A preparation method of halloysite/carbon composite adsorbent for removing NO

A carbon composite, adsorbent technology, applied in separation methods, chemical instruments and methods, alkali metal compounds, etc., to achieve the effects of improved adsorption and removal capacity, large energy consumption, and reduced specific surface area

Active Publication Date: 2019-08-30
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, halloysite and chitosan have been used to prepare halloysite / carbon composite adsorbents with high specific surface area for the adsorption of NO.

Method used

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  • A preparation method of halloysite/carbon composite adsorbent for removing NO
  • A preparation method of halloysite/carbon composite adsorbent for removing NO

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment prepares halloysite / carbon composite adsorbent according to the following steps:

[0023] (1) Pulverizing halloysite raw ore and passing through a 300-mesh sieve to obtain halloysite powder;

[0024] (2) Weigh 8g of potassium carbonate powder and dissolve it in 60mL of deionized water to obtain a potassium carbonate solution; weigh 2g of halloysite powder and 4g of chitosan respectively, add them to the potassium carbonate solution, immerse and stir for 4h, and dry at 105°C A mixed material is obtained.

[0025] (3) Put the mixed material in the horizontal tube sintering furnace, N 2 Under the atmosphere, the temperature was raised to 800°C at a rate of 5°C / min, and the activation was maintained for 90 minutes. After cooling to room temperature, a black product was obtained;

[0026](4) Wash the black product with 0.1 mol / L hydrochloric acid solution to remove residual activator, and then wash the sample with 60°C deionized water until neutral. The w...

Embodiment 2

[0037] This embodiment prepares halloysite / carbon composite adsorbent according to the following steps:

[0038] (1) Pulverizing halloysite raw ore and passing through a 300-mesh sieve to obtain halloysite powder;

[0039] (2) Weigh 8g of potassium carbonate powder and dissolve it in 60mL of deionized water to obtain a potassium carbonate solution; weigh 2g of halloysite powder and 4g of chitosan respectively, add them to the potassium carbonate solution, immerse and stir for 4h, and dry at 105°C A mixed material is obtained.

[0040] (3) Put the mixed material in the horizontal tube sintering furnace, N 2 Under the atmosphere, the temperature was raised to 800°C at a rate of 5°C / min, and the activation was maintained for 120 minutes. After cooling to room temperature, a black product was obtained;

[0041] (4) Wash the black product with 0.1 mol / L hydrochloric acid solution to remove residual activator, and then wash the sample with 60°C deionized water until neutral. The...

Embodiment 3

[0045] This embodiment prepares halloysite / carbon composite adsorbent according to the following steps:

[0046] (1) Pulverizing halloysite raw ore and passing through a 300-mesh sieve to obtain halloysite powder;

[0047] (2) Weigh 8g of potassium carbonate powder and dissolve it in 60mL of deionized water to obtain a potassium carbonate solution; weigh 2g of halloysite powder and 4g of chitosan respectively, add them to the potassium carbonate solution, immerse and stir for 4h, and dry at 105°C A mixed material is obtained.

[0048] (3) Put the mixed material in the horizontal tube sintering furnace, N 2 Under the atmosphere, the temperature was raised to 800°C at a rate of 5°C / min, and the activation was maintained for 150 minutes. After cooling to room temperature, a black product was obtained;

[0049] (4) Wash the black product with 0.1 mol / L hydrochloric acid solution to remove residual activator, and then wash the sample with 60°C deionized water until neutral. The...

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Abstract

The invention discloses a preparation method of a halloysite-carbon composite adsorbent for removing NO. The halloysite-carbon composite adsorbent is prepared by taking cheap halloysite and chitosan as raw materials and taking potassium carbonate free of pollution to the environment as an activating agent through one-step carbonization and activation. According to the absorbent, the specific area can reach 1,500 m<2> / g or above, a developed micropore and mesopore structure is achieved, and the certain mechanical strength is achieved; the raw material source is wide, the cost is low, a preparation technology is simple, and the good adsorption capacity to nitric oxide is achieved.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent for removing NO, in particular to a preparation method of a halloysite / carbon composite adsorbent. Background technique [0002] With the rapid development of industry, the need for the treatment of industrial waste gas is becoming more and more urgent. Nitrogen oxide is the main substance of air pollution, which will destroy the ozone layer, form acid rain and photochemical smog, and seriously endanger the ecological environment and human health. The main component of nitrogen oxides is NO, so the removal of nitrogen oxides, especially the removal of NO, is of great significance. At present, the technologies for removing NO include reduction method, adsorption method, plasma method, microbial method and so on. Among them, the reduction method is the most widely used, but most of this method is used in various high-concentration emission sources such as thermal power plants, and a large am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01D53/02
Inventor 吴雪平张清心张先龙
Owner HEFEI UNIV OF TECH
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