Novel activated carbon fiber adsorbing substance as well as preparation method and use thereof

A technology of activated carbon fiber and adsorbent, which is applied in the application field of mercury removal adsorbent, can solve the problems of mercury removal, limited research stage, etc., and achieves the effects of strong adsorption capacity, high reactivity and easy realization.

Inactive Publication Date: 2009-07-15
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing technologies for controlling mercury emissions: coal washing and washing to remove mercury, sorbent injection technology, conventional pollutant control and mercur

Method used

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  • Novel activated carbon fiber adsorbing substance as well as preparation method and use thereof
  • Novel activated carbon fiber adsorbing substance as well as preparation method and use thereof
  • Novel activated carbon fiber adsorbing substance as well as preparation method and use thereof

Examples

Experimental program
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Example Embodiment

[0033] Example one

[0034] Weigh 1g of ammonium heptamolybdate into a beaker, add deionized water and stir to dissolve it. Transfer the ammonium heptamolybdate solution into a 250ml volumetric flask and make a constant volume to obtain an ammonium heptamolybdate solution with a concentration of 4mg / ml. Take 4g activated carbon fiber (specific surface area is 1000m 2 / g viscose-based activated carbon fiber) was placed in a 250ml brown wide-mouth bottle, and 250ml of ammonium heptamolybdate solution was added. Under the condition of 40℃ water bath, after 24 hours of adsorption and immersion, the activated carbon fiber was washed repeatedly with deionized water. Then it was placed in a porcelain boat, heated and decomposed for 3 hours in a tube furnace at 450°C under Ar atmosphere (air flow rate 200ml / min), and then the surface loaded molybdenum trioxide (MoO 3 ) Of activated carbon fiber. In the process of thermal decomposition, a dilute hydrochloric acid solution is required to ab...

Example Embodiment

[0036] Example two

[0037] Weigh 1g of ammonium heptamolybdate into a beaker, add deionized water and stir to dissolve it. Transfer the ammonium heptamolybdate solution into a 250ml volumetric flask and make a constant volume to obtain an ammonium heptamolybdate solution with a concentration of 4mg / ml. Take 4g activated carbon fiber (specific surface area is 1000m 2 / g viscose-based activated carbon fiber) was placed in a 250ml brown wide-mouthed bottle, and 250ml of ammonium heptamolybdate solution was added. After standing for about 24 hours in a water bath at 45°C, the activated carbon fiber was rinsed repeatedly with deionized water. Then it was placed in a porcelain boat, heated and decomposed for 3.5 hours in a tube furnace at 450°C under Ar atmosphere (air flow rate 200ml / min), and then the surface loaded molybdenum trioxide (MoO 3 ) Of activated carbon fiber. In the process of thermal decomposition, a dilute hydrochloric acid solution is required to absorb the exhaust gas...

Example Embodiment

[0039] Example three

[0040] Weigh 10 g of ammonium heptamolybdate and place it in a beaker, add deionized water and stir to dissolve it to prepare an ammonium heptamolybdate solution with a concentration of 4 mg / ml. Take 8g activated carbon fiber (specific surface area is 1000m 2 / g viscose-based activated carbon fiber) was placed in a 500ml brown wide-mouthed bottle, and 500ml of ammonium heptamolybdate solution was added. After standing for 48 hours in a water bath at 50°C for adsorption, the activated carbon fiber was washed repeatedly with deionized water. Then it was placed in a porcelain boat, heated and decomposed for 4 hours in a tube furnace at 500°C under Ar atmosphere (air flow rate 200ml / min), and then the surface loaded molybdenum trioxide (MoO 3 ) Of activated carbon fiber. In the process of thermal decomposition, a dilute hydrochloric acid solution is required to absorb the exhaust gas (NH 3 Exhaust).

[0041] Take 5g MoO 3 -Activated carbon fiber is placed in a p...

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Abstract

The invention discloses a novel activated carbon fiber adsorbent a preparation method and the application thereof. The activated carbon fiber adsorbent is characterized by carrying MoS2 on the surface of activated carbon fiber. The preparation method comprises the following steps: the activated carbon fiber is used as a carrier, ammonium molybdate is used as a precursor, and deionized water is used as a solvent to be prepared into steeping liquor, wherein the mass ratio of the activated carbon fiber to the ammonium molybdate is 1 : 0.25 to 0.3; the ammonium molybdate is carried in the activated carbon fiber by a wet immersion method, and then, the activated carbon fiber immersed with the ammonium molybdate is heated to 450 to 500 DEG C in inert atmosphere to be oxidized and decomposed to obtain MoO3-activated carbon fiber; and then, the MoO3-activated carbon fiber is heated to 800 to 825 DEG C in Ar/H2S to be sulfurized, and finally, the activated carbon fiber with the surface carried with MoS2 is prepared, i.e. the activated carbon fiber adsorbent is prepared. When the activated carbon fiber adsorbent is used for removing mercury in fume, the effect is good, and the activated carbon fiber adsorbent also has the advantages of simple preparation and easy process control.

Description

(1) Technical field [0001] The invention relates to a novel activated carbon fiber adsorbent and its preparation method and application, in particular to its application as a mercury-removing adsorbent. (2) Background technology [0002] Mercury is of great concern due to its high toxicity, bioaccumulation and difficulty in capturing. Lower concentrations of mercury reduce agricultural yields, while higher concentrations cause crop death. Mercury is converted to methylmercury under the action of microorganisms. Methylmercury is a more toxic substance than mercury and can cause even more harm. Once mercury is released into the atmosphere, it can persist in the environment and cause long-term pollution problems. A large portion of mercury in the atmosphere comes from anthropogenic activities. Among them, the mercury produced by coal combustion and waste incineration accounts for the vast majority. [0003] The current flue gas pollution control devices can remove divalent...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/32
Inventor 任建莉罗誉娅陈俊杰徐璋张雪梅钟英杰
Owner ZHEJIANG UNIV OF TECH
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