the gas flow meter 2, and the gas flow meter 2 is connected to the steam generation mixing container 3, and is connected to the device through the conduit 5. In the dynamic adsorption device 4, the dynamic adsorption device 4 is connected to the exhaust gas recovery container 6, and finally the change of the quality of the activated carbon fiber is measured by the computer 7. After the set adsorption time is reached, the introduction of the nitrogen container 1 is closed, and the mass data recording is ended.

[0028] Two specifications of viscose-based activated carbon fibers STF-1000 and KJF-1500 were selected, and 5 g of each was boiled in 1 L of distilled water for 2 h. After taking out, they were fully rinsed with distilled water, and dried in an oven at 105 °C for later use.

[0029] At room temperature, according to t...

Embodiment 2

[0034] The determination of embodiment 2 adsorbent ACF consumption:

[0035] For the same ACF, ACF with different masses were weighed as 0.0205g, 0.0517g, and 0.0894g, respectively. The 3 samples were subjected to the dynamic benzene adsorption test according to the method respectively, and the test results were as follows: image 3 shown.

[0036] Depend on image 3 It can be seen that although the amount of adsorbent used in the test is different for the same activated carbon fiber, the adsorption amount after adsorption equilibrium is basically the same, indicating that the dynamic benzene adsorption value of the same sample is basically the same under the test results of this method. Comparing the differences among the three, there are differences mainly in the time point when they tend to balance. When the amount of activated carbon fiber tested is small, the time for the adsorption to reach equilibrium is short, about 10 minutes; and when the quality is high, the equi...

Embodiment 3

[0037] The determination of embodiment 3 adsorption time:

[0038] 5 pieces of ACF samples, the sampling volume of ACF1~5 is about 0.05g respectively, the measured dynamic adsorption curve of benzene is as follows Figure 4 shown. It can be found that the equilibration time of different ACF samples is different as marked by the dotted line. For the versatility of the experimental method, the single experiment time should ensure the adsorption equilibrium, therefore, the adsorption time was set to 60 min.

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Abstract

The invention discloses a method for detecting a low-concentration benzene dynamic adsorption value of an activated carbon fiber. A stable low-concentration benzene steam flow is provided in a detection process; a mass increment data change condition of an adsorbent is automatically recorded; the benzene dynamic adsorption value of the activated carbon fiber is accurately calculated; and a dynamicadsorption curve is drawn. According to the method, closed environment detection and automatic data recording of dynamic adsorption values of the activated carbon fiber to various low-concentration organic matters including benzene can be realized; the experimental safety risk is effectively reduced; and the experiment efficiency and the result accuracy are improved.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a detection method for the low-concentration benzene dynamic adsorption value of activated carbon fibers, which can accurately and quantitatively determine the benzene dynamic adsorption value, and is particularly suitable for the determination of low-concentration organic matter adsorption by activated carbon fibers. Background technique [0002] Activated Carbon Fiber (ACF) is called the third-generation activated carbon product, which can make up for some of the shortcomings of traditional granular activated carbon and powdered activated carbon. The commodity forms of ACF include fabric (cloth), non-woven fabric (felt), paper, single fiber and rope, etc., which can be regarded as a special fiber material. At the same time, based on the superior pore structure and morphology compared with ordinary activated carbon, ACF can be used as a functional material and widely used in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02
CPCG01N5/02
Inventor 徐鸿燕葛元宇李胜臻
Owner NANTONG INST OF FIBER INSPECTION
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