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Viscose-based nitrogen-containing active carbon fiber material as well as preparation method and application thereof

A technology of activated carbon fiber and viscose fiber, which is applied in the field of viscose-based nitrogen-containing activated carbon fiber materials and its preparation, can solve the problems that the adsorption performance cannot meet the use requirements, and achieve effective reuse, obvious economic benefits, and reduce energy consumption cost effect

Active Publication Date: 2021-07-02
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide a viscose-based nitrogen-containing activated carbon fiber material with a large specific surface area and high porosity and its preparation method and application, so as to solve the problem that the adsorption performance of the existing viscose-based nitrogen-containing activated carbon fiber material cannot meet the use requirements The problem

Method used

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  • Viscose-based nitrogen-containing active carbon fiber material as well as preparation method and application thereof
  • Viscose-based nitrogen-containing active carbon fiber material as well as preparation method and application thereof
  • Viscose-based nitrogen-containing active carbon fiber material as well as preparation method and application thereof

Examples

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preparation example Construction

[0064] Concrete, the preparation method of viscose base nitrogen-containing activated carbon fiber of the present invention, comprises the following steps:

[0065] (1) Pretreatment

[0066] First, the waste viscose fabric is ultrasonically cleaned in ethanol and deionized water in sequence to remove dust and impurities on the fiber surface, and then dried;

[0067] Then, with NH 4 Cl and ZnCl 2 The mixed salt solution soaks the dried viscose fiber fabric for 60min, using the mixed salt solution can increase the output after calcination and reduce the ash content; then dry it; wherein, NH 4 Cl and ZnCl 2 The concentration of the mixed salt solution is: 5wt% NH 4 Cl and 5wt% ZnCl 2 , dried in a drying oven at 60°C for 240 minutes after soaking;

[0068] (2) Activation-carbonization treatment

[0069] The viscose fiber fabric of step (1) gained is placed in porcelain boat, then porcelain boat is placed in tube furnace, in N 2 The heating treatment was carried out under t...

Embodiment 1

[0084] The preparation method of the viscose-based nitrogen-containing activated carbon fiber material of the present embodiment comprises the following steps:

[0085] (1) Pretreatment

[0086] Put the 5cm×5cm waste viscose fiber fabric into ethanol and deionized water for ultrasonic cleaning to remove dust and impurities on the surface of the fiber, and dry it in an oven at 60°C for 240min after cleaning;

[0087] Weigh 2.78g of NH 4 Cl and 2.78g of ZnCl 2 , dissolved in 50 mL of deionized water to make 5 wt% NH 4 Cl and 5wt% ZnCl 2 mixed salt solution, then soak the cleaned waste viscose fabric for 60 minutes, dry it in an oven at 60°C for 240 minutes after soaking, and complete the pretreatment of waste viscose fabric;

[0088] (2) Activation-carbonization treatment

[0089] Put the treated viscose fiber fabric into a porcelain boat, place it in a tube furnace, and under the protection of nitrogen atmosphere (the flow rate of nitrogen gas is 40mL / min), raise the tempe...

Embodiment 2

[0101] The preparation method of the viscose-based nitrogen-containing activated carbon fiber material of this embodiment is only different from that of Example 1 in that the heating temperature in step (2) under a nitrogen atmosphere is 700°C, and after reaching 700°C, the nitrogen gas is converted into Carbon dioxide gas with a flow rate of 40mL / min was activated and carbonized at a constant temperature for 60min. Other preparation steps are the same as those in Example 1 and will not be repeated here.

[0102] The nitrogen isothermal adsorption-desorption curve measured under the condition of -196 ℃ for the viscose-based nitrogen-containing activated carbon fiber material of the present embodiment is as follows: Figure 7 As shown, according to the classification of the International Union of Pure and Applied Chemistry, it can be known that the nitrogen isotherm adsorption-desorption curve conforms to Type I, indicating that the pores of the viscose-based nitrogen-containin...

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Abstract

The invention belongs to the technical field of preparation and application of active carbon fiber materials, and particularly relates to a viscose-based nitrogen-containing active carbon fiber material as well as a preparation method and application thereof. The mass content of nitrogen in the material is 4.27-7.43%, the specific surface area is 609-1159 cm < 2 > / g, and the total pore volume is 0.31-0.54 cm < 3 > / g. The viscose-based nitrogen-containing active carbon fiber material is large in specific surface area and high in microporosity, the used raw materials are easy to obtain, economical and environmentally friendly, carbonization-activation is completed in one step in preparation of the viscose-based nitrogen-containing active carbon fiber material, operation is simple, and time consumption and energy consumption are reduced. The viscose-based nitrogen-containing active carbon fiber material has good adsorbability to carbon dioxide, has excellent CO2 / CH4 selectivity, and has a wide application prospect in the field of gas adsorption and separation.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of activated carbon fiber materials, and in particular relates to a viscose-based nitrogen-containing activated carbon fiber material and its preparation method and application. Background technique [0002] Activated porous carbon has a high specific surface area and porosity; the preparation process is simple, the output is high, the raw materials are easy to obtain, and the cost is low; by changing the preparation parameters and optimizing the combination method, it is easy to control its pore structure; the pore-forming agent used can be sublimated by itself With a series of advantages such as the way of pore formation, it has been extensively studied as an adsorbent. [0003] In recent years, some scholars have found that activated carbon fiber cloth (i.e. activated porous carbon fiber material) is an efficient gas adsorbent. Compared with traditional powder and granular a...

Claims

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Application Information

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IPC IPC(8): C01B32/318C01B32/336C02F1/28B01D53/02
CPCC01B32/318C01B32/336C02F1/281C02F1/283B01D53/02Y02P20/151Y02C20/20Y02C20/40
Inventor 李瑶高雅茹王彬彬王燕王娅鸽张涛
Owner HENAN POLYTECHNIC UNIV
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