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Preparation method of charcoal ammonia adsorbent

A technology of ammonia adsorption and biochar, applied in separation methods, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of poor adsorption effect and high cost

Pending Publication Date: 2020-10-27
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional activated carbon is usually prepared from non-renewable fossil energy, and the cost is very high. Finding cheap raw materials is the key to improving the cost performance of adsorption technology.
On the other hand, due to the limitation of surface properties, the adsorption effect of activated carbon materials directly on ammonia is poor, and modification measures must be taken to improve the affinity of ammonia to achieve higher adsorption efficiency.

Method used

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  • Preparation method of charcoal ammonia adsorbent
  • Preparation method of charcoal ammonia adsorbent
  • Preparation method of charcoal ammonia adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Peel the pomelo peel and wash it, dry it at 120°C and crush it, and then use a 40-mesh standard sieve to get the hole powder. Put the powder into a beaker, add absolute ethanol at a ratio of 1g:20mL and soak for 12 hours, filter and dry, seal and set aside. Put 3g of pomelo peel powder into a 25ml beaker, use the equal volume impregnation method, add zinc chloride solution with an impregnation ratio of 1:1, mix well, and place at room temperature for 10h. Dry the mixture and transfer it to a tube furnace, control the heating rate to 10°C / min, heat to 450°C, and keep for 50min. Take it out after cooling down, soak it in (1+10) hydrochloric acid for 20min, pour it into a suction filtration device and wash it with hot water until the filtrate pH=6~7, then transfer the washed solid phase product to an oven, and drum it at 120°C Air-dry for more than 3 hours until the surface moisture is completely removed, and then pass through a 40-mesh sieve after grinding to obtain a ca...

Embodiment 2

[0030] Wash, dry and grind the pomelo peel, and then use a 40-mesh standard sieve to get the perforated powder. Put the powder into a beaker, add absolute ethanol at a ratio of 1g:15mL and soak for 24 hours, filter and dry, seal and set aside. Put 4g pomelo peel powder into a 25ml beaker, use the equal volume impregnation method, add zinc chloride solution with an impregnation ratio of 1:0.8, mix well, and place at room temperature for 11h. The mixture was dried and transferred to a tube furnace, the heating rate was controlled at 5°C / min, heated to 400°C, and kept for 60min. Take it out after cooling down, soak in (1+8) hydrochloric acid for 35min, pour it into a suction filtration device and wash it with hot water until the filtrate pH=6~7, then transfer the washed solid phase product to an oven, and drum at 120°C Air-dry for more than 3 hours until the surface moisture is completely removed, and then pass through a 40-mesh sieve after grinding to obtain a carbon material. ...

Embodiment 3

[0033] After the pomelo peel was washed, dried and ground to 40 meshes, the porous powder was put into a beaker, and absolute ethanol was added at a ratio of 1g:25mL and soaked for 15 hours, filtered and dried, and sealed for later use. Put 6g of pomelo peel powder into a 25ml beaker, use the equal volume impregnation method, add zinc chloride solution with an impregnation ratio of 1:1.25, mix well, and place at room temperature for 12h. The mixture was dried and transferred to a tube furnace, the heating rate was controlled at 30°C / min, heated to 415°C and kept for 60min. Remove after cooling down, soak in (1+9) hydrochloric acid for 30min, pour into a suction filtration device and wash with hot water until the filtrate pH=6~7, then transfer the washed solid phase product to an oven, and drum at 110°C Air-dry for more than 3 hours until the surface moisture is completely removed, and then pass through a 40-mesh sieve after grinding to obtain a carbon material.

[0034] Immer...

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Abstract

The invention discloses a preparation method of a charcoal ammonia adsorbent. The method mainly comprises the steps of shaddock peel raw material treatment, dipping activation, carbonization reaction,washing separation, drying and sieving, dipping modification and the like. The shaddock peel charcoal ammonia adsorption material prepared by the method has a developed pore structure, and a large number of pores are communicated with one another; the material is high in mechanical strength, high in thermal stability and good in ammonia adsorption effect; compared with common commercial activatedcarbon, the porous structure is richer, and the BET specific surface area is increased by 5-10 times. And the method provided by the invention makes resource utilization of solid wastes into charcoal, and has the advantages of high yield, easy realization of continuous large-batch production, and low cost.

Description

technical field [0001] The invention belongs to the technical field of environmental protection adsorption materials, and in particular relates to a preparation method of a pomelo peel biomass activated carbon ammonia adsorbent. Background technique [0002] Ammonia is an important industrial raw material and fertilizer, which plays an important supporting role in the development of agriculture, chemical and pharmaceutical industries or industries. At the same time, ammonia is a typical toxic, harmful and volatile pollutant. The direct discharge of ammonia seriously affects human health and the natural ecological environment, and also causes waste of resources. From the perspective of environmental protection and resource conservation, the purification and recovery of ammonia is of great significance. [0003] At present, there have been a lot of researches on the treatment of ammonia-containing waste gas and wastewater. The main technologies are absorption method, catalyt...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30C02F1/28B01D53/02
CPCB01J20/20B01J20/0244B01J20/0288B01J20/0225B01J20/0296B01J20/0281B01J20/04C02F1/283B01D53/02B01J2220/4825
Inventor 杨柳春朱旻俊周佳浩
Owner XIANGTAN UNIV
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