Regeneration method of honeycomb activated carbon absorbent for absorbing nitric oxide

A honeycomb activated carbon, nitrogen oxide technology, applied in chemical instruments and methods, separation methods, filter regeneration and other directions, can solve the problems of high cost, complex process, not suitable for regeneration, etc., and achieve the effect of convenient regeneration process

Inactive Publication Date: 2011-05-25
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method belongs to biological regeneration, the process is complicated and the cost is high
The literature publishes the regeneration method of activated carbon, but none of them are applicable to the regeneration of honeycomb activated carbon adsorbent for adsorbing nitrogen oxides.

Method used

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  • Regeneration method of honeycomb activated carbon absorbent for absorbing nitric oxide
  • Regeneration method of honeycomb activated carbon absorbent for absorbing nitric oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Place the saturated honeycomb activated carbon adsorbent in a vacuum oven (-0.1mpa) at 100°C for vacuum desorption at room temperature for 5 times;

[0022] Soak the desorbed honeycomb activated carbon adsorbent in 5% ammonia solution for 0.5 hours, then rinse it slowly with water for 5 times, and dry the activated carbon in an oven at 100°C for 8 hours;

[0023] Soak the dried activated carbon in 8% urea solution for 40 minutes, then take it out and dry it in a vacuum oven at 200°C for 2 hours to realize the regeneration of the honeycomb activated carbon.

Embodiment 2

[0025] First, the honeycomb activated carbon adsorbed nitrogen oxides was placed in a 100°C vacuum oven (-0.1mpa) for vacuum desorption at room temperature for 5 times;

[0026] Soak the desorbed activated carbon in 5% ammonia solution for 0.5 hours, then rinse it slowly with water for 5 times, then dry the activated carbon in an oven at 100°C for 8 hours;

[0027] Soak the dried activated carbon in 3% urea solution for 40 minutes, then take it out and dry it in a vacuum oven at 200°C for 2 hours to realize the regeneration of the honeycomb activated carbon.

Embodiment 3

[0029] First, the honeycomb activated carbon adsorbed nitrogen oxides was placed in a 100°C vacuum oven (-0.1mpa) for vacuum desorption at room temperature for 5 times;

[0030] Soak the desorbed activated carbon in 5% ammonium bicarbonate solution for 0.5 hours, then rinse slowly with clean water for 3 times, and dry the activated carbon in an oven at 100°C for 8 hours;

[0031] Soak the dried activated carbon in 8% urea solution for 20 minutes, then take it out and dry it in a vacuum oven at 180°C for 3 hours to realize the regeneration of the honeycomb activated carbon.

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Abstract

The invention discloses a regeneration method of a honeycomb activated carbon absorbent for absorbing nitric oxide. In the regeneration method, the technology combining vacuum analysis and redox is adopted to achieve the regeneration of the honeycomb activated carbon absorbent for absorbing the nitric oxide; neutralization absorption processing is carried out on the nitric oxide adsorbate in honeycomb activated carbon by using weak alkaline solution containing NH3; and the impregnated urea solution is used as reductant-oxidant, roasting is performed in a vacuum oven so as to achieve the regeneration of activated carbon. The regeneration method has the advantages that the regeneration process is convenient and efficient, and the property of the absorbent is basically not influenced, so that the absorbent can be repeatedly recycled.

Description

technical field [0001] The invention relates to a regeneration method of an activated carbon adsorbent, in particular to a regeneration method of a honeycomb activated carbon adsorbent for adsorbing nitrogen oxides. Background technique [0002] The regeneration of adsorbent is to remove the adsorbate from the adsorbent by some method and restore its adsorption capacity under the condition that its own structure does not change or rarely changes, so as to achieve the purpose of repeated use. [0003] The regeneration of gas activated carbon mainly has the following methods: [0004] (1) Heating regeneration method: by increasing the temperature of the adsorbent, the adsorbate is desorbed, and the adsorbent is regenerated. Almost all kinds of adsorbents can be recovered by thermal regeneration. Different adsorption processes require different temperatures, the stronger the adsorption, the higher the heating temperature for desorption. [0005] (2) Chemical regeneration met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/34
Inventor 张豪杰姚炜刘洋周洁眭艳辉
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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